WO2019196886A1 - 一种预编码矩阵确定方法及装置 - Google Patents

一种预编码矩阵确定方法及装置 Download PDF

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Publication number
WO2019196886A1
WO2019196886A1 PCT/CN2019/082144 CN2019082144W WO2019196886A1 WO 2019196886 A1 WO2019196886 A1 WO 2019196886A1 CN 2019082144 W CN2019082144 W CN 2019082144W WO 2019196886 A1 WO2019196886 A1 WO 2019196886A1
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Prior art keywords
antenna panel
precoding matrix
phase difference
antenna
panel
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PCT/CN2019/082144
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English (en)
French (fr)
Inventor
祝慧颖
黄逸
任海豹
李元杰
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华为技术有限公司
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Publication of WO2019196886A1 publication Critical patent/WO2019196886A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a method and an apparatus for determining a precoding matrix.
  • Massive MIMO massive multiple input multiple output
  • the base station and the user equipment (UE) pre-store or calculate the same codebook, and the base station sends a reference signal, such as a channel state information reference signal (CSI-RS), to the user equipment, and the UE uses the
  • CSI-RS channel state information reference signal
  • the reference signal is subjected to channel estimation to further determine channel state information CSI, such as a precoding matrix indicator (PMI).
  • PMI precoding matrix indicator
  • the base station antenna can be composed of multiple antenna panels, such as two antenna panels or four antenna panels.
  • the precoding matrix determination mode occupies more uplink control channel resources.
  • the present application provides a method and an apparatus for determining a precoding matrix, which can reduce the occupation of an uplink control channel or an uplink data channel resource.
  • a method for determining a precoding matrix including:
  • the network device sends first configuration information to the user equipment, where the first configuration information indicates an antenna panel spacing or a first phase difference of the antenna panel;
  • the network device receives a precoding matrix indication PMI determined by the user equipment according to the antenna panel spacing or the first phase difference of the antenna panel.
  • the base station indicates the phase difference of the antenna panel to the user equipment, which reduces the occupation of the uplink channel resources.
  • the first antenna panel phase difference is a function of the antenna panel pitch.
  • the function is that the P is the number of CSI-RS ports of one antenna panel, p is an integer and 1 ⁇ p ⁇ Ng-1, and Ng is the number of antenna panels.
  • c x, y is the front of the matrix corresponding to the first antenna panel in the precoding matrix
  • the element of the xth row and the yth column of the submatrix of the row, c x+pP,y is the element of the yth column of the (x+pP)th row in the precoding matrix
  • ⁇ p indicates a third phase difference of the antenna panel
  • the third phase difference of the antenna panel is a function of the antenna panel pitch or the first phase difference of the antenna panel
  • a p , b p , a ' p , b' p is a correction value of ⁇
  • the first configuration information indicates a first phase difference of the antenna panel Ng is the number of antenna panels.
  • the column vector of the precoding matrix is:
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • P CSI-RS 2NgN 1 N 2 .
  • the method further includes:
  • the column vector of the precoding matrix is:
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • P CSI-RS 2NgN 1 N 2 .
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • P CSI-RS 2NgN 1 N 2 .
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • P CSI-RS 2NgN 1 N 2 .
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • a method for determining a precoding matrix including:
  • the user equipment sends a precoding matrix indication PMI determined according to the antenna panel spacing or the first phase difference of the antenna panel to the network device.
  • the base station indicates the phase difference of the antenna panel to the user equipment, which reduces the occupation of the uplink channel resources.
  • the first antenna panel phase difference is a function of the antenna panel pitch.
  • the function is that the P is the number of CSI-RS ports of one antenna panel, p is an integer and 1 ⁇ p ⁇ Ng-1, and Ng is the number of antenna panels.
  • c x, y is the front of the matrix corresponding to the first antenna panel in the precoding matrix
  • the element of the xth row and the yth column of the submatrix of the row, c x+pP,y is the element of the yth column of the (x+pP)th row in the precoding matrix
  • ⁇ p indicates a third phase difference of the antenna panel
  • the third phase difference of the antenna panel is a function of the antenna panel pitch or the first phase difference of the antenna panel
  • a p , b p , a ' p , b' p is a correction value of ⁇
  • the first configuration information indicates a first phase difference of the antenna panel Ng is the number of antenna panels.
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • P CSI-RS 2NgN 1 N 2 .
  • the method further includes:
  • the user equipment sends first indication information to the network device, where the first indication information indicates a first phase difference correction value ⁇ p of the antenna panel, where
  • the column vector of the precoding matrix is:
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • P CSI-RS 2NgN 1 N 2 .
  • a network device including a transmitter and a receiver:
  • the transmitter is configured to send first configuration information to the user equipment, where the first configuration information indicates an antenna panel spacing or a first phase difference of the antenna panel;
  • the receiver is configured to receive a precoding matrix indicating PMI determined by the user equipment according to the antenna panel spacing or a first phase difference of an antenna panel.
  • the base station indicates the phase difference of the antenna panel to the user equipment, which reduces the occupation of the uplink channel resources.
  • the first antenna panel phase difference is a function of the antenna panel pitch.
  • the function is that the P is the number of CSI-RS ports of one antenna panel, p is an integer and 1 ⁇ p ⁇ Ng-1, and Ng is the number of antenna panels.
  • c x, y is the front of the matrix corresponding to the first antenna panel in the precoding matrix
  • the element of the xth row and the yth column of the submatrix of the row, c x+pP,y is the element of the yth column of the (x+pP)th row in the precoding matrix
  • ⁇ p indicates a third phase difference of the antenna panel
  • the third phase difference of the antenna panel is a function of the antenna panel pitch or the first phase difference of the antenna panel
  • a p , b p , a ' p , b' p is a correction value of ⁇
  • the first configuration information indicates a first phase difference of the antenna panel Ng is the number of antenna panels.
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • P CSI-RS 2NgN 1 N 2 .
  • the receiver is further configured to receive first indication information that is sent by the user equipment, where the first indication information indicates The first phase difference correction value ⁇ p of the antenna panel, wherein
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • P CSI-RS 2NgN 1 N 2 .
  • a user equipment including a receiver and a transmitter:
  • the receiver is configured to receive first configuration information that is sent by the network device, where the first configuration information indicates an antenna panel spacing or a first phase difference of the antenna panel;
  • the transmitter is configured to send, to the network device, a precoding matrix indication PMI determined according to the antenna panel spacing or a first phase difference of an antenna panel.
  • the base station indicates the phase difference of the antenna panel to the user equipment, which reduces the occupation of the uplink channel resources.
  • the first antenna panel phase difference is a function of the antenna panel spacing.
  • the elements of the xth row and the yth column of the matrix, c x+pP, y are elements of the (y)th row of the (x+pP)th row in the precoding matrix
  • ⁇ p indicates the second phase difference of the antenna panel, the antenna panel
  • the two phase difference is a function of the antenna panel pitch or the first phase difference of the antenna panel, wherein P is the number of CSI-RS ports of one antenna panel, p is an integer and 1 ⁇ p ⁇ Ng-1, and Ng is an antenna.
  • c x, y is the front of the matrix corresponding to the first antenna panel in the precoding matrix
  • the element of the xth row and the yth column of the submatrix of the row, c x+pP,y is the element of the yth column of the (x+pP)th row in the precoding matrix
  • ⁇ p indicates a third phase difference of the antenna panel
  • the third phase difference of the antenna panel is a function of the antenna panel pitch or the first phase difference of the antenna panel
  • a p , b p , a ' p , b' p is a correction value of ⁇
  • the first configuration information indicates a first phase difference of the antenna panel Ng is the number of antenna panels.
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • P CSI-RS 2NgN 1 N 2 .
  • the transmitter is further configured to send, to the network device, first indication information, where the first indication information indicates the The first phase difference correction value ⁇ p of the antenna panel, wherein
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • P CSI-RS 2NgN 1 N 2 .
  • the implementation implemented by the above user equipment can be implemented by a chip.
  • the solution implemented by the above network device can be implemented by a chip.
  • the network device provided by the present application may include a module for performing the behavior of the network device in the above method design.
  • the module can be software and/or hardware.
  • the terminal provided by the present application may include a module for performing a terminal behavior in the above method design.
  • the module can be software and/or hardware.
  • Yet another aspect of the present application provides a computer readable storage medium having instructions stored therein that, when executed on a computer, cause the computer to perform the methods described in the above aspects.
  • Yet another aspect of the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the methods described in the various aspects above.
  • FIG. 1 is a schematic structural diagram of a possible system for implementing an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for determining a precoding matrix according to an embodiment of the present invention
  • FIG. 3 is a flowchart of another method for determining a precoding matrix according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of another method for determining a precoding matrix according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of another method for determining a precoding matrix according to an embodiment of the present invention.
  • FIG. 6 is a flowchart of another method for determining a precoding matrix according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a network device according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • FIG. 1 shows a possible system network diagram of the present application.
  • at least one terminal 10 communicates with a radio access network (RAN).
  • the RAN comprises at least one network device 20, for the sake of clarity, only one network device and one user equipment UE are shown.
  • the RAN is connected to a core network (CN).
  • the CN may be coupled to one or more external networks, such as the Internet, a public switched telephone network (PSTN), and the like.
  • PSTN public switched telephone network
  • UE User Equipment
  • UE is a terminal device with communication function, which may also be called a terminal, and may include a handheld device with wireless communication function, an in-vehicle device, a wearable device, a computing device, or other connected to a wireless modem.
  • Processing equipment, etc. User equipment can be called different names in different networks, such as: terminals, mobile stations, subscriber units, stations, cellular phones, personal digital assistants, wireless modems, wireless communication devices, handheld devices, laptops, cordless phones, Wireless local loop station, etc.
  • the present application is simply referred to as a user equipment UE.
  • the network device may be a base station (BS), a wireless access device in a cloud network, or a relay station or the like having a wireless transceiver function.
  • a base station which may also be referred to as a base station device, is a device deployed in a wireless access network to provide wireless communication functions.
  • the name of the base station may be different in different wireless access systems, for example, in a Universal Mobile Telecommunications System (UMTS) network, the base station is called a Node B, and the base station in the LTE network is called The evolved Node B (eNB or eNodeB) may be referred to as a Transit Reception Point (TRP), a network node, or a g-Node B (gNB) in a future 5G system.
  • TRP Transit Reception Point
  • gNB g-Node B
  • the embodiment of the invention provides a method for determining a precoding matrix. This method can be applied to the system shown in FIG.
  • the method is implemented by using a base station and a user equipment as an example. As shown in Figure 2, the method includes:
  • Step 201 The base station sends first configuration information to the user equipment, where the first configuration information indicates an antenna panel spacing or a first phase difference of the antenna panel.
  • the first configuration information may carry an antenna panel spacing or a first phase difference of the antenna panel.
  • the first configuration information may also carry Ng-1 indexes, and each index corresponds to a phase difference, which is used to indicate a phase difference between two antenna panels, and each index may occupy more than 2 bits.
  • the first phase difference of the antenna panel can be expressed as Ng is the number of antenna panels.
  • the first phase difference of the antenna panel may be calculated by the base station according to the spacing of the antenna panels, or may be calculated by the base station according to other parameters that may affect the phase difference of the antenna panel.
  • the first phase difference of the antenna panel may be a function of the spacing of the antenna panels, or may be a function of other parameters that affect the phase difference of the antenna panel.
  • the foregoing first configuration information may be carried by radio resource control (RRC) signaling, or by media access control (MAC) layer signaling, for example, by a MAC control element (MAC control element,
  • RRC radio resource control
  • MAC media access control
  • the MAC CE is carried; or carried by physical layer signaling, for example, by downlink control information (DCI).
  • DCI downlink control information
  • Step 202 The user equipment receives the foregoing configuration information.
  • Step 203 The user equipment obtains a precoding matrix column vector according to the first configuration information.
  • the user equipment may determine, by using the foregoing configuration information, a column vector of the precoding matrix according to a preset rule.
  • the base station can also determine the same precoding matrix according to the same rules.
  • the foregoing method may further include:
  • Step 204 The user equipment sends a precoding matrix indicator (PMI) to the base station.
  • PMI precoding matrix indicator
  • the base station determines a matrix or vector in the precoding matrix through the PMI.
  • the base station indicates the phase difference of the antenna panel to the user equipment, which reduces the occupation of the uplink channel resources.
  • the implementation manner of determining the precoding matrix according to the foregoing first configuration information may be various, and is further described below through multiple embodiments.
  • This embodiment provides a broadband mode multi-antenna panel precoding matrix determining method, including:
  • Step 301 The base station sends first configuration information to the user equipment, where the first configuration information indicates an antenna panel spacing or a first phase difference of the antenna panel.
  • the first configuration information may carry an antenna panel spacing or an antenna panel phase difference.
  • the first configuration information may also carry Ng-1 indexes, and each index corresponds to a phase difference, which is used to indicate a phase difference between two antenna panels, and each index may occupy more than 2 bits. By quantifying the antenna panel phase difference by more bits, the quantization accuracy can be improved.
  • the first phase difference of the antenna panel can be expressed as Ng is the number of antenna panels.
  • Step 302 The user equipment receives the foregoing configuration information.
  • Step 303 The user equipment obtains a precoding matrix column vector according to the first configuration information.
  • precoding matrix column vector a more specific example of a precoding matrix column vector is given below.
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • P CSI-RS 2NgN 1 N 2 .
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • P CSI-RS 2NgN 1 N 2 .
  • the values are just examples and can have other values.
  • the Hadamard product is a vector of length N 1 N 2
  • the vector v l,m of the length N 1 N 2 is multiplied by the element at the position.
  • the quantity involved in the foregoing precoding matrix may have the following physical meanings.
  • N 1 represents the number of CSI-RS ports in the horizontal direction of each antenna panel
  • N 2 represents the CSI-RS ports in the vertical direction of each antenna panel.
  • the number of CSI-RS ports corresponding to each antenna panel is 2N 1 N 2 .
  • a precoding matrix representing one polarization direction of each antenna panel is composed of a vector of length N 1 N 2 , wherein A DFT beam vector having a length N 2 in the vertical direction, where O 1 and O 2 respectively represent oversampling factors of horizontal and vertical dimensions, and l and m are horizontal and vertical dimension beam indexes in the precoding matrix; Indicates the phase difference between the two polarization directions, The value can be ⁇ 1, j, -1, -j ⁇ , where n is the polarization phase factor index in the precoding matrix; Indicates the antenna panel phase difference parameter related to the antenna panel spacing.
  • the broadband mode multi-panel precoding matrix is When the layer is 2
  • the wideband mode multi-panel precoding matrix is When the layer is 3
  • the wideband mode multi-panel precoding matrix is When the layer is 4
  • the wideband mode multi-panel precoding matrix is
  • the foregoing method may further include:
  • Step 304 The user equipment feeds back the PMI to the base station.
  • the user equipment After determining the precoding matrix according to the channel state information, the user equipment indicates the selected precoding matrix by feeding back the PMI to the base station.
  • the above PMI contains multiple indexes and can uniquely identify a precoding matrix.
  • the PMI includes a first PMI value corresponding to the wideband channel state information, and a second PMI value corresponding to the subband channel state information.
  • the first PMI value corresponds to the wideband CSI
  • the second PMI value corresponds to the sub-band CSI.
  • the first PMI value corresponds to two first precoding matrix indexes, which are a first horizontal precoding matrix index i 1,1 and a first vertical precoding matrix index i 1,2, respectively.
  • the first PMI value corresponds to three first precoding matrix indexes, which are a first horizontal precoding matrix index i 1,1 , a first vertical precoding matrix index i 1,2 and The first precoding matrix index difference value index i 1,3 ; the second PMI value corresponds to the second precoding matrix index i 2 .
  • the value of the subscript l of the precoding matrix is determined by the first horizontal precoding matrix index i 1,1 ; the value of the subscript m is determined by the first vertical precoding matrix index i 1,2 ; when the number of layers is greater than 1, or with or
  • the difference value of the subscripts (l', m') and (l, m) is determined by the first precoding matrix index difference value index i 1, 3 ; the value of the subscript n is determined by the second precoding matrix index i 2 .
  • Multi-panel precoding matrix structure according to the number of layers of the system and the corresponding broadband mode (or And the value of the subscript (l, m, n) or (l, l', m, m', n) determines the precoding matrix.
  • the base station sends the antenna panel phase difference to the user equipment, which reduces the occupation of the uplink channel resources.
  • This embodiment provides a broadband mode multi-antenna panel precoding matrix determining method, including:
  • Step 401 The base station sends first configuration information to the user equipment, where the first configuration information indicates an antenna panel spacing or a first phase difference of the antenna panel.
  • the first configuration information may carry an antenna panel spacing or a first phase difference of the antenna panel.
  • the first configuration information may also carry Ng-1 indexes, and each index corresponds to a phase difference, which is used to indicate a phase difference between two antenna panels, and each index may occupy more than 2 bits.
  • the first phase difference of the antenna panel can be expressed as Ng is the number of antenna panels.
  • Step 402 The user equipment receives the foregoing configuration information.
  • Step 403 The user equipment feeds back the first indication information to the base station, where the first indication information indicates the first phase difference correction value ⁇ p of the antenna panel, where
  • Step 404 The user equipment determines a column vector of the precoding matrix according to ⁇ k and ⁇ p .
  • the foregoing method may further include:
  • Step 405 The base station determines a column vector of the precoding matrix according to ⁇ k and ⁇ p .
  • precoding matrix column vector a more specific example of a precoding matrix column vector is given below.
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • P CSI-RS 2NgN 1 N 2 .
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • P CSI-RS 2NgN 1 N 2 .
  • the values are just examples and can have other values.
  • the Hadamard product is a vector of length N 1 N 2
  • the vector v l,m of the length N 1 N 2 is multiplied by the element at the position.
  • the quantity involved in the foregoing precoding matrix may have the following physical meanings.
  • N 1 represents the number of CSI-RS ports in the horizontal direction of each antenna panel
  • N 2 represents the CSI-RS ports in the vertical direction of each antenna panel.
  • the number of CSI-RS ports corresponding to each antenna panel is 2N 1 N 2 .
  • a precoding matrix representing one polarization direction of each antenna panel is composed of a vector of length N 1 N 2 , wherein A DFT beam vector having a length N 2 in the vertical direction, where O 1 and O 2 respectively represent oversampling factors of horizontal and vertical dimensions, and l and m are horizontal and vertical dimension beam indexes in the precoding matrix; Indicates the phase difference between the two polarization directions, The value can be ⁇ 1, j, -1, -j ⁇ , where n is the polarization phase factor index in the precoding matrix; Indicates the antenna panel phase difference parameter related to the antenna panel spacing.
  • ⁇ p represents the antenna panel phase difference correction value determined by the UE, wherein Is the correction value index, and the value of ⁇ p can be indicated by 1 bit, for example, for example, Or indicated by 2 bits, for example, for example
  • the broadband mode multi-panel precoding matrix is When the layer is 2
  • the wideband mode multi-panel precoding matrix is When the layer is 3
  • the wideband mode multi-panel precoding matrix is When the layer is 4
  • the wideband mode multi-panel precoding matrix is
  • the foregoing method may further include:
  • Step 406 The user equipment feeds back the PMI to the base station.
  • the user equipment After determining the precoding matrix according to the channel state information, the user equipment indicates the selected precoding matrix by feeding back the PMI to the base station.
  • the above PMI contains multiple indexes and can uniquely identify a precoding matrix.
  • the PMI feedback manner may be multiple, for example:
  • the PMI includes a first PMI value and a second PMI value, wherein the first PMI value corresponds to a wideband CSI, and the second PMI value corresponds to a CSI of a subband.
  • the first PMI value corresponds to four first precoding matrix indexes, which are a first horizontal precoding matrix index i 1,1 , a first vertical precoding matrix index i 1,2 , and a first precoding matrix index difference value.
  • the second PMI value corresponds to the second precoding matrix index i 2 .
  • the value of the index l of the wideband mode multi-panel precoding matrix is determined by the first horizontal precoding matrix index i 1,1 ; the value of the subscript m is determined by the first vertical precoding matrix index i 1,2 ; When the number is greater than 1, or with or The difference value between the subscripts (l', m') and (l, m) is determined by the first precoding matrix index difference value index i 1, 3 ; The value of the first phase factor precoding matrix index It is determined; the value of the subscript n is determined by the second precoding matrix index i 2 .
  • Multi-panel precoding matrix structure according to the number of layers of the system and corresponding to the broadband mode (or And the value of the subscript (l, m, n, p) or (l, l', m, m', n, p) determines the precoding matrix.
  • the PMI includes a first PMI value, a second PMI value, and a third PMI value, where the first PMI value and the third PMI value correspond to a wideband CSI, and the second PMI value corresponds to a CSI of a subband .
  • the first PMI value corresponds to three first precoding matrix indexes, which are a first horizontal precoding matrix index i 1,1 , a first vertical precoding matrix index i 1,2, and a first precoding matrix index difference value, respectively.
  • Index i 1,3 the second PMI value corresponds to the second precoding matrix index i 2
  • the third PMI value corresponds to the third precoding matrix index i 3 .
  • the value of the index l of the wideband mode multi-panel precoding matrix is determined by the first horizontal precoding matrix index i 1,1 ; the value of the subscript m is determined by the first vertical precoding matrix index i 1,2 ; When the number is greater than 1, or with or The difference value of the subscripts (l', m') and (l, m) is determined by the first precoding matrix index difference value index i 1, 3 ; the value of the subscript n is determined by the second precoding matrix index i 2 Subscript The value is indexed by the third precoding matrix determine.
  • Multi-panel precoding matrix structure according to the number of layers of the system and the corresponding broadband mode (or And the value of the subscript (l, m, n, p) or (l, l', m, m', n, p) determines the precoding matrix.
  • the base station indicates the phase difference of the antenna panel to the terminal, and the terminal further corrects the phase difference of the antenna panel, thereby improving the accuracy of the precoding matrix.
  • the correction value is indicated by fewer bits, the occupation of the uplink channel resources is not increased.
  • This embodiment provides a seedband mode two-antenna panel precoding matrix determining method, including:
  • Step 501 The base station sends first configuration information to the user equipment, where the first configuration information indicates an antenna panel spacing or a first phase difference of the antenna panel.
  • the first configuration information may carry an antenna panel spacing or an antenna panel phase difference.
  • the first configuration information may also carry one index, one index corresponding to one phase difference, used to indicate the phase difference between the two antenna panels, and one index may occupy more than two bits. By quantifying the antenna panel phase difference by more bits, the quantization accuracy can be improved.
  • Step 502 The user equipment receives the foregoing configuration information.
  • Step 503 The user equipment obtains a precoding matrix column vector according to the first configuration information.
  • the foregoing method may further include:
  • Step 504 The user equipment feeds back the PMI to the base station.
  • precoding matrix column vector a more specific example of a precoding matrix column vector is given below.
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • the values are just examples and can have other values.
  • the Hadamard product is a vector of length N 1 N 2
  • the vector v l,m of the length N 1 N 2 is multiplied by the element at the position.
  • the quantity involved in the foregoing precoding matrix may have the following physical meanings.
  • N 1 represents the number of CSI-RS ports in the horizontal direction of each antenna panel
  • N 2 represents the CSI-RS ports in the vertical direction of each antenna panel.
  • the number of CSI-RS ports corresponding to each antenna panel is 2N 1 N 2 .
  • a precoding matrix representing one polarization direction of each antenna panel is composed of a vector of length N 1 N 2 , wherein A DFT beam vector having a length N 2 in the vertical direction, where O 1 and O 2 respectively represent oversampling factors of horizontal and vertical dimensions, and l and m are horizontal and vertical dimension beam indexes in the precoding matrix; Indicates the phase difference between the two polarization directions, The value may be ⁇ 1, j, -1, -j ⁇ , and n 0 is a polarization phase factor index in the precoding matrix; Representing the phase factor of the broadband, The value can be p 1 , p 2 are broadband phase factor indices; Represents the phase factor of the subband, The value can be n 1 , n 2 are phase factor indices of subbands; Indicates the antenna panel phase difference parameter related to the antenna panel spacing.
  • the sub-band mode two antenna panel precoding matrix is When the layer is 2, the sub-band mode two antenna panel precoding matrix is When the layer is 3, the sub-band mode two antenna panel precoding matrix is When the layer is 4, the sub-band mode two antenna panel precoding matrix is
  • the PMI fed back by the UE may have multiple implementation manners, for example:
  • the PMI includes a first PMI value and a second PMI value, wherein the first PMI value corresponds to a wideband CSI, and the second PMI value corresponds to a CSI of a subband.
  • the first PMI value corresponds to four first precoding matrix indexes, which are a first horizontal precoding matrix index i 1,1 , a first vertical precoding matrix index i 1,2 , and a first precoding matrix index difference value.
  • the second PMI value corresponds to the second precoding matrix index i 2 .
  • Two-panel precoding matrix structure according to the number of layers of the system and the corresponding subband mode (or And the value of the subscript (l, m, n, p) or (l, l', m, m', n, p) determines the precoding matrix.
  • the PMI includes a first PMI value, a second PMI value, and a third PMI value, where the first PMI value and the third PMI value correspond to a wideband CSI, and the second PMI value corresponds to a CSI of a subband .
  • the first PMI value corresponds to three first precoding matrix indexes, which are a first horizontal precoding matrix index i 1,1 , a first vertical precoding matrix index i 1,2, and a first precoding matrix index difference value, respectively.
  • Index i 1,3 the second PMI value corresponds to the second precoding matrix index i 2
  • the third PMI value corresponds to the third precoding matrix index i 3 .
  • Two-panel precoding matrix structure according to the number of layers of the system and the corresponding subband mode (or And the value of the subscript (l, m, n, p) or (l, l', m, m', n, p) determines the precoding matrix.
  • the base station sends the antenna panel phase difference to the user equipment, which reduces the occupation of the uplink channel resources.
  • the element of the xth row and the yth column of the submatrix of the row, c x+pP,y is the element of the yth column of the (x+pP)th row in the precoding matrix
  • ⁇ p is a function of the configurable parameter, used to indicate the phase difference between the antenna panels, and b p , b′ p are used to indicate the correction value of the phase difference ⁇ p between the antenna panels, the correction value It may be determined by the UE and fed back to
  • precoding matrix column vector a more specific example of a precoding matrix column vector is given below.
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • the values are just examples and can have other values.
  • the Hadamard product is a vector of length N 1 N 2
  • the vector v l,m of the length N 1 N 2 is multiplied by the element at the position.
  • the quantity involved in the foregoing precoding matrix may have the following physical meanings.
  • N 1 represents the number of CSI-RS ports in the horizontal direction of each antenna panel
  • N 2 represents the CSI-RS ports in the vertical direction of each antenna panel.
  • the number of CSI-RS ports corresponding to each antenna panel is 2N 1 N 2 .
  • a precoding matrix representing one polarization direction of each antenna panel is composed of a vector of length N 1 N 2 , wherein A DFT beam vector having a length N 2 in the vertical direction, where O 1 and O 2 respectively represent oversampling factors of horizontal and vertical dimensions, and l and m are horizontal and vertical dimension beam indexes in the precoding matrix; Indicates the phase difference between the two polarization directions, The value may be ⁇ 1, j, -1, -j ⁇ , and n 0 is a polarization phase factor index in the precoding matrix; Represents the phase factor of the subband, The value can be n 1 , n 2 are phase factor indices of subbands; Indicates the antenna panel phase difference parameter related to the antenna panel spacing.
  • the sub-band mode two antenna panel precoding matrix is When the layer is 2, the sub-band mode two antenna panel precoding matrix is When the layer is 3, the sub-band mode two antenna panel precoding matrix is When the layer is 4, the sub-band mode two antenna panel precoding matrix is
  • the PMI includes a first PMI value and a second PMI value, wherein the first PMI value corresponds to a wideband CSI, and the second PMI value corresponds to a sub-band CSI.
  • the first PMI value corresponds to three first precoding matrix indexes, which are a first horizontal precoding matrix index i 1,1 , a first vertical precoding matrix index i 1,2, and a first precoding matrix index difference value, respectively.
  • Index i 1,3 a first precoding matrix index difference value, respectively.
  • the second PMI value corresponds to the second precoding matrix index i 2 .
  • Two-panel precoding matrix structure according to the number of layers of the system and the corresponding subband mode (or And the value of the subscript (l, m, n) or (l, l', m, m', n) determines the precoding matrix.
  • the base station indicates the phase difference of the antenna panel to the terminal, and the terminal further corrects the phase difference of the antenna panel on the sub-band granularity, thereby improving the accuracy of the precoding matrix.
  • the correction value is indicated by fewer bits, the occupation of the uplink channel resources in the sub-band mode is not increased.
  • This embodiment provides a seed band mode four-antenna panel precoding matrix determining method, including:
  • Step 601 The base station sends first configuration information to the user equipment, where the first configuration information indicates an antenna panel spacing or a first phase difference of the antenna panel.
  • the first configuration information may carry an antenna panel spacing or an antenna panel phase difference.
  • the first configuration information may carry an antenna panel spacing or a first phase difference of the antenna panel.
  • the first configuration information may also carry three indexes, each index corresponding to one phase difference, used to indicate the phase difference between the two antenna panels, and each index may occupy more than two bits. By quantifying the antenna panel phase difference by more bits, the quantization accuracy can be improved.
  • Step 602 The user equipment receives the foregoing configuration information.
  • Step 603 The user equipment obtains a precoding matrix column vector according to the first configuration information.
  • the foregoing method may further include:
  • Step 604 The user equipment feeds back the PMI to the base station.
  • the correction value may be determined by the UE and fed back to the base station, where P is the number of CSI-RS ports corresponding to each panel, and p is a positive integer in [1, N g -1].
  • precoding matrix column vector a more specific example of a precoding matrix column vector is given below.
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • the values are just examples and can have other values.
  • the Hadamard product is a vector of length N 1 N 2
  • the vector v l,m of the length N 1 N 2 is multiplied by the element at the position.
  • the quantity involved in the foregoing precoding matrix may have the following physical meanings.
  • N 1 represents the number of CSI-RS ports in the horizontal direction of each antenna panel
  • N 2 represents the CSI-RS ports in the vertical direction of each antenna panel.
  • the number of CSI-RS ports corresponding to each antenna panel is 2N 1 N 2 .
  • a precoding matrix representing one polarization direction of each antenna panel is composed of a vector of length N 1 N 2 , wherein A DFT beam vector having a length N 2 in the vertical direction, where O 1 and O 2 respectively represent oversampling factors of horizontal and vertical dimensions, and l and m are horizontal and vertical dimension beam indexes in the precoding matrix; Indicates the phase difference between the two polarization directions, The value may be ⁇ 1, j, -1, -j ⁇ , and n 0 is a polarization phase factor index in the precoding matrix; Indicates the inter-panel phase factor of the subband, There is a functional relationship between them, such as a linear relationship; Indicates the antenna panel phase difference parameter related to the antenna panel spacing.
  • inter-panel phase factor of the sub-band At least one phase factor is a fixed value, or has a predefined value rule, or is indicated to the UE by the TRP through the high layer signaling, and the remaining phase factor needs feedback from the UE, and the phase factor value may be
  • the corresponding n 1 and/or n 2 and/or n 3 are the phase factor indices fed back by the UE.
  • the sub-band mode four-panel precoding matrix is When the layer is 2, the sub-band mode four-panel precoding matrix is When the layer is 3, the sub-band mode four-panel precoding matrix is When the layer is 4, the sub-band mode four-panel precoding matrix is
  • the PMI includes a first PMI value and a second PMI value, where the first PMI value corresponds to a wideband CSI, and the second PMI value corresponds to a CSI of a subband.
  • the first PMI value corresponds to three first precoding matrix indexes, which are a first horizontal precoding matrix index i 1,1 , a first vertical precoding matrix index i 1,2, and a first precoding matrix index difference value, respectively.
  • Index i 1,3 a first precoding matrix index difference value, respectively.
  • the second PMI value corresponds to the second precoding matrix index i 2 .
  • Four-panel precoding matrix structure according to the number of layers of the system and the corresponding subband mode (or And the value of the subscript (l, m, n) or (l, l', m, m', n) determines the sub-band mode four-panel precoding matrix.
  • the correction value of the phase difference ⁇ p which can be determined by the UE and fed back to the base station, where P is the number of CSI-RS ports corresponding to each panel, and
  • precoding matrix column vector a more specific example of a precoding matrix column vector is given below.
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • the values are just examples and can have other values.
  • the Hadamard product is a vector of length N 1 N 2
  • the vector v l,m of the length N 1 N 2 is multiplied by the element at the position.
  • the quantity involved in the foregoing precoding matrix may have the following physical meanings.
  • N 1 represents the number of CSI-RS ports in the horizontal direction of each antenna panel
  • N 2 represents the CSI-RS ports in the vertical direction of each antenna panel.
  • the number of CSI-RS ports corresponding to each antenna panel is 2N 1 N 2 .
  • a precoding matrix representing one polarization direction of each antenna panel is composed of a vector of length N 1 N 2 , wherein A DFT beam vector having a length N 2 in the vertical direction, where O 1 and O 2 respectively represent oversampling factors of horizontal and vertical dimensions, and l and m are horizontal and vertical dimension beam indexes in the precoding matrix; Indicates the phase difference between the two polarization directions, The value may be ⁇ 1, j, -1, -j ⁇ , and n 0 is a polarization phase factor index in the precoding matrix; Indicates the inter-panel phase factor of the subband, where n 1 , n 2 , and n 3 are the phase factor indices of the subbands.
  • An inter-panel phase factor representing a UE-specific bandwidth which can be determined by the UE and fed back to the base station.
  • the value can be p 1 and p 2 are inter-panel phase factor indices of UE-specific wideband.
  • inter-panel phase factor of the sub-band At least one phase factor is a fixed value, or has a predefined value rule, or is indicated to the UE by the TRP through the high layer signaling, and the remaining phase factor needs feedback from the UE, and the phase factor value may be
  • the corresponding n 1 and/or n 2 and/or n 3 are the phase factor indices fed back by the UE.
  • the sub-band mode four-panel precoding matrix is When the number of layers of data to be transmitted is 1, the sub-band mode four-panel precoding matrix is When the number of layers is 2, the sub-band mode four-panel precoding matrix is When the number of layers is 3, the sub-band mode four-panel precoding matrix is When the number of layers is 4, the sub-band mode four-panel precoding matrix is
  • the PMI fed back by the UE may have multiple implementation manners, for example:
  • the PMI includes a first PMI value and a second PMI value, wherein the first PMI value corresponds to a wideband CSI, and the second PMI value corresponds to a CSI of a subband.
  • the first PMI value corresponds to four first precoding matrix indexes, which are a first horizontal precoding matrix index i 1,1 , a first vertical precoding matrix index i 1,2 , and a first precoding matrix index difference value.
  • the second PMI value corresponds to the second precoding matrix index i 2 .
  • Multi-panel precoding matrix structure according to the number of layers of the system and corresponding to the broadband mode (or And the subscript (l, m, n, p) or (l, l', m, m', n, p) values determine the subband mode four panel precoding matrix.
  • the PMI includes three values of a first PMI value, a second PMI value, and a third PMI, where the first PMI value and the third PMI value correspond to a wideband CSI, and the second PMI value and the subband CSI corresponds.
  • the first PMI value corresponds to three first precoding matrix indexes, which are a first horizontal precoding matrix index i 1,1 , a first vertical precoding matrix index i 1,2, and a first precoding matrix index difference value, respectively.
  • Index i 1,3 the second PMI value corresponds to the second precoding matrix index i 2
  • the third PMI value corresponds to the third precoding matrix index i 3 .
  • Multi-panel precoding matrix structure according to the number of layers of the system and the corresponding subband mode (or And the subscript (l, m, n, p) or (l, l', m, m', n, p) values determine the subband mode four panel precoding matrix.
  • the element of the xth row and the yth column of the submatrix of the row, c x+pP,y is the element of the yth column of the (x+pP)th row in the precoding matrix
  • ⁇ p is a function of the configurable parameter, used to indicate the phase difference between the antenna panels, and b p , b′ p are used to indicate the correction value of the phase difference ⁇ p between the antenna panels, the correction value It may be determined by the UE and fed back to
  • precoding matrix column vector a more specific example of a precoding matrix column vector is given below.
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • the values are just examples and can have other values.
  • the Hadamard product is a vector of length N 1 N 2
  • the vector v l,m of the length N 1 N 2 is multiplied by the element at the position.
  • the quantity involved in the foregoing precoding matrix may have the following physical meanings.
  • N 1 represents the number of CSI-RS ports in the horizontal direction of each antenna panel
  • N 2 represents the CSI-RS ports in the vertical direction of each antenna panel.
  • the number of CSI-RS ports corresponding to each antenna panel is 2N 1 N 2 .
  • a precoding matrix representing one polarization direction of each antenna panel is composed of a vector of length N 1 N 2 , wherein A DFT beam vector having a length N 2 in the vertical direction, where O 1 and O 2 respectively represent oversampling factors of horizontal and vertical dimensions, and l and m are horizontal and vertical dimension beam indexes in the precoding matrix; Indicates the phase difference between the two polarization directions, The value may be ⁇ 1, j, -1, -j ⁇ , and n 0 is a polarization phase factor index in the precoding matrix; Indicates the inter-panel phase factor of the sub-bands, n 1 , n 2 , n 3 , n 4 , n 5 , n 6 are the phase factor indices of the sub-bands, There is a functional relationship between them, such as a linear relationship; Indicates the antenna panel phase difference parameter related to the antenna panel spacing.
  • inter-panel phase factor of the sub-band At least one phase factor is a fixed value, or has a predefined value rule, or is indicated to the UE by the TRP through the high layer signaling, and the remaining phase factor needs feedback from the UE, and the phase factor value may be Corresponding n 1 and/or n 2 and/or n 3 and/or n 4 and/or n 5 and/or n 6 are phase factor indices fed back by the UE.
  • the sub-band mode four-panel precoding matrix is When the number of layers is 2, the sub-band mode four-panel precoding matrix is When the number of layers is 3, the sub-band mode four-panel precoding matrix is When the number of layers is 4, the sub-band mode four-panel precoding matrix is
  • the PMI includes a first PMI value and a second PMI value, where the first PMI value corresponds to a wideband CSI, and the second PMI value corresponds to a CSI of a subband.
  • the first PMI value corresponds to three first precoding matrix indexes, which are a first horizontal precoding matrix index i 1,1 , a first vertical precoding matrix index i 1,2, and a first precoding matrix index difference value, respectively.
  • Index i 1,3 a first precoding matrix index difference value, respectively.
  • the second PMI value corresponds to the second precoding matrix index i 2 .
  • Four-panel precoding matrix structure according to the number of layers of the system and the corresponding subband mode (or And the value of the subscript (l, m, n) or (l, l', m, m', n) determines the sub-band mode four-panel precoding matrix.
  • the element of the xth row and the yth column of the submatrix of the row, c x+P, y is the element of the (y)th column of the (x+P)th row in the precoding matrix,
  • ⁇ p is a function of the configurable parameter, used to indicate the phase difference between the antenna panels, and a p , b p , a' p , b' p are used to indicate the phase difference between the antenna panels ⁇ p
  • the correction value may be
  • precoding matrix column vector a more specific example of a precoding matrix column vector is given below.
  • the phase difference parameter between the antenna panels is a function of ⁇ k ,
  • N 1 , N 2 , O 1 , and O 2 are positive integers and are configured by the network side.
  • the values are just examples and can have other values.
  • the Hadamard product is a vector of length N 1 N 2
  • the vector v l,m of the length N 1 N 2 is multiplied by the element at the position.
  • the quantity involved in the foregoing precoding matrix may have the following physical meanings.
  • N 1 represents the number of CSI-RS ports in the horizontal direction of each antenna panel
  • N 2 represents the CSI-RS ports in the vertical direction of each antenna panel.
  • the number of CSI-RS ports corresponding to each antenna panel is 2N 1 N 2 .
  • a precoding matrix representing one polarization direction of each antenna panel is composed of a vector of length N 1 N 2 , wherein A DFT beam vector having a length N 2 in the vertical direction, where O 1 and O 2 respectively represent oversampling factors of horizontal and vertical dimensions, and l and m are horizontal and vertical dimension beam indexes in the precoding matrix; Indicates the phase difference between the two polarization directions, The value may be ⁇ 1, j, -1, -j ⁇ , and n 0 is a polarization phase factor index in the precoding matrix; An inter-panel phase factor representing a UE-specific bandwidth, which may be determined by the UE and fed back to the base station.
  • the value can be p 1 , p 2 , p 3 , p 4 , p 5 , p 6 are UE-specific wideband inter-panel phase factor indices, which can be determined by the UE and fed back to the base station; Indicates the inter-panel phase factor of the sub-bands, n 1 , n 2 , n 3 , n 4 , n 5 , n 6 are the phase factor indices of the sub-bands, There is a functional relationship between them, such as a linear relationship; Indicates the antenna panel phase difference parameter related to the antenna panel spacing.
  • inter-panel phase factor of the sub-band At least one phase factor is a fixed value, or has a predefined value rule, or is indicated to the UE by the TRP through the high layer signaling, and the remaining phase factor needs feedback from the UE, and the phase factor value may be Corresponding n 1 and/or n 2 and/or n 3 and/or n 4 and/or n 5 and/or n 6 are phase factor indices fed back by the UE.
  • the sub-band mode four-panel precoding matrix is When the number of layers is 2, the sub-band mode four-panel precoding matrix is When the number of layers is 3, the sub-band mode four-panel precoding matrix is When the number of layers is 4, the sub-band mode four-panel precoding matrix is
  • the PMI fed back by the UE may have multiple implementation manners, for example:
  • the PMI includes a first PMI value and a second PMI value, wherein the first PMI value corresponds to a wideband CSI, and the second PMI value corresponds to a sub-band CSI.
  • the first PMI value corresponds to four first precoding matrix indexes, which are a first horizontal precoding matrix index i 1,1 , a first vertical precoding matrix index i 1,2 , and a first precoding matrix index difference value.
  • the second PMI value corresponds to the second precoding matrix index i 2 .
  • Multi-panel precoding matrix structure according to the number of layers of the system and the corresponding subband mode (or And the subscript (l, m, n, p) or (l, l', m, m', n, p) values determine the subband mode four panel precoding matrix.
  • the PMI includes a first PMI value, a second PMI value, and a third PMI value, wherein the first PMI value and the third PMI value correspond to a wideband CSI, and the second PMI value corresponds to a CSI of the subband.
  • the first PMI value corresponds to three first precoding matrix indexes, which are a first horizontal precoding matrix index i 1,1 , a first vertical precoding matrix index i 1,2, and a first precoding matrix index difference value, respectively.
  • Index i 1,3 corresponds to the second PMI value corresponds to the second precoding matrix index i 2
  • the third PMI value corresponds to the third precoding matrix index i 3 .
  • Multi-panel precoding matrix structure according to the number of layers of the system and corresponding to the broadband mode (or And the subscript (l, m, n, p) or (l, l', m, m', n, p) values determine the subband mode four panel precoding matrix.
  • Embodiments of the present invention further provide an apparatus embodiment for implementing the steps and methods in the foregoing method embodiments.
  • the method, the steps, the technical details, the technical effects and the like of the foregoing method embodiments are also applicable to the device embodiments, and will not be described in detail later.
  • FIG. 7 shows a schematic structural diagram of a network device that can be applied to the system shown in FIG. 1.
  • Network device 20 includes one or more remote radio units (RRUs) 701 and one or more baseband units (BBUs) 702.
  • the RRU 701 may be referred to as a transceiver unit, a transceiver, a transceiver circuit or a transceiver, etc., which may include at least one antenna 7011 and a radio frequency unit 7012.
  • the RRU 701 is mainly used for transmitting and receiving radio frequency signals and converting radio frequency signals and baseband signals, for example, for transmitting signaling indications or reference signals in the foregoing embodiments to the terminal.
  • the BBU 702 part is mainly used for baseband processing, network device control, and the like.
  • the RRU 701 and the BBU 702 may be physically disposed together or physically separated, that is, distributed base stations.
  • the BBU 702 is a control center of a network device, and may also be referred to as a processing unit, and is mainly used to perform baseband processing functions such as channel coding, multiplexing, modulation, and spreading.
  • the BBU 702 may be configured by one or more boards, and multiple boards may jointly support a single access standard radio access network (such as a 5G network), or may separately support wireless access of different access systems. network.
  • the BBU 702 also includes a memory 7021 and a processor 7022.
  • the memory 7021 is used to store necessary instructions and data.
  • the processor 7022 is configured to control the network device to perform necessary actions.
  • Memory 7021 and processor 7022 can serve one or more boards. That is, the memory and processor can be individually set on each board. It is also possible that multiple boards share the same memory and processor.
  • the necessary circuits are also provided on each board.
  • the foregoing network device may be used to implement the method in the foregoing method embodiment, specifically:
  • a transmitter configured to send, to the user equipment, first configuration information, where the first configuration information indicates an antenna panel spacing or an antenna panel first phase difference.
  • a receiver configured to receive a precoding matrix indicating PMI determined by the user equipment according to the antenna panel spacing or the first phase difference of the antenna panel.
  • the receiver is further configured to receive first indication information that is fed back by the user equipment, where the first indication information indicates a first phase difference correction value of the antenna panel.
  • the processor is configured to determine a precoding matrix according to the foregoing first configuration information.
  • the processor is further configured to determine a matrix or a vector in the precoding matrix according to the PMI.
  • FIG. 8 provides a schematic structural diagram of a terminal.
  • the terminal can be adapted for use in the system shown in FIG.
  • FIG. 8 shows only the main components of the terminal.
  • the terminal 10 includes a processor, a memory, a control circuit or an antenna, and an input and output device.
  • the processor is mainly used for processing communication protocols and communication data, and controlling the entire terminal, executing software programs, and processing data of the software programs.
  • the memory is primarily used to store software programs and data, such as the codebooks described in the above embodiments.
  • the control circuit is mainly used for converting baseband signals and radio frequency signals and processing radio frequency signals.
  • the control circuit together with the antenna can also be called a transceiver, and is mainly used for transmitting and receiving RF signals in the form of electromagnetic waves.
  • the input and output device such as a touch screen, a display screen or a keyboard, is mainly used for receiving data input by a user and outputting data to the user.
  • the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal, and then sends the radio frequency signal to the outside through the antenna in the form of electromagnetic waves.
  • the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data.
  • FIG. 8 shows only one memory and processor for ease of illustration. In an actual terminal, there may be multiple processors and memories.
  • the memory may also be referred to as a storage medium or a storage device, and the like.
  • the processor may include a baseband processor and a central processing unit, and the baseband processor is mainly used to process communication protocols and communication data, and the central processing unit is mainly used to control the entire terminal and execute the software.
  • the processor in FIG. 8 integrates the functions of the baseband processor and the central processing unit.
  • the baseband processor and the central processing unit can also be independent processors and interconnected by technologies such as a bus.
  • the terminal may include multiple baseband processors to accommodate different network standards.
  • the terminal may include multiple central processors to enhance its processing capabilities, and various components of the terminal may be connected through various buses.
  • the baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit can also be expressed as a central processing circuit or a central processing chip.
  • the functions of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to implement the baseband processing function.
  • the antenna and control circuit having the transceiving function can be regarded as the transceiving unit 801 of the terminal 10, and the processor having the processing function is regarded as the processing unit 802 of the terminal 10.
  • the terminal 10 includes a transceiver unit 801 and a processing unit 802.
  • the transceiver unit can also be referred to as a transceiver, a transceiver, or a transceiver.
  • the device for implementing the receiving function in the transceiver unit 801 can be regarded as a receiving unit, and the device for implementing the sending function in the transceiver unit 801 is regarded as a sending unit, that is, the transceiver unit 801 includes a receiving unit and a sending unit.
  • the receiving unit may also be referred to as a receiver, a receiver or a receiving circuit, etc.
  • the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit.
  • the foregoing terminal may be used to implement the method in the foregoing method embodiment, specifically:
  • a receiver configured to receive first configuration information sent by the network device, where the first configuration information indicates an antenna panel spacing or a first phase difference of the antenna panel;
  • a transmitter configured to send, to the network device, a precoding matrix indication PMI determined by the user equipment according to the antenna panel spacing or a first phase difference of an antenna panel.
  • the transmitter is further configured to send first indication information to the network device, where the first indication information indicates the first phase difference correction value of the antenna panel.
  • the user equipment determines a precoding matrix according to the first configuration information, and determines a PMI to indicate a matrix or a vector in the precoding matrix.
  • the above embodiments it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).

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Abstract

本申请提供了一种预编码矩阵确定方法及装置，可以减少对上行控制信道或上行数据信道资源的占用。该预编码矩阵确定方法包括：网络设备向用户设备发送第一配置信息，所述第一配置信息指示天线面板间距或者天线面板第一相位差；所述网络设备接收所述用户设备根据所述天线面板间距或者天线面板第一相位差确定的预编码矩阵指示PMI。本发明实施例中，通过基站向用户设备指示天线面板相位差，减少了上行信道资源的占用。

Description

一种预编码矩阵确定方法及装置
本申请要求于2018年04月13日提交中国国家知识产权局、申请号为201810332271.5、申请名称为“一种预编码矩阵确定方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种预编码矩阵确定方法及装置。
背景技术
在新一代无线接入技术(New Radio,NR)中，引入了大规模多输入多输出(Massive Multiple Input Multiple Output,Massive MIMO)技术来提高***容量。在Massive MIMO技术中，可以基于码本的方式对基站待发送数据进行预编码，以减少不同数据流之间的干扰。基站和用户设备(User Equipment，UE)通过预先存储或者计算得到相同的码本，基站向用户设备发送参考信号，例如信道状态信息参考信号(Channel State Information Reference Signal，CSI-RS)，UE利用该参考信号进行信道估计，进一步确定信道状态信息CSI，例如预编码矩阵指示(precoding matrix indicator，PMI)。UE将PMI反馈给基站，基站利用PMI确定预编码矩阵，并对待发送数据进行预编码。在NR***下，基站天线可以由多个天线面板组成，例如两天线面板或者四天线面板。
由于天线面板间的间距等因素，不同天线面板间会存在相位差，即不同天线面板的信号到达同一UE的信号存在相位差，该相位差可以由UE测量得到后反馈给基站，使得基站可以得到准确的预编码矩阵。这种预编码矩阵确定方式占用的上行控制信道资源较多。
发明内容
本申请提供了一种预编码矩阵确定方法及装置，可以减少对上行控制信道或上行数据信道资源的占用。
第一方面，提供了一种预编码矩阵确定方法，包括：
网络设备向用户设备发送第一配置信息，所述第一配置信息指示天线面板间距或者天线面板第一相位差；
所述网络设备接收所述用户设备根据所述天线面板间距或者天线面板第一相位差确定的预编码矩阵指示PMI。
本发明实施例中，通过基站向用户设备指示天线面板相位差，减少了上行信道资源的占用。
结合第一方面，在第一种可能的实现方式中，所述第一天线面板相位差为所述天线面板间距的函数。
结合第一方面或第一方面第一种可能的实现方式，在第二种可能的实现方式中，所述预编码矩阵包括与所述天线面板对应的Ng个矩阵，所述Ng个矩阵满足c x+pP,y＝β p*c x,y，其中，c x,y为预编码矩阵中与第一天线面板对应的矩阵的第x行第y列的元素，c x+pP,y为预编码矩阵中第(x+pP)行第y列的元素，β p指示天线面板第二相位差，所述天线面板第二相位差是所述天线面板间距或者所述天线面板第一相位差的函数，所述P为一个天线面板的CSI-RS端口数，p为整数且1≤p≤Ng-1，Ng为天线面板数量。
结合第一方面或第一方面第一种可能的实现方式，在第三种可能的实现方式中，所述预编码矩阵包括与所述天线面板对应的Ng个矩阵，所述Ng个矩阵满足c x+pP,y＝a pb pβ p*c x,y，
Figure PCTCN2019082144-appb-000001
其中，c x,y为预编码矩阵中与第一天线面板对应的矩阵的前
Figure PCTCN2019082144-appb-000002
行的子矩阵的第x行第y列的元素，c x+pP,y为预编码矩阵中第(x+pP)行第y列的元素,
Figure PCTCN2019082144-appb-000003
为预编码矩阵中第
Figure PCTCN2019082144-appb-000004
行第y列的元素，β p指示天线面板第三相位差，所述天线面板第三相位差是所 述天线面板间距或者所述天线面板第一相位差的函数，a p、b p、a' p、b' p为β p的修正值，所述P为一个天线面板的CSI-RS端口数，p为整数且1≤p≤Ng-1，Ng为天线面板数量。
结合第一方面，在第四种可能的实现方式中，所述第一配置信息指示所述天线面板第一相位差
Figure PCTCN2019082144-appb-000005
Ng为天线面板数量。
结合第一方面第四种可能实现方式，在第五种可能的实现方式中，当Ng＝2时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000006
其中，
Figure PCTCN2019082144-appb-000007
Figure PCTCN2019082144-appb-000008
Figure PCTCN2019082144-appb-000009
Figure PCTCN2019082144-appb-000010
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2。
结合第一方面第四种可能的实现方式，在第六种可能的实现方式中，所述方法还包括：
所述网络设备接收所述用户设备发送的第一指示信息，所述第一指示信息指示所述天线面板第一相位差修正值δ p，其中，
Figure PCTCN2019082144-appb-000011
结合第一方面第六种可能的实现方式，在第七种可能的实现方式中，当Ng＝2时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000012
其中，
Figure PCTCN2019082144-appb-000013
Figure PCTCN2019082144-appb-000014
Figure PCTCN2019082144-appb-000015
Figure PCTCN2019082144-appb-000016
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2。
结合第一方面第四种可能的实现方式，在第八种可能的实现方式中，
当Ng＝4时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000017
其中，
Figure PCTCN2019082144-appb-000018
Figure PCTCN2019082144-appb-000019
Figure PCTCN2019082144-appb-000020
Figure PCTCN2019082144-appb-000021
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2。
结合第一方面第五种或第八种可能的实现方式，在第九种可能的实现方式中，
Figure PCTCN2019082144-appb-000022
其中，
Figure PCTCN2019082144-appb-000023
或者，
Figure PCTCN2019082144-appb-000024
其中，
Figure PCTCN2019082144-appb-000025
结合第一方面第六种可能的实现方式，在第十种可能的实现方式中，
当Ng＝4时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000026
其中，
Figure PCTCN2019082144-appb-000027
Figure PCTCN2019082144-appb-000028
Figure PCTCN2019082144-appb-000029
Figure PCTCN2019082144-appb-000030
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2。
结合第一方面第七种或第十种可能的实现方式，在第十一种可能的实现方式中：
Figure PCTCN2019082144-appb-000031
其中，
Figure PCTCN2019082144-appb-000032
或者，
Figure PCTCN2019082144-appb-000033
其中，
Figure PCTCN2019082144-appb-000034
结合第一方面第四种可能的实现方式，在第十二种可能的实现方式中，
当Ng＝2时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000035
其中，
Figure PCTCN2019082144-appb-000036
Figure PCTCN2019082144-appb-000037
Figure PCTCN2019082144-appb-000038
Figure PCTCN2019082144-appb-000039
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2，
Figure PCTCN2019082144-appb-000040
Figure PCTCN2019082144-appb-000041
结合第一方面第四种可能的实现方式，在第十三种可能的实现方式中，
当Ng＝2时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000042
其中，
Figure PCTCN2019082144-appb-000043
Figure PCTCN2019082144-appb-000044
Figure PCTCN2019082144-appb-000045
Figure PCTCN2019082144-appb-000046
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2，
Figure PCTCN2019082144-appb-000047
结合第一方面第四种可能的实现方式，在第十四种可能的实现方式中，
当Ng＝4时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000048
其中，
Figure PCTCN2019082144-appb-000049
Figure PCTCN2019082144-appb-000050
Figure PCTCN2019082144-appb-000051
Figure PCTCN2019082144-appb-000052
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2，
Figure PCTCN2019082144-appb-000053
结合第一方面第四种可能的实现方式，在第十五种可能的实现方式中，
当Ng＝4时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000054
其中，
Figure PCTCN2019082144-appb-000055
Figure PCTCN2019082144-appb-000056
Figure PCTCN2019082144-appb-000057
Figure PCTCN2019082144-appb-000058
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2，
Figure PCTCN2019082144-appb-000059
Figure PCTCN2019082144-appb-000060
结合第一方面第四种可能的实现方式，在第十六种可能的实现方式中，
当Ng＝4时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000061
其中，
Figure PCTCN2019082144-appb-000062
Figure PCTCN2019082144-appb-000063
Figure PCTCN2019082144-appb-000064
Figure PCTCN2019082144-appb-000065
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2，
Figure PCTCN2019082144-appb-000066
结合第一方面第四种可能的实现方式，在第十七种可能的实现方式中，
当Ng＝4时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000067
其中，
Figure PCTCN2019082144-appb-000068
Figure PCTCN2019082144-appb-000069
Figure PCTCN2019082144-appb-000070
Figure PCTCN2019082144-appb-000071
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2，
Figure PCTCN2019082144-appb-000072
Figure PCTCN2019082144-appb-000073
结合第一方面第十二种至第十七种任一可能的实现方式，在第十八种可能的实现方式中，
Figure PCTCN2019082144-appb-000074
其中，
Figure PCTCN2019082144-appb-000075
或者，
Figure PCTCN2019082144-appb-000076
其中，
Figure PCTCN2019082144-appb-000077
第二方面，提供了一种预编码矩阵确定方法，包括：
用户设备接收网络设备发送的第一配置信息，所述第一配置信息指示天线面板间距或者天线面板第一相位差；
所述用户设备向所述网络设备发送根据所述天线面板间距或者天线面板第一相位差确定的预编码矩阵指示PMI。
本发明实施例中，通过基站向用户设备指示天线面板相位差，减少了上行信道资源的占用。
结合第二方面，在第一种可能的实现方式中，所述第一天线面板相位差为所述天线面板间距的函数。
结合第二方面或第二方面第一种可能的实现方式，在第二种可能的实现方式中，所述预编码矩阵包括与所述天线面板对应的Ng个矩阵，所述Ng个矩阵满足c x+pP,y＝β p*c x,y，其中，c x,y为预编码矩阵中与第一天线面板对应的矩阵的第x行第y列的元素，c x+pP,y为预编码矩阵中第(x+pP)行第y列的元素，β p指示天线面板第二相位差，所述天线面板第二相位差是所述天线面板间距或者所述天线面板第一相位差的函数，所述P为一个天线面板的CSI-RS端口数，p为整数且1≤p≤Ng-1，Ng为天线面板数量。
结合第二方面或第二方面第一种可能的实现方式，在第三种可能的实现方式中，所述预编码矩阵包括与所述天线面板对应的Ng个矩阵，所述Ng个矩阵满足c x+pP,y＝a pb pβ p*c x,y，
Figure PCTCN2019082144-appb-000078
其中，c x,y为预编码矩阵中与第一天线面板对应的矩阵的前
Figure PCTCN2019082144-appb-000079
行的子矩阵的第x行第y列的元素，c x+pP,y为预编码矩阵中第(x+pP)行第y列的元素,
Figure PCTCN2019082144-appb-000080
为预编码矩阵中第
Figure PCTCN2019082144-appb-000081
行第y列的元素，β p指示天线面板第三相位差，所述天线面板第三相位差是所述天线面板间距或者所述天线面板第一相位差的函数，a p、b p、a' p、b' p为β p的修正值，所述P为一个天线面板的CSI-RS端口数，p为整数且1≤p≤Ng-1，Ng为天线面板数量。
结合第二方面，在第四种可能的实现方式中，所述第一配置信息指示所述天线面板第一相位差
Figure PCTCN2019082144-appb-000082
Ng为天线面板数量。
结合第二方面第四种可能实现方式，在第五种可能的实现方式中，当Ng＝2时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000083
其中，
Figure PCTCN2019082144-appb-000084
Figure PCTCN2019082144-appb-000085
Figure PCTCN2019082144-appb-000086
Figure PCTCN2019082144-appb-000087
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2。
结合第二方面第四种可能的实现方式，在第六种可能的实现方式中，所述方法还包括：
所述用户设备向所述网络设备发送第一指示信息，所述第一指示信息指示所述天线面板第一相位差修正值δ p，其中，
Figure PCTCN2019082144-appb-000088
结合第二方面第六种可能的实现方式，在第七种可能的实现方式中，当Ng＝2时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000089
其中，
Figure PCTCN2019082144-appb-000090
Figure PCTCN2019082144-appb-000091
Figure PCTCN2019082144-appb-000092
Figure PCTCN2019082144-appb-000093
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2。
第三方面，提供了一种网络设备，包括发送器和接收器：
所述发送器，用于向用户设备发送第一配置信息，所述第一配置信息指示天线面板间距或者天线面板第一相位差；
所述接收器，用于接收所述用户设备根据所述天线面板间距或者天线面板第一相位差确定的预编码矩阵指示PMI。
本发明实施例中，通过基站向用户设备指示天线面板相位差，减少了上行信道资源的占用。
结合第三方面，在第一种可能的实现方式中，所述第一天线面板相位差为所述天线面板间距的函数。
结合第三方面或第三方面第一种可能的实现方式，在第二种可能的实现方式中，所述预编码矩阵包括与所述天线面板对应的Ng个矩阵，所述Ng个矩阵满足c x+pP,y＝β p*c x,y，其中，c x,y为预编码矩阵中与第一天线面板对应的矩阵的第x行第y列的元素，c x+pP,y为预编码矩阵中第(x+pP)行第y列的元素，β p指示天线面板第二相位差，所述天线面板第二相位差是所述天线面板间距或者所述天线面板第一相位差的函数，所述P为一个天线面板的CSI-RS端口数，p为整数且1≤p≤Ng-1，Ng为天线面板数量。
结合第三方面或第三方面第一种可能的实现方式，在第三种可能的实现方式中，所述预编码矩阵包括与所述天线面板对应的Ng个矩阵，所述Ng个矩阵满足c x+pP,y＝a pb pβ p*c x,y，
Figure PCTCN2019082144-appb-000094
其中，c x,y为预编码矩阵中与第一天线面板对应的矩阵的前
Figure PCTCN2019082144-appb-000095
行的子矩阵的第x行第y列的元素，c x+pP,y为预编码矩阵中第(x+pP)行第y列的元素,
Figure PCTCN2019082144-appb-000096
为预编码矩阵中第
Figure PCTCN2019082144-appb-000097
行第y列的元素，β p指示天线面板第三相位差，所述天线面板第三相位差是所述天线面板间距或者所述天线面板第一相位差的函数，a p、b p、a' p、b' p为β p的修正值，所述P为一个天线面板的CSI-RS端口数，p为整数且1≤p≤Ng-1，Ng为天线面板数量。
结合第三方面，在第四种可能的实现方式中，所述第一配置信息指示所述天线面板第一相位差
Figure PCTCN2019082144-appb-000098
Ng为天线面板数量。
结合第三方面第四种可能实现方式，在第五种可能的实现方式中，当Ng＝2时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000099
其中，
Figure PCTCN2019082144-appb-000100
Figure PCTCN2019082144-appb-000101
Figure PCTCN2019082144-appb-000102
Figure PCTCN2019082144-appb-000103
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2。
结合第三方面第四种可能的实现方式，在第六种可能的实现方式中，所述接收器，还用于接 收所述用户设备发送的第一指示信息，所述第一指示信息指示所述天线面板第一相位差修正值δ p，其中，
Figure PCTCN2019082144-appb-000104
结合第三方面第六种可能的实现方式，在第七种可能的实现方式中，当Ng＝2时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000105
其中，
Figure PCTCN2019082144-appb-000106
Figure PCTCN2019082144-appb-000107
Figure PCTCN2019082144-appb-000108
Figure PCTCN2019082144-appb-000109
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2。
第四方面，提供了一种用户设备，包括接收器和发送器：
所述接收器，用于接收网络设备发送的第一配置信息，所述第一配置信息指示天线面板间距或者天线面板第一相位差；
所述发送器，用于向所述网络设备发送根据所述天线面板间距或者天线面板第一相位差确定的预编码矩阵指示PMI。
本发明实施例中，通过基站向用户设备指示天线面板相位差，减少了上行信道资源的占用。
结合第四方面，在第一种可能的实现方式中，所述第一天线面板相位差为所述天线面板间距的函数。
结合第四方面或第四方面第一种可能的实现方式，在第二种可能的实现方式中，3.根据权利要求1或2所述的用户设备，其特征在于，所述预编码矩阵包括与所述天线面板对应的Ng个矩阵，所述Ng个矩阵满足c x+pP,y＝β p*c x,y，其中，c x,y为预编码矩阵中与第一天线面板对应的矩阵的第x行第y列的元素，c x+pP,y为预编码矩阵中第(x+pP)行第y列的元素，β p指示天线面板第二相位差，所述天线面板第二相位差是所述天线面板间距或者所述天线面板第一相位差的函数，所述P为一个天线面板的CSI-RS端口数，p为整数且1≤p≤Ng-1，Ng为天线面板数量。
结合第四方面或第四方面第一种可能的实现方式，在第三种可能的实现方式中，所述预编码矩阵包括与所述天线面板对应的Ng个矩阵，所述Ng个矩阵满足c x+pP,y＝a pb pβ p*c x,y，
Figure PCTCN2019082144-appb-000110
其中，c x,y为预编码矩阵中与第一天线面板对应的矩阵的前
Figure PCTCN2019082144-appb-000111
行的子矩阵的第x行第y列的元素，c x+pP,y为预编码矩阵中第(x+pP)行第y列的元素,
Figure PCTCN2019082144-appb-000112
为预编码矩 阵中第
Figure PCTCN2019082144-appb-000113
行第y列的元素，β p指示天线面板第三相位差，所述天线面板第三相位差是所述天线面板间距或者所述天线面板第一相位差的函数，a p、b p、a' p、b' p为β p的修正值，所述P为一个天线面板的CSI-RS端口数，p为整数且1≤p≤Ng-1，Ng为天线面板数量。
结合第四方面，在第四种可能的实现方式中，所述第一配置信息指示所述天线面板第一相位差
Figure PCTCN2019082144-appb-000114
Ng为天线面板数量。
结合第四方面第四种可能实现方式，在第五种可能的实现方式中，当Ng＝2时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000115
其中，
Figure PCTCN2019082144-appb-000116
Figure PCTCN2019082144-appb-000117
Figure PCTCN2019082144-appb-000118
Figure PCTCN2019082144-appb-000119
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2。
结合第四方面第四种可能的实现方式，在第六种可能的实现方式中，所述发送器，还用于向所述网络设备发送第一指示信息，所述第一指示信息指示所述天线面板第一相位差修正值δ p，其中，
Figure PCTCN2019082144-appb-000120
结合第四方面第六种可能的实现方式，在第七种可能的实现方式中，当Ng＝2时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000121
其中，
Figure PCTCN2019082144-appb-000122
Figure PCTCN2019082144-appb-000123
Figure PCTCN2019082144-appb-000124
Figure PCTCN2019082144-appb-000125
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2。
在第二、三和四方面中，更多的预编码矩阵形式可以参考第一方面，此处不再赘述。
在一种可能的设计中，上述用户设备实现的方案可以由芯片实现。
在一种可能的设计中，上述网络设备实现的方案可以由芯片实现。
在一个可能的设计中，本申请提供的网络设备可以包含用于执行上述方法设计中网络设备行为相对应的模块。所述模块可以是软件和/或是硬件。
在一个可能的设计中，本申请提供的终端可以包含用于执行上述方法设计中终端行为相对应的模块。所述模块可以是软件和/或是硬件。
本申请的又一方面提供了一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行上述各方面所述的方法。
本申请的又一方面提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述各方面所述的方法。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍。
图1为实现本发明实施例的一种可能的***结构示意图；
图2为本发明实施例提供的一种确定预编码矩阵方法流程图；
图3为本发明实施例提供的另一种确定预编码矩阵方法流程图；
图4为本发明实施例提供的另一种确定预编码矩阵方法流程图；
图5为本发明实施例提供的另一种确定预编码矩阵方法流程图；
图6为本发明实施例提供的另一种确定预编码矩阵方法流程图；
图7为本发明实施例提供的一种网络设备的结构示意图；
图8为本发明实施例提供的一种终端的结构示意图。
具体实施方式
下面结合附图，对本申请提供的实施例做详细说明。本发明实施例描述的网络架构以及业务场景是为了更加清楚的说明本发明实施例的技术方案，并不构成对于本发明实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本发明实施例提供的技术方案对于类似的技术问题，同样适用。
图1示出了本申请的一种可能的***网络示意图。如图1所示，至少一个终端10与无线接入网(Radio access network,RAN)进行通信。所述RAN包括至少一个网络设备20，为清楚起见，图中只示出一个网络设备和一个用户设备UE。所述RAN与核心网络(core network,CN)相连。可选的，所述CN可以耦合到一个或者更多的外部网络(External Network)，例如英特网，公共交换电话网(public switched telephone network，PSTN)等。
为便于理解下面对本申请中涉及到的一些名词做些说明。
本申请中，名词“网络”和“***”经常交替使用，但本领域的技术人员可以理解其含义。用户设备(User Equipment，UE)是一种具有通信功能的终端设备，也可以称为终端，可以包括具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其它处理设备等。在不同的网络中用户设备可以叫做不同的名称，例如：终端，移动台，用户单元，站台，蜂窝电话，个人数字助理，无线调制解调器，无线通信设备，手持设备，膝上型电脑，无绳电话，无线本地环路台等。为描述方便，本申请中简称为用户设备UE。网络设备可以是基站(base  station,BS)、云网络中的无线接入设备或中继站等具有无线收发功能的设备。基站也可称为基站设备，是一种部署在无线接入网用以提供无线通信功能的设备。在不同的无线接入***中基站的名称可能有所不同，例如在而在通用移动通讯***(Universal Mobile Telecommunications System，UMTS)网络中基站称为节点B(NodeB),在LTE网络中的基站称为演进的节点B(evolved NodeB，eNB或者eNodeB)，在未来5G***中可以称为收发节点(Transmission Reception Point，TRP)，网络节点或g节点B(g-NodeB，gNB)等。本申请中，“天线面板”和“面板”交替使用，如无特殊说明，面板均指天线面板。
本发明实施例提供了一种预编码矩阵确定方法。该方法可以应用于图1所示的***。下面以基站和用户设备实现该方法为例进行说明。如图2所示，该方法包括：
步骤201、基站向用户设备发送第一配置信息，所述第一配置信息指示天线面板间距或天线面板第一相位差。
第一配置信息可以携带天线面板间距，或者天线面板第一相位差。第一配置信息也可以携带Ng-1个索引，每个索引对应一个相位差，用于指示两个天线面板间的相位差，每个索引可以占用2个以上比特。
可选的，天线面板第一相位差可以表示为
Figure PCTCN2019082144-appb-000126
Ng为天线面板数量。
天线面板第一相位差可以是基站根据天线面板间距计算得到，也可以是基站根据其他可能影响天线面板相位差的参数计算得到的。天线面板第一相位差可以是天线面板间距的函数，也可以是其他影响天线面板相位差的参数的函数。
上述第一配置信息，可以通过无线资源控制(radio resource control，RRC)信令携带；或者通过媒体接入控制(media access control，MAC)层信令携带，例如通过MAC控制单元(MAC control element，MAC CE)携带；或者通过物理层信令携带，例如通过下行控制信息(downlink control information,DCI)携带。
步骤202、用户设备接收上述配置信息。
步骤203、用户设备根据上述第一配置信息得到预编码矩阵列向量。
可选的，用户设备可以根据预设规则利用上述配置信息确定预编码矩阵的列向量。基站也可以根据同样的规则确定出相同的预编码矩阵。
可选的，上述方法还可以包括：
步骤204、用户设备向基站发送预编码矩阵指示(precoding matrix indicator，PMI)。
基站通过PMI确定出预编码矩阵中的一个矩阵或向量。
本发明实施例中，通过基站向用户设备指示天线面板相位差，减少了上行信道资源的占用。
本申请中，根据上述第一配置信息确定预编码矩阵的实现方式可以有多种，下文通过多个实施例进一步说明。
实现方式一：
本实施例提供了一种宽带模式多天线面板预编码矩阵确定方法，包括：
步骤301、基站向用户设备发送第一配置信息，所述第一配置信息指示天线面板间距或天线面板第一相位差。
第一配置信息可以携带天线面板间距，或者天线面板相位差。
第一配置信息也可以携带Ng-1个索引，每个索引对应一个相位差，用于指示两个天线面板间的相位差，每个索引可以占用2个以上比特。通过更多比特来量化天线面板相位差，可以提高量化精度。
天线面板第一相位差可以表示为
Figure PCTCN2019082144-appb-000127
Ng为天线面板数量。
步骤302、用户设备接收上述配置信息。
步骤303、用户设备根据上述第一配置信息得到预编码矩阵列向量。
可选的，所述预编码矩阵包括与所述天线面板对应的Ng个矩阵，c x+pP,y＝β p*c x,y，其中，c x,y为预编码矩阵中与第一天线面板对应的矩阵的第x行第y列的元素，所述Ng个矩阵满足c x+pP,y为预编码矩阵中第(x+pP)行第y列的元素，β p指示天线面板第二相位差，所述天线面板第二相位 差是所述天线面板间距或者所述天线面板第一相位差的函数，所述P为一个天线面板的CSI-RS端口数，p为整数且1≤p≤Ng-1，Ng为天线面板数量。
可选的，下文给出了预编码矩阵列向量的一种更具体的例子。
当Ng＝2时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000128
其中，
Figure PCTCN2019082144-appb-000129
Figure PCTCN2019082144-appb-000130
Figure PCTCN2019082144-appb-000131
Figure PCTCN2019082144-appb-000132
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2。
当Ng＝4时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000133
其中，
Figure PCTCN2019082144-appb-000134
Figure PCTCN2019082144-appb-000135
Figure PCTCN2019082144-appb-000136
Figure PCTCN2019082144-appb-000137
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2。
可选的，
Figure PCTCN2019082144-appb-000138
其中，
Figure PCTCN2019082144-appb-000139
或者，
Figure PCTCN2019082144-appb-000140
其中，
Figure PCTCN2019082144-appb-000141
该实施例中，
Figure PCTCN2019082144-appb-000142
的值仅仅是举例，还可以有其他的值。
其中，
Figure PCTCN2019082144-appb-000143
为Hadamard乘积，所述Hadamard乘积是长度为N 1N 2的矢量
Figure PCTCN2019082144-appb-000144
和长度为N 1N 2的矢量v l,m对应位置上的元素相乘。
可选的，上述预编码矩阵涉及的量可以有以下物理含义。N 1表示每个天线面板水平方向上CSI-RS端口数，N 2表示每个天线面板垂直方向上个CSI-RS端口。考虑天线阵列两个极化方向，每个天线面板对应的CSI-RS端口数为2N 1N 2。
Figure PCTCN2019082144-appb-000145
表示每个天线面板一个极化方向的预编码矩阵由长度为N 1N 2的矢量组成，其中
Figure PCTCN2019082144-appb-000146
表示垂直方向上长度为N 2的DFT波束矢量，其中O 1、O 2分别表示水平维度和垂直维度的过采样因子，l、m是预编码矩阵中水平维度和垂直维度波束索引；
Figure PCTCN2019082144-appb-000147
表示两个极化方向之间的相位差，
Figure PCTCN2019082144-appb-000148
的值可以是{1,j,-1,-j}，n是预编码矩阵中极化相位因子索引；
Figure PCTCN2019082144-appb-000149
表示与天线面板间距相关的天线面板相位差参数。
可选的，当待发送数据的层(layer)的数量为1时，所述宽带模式多面板预编码矩阵为
Figure PCTCN2019082144-appb-000150
当层为2时，所述宽带模式多面板预编码矩阵为
Figure PCTCN2019082144-appb-000151
当层为3时，所述宽带模式多面板预编码矩阵为
Figure PCTCN2019082144-appb-000152
当层为4时，所述宽带模式多面板预编码矩阵为
Figure PCTCN2019082144-appb-000153
可选的，上述方法还可以包括：
步骤304、用户设备向基站反馈PMI。
用户设备根据信道状态信息确定出预编码矩阵后，通过向基站反馈PMI，指示出选择的预编 码矩阵。上述PMI包含多个索引，能够唯一标识出一个预编码矩阵。
所述PMI包括第一PMI值和第二PMI值，所述第一PMI值对应宽带信道状态信息，第二PMI值对应子带信道状态信息。其中第一PMI值与宽带的CSI对应，第二PMI值与子带的CSI对应。当***的层数为1时，所述第一PMI值对应两个第一预编码矩阵索引，分别是第一水平预编码矩阵索引i 1,1和第一垂直预编码矩阵索引i 1,2，当层数大于1时，所述第一PMI值对应三个第一预编码矩阵索引，分别是第一水平预编码矩阵索引i 1,1、第一垂直预编码矩阵索引i 1,2和第一预编码矩阵索引差异值索引i 1,3；第二PMI值对应第二预编码矩阵索引i 2。预编码矩阵的下标l的值由第一水平预编码矩阵索引i 1,1确定；下标m的值由第一垂直预编码矩阵索引i 1,2确定；当层数大于1时，
Figure PCTCN2019082144-appb-000154
或
Figure PCTCN2019082144-appb-000155
和
Figure PCTCN2019082144-appb-000156
或
Figure PCTCN2019082144-appb-000157
中下标(l',m')和(l,m)的差异值由第一预编码矩阵索引差异值索引i 1,3确定；下标n的值由第二预编码矩阵索引i 2确定。根据***的层数和对应的宽带模式多面板预编码矩阵结构
Figure PCTCN2019082144-appb-000158
(或
Figure PCTCN2019082144-appb-000159
)和下标(l,m,n)或者(l,l',m,m',n)的值确定预编码矩阵。
本发明实施例中，通过基站向用户设备发送天线面板相位差，减少了上行信道资源的占用。
实现方式二：
本实施例提供了一种宽带模式多天线面板预编码矩阵确定方法，包括：
步骤401、基站向用户设备发送第一配置信息，所述第一配置信息指示天线面板间距或天线面板第一相位差。
第一配置信息可以携带天线面板间距，或者天线面板第一相位差。第一配置信息也可以携带Ng-1个索引，每个索引对应一个相位差，用于指示两个天线面板间的相位差，每个索引可以占用2个以上比特。
天线面板第一相位差可以表示为
Figure PCTCN2019082144-appb-000160
Ng为天线面板数量。
步骤402、用户设备接收上述配置信息。
步骤403、所述用户设备向所述基站反馈第一指示信息，所述第一指示信息指示所述天线面板第一相位差修正值δ p，其中，
Figure PCTCN2019082144-appb-000161
步骤404、所述用户设备根据α k和δ p确定预编码矩阵的列向量。
可选的，上述方法还可以包括：
步骤405、所述基站根据α k和δ p确定预编码矩阵的列向量。
可选的，所述预编码矩阵包括与所述天线面板对应的Ng个矩阵，所述Ng个矩阵满足c x+pP,y＝θ pβ p*c x,y，其中，c x,y为预编码矩阵中与第一天线面板对应的矩阵的第x行第y列的元素，c x+pP,y为预编码矩阵中第(x+pP)行第y列的元素，β p指示天线面板第三相位差，所述天线面板第三相位差是所述天线面板间距或者所述天线面板第一相位差的函数，θ p指示天线面板间相位差β p的修正值，该修正值可以由UE确定并反馈给基站，所述P为一个天线面板的CSI-RS端口数，p为整数且1≤p≤Ng-1，Ng为天线面板数量。
可选的，下文给出了预编码矩阵列向量的一种更具体的例子。
当Ng＝2时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000162
其中，
Figure PCTCN2019082144-appb-000163
Figure PCTCN2019082144-appb-000164
Figure PCTCN2019082144-appb-000165
Figure PCTCN2019082144-appb-000166
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2。
当Ng＝4时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000167
其中，
Figure PCTCN2019082144-appb-000168
Figure PCTCN2019082144-appb-000169
Figure PCTCN2019082144-appb-000170
Figure PCTCN2019082144-appb-000171
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2。
可选的，
Figure PCTCN2019082144-appb-000172
其中，
Figure PCTCN2019082144-appb-000173
或者，
Figure PCTCN2019082144-appb-000174
其中，
Figure PCTCN2019082144-appb-000175
该实施例中，
Figure PCTCN2019082144-appb-000176
的值仅仅是举例，还可以有其他的值。
其中，
Figure PCTCN2019082144-appb-000177
为Hadamard乘积，所述Hadamard乘积是长度为N 1N 2的矢量
Figure PCTCN2019082144-appb-000178
和长度为N 1N 2的矢量v l,m对应位置上的元素相乘。
可选的，上述预编码矩阵涉及的量可以有以下物理含义。N 1表示每个天线面板水平方向上CSI-RS端口数，N 2表示每个天线面板垂直方向上个CSI-RS端口。考虑天线阵列两个极化方向，每个天线面板对应的CSI-RS端口数为2N 1N 2。
Figure PCTCN2019082144-appb-000179
表示每个天线面板一个极化方向的预编码矩阵由长度为N 1N 2的矢量组成，其中
Figure PCTCN2019082144-appb-000180
表示垂直方向上长度为N 2的DFT波束矢量，其中O 1、O 2分别表示水平维度和垂直维度的过采样因子，l、m是预编码矩阵中水平维度和垂直维度波束索引；
Figure PCTCN2019082144-appb-000181
表示两个极化方向之间的相位差，
Figure PCTCN2019082144-appb-000182
的值可以是{1,j,-1,-j}，n是预编码矩阵中极化相位因子索引；
Figure PCTCN2019082144-appb-000183
表示与天线面板间距相关的天线面板相位差参数。
δ p表示UE确定的天线面板相位差修正值，其中
Figure PCTCN2019082144-appb-000184
是修正值索引，δ p的值可以由1比特指示，取值例如
Figure PCTCN2019082144-appb-000185
或者由2比特指示，取值例如
Figure PCTCN2019082144-appb-000186
可选的，当待发送数据的层(layer)的数量为1时，所述宽带模式多面板预编码矩阵为
Figure PCTCN2019082144-appb-000187
当层为2时，所述宽带模式多面板预编码矩阵为
Figure PCTCN2019082144-appb-000188
当层为3时，所述宽带模式多面板预编码矩阵为
Figure PCTCN2019082144-appb-000189
当层为4时，所述宽带模式多面板预编码矩阵为
Figure PCTCN2019082144-appb-000190
可选，上述方法还可以包括：
步骤406、用户设备向基站反馈PMI。
用户设备根据信道状态信息确定出预编码矩阵后，通过向基站反馈PMI，指示出选择的预编码矩阵。上述PMI包含多个索引，能够唯一标识出一个预编码矩阵。
可选的，所述PMI反馈方式可以有多种，例如：
PMI反馈方式1：所述PMI包括第一PMI值和第二PMI值，其中第一PMI值与宽带的CSI对应，第二PMI值与子带的CSI对应。所述第一PMI值对应四个第一预编码矩阵索引，分别是第一水平预编码矩阵索引i 1,1、第一垂直预编码矩阵索引i 1,2、第一预编码矩阵索引差异值索引i 1,3和第一相位因子预编码矩阵索引i 1,4；第二PMI值对应第二预编码矩阵索引i 2。所述宽带模式多面板预编码矩阵的下标l的值由第一水平预编码矩阵索引i 1,1确定；下标m的值由第一垂直预编码矩阵索引i 1,2确定；当层数大于1时，
Figure PCTCN2019082144-appb-000191
或
Figure PCTCN2019082144-appb-000192
和
Figure PCTCN2019082144-appb-000193
或
Figure PCTCN2019082144-appb-000194
中下标(l',m')和(l,m)的差异值由第一预编码矩阵索引差异值索引i 1,3确定；下标
Figure PCTCN2019082144-appb-000195
的值由第一相位因子预编码矩阵索引
Figure PCTCN2019082144-appb-000196
确定；下标n的值由第二预编码矩阵索引i 2确定。根据***的层数和对应所述宽带模式多面板预编码矩阵结构
Figure PCTCN2019082144-appb-000197
(或
Figure PCTCN2019082144-appb-000198
)和下标(l,m,n,p)或者(l,l',m,m',n,p)的值确定预编码矩阵。
PMI反馈方式2：所述PMI包括第一PMI值、第二PMI值和第三PMI值，其中第一PMI值和第三PMI值与宽带的CSI对应，第二PMI值与子带的CSI对应。所述第一PMI值对应三个第一预编码矩阵索引，分别是第一水平预编码矩阵索引i 1,1、第一垂直预编码矩阵索引i 1,2和第一预编码矩阵索引差异值索引i 1,3；第二PMI值对应第二预编码矩阵索引i 2；第三PMI值对应第三预编码矩阵索引i 3。所述宽带模式多面板预编码矩阵的下标l的值由第一水平预编码矩阵索引i 1,1确定；下标m的值由第一垂直预编码矩阵索引i 1,2确定；当层数大于1时，
Figure PCTCN2019082144-appb-000199
或
Figure PCTCN2019082144-appb-000200
和
Figure PCTCN2019082144-appb-000201
或
Figure PCTCN2019082144-appb-000202
中下标(l',m')和(l,m)的差异值由第一预编码矩阵索引差异值索引i 1,3确定；下标n的值由第二预编码矩阵索引i 2确定；下标
Figure PCTCN2019082144-appb-000203
的值由第三预编码矩阵索引
Figure PCTCN2019082144-appb-000204
确定。根据***的层数和对应的宽带模式多面板预编码矩阵结构
Figure PCTCN2019082144-appb-000205
(或
Figure PCTCN2019082144-appb-000206
)和下标(l,m,n,p)或者(l,l',m,m',n,p)的值确定预编码矩阵。
本实施例中，通过基站向终端指示天线面板相位差，终端进一步修正天线面板相位差，提高了预编码矩阵的准确性。当修正值通过较少比特指示时，不会增加上行信道资源的占用。
实现方式三：
本实施例提供了一种子带模式两天线面板预编码矩阵确定方法，包括：
步骤501、基站向用户设备发送第一配置信息，所述第一配置信息指示天线面板间距或天线面板第一相位差。
第一配置信息可以携带天线面板间距，或者天线面板相位差。
第一配置信息也可以携带1个索引，一个索引对应一个相位差，用于指示两个天线面板间的相位差，一个索引可以占用2个以上比特。通过更多比特来量化天线面板相位差，可以提高量化精度。
天线面板第一相位差可以表示为α k＝α 1,Ng＝1。
步骤502、用户设备接收上述配置信息。
步骤503、用户设备根据上述第一配置信息得到预编码矩阵列向量。
可选的，上述方法还可以包括：
步骤504、用户设备向基站反馈PMI。
本实施例中，预编码矩阵的具体形式可以有多种，下文仅给出两个例子：
预编码矩阵示例1：
可选的，码本中的预编码矩阵包括与天线面板一一对应的多个矩阵，多个面板对应的矩阵之间具有关联关系，所述关联关系具体包括，所述Ng个矩阵满足c x+pP,y＝a pb pβ p*c x,y和
Figure PCTCN2019082144-appb-000207
其中，c x,y为预编码矩阵中与第一面板对应的矩阵的前
Figure PCTCN2019082144-appb-000208
行的子矩阵的第x行第y列的元素，c x+pP,y为预编码矩阵中第(x+pP)行第y列的元素,
Figure PCTCN2019082144-appb-000209
为预编码矩阵中第
Figure PCTCN2019082144-appb-000210
行第y列的元素，β p是所述可配置参数的函数，用于指示天线面板间相位差，a p、b p、a' p、b' p用于指示天线面板间相位差β p的修正值，该修正值可以由UE确定并反馈给基站，所述P为每块面板对应的CSI-RS端口数，p为[1,N g-1]中的正整数。
可选的，下文给出了预编码矩阵列向量的一种更具体的例子。
当Ng＝2时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000211
其中，
Figure PCTCN2019082144-appb-000212
Figure PCTCN2019082144-appb-000213
Figure PCTCN2019082144-appb-000214
Figure PCTCN2019082144-appb-000215
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2，
Figure PCTCN2019082144-appb-000216
Figure PCTCN2019082144-appb-000217
可选的，
Figure PCTCN2019082144-appb-000218
其中，
Figure PCTCN2019082144-appb-000219
或者，
Figure PCTCN2019082144-appb-000220
其中，
Figure PCTCN2019082144-appb-000221
该实施例中，
Figure PCTCN2019082144-appb-000222
的值仅仅是举例，还可以有其他的值。
其中，
Figure PCTCN2019082144-appb-000223
为Hadamard乘积，所述Hadamard乘积是长度为N 1N 2的矢量
Figure PCTCN2019082144-appb-000224
和长度为N 1N 2的矢量v l,m对应位置上的元素相乘。
可选的，上述预编码矩阵涉及的量可以有以下物理含义。N 1表示每个天线面板水平方向上CSI-RS端口数，N 2表示每个天线面板垂直方向上个CSI-RS端口。考虑天线阵列两个极化方向，每个天线面板对应的CSI-RS端口数为2N 1N 2。
Figure PCTCN2019082144-appb-000225
表示每个天线面板一个极化方向的预编码矩阵由长度为N 1N 2的矢量组成，其中
Figure PCTCN2019082144-appb-000226
表示垂直方向上长度为N 2的DFT波束矢量，其中O 1、O 2分别表示水平维度和垂直维度的过采样因子，l、m是预编码矩阵中水平维度和垂直维度波束索引；
Figure PCTCN2019082144-appb-000227
表示两个极化方向之间的相位差，
Figure PCTCN2019082144-appb-000228
的值可以是{1,j,-1,-j}，n 0是预编码矩阵中极化相位因子索引；
Figure PCTCN2019082144-appb-000229
表示宽带的相位因子，
Figure PCTCN2019082144-appb-000230
的值可以是
Figure PCTCN2019082144-appb-000231
p 1、p 2是宽带的相位因子索引；
Figure PCTCN2019082144-appb-000232
表示子带的相位因子，
Figure PCTCN2019082144-appb-000233
的值可以是
Figure PCTCN2019082144-appb-000234
n 1、n 2是子带的相位因子索引；
Figure PCTCN2019082144-appb-000235
表示与天线面板间距相关的天线面板相位差参数。
可选的，当待发送数据的层(layer)的数量为1时，所述子带模式两天线面板预编码矩阵为
Figure PCTCN2019082144-appb-000236
当层为2时，所述子带模式两天线面板预编码矩阵为
Figure PCTCN2019082144-appb-000237
当层为3时，所述子带模式两天线面板预编码矩阵为
Figure PCTCN2019082144-appb-000238
当层为4时，所述子带模式两天线面板预编码矩阵为
Figure PCTCN2019082144-appb-000239
上述UE反馈的PMI可以有多种实现方式，例如：
PMI反馈方式1：所述PMI包括第一PMI值和第二PMI值，其中第一PMI值与宽带的CSI对应，第二PMI值与子带的CSI对应。所述第一PMI值对应四个第一预编码矩阵索引，分别是第一水平预编码矩阵索引i 1,1、第一垂直预编码矩阵索引i 1,2、第一预编码矩阵索引差异值索引i 1,3和第一相位因子预编码矩阵索引i 1,4；第二PMI值对应第二预编码矩阵索引i 2。所述子带模式两面板预编码矩阵下标l的值由第一水平 预编码矩阵索引i 1,1确定；下标m的值由第一垂直预编码矩阵索引i 1,2确定；当层数大于1时，
Figure PCTCN2019082144-appb-000240
或
Figure PCTCN2019082144-appb-000241
和
Figure PCTCN2019082144-appb-000242
或
Figure PCTCN2019082144-appb-000243
中下标(l',m')和(l,m)的差异值由第一预编码矩阵索引差异值索引i 1,3确定；下标p＝[p 1 p 2]的值由第一相位因子预编码矩阵索引i 1,4＝[i 1,4,1 i 1,4,2]；下标n＝[n 0 n 1 n 2]的值由第二预编码矩阵索引i 2＝[i 2,0 i 2,1 i 2,2]确定。根据***的层数和对应所述子带模式两面板预编码矩阵结构
Figure PCTCN2019082144-appb-000244
(或
Figure PCTCN2019082144-appb-000245
)和下标(l,m,n,p)或者(l,l',m,m',n,p)的值确定预编码矩阵。
PMI反馈方式2：所述PMI包括第一PMI值、第二PMI值和第三PMI值，其中第一PMI值和第三PMI值与宽带的CSI对应，第二PMI值与子带的CSI对应。所述第一PMI值对应三个第一预编码矩阵索引，分别是第一水平预编码矩阵索引i 1,1、第一垂直预编码矩阵索引i 1,2和第一预编码矩阵索引差异值索引i 1,3；第二PMI值对应第二预编码矩阵索引i 2；第三PMI值对应第三预编码矩阵索引i 3。所述子带模式两面板预编码矩阵下标l的值由第一水平预编码矩阵索引i 1,1确定；下标m的值由第一垂直预编码矩阵索引i 1,2确定；当层数大于1时，
Figure PCTCN2019082144-appb-000246
或
Figure PCTCN2019082144-appb-000247
和
Figure PCTCN2019082144-appb-000248
或
Figure PCTCN2019082144-appb-000249
中下标(l',m')和(l,m)的差异值由第一预编码矩阵索引差异值索引i 1,3确定；下标n＝[n 0 n 1 n 2]的值由第二预编码矩阵索引i 2＝[i 2,0 i 2,1 i 2,2]确定；下标p＝[p 1 p 2]的值由第三预编码矩阵索引i 3＝[i 3,1 i 3,2]确定。根据***的层数和对应所述子带模式两面板预编码矩阵结构
Figure PCTCN2019082144-appb-000250
(或
Figure PCTCN2019082144-appb-000251
)和下标(l,m,n,p)或者(l,l',m,m',n,p)的值确定预编码矩阵。
本发明实施例中，通过基站向用户设备发送天线面板相位差，减少了上行信道资源的占用。
预编码矩阵示例2：
可选的，码本中的预编码矩阵包括与天线面板一一对应的多个矩阵，多个面板对应的矩阵之间具有关联关系，所述关联关系具体包括，所述Ng个矩阵满足c x+pP,y＝b pβ p*c x,y和
Figure PCTCN2019082144-appb-000252
其中，c x,y为预编码矩阵中与第一面板对应的矩阵的前
Figure PCTCN2019082144-appb-000253
行的子矩阵的第x行第y列的元素，c x+pP,y为预编码矩阵中第(x+pP)行第y列的元素,
Figure PCTCN2019082144-appb-000254
为预编码矩阵中第
Figure PCTCN2019082144-appb-000255
行第y列的元素，β p是所述可配置参数的函数，用于指示天线面板间相位差，b p、b' p用于指示天线面板间相位差β p的修正值，该修正值可以由UE确定并反馈给基站，所述P为每块面板对应的CSI-RS端口数，p为[1,N g-1]中的正整数。
可选的，下文给出了预编码矩阵列向量的一种更具体的例子。
当Ng＝2时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000256
其中，
Figure PCTCN2019082144-appb-000257
Figure PCTCN2019082144-appb-000258
Figure PCTCN2019082144-appb-000259
Figure PCTCN2019082144-appb-000260
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2，
Figure PCTCN2019082144-appb-000261
可选的，
Figure PCTCN2019082144-appb-000262
其中，
Figure PCTCN2019082144-appb-000263
或者，
Figure PCTCN2019082144-appb-000264
其中，
Figure PCTCN2019082144-appb-000265
该实施例中，
Figure PCTCN2019082144-appb-000266
的值仅仅是举例，还可以有其他的值。
其中，
Figure PCTCN2019082144-appb-000267
为Hadamard乘积，所述Hadamard乘积是长度为N 1N 2的矢量
Figure PCTCN2019082144-appb-000268
和长度为N 1N 2的矢量v l,m对应位置上的元素相乘。
可选的，上述预编码矩阵涉及的量可以有以下物理含义。N 1表示每个天线面板水平方向上CSI-RS端口数，N 2表示每个天线面板垂直方向上个CSI-RS端口。考虑天线阵列两个极化方向，每个天线面板对应的CSI-RS端口数为2N 1N 2。
Figure PCTCN2019082144-appb-000269
表示每个天线面板一个极化方向的预编码矩阵由长度为N 1N 2的矢量组成，其中
Figure PCTCN2019082144-appb-000270
表示垂直方向上长度为N 2的DFT波束矢量，其中O 1、O 2分别表示水平维度和垂直维度的过采样因子，l、m是预编码矩阵中水平维度和垂直维度波束索引；
Figure PCTCN2019082144-appb-000271
表示两个极化方向之间的相位差，
Figure PCTCN2019082144-appb-000272
的值可以是{1,j,-1,-j}，n 0是预编码矩阵中极化相位因子索引；
Figure PCTCN2019082144-appb-000273
表示子带的相位因子，
Figure PCTCN2019082144-appb-000274
的值可以是
Figure PCTCN2019082144-appb-000275
n 1、n 2是子带的相位因子索引；
Figure PCTCN2019082144-appb-000276
表示与天线面板间距相关的天线面 板相位差参数。
可选的，当待发送数据的层(layer)的数量为1时，所述子带模式两天线面板预编码矩阵为
Figure PCTCN2019082144-appb-000277
当层为2时，所述子带模式两天线面板预编码矩阵为
Figure PCTCN2019082144-appb-000278
当层为3时，所述子带模式两天线面板预编码矩阵为
Figure PCTCN2019082144-appb-000279
当层为4时，所述子带模式两天线面板预编码矩阵为
Figure PCTCN2019082144-appb-000280
该实施例中，PMI包括第一PMI值和第二PMI值，其中第一PMI值与宽带的CSI对应，第二PMI值与子带的CSI对应。所述第一PMI值对应三个第一预编码矩阵索引，分别是第一水平预编码矩阵索引i 1,1、第一垂直预编码矩阵索引i 1,2和第一预编码矩阵索引差异值索引i 1,3；第二PMI值对应第二预编码矩阵索引i 2。所述子带模式两面板预编码矩阵下标l的值由第一水平预编码矩阵索引i 1,1确定；下标m的值由第一垂直预编码矩阵索引i 1,2确定；当层数大于1时，
Figure PCTCN2019082144-appb-000281
或
Figure PCTCN2019082144-appb-000282
和
Figure PCTCN2019082144-appb-000283
或
Figure PCTCN2019082144-appb-000284
中下标(l',m')和(l,m)的差异值由第一预编码矩阵索引差异值索引i 1,3确定；下标n＝[n 0 n 1 n 2]的值由第二预编码矩阵索引i 2＝[i 2,0 i 2,1 i 2,2]确定。根据***的层数和对应所述子带模式两面板预编码矩阵结构
Figure PCTCN2019082144-appb-000285
(或
Figure PCTCN2019082144-appb-000286
)和下标(l,m,n)或者(l,l',m,m',n)的值确定预编码矩阵。
本实施例中，通过基站向终端指示天线面板相位差，终端在子带粒度上进一步修正天线面板相位差，提高了预编码矩阵的准确性。当修正值通过较少比特指示时，不会增加子带模式下对上行信道资源的占用。
实现方式四：
本实施例提供了一种子带模式四天线面板预编码矩阵确定方法，包括：
步骤601、基站向用户设备发送第一配置信息，所述第一配置信息指示天线面板间距或天线面板第一相位差。
第一配置信息可以携带天线面板间距，或者天线面板相位差。
第一配置信息可以携带天线面板间距，或者天线面板第一相位差。第一配置信息也可以携带3个索引，每个索引对应一个相位差，用于指示两个天线面板间的相位差，每个索引可以占用2个以上比特。通过更多比特来量化天线面板相位差，可以提高量化精度。
天线面板第一相位差可以表示为α k＝[α 1 α 2 α 3]。
步骤602、用户设备接收上述配置信息。
步骤603、用户设备根据上述第一配置信息得到预编码矩阵列向量。
可选的，上述方法还可以包括：
步骤604、用户设备向基站反馈PMI。
本实施例中，预编码矩阵的具体形式可以有多种，下文仅给出两个例子：
预编码矩阵示例1：
可选的，码本中的预编码矩阵包括与天线面板一一对应的多个矩阵，多个面板对应的矩阵之间具有关联关系，所述关联关系具体包括，所述Ng个矩阵满足c x+pP,y＝b pβ p*c x,y，其中，c x,y为预编码矩阵中与第一面板对应的矩阵的第x行第y列的元素，c x+pP,y为预编码矩阵中第(x+pP)行第y列的元素,β p是所述可配置参数的函数，用于指示天线面板间相位差，b p用于指示天线面板间相位差β p的修正值，该修正值可以由UE确定并反馈给基站，所述P为每块面板对应的CSI-RS端口数，p为[1,N g-1]中的正整数。
可选的，下文给出了预编码矩阵列向量的一种更具体的例子。
当Ng＝4时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000287
其中，
Figure PCTCN2019082144-appb-000288
Figure PCTCN2019082144-appb-000289
Figure PCTCN2019082144-appb-000290
Figure PCTCN2019082144-appb-000291
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2，
Figure PCTCN2019082144-appb-000292
可选的，
Figure PCTCN2019082144-appb-000293
其中，
Figure PCTCN2019082144-appb-000294
或者，
Figure PCTCN2019082144-appb-000295
其中，
Figure PCTCN2019082144-appb-000296
该实施例中，
Figure PCTCN2019082144-appb-000297
的值仅仅是举例，还可以有其他的值。
其中，
Figure PCTCN2019082144-appb-000298
为Hadamard乘积，所述Hadamard乘积是长度为N 1N 2的矢量
Figure PCTCN2019082144-appb-000299
和长度为N 1N 2的矢量v l,m对应位置上的元素相乘。
可选的，上述预编码矩阵涉及的量可以有以下物理含义。N 1表示每个天线面板水平方向上 CSI-RS端口数，N 2表示每个天线面板垂直方向上个CSI-RS端口。考虑天线阵列两个极化方向，每个天线面板对应的CSI-RS端口数为2N 1N 2。
Figure PCTCN2019082144-appb-000300
表示每个天线面板一个极化方向的预编码矩阵由长度为N 1N 2的矢量组成，其中
Figure PCTCN2019082144-appb-000301
表示垂直方向上长度为N 2的DFT波束矢量，其中O 1、O 2分别表示水平维度和垂直维度的过采样因子，l、m是预编码矩阵中水平维度和垂直维度波束索引；
Figure PCTCN2019082144-appb-000302
表示两个极化方向之间的相位差，
Figure PCTCN2019082144-appb-000303
的值可以是{1,j,-1,-j}，n 0是预编码矩阵中极化相位因子索引；
Figure PCTCN2019082144-appb-000304
表示子带的面板间相位因子，
Figure PCTCN2019082144-appb-000305
之间存在一种函数关系，例如线性关系；
Figure PCTCN2019082144-appb-000306
表示与天线面板间距相关的天线面板相位差参数。
可选的，子带的面板间相位因子
Figure PCTCN2019082144-appb-000307
中至少有一个相位因子是固定的值，或者有预先定义的取值规则，或者由TRP通过高层信令指示给UE，剩余的相位因子需要UE进行反馈，相位因子取值可以是
Figure PCTCN2019082144-appb-000308
相应的n 1和/或n 2和/或n 3是UE反馈的相位因子索引。
可选的，当待发送数据的层为1时，所述子带模式四面板预编码矩阵为
Figure PCTCN2019082144-appb-000309
当层为2时，所述子带模式四面板预编码矩阵为
Figure PCTCN2019082144-appb-000310
当层为3时，所述子带模式四面板预编码矩阵为
Figure PCTCN2019082144-appb-000311
当层为4时，所述子带模式四面板预编码矩阵为
Figure PCTCN2019082144-appb-000312
本实施例中可选的，所述PMI包括第一PMI值和第二PMI值，其中第一PMI值与宽带的CSI对应，第二PMI值与子带的CSI对应。所述第一PMI值对应三个第一预编码矩阵索引，分别是第一水平预编码矩阵索引i 1,1、第一垂直预编码矩阵索引i 1,2和第一预编码矩阵索引差异值索引i 1,3；第二PMI值对应第二预编码矩阵索引i 2。所述子带模式四面板预编码矩阵下标l的值由第一水平预编码矩阵索引i 1,1确定；下标m的值由第一垂直预编码矩阵索引i 1,2确定；当层数大于1时，
Figure PCTCN2019082144-appb-000313
或
Figure PCTCN2019082144-appb-000314
和
Figure PCTCN2019082144-appb-000315
或
Figure PCTCN2019082144-appb-000316
中下标(l',m')和(l,m)的差异值由第一预编码矩阵索引差异值索引i 1,3确定；下标n＝[n 0 n 1 n 2 n 3]的值由第二预编码矩阵索引i 2＝[i 2,0 i 2,1 i 2,2 i 2,3]和高层信令或预定义的取值规则或预定义的固定值共同确定。根据***的层数和对应所述子带模式四面板预编码矩阵结构
Figure PCTCN2019082144-appb-000317
(或
Figure PCTCN2019082144-appb-000318
Figure PCTCN2019082144-appb-000319
)和下标(l,m,n)或者(l,l',m,m',n)的值确定所述子带模式四面板预编码矩阵。
预编码矩阵示例2：
可选的，码本中的预编码矩阵包括与天线面板一一对应的多个矩阵，多个面板对应的矩阵之间具有关联关系，所述关联关系具体包括，所述Ng个矩阵满足c x+pP,y＝a pb pβ p*c x,y，其中，c x,y为预编码矩阵中与第一面板对应的矩阵的第x行第y列的元素，c x+pP,y为预编码矩阵中第(x+pP)行第y列的元素,β p是所述可配置参数的函数，用于指示天线面板间相位差，a p、b p用于指示天线面板间相位差β p的修正值，该修正值可以由UE确定并反馈给基站，所述P为每块面板对应的CSI-RS端口数，p为[1,N g-1]中的正整数。
可选的，下文给出了预编码矩阵列向量的一种更具体的例子。
当Ng＝4时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000320
其中，
Figure PCTCN2019082144-appb-000321
Figure PCTCN2019082144-appb-000322
Figure PCTCN2019082144-appb-000323
Figure PCTCN2019082144-appb-000324
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2，
Figure PCTCN2019082144-appb-000325
Figure PCTCN2019082144-appb-000326
可选的，
Figure PCTCN2019082144-appb-000327
其中，
Figure PCTCN2019082144-appb-000328
或者，
Figure PCTCN2019082144-appb-000329
其中，
Figure PCTCN2019082144-appb-000330
该实施例中，
Figure PCTCN2019082144-appb-000331
的值仅仅是举例，还可以有其他的值。
其中，
Figure PCTCN2019082144-appb-000332
为Hadamard乘积，所述Hadamard乘积是长度为N 1N 2的矢量
Figure PCTCN2019082144-appb-000333
和长度为N 1N 2的矢量v l,m对应位置上的元素相乘。
可选的，上述预编码矩阵涉及的量可以有以下物理含义。N 1表示每个天线面板水平方向上CSI-RS端口数，N 2表示每个天线面板垂直方向上个CSI-RS端口。考虑天线阵列两个极化方向，每个天线面板对应的CSI-RS端口数为2N 1N 2。
Figure PCTCN2019082144-appb-000334
表示每个天线面板一个极化方向的预编码矩阵由长度为N 1N 2的矢量组成，其中
Figure PCTCN2019082144-appb-000335
表示垂直方向上长度为N 2的DFT波束矢量，其中O 1、O 2分别表示水平维度和垂直维度的过采样因子，l、m是预编码矩阵中水平维度和垂直维度波束索引；
Figure PCTCN2019082144-appb-000336
表示两个极化方向之间的相位差，
Figure PCTCN2019082144-appb-000337
的值可以是{1,j,-1,-j}，n 0是预编码矩阵中极化相位因子索引；
Figure PCTCN2019082144-appb-000338
表示子带的面板间相位因子，n 1、n 2、n 3是子带的相位因子索引，
Figure PCTCN2019082144-appb-000339
之间存在一种函数关系，例如线性关系；
Figure PCTCN2019082144-appb-000340
表示与天线面板间距相关的天线面板相位差参数；
Figure PCTCN2019082144-appb-000341
表示UE特定的宽带的面板间相位因子，可以由UE确定并反馈给基站，
Figure PCTCN2019082144-appb-000342
的值可以是
Figure PCTCN2019082144-appb-000343
p 1、p 2是UE特定的宽带的面板间相位因子索引。
可选的，子带的面板间相位因子
Figure PCTCN2019082144-appb-000344
中至少有一个相位因子是固定的值，或者有预先定义的取值规则，或者由TRP通过高层信令指示给UE，剩余的相位因子需要UE进行反馈，相位因子取值可以是
Figure PCTCN2019082144-appb-000345
相应的n 1和/或n 2和/或n 3是UE反馈的相位因子索引。
当待发送数据的层数为1时，所述子带模式四面板预编码矩阵为
Figure PCTCN2019082144-appb-000346
当层数为2时，所述子带模式四面板预编码矩阵为
Figure PCTCN2019082144-appb-000347
当层数为3时，所述子带模式四面板预编码矩阵为
Figure PCTCN2019082144-appb-000348
当层数为4时，所述子带模式四面板预编码矩阵为
Figure PCTCN2019082144-appb-000349
上述UE反馈的PMI可以有多种实现方式，例如：
PMI反馈方式1：所述PMI包括第一PMI值和第二PMI值，其中第一PMI值与宽带的CSI对应，第二PMI值与子带的CSI对应。所述第一PMI值对应四个第一预编码矩阵索引，分别是第一水平预编码矩阵索引i 1,1、第一垂直预编码矩阵索引i 1,2、第一预编码矩阵索引差异值索引i 1,3和第一相位因子预编码矩阵索引i 1,4；第二PMI值对应第二预编码矩阵索引i 2。所述子带模式四面板预编码矩阵的下标l的值由第一水平预编码矩阵索引i 1,1确定；下标m的值由第一垂直预编码矩阵索引i 1,2确定；层数大于1时，
Figure PCTCN2019082144-appb-000350
或
Figure PCTCN2019082144-appb-000351
和
Figure PCTCN2019082144-appb-000352
或
Figure PCTCN2019082144-appb-000353
中下标(l',m')和(l,m)的差异值由第一预编码矩阵索引差异值索引i 1,3确定；下标p＝[p 1 p 2 p 3]的值由第一相位因子预编码矩阵索引i 1,3＝[i 1,3,1 i 1,3,2 i 1,3,3]确定；下标n＝[n 0 n 1 n 2 n 3]的值由第二预编码矩阵索引i 2＝[i 2,0 i 2,1 i 2,2 i 2,3]和高层信令或预定义的取值规则或预定义的固定值共同确定。根据***的层数和对应所述宽带模式多面板预编码矩阵结构
Figure PCTCN2019082144-appb-000354
(或
Figure PCTCN2019082144-appb-000355
)和下标(l,m,n,p)或者(l,l',m,m',n,p)的值确定所述子带模式四面板预编码矩阵。
PMI反馈方式2：所述PMI包括第一PMI值、第二PMI值和第三PMI三个值，其中第一PMI值和第三PMI值与宽带的CSI对应，第二PMI值与子带的CSI对应。所述第一PMI值对应三个第一预编码矩阵索引，分别是第一水平预编码矩阵索引i 1,1、第一垂直预编码矩阵索引i 1,2和第一预编码矩阵索引差异值索引i 1,3；第二PMI值对应第二预编码矩阵索引i 2；第三PMI值对应第三预编码矩阵索引i 3。所述子带模式四面板预编码矩阵的下标l的值由第一水平预编码矩阵索引i 1,1确定；下标m的值由第一垂直预编码矩阵索引i 1,2确定；层数大于1时，
Figure PCTCN2019082144-appb-000356
或
Figure PCTCN2019082144-appb-000357
和
Figure PCTCN2019082144-appb-000358
或
Figure PCTCN2019082144-appb-000359
中下标(l',m')和(l,m)的差异值由第一预编码矩阵索引差异值索引i 1,3确定；下标n＝[n 0 n 1 n 2 n 3]的值由第二预编码矩阵索引i 2＝[i 2,0 i 2,1 i 2,2 i 2,3]和高层信令或预定义的取值规则或预定义的固定值共同确定；下标p＝[p 1 p 2 p 3]的值由第三预编码矩阵索引i 3＝[i 3,1 i 3,2 i 3,3]确定。根据***的层数和对应所述子带模式多面板预编码矩阵结构
Figure PCTCN2019082144-appb-000360
(或
Figure PCTCN2019082144-appb-000361
)和下标(l,m,n,p)或者(l,l',m,m',n,p)的值确定所述子带模式四面板预编码矩阵。
预编码矩阵示例3：
可选的，码本中的预编码矩阵包括与天线面板一一对应的多个矩阵，多个面板对应的矩阵之间具有关联关系，所述关联关系具体包括，所述Ng个矩阵满足c x+pP,y＝b pβ p*c x,y和
Figure PCTCN2019082144-appb-000362
其中，c x,y为预编码矩阵中与第一面板对应的矩阵的前
Figure PCTCN2019082144-appb-000363
行的子矩阵的第x行第y列的元素，c x+pP,y为预编码矩阵中第(x+pP)行第y列的元素,
Figure PCTCN2019082144-appb-000364
为预编码矩阵中第
Figure PCTCN2019082144-appb-000365
行第y列的元素，β p是所述可配置参数的函数，用于指示天线面板间相位差，b p、b' p用于指示天线面板间相位差β p的修正值，该修正值可以由UE确定并反馈给基站，所述P为每块面板对应的CSI-RS端口数，p为[1,N g-1]中的正整数。
可选的，下文给出了预编码矩阵列向量的一种更具体的例子。
当Ng＝4时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000366
其中，
Figure PCTCN2019082144-appb-000367
Figure PCTCN2019082144-appb-000368
Figure PCTCN2019082144-appb-000369
Figure PCTCN2019082144-appb-000370
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2，
Figure PCTCN2019082144-appb-000371
可选的，
Figure PCTCN2019082144-appb-000372
其中，
Figure PCTCN2019082144-appb-000373
或者，
Figure PCTCN2019082144-appb-000374
其中，
Figure PCTCN2019082144-appb-000375
该实施例中，
Figure PCTCN2019082144-appb-000376
的值仅仅是举例，还可以有其他的值。
其中，
Figure PCTCN2019082144-appb-000377
为Hadamard乘积，所述Hadamard乘积是长度为N 1N 2的矢量
Figure PCTCN2019082144-appb-000378
和长度为N 1N 2的矢量v l,m对应位置上的元素相乘。
可选的，上述预编码矩阵涉及的量可以有以下物理含义。N 1表示每个天线面板水平方向上CSI-RS端口数，N 2表示每个天线面板垂直方向上个CSI-RS端口。考虑天线阵列两个极化方向，每个天线面板对应的CSI-RS端口数为2N 1N 2。
Figure PCTCN2019082144-appb-000379
表示每个天线面板一个极化方向的预编码矩阵由长度为N 1N 2的矢量组成，其中
Figure PCTCN2019082144-appb-000380
表示垂直方向上长度为N 2的DFT波束矢量，其中O 1、O 2分别表示水平维度和垂直维度的过采样因子，l、m是预编码矩阵中水平维度和垂直维度波束索引；
Figure PCTCN2019082144-appb-000381
表示两个极化方向之间的相位差，
Figure PCTCN2019082144-appb-000382
的值可以是{1,j,-1,-j}，n 0是预编码矩阵中极化相位因子索引；
Figure PCTCN2019082144-appb-000383
表示子带的面板间相位因子，n 1、n 2、n 3、n 4、n 5、n 6是子带的相位因子索引，
Figure PCTCN2019082144-appb-000384
之间存在一种函数关系，例如线性关系；
Figure PCTCN2019082144-appb-000385
表示与天线面板间距相关的天线面板相位差参数。
可选的，子带的面板间相位因子
Figure PCTCN2019082144-appb-000386
中至少有一个相位因子是固定的值，或者有预先定义的取值规则，或者由TRP通过高层信令指示给UE，剩余的相位因子需要UE进行反馈，相位因子取值可以是
Figure PCTCN2019082144-appb-000387
相应的n 1和/或n 2和/或n 3和/或n 4和/或n 5和/或n 6是UE反馈的相位因子索引。
可选的，当待发送数据的层数为1时，所述子带模式四面板预编码矩阵为
Figure PCTCN2019082144-appb-000388
当层数为2时，所述子带模式四面板预编码矩阵为
Figure PCTCN2019082144-appb-000389
当层数为3时，所述子带模式四面板预编码矩阵为
Figure PCTCN2019082144-appb-000390
当层数为4时，所述子带模式四面板预编码矩阵为
Figure PCTCN2019082144-appb-000391
本实施例中可选的，所述PMI包括第一PMI值和第二PMI值，其中第一PMI值与宽带的CSI对应，第二PMI值与子带的CSI对应。所述第一PMI值对应三个第一预编码矩阵索引，分别是第一水平预编码矩阵索引i 1,1、第一垂直预编码矩阵索引i 1,2和第一预编码矩阵索引差异值索引i 1,3；第二PMI值对应第二预编码矩阵索引i 2。所述子带模式四面板预编码矩阵下标l的值由第一水平预编码矩阵索引i 1,1确定；下标m的值由第一垂直预编码矩阵索引i 1,2确定；当层数大于1时，
Figure PCTCN2019082144-appb-000392
或
Figure PCTCN2019082144-appb-000393
和
Figure PCTCN2019082144-appb-000394
或
Figure PCTCN2019082144-appb-000395
中下标(l',m')和(l,m)的差异值由第一预编码矩阵索引差异值索引i 1,3确定；下标n＝[n 0 n 1 n 2 n 3 n 4 n 5 n 6]的值由第二预编码矩阵索引i 2＝[i 2,0 i 2,1 i 2,2 i 2,3 i 2,4 i 2,5 i 2,6]和高层信令或预定义的取值规则或预定义的固定值共同确定。根据***的层数和对应所述子带模式四面板预编码矩阵结构
Figure PCTCN2019082144-appb-000396
(或
Figure PCTCN2019082144-appb-000397
)和下标(l,m,n)或者(l,l',m,m',n)的值确定所述子带模式四面板预编码矩阵。
预编码矩阵示例4：
码本中的预编码矩阵包括与天线面板一一对应的多个矩阵，多个面板对应的矩阵之间具有关联关系，所述关联关系具体包括，所述Ng个矩阵满足c x+pP,y＝a pb pβ p*c x,y和
Figure PCTCN2019082144-appb-000398
其中，c x,y为预编码矩阵中与第一面板对应的矩阵的前
Figure PCTCN2019082144-appb-000399
行的子矩阵的第x行第y列的元素，c x+P,y为预编码矩阵中第(x+P)行第y列的元素,
Figure PCTCN2019082144-appb-000400
为预编码矩阵中第
Figure PCTCN2019082144-appb-000401
行第y列的元素，β p是所述可配置参数的函数，用于指示天线面板间相位差，a p、b p、a' p、b' p用于指示天线面板间相位差β p的修正值，该修正值可以由UE确定并反馈给基站，所述P为每块面板对应的CSI-RS端口数，p为[1,N g-1]中的正整数。
可选的，下文给出了预编码矩阵列向量的一种更具体的例子。
当Ng＝4时，所述预编码矩阵的列向量为：
Figure PCTCN2019082144-appb-000402
其中，
Figure PCTCN2019082144-appb-000403
Figure PCTCN2019082144-appb-000404
Figure PCTCN2019082144-appb-000405
Figure PCTCN2019082144-appb-000406
为天线面板间相位差参数，为α k的函数，
l＝0,...,N 1O 1-1，
m＝0,...,N 2O 2-1，
N 1，N 2，O 1，O 2为正整数，由网络侧配置，
P CSI-RS＝2NgN 1N 2，
Figure PCTCN2019082144-appb-000407
Figure PCTCN2019082144-appb-000408
可选的，
Figure PCTCN2019082144-appb-000409
其中，
Figure PCTCN2019082144-appb-000410
或者，
Figure PCTCN2019082144-appb-000411
其中，
Figure PCTCN2019082144-appb-000412
该实施例中，
Figure PCTCN2019082144-appb-000413
的值仅仅是举例，还可以有其他的值。
其中，
Figure PCTCN2019082144-appb-000414
为Hadamard乘积，所述Hadamard乘积是长度为N 1N 2的矢量
Figure PCTCN2019082144-appb-000415
和长度 为N 1N 2的矢量v l,m对应位置上的元素相乘。
可选的，上述预编码矩阵涉及的量可以有以下物理含义。N 1表示每个天线面板水平方向上CSI-RS端口数，N 2表示每个天线面板垂直方向上个CSI-RS端口。考虑天线阵列两个极化方向，每个天线面板对应的CSI-RS端口数为2N 1N 2。
Figure PCTCN2019082144-appb-000416
表示每个天线面板一个极化方向的预编码矩阵由长度为N 1N 2的矢量组成，其中
Figure PCTCN2019082144-appb-000417
表示垂直方向上长度为N 2的DFT波束矢量，其中O 1、O 2分别表示水平维度和垂直维度的过采样因子，l、m是预编码矩阵中水平维度和垂直维度波束索引；
Figure PCTCN2019082144-appb-000418
表示两个极化方向之间的相位差，
Figure PCTCN2019082144-appb-000419
的值可以是{1,j,-1,-j}，n 0是预编码矩阵中极化相位因子索引；
Figure PCTCN2019082144-appb-000420
表示UE特定的宽带的面板间相位因子，该值可以由UE确定并反馈给基站，
Figure PCTCN2019082144-appb-000421
Figure PCTCN2019082144-appb-000422
的值可以是
Figure PCTCN2019082144-appb-000423
p 1、p 2、p 3、p 4、p 5、p 6是UE特定的宽带的面板间相位因子索引，可以由UE确定并反馈给基站；
Figure PCTCN2019082144-appb-000424
表示子带的面板间相位因子，n 1、n 2、n 3、n 4、n 5、n 6是子带的相位因子索引，
Figure PCTCN2019082144-appb-000425
之间存在一种函数关系，例如线性关系；
Figure PCTCN2019082144-appb-000426
表示与天线面板间距相关的天线面板相位差参数。
可选的，子带的面板间相位因子
Figure PCTCN2019082144-appb-000427
中至少有一个相位因子是固定的值，或者有预先定义的取值规则，或者由TRP通过高层信令指示给UE，剩余的相位因子需要UE进行反馈，相位因子取值可以是
Figure PCTCN2019082144-appb-000428
相应的n 1和/或n 2和/或n 3和/或n 4和/或n 5和/或n 6是UE反馈的相位因子索引。
可选的，当待发送数据的层数为1时，所述子带模式四面板预编码矩阵为
Figure PCTCN2019082144-appb-000429
当层数为2时，所述子带模式四面板预编码矩阵为
Figure PCTCN2019082144-appb-000430
当层数3时，所述子带模式四面板预编码矩阵为
Figure PCTCN2019082144-appb-000431
当层数为4时，所述子带模式四面板预编码矩阵为
Figure PCTCN2019082144-appb-000432
上述UE反馈的PMI可以有多种实现方式，例如：
PMI反馈方式1：
所述PMI包括第一PMI值和第二PMI值，其中第一PMI值与宽带的CSI对应，第二PMI值与子带的CSI对应。所述第一PMI值对应四个第一预编码矩阵索引，分别是第一水平预编码矩阵索引i 1,1、第一垂直预编码矩阵索引i 1,2、第一预编码矩阵索引差异值索引i 1,3和第一相位因子预编码矩阵索引i 1,4；第二PMI值对应第二预编码矩阵索引i 2。所述子带模式四面板预编码矩阵的下标l的值由第一水平预编码矩阵索引i 1,1确定；下标m的值由第一垂直预编码矩阵索引i 1,2确定；当层数大于1时，
Figure PCTCN2019082144-appb-000433
或
Figure PCTCN2019082144-appb-000434
和
Figure PCTCN2019082144-appb-000435
或
Figure PCTCN2019082144-appb-000436
中下标(l',m')和(l,m)的差异值由第一预编码矩阵索引差异值索引i 1,3确定；下标p＝[p 1 p 2 p 3 p 4 p 5 p 6]的值由第一相位因子预编码矩阵索引i 1,3＝[i 1,3,1 i 1,3,2 i 1,3,3 i 1,3,4 i 1,3,5 i 1,3,6]确定；下标n＝[n 0 n 1 n 2 n 3 n 4 n 5 n 6]的 值由第二预编码矩阵索引i 2＝[i 2,0 i 2,1 i 2,2 i 2,3 i 2,4 i 2,5 i 2,6]和高层信令或预定义的取值规则或预定义的固定值共同确定。根据***的层数和对应所述子带模式多面板预编码矩阵结构
Figure PCTCN2019082144-appb-000437
(或
Figure PCTCN2019082144-appb-000438
)和下标(l,m,n,p)或者(l,l',m,m',n,p)的值确定所述子带模式四面板预编码矩阵。
PMI反馈方式2：
所述PMI包括第一PMI值、第二PMI值和第三PMI值，其中第一PMI值和第三PMI值与宽带的CSI对应，第二PMI值与子带的CSI对应。所述第一PMI值对应三个第一预编码矩阵索引，分别是第一水平预编码矩阵索引i 1,1、第一垂直预编码矩阵索引i 1,2和第一预编码矩阵索引差异值索引i 1,3；第二PMI值对应第二预编码矩阵索引i 2；第三PMI值对应第三预编码矩阵索引i 3。所述子带模式四面板预编码矩阵的下标l的值由第一水平预编码矩阵索引i 1,1确定；下标m的值由第一垂直预编码矩阵索引i 12确定；当层数大于1时，
Figure PCTCN2019082144-appb-000439
或
Figure PCTCN2019082144-appb-000440
和
Figure PCTCN2019082144-appb-000441
或
Figure PCTCN2019082144-appb-000442
中下标(l',m')和(l,m)的差异值由第一预编码矩阵索引差异值索引i 1,3确定；下标n＝[n 0 n 1 n 2 n 3 n 4 n 5 n 6]的值由第二预编码矩阵索引i 2＝[i 2,0 i 2,1 i 2,2 i 2,3 i 2,4 i 2,5 i 2,6]和高层信令或预定义的取值规则或预定义的固定值共同确定；下标p＝[p 1 p 2 p 3 p 4 p 5 p 6]的值由第三预编码矩阵索引i 3＝[i 3,1 i 3,2 i 3,3 i 3,4 i 3,5 i 3,6]确定。根据***的层数和对应所述宽带模式多面板预编码矩阵结构
Figure PCTCN2019082144-appb-000443
(或
Figure PCTCN2019082144-appb-000444
)和下标(l,m,n,p)或者(l,l',m,m',n,p)的值确定所述子带模式四面板预编码矩阵。
本发明实施例进一步给出实现上述方法实施例中各步骤及方法的装置实施例。前述方法实施例的方法、步骤、技术细节以及技术效果等同样适用于装置实施例，后续不再详细说明。
图7示出一种网络设备的结构示意图，该网络设备可应用于如图1所示的***。网络设备20包括一个或多个远端射频单元(remote radio unit,RRU)701和一个或多个基带单元(baseband unit，BBU)702。RRU701可以称为收发单元、收发机、收发电路或者收发器等等，其可以包括至少一个天线7011和射频单元7012。RRU701分主要用于射频信号的收发以及射频信号与基带信号的转换，例如用于向终端发送上述实施例中的信令指示或参考信号。BBU702部分主要用于进行基带处理，对网络设备进行控制等。RRU701与BBU702可以是可以是物理上设置在一起，也可以物理上分离设置的，即分布式基站。
BBU702为网络设备的控制中心，也可以称为处理单元，主要用于完成基带处理功能，如信道编码，复用，调制，扩频等等。在一个示例中，BBU702可以由一个或多个单板构成，多个单板可以共同支持单一接入制式的无线接入网(如5G网络)，也可以分别支持不同接入制式的无线接入网。BBU702还包括存储器7021和处理器7022。存储器7021用以存储必要的指令和数据。处理器7022用于控制网络设备进行必要的动作。存储器7021和处理器7022可以服务于一个或多个单板。也就是说，可以每个单板上单独设置存储器和处理器。也可以是多个单板公用相同的存储器和处理器。此外每个单板上还设置有必要的电路。
上述网络设备可以用于实现前述方法实施例的方法，具体的：
发送器，用于向用户设备发送第一配置信息，所述第一配置信息指示天线面板间距或天线面板第一相位差。
接收器，用于接收所述用户设备根据所述天线面板间距或者天线面板第一相位差确定的预编码矩阵指示PMI。
可选的，所述接收器，还用于接收所述用户设备反馈的第一指示信息，所述第一指示信息指示所述天线面板第一相位差修正值。
可选的，处理器，用于根据上述第一配置信息确定出预编码矩阵。
可选的，处理器，还用于根据上述PMI确定出预编码矩阵中的一个矩阵或向量。
预编码矩阵的具体形式以及PMI反馈方式等，可参考前文方法实施例，此处不再赘述。
图8提供了一种终端的结构示意图。该终端可适用于图1所示出的***中。为了便于说明， 图8仅示出了终端的主要部件。如图8所示，终端10包括处理器、存储器、控制电路或天线以及输入输出装置。处理器主要用于对通信协议以及通信数据进行处理，以及对整个终端进行控制，执行软件程序，处理软件程序的数据。存储器主要用于存储软件程序和数据，例如存储上述实施例中所描述的码本。控制电路主要用于基带信号与射频信号的转换以及对射频信号的处理。控制电路和天线一起也可以叫做收发器，主要用于收发电磁波形式的射频信号。具输入输出装置，例如触摸屏、显示屏或键盘等主要用于接收用户输入的数据以及对用户输出数据。
当终端开机后，处理器可以读取存储单元中的软件程序，解释并执行软件程序的指令，处理软件程序的数据。当需要通过无线发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。
本领域技术人员可以理解，为了便于说明，图8仅示出了一个存储器和处理器。在实际的终端中，可以存在多个处理器和存储器。存储器也可以称为存储介质或者存储设备等，本发明实施例对此不做限制。
作为一种可选的实现方式，处理器可以包括基带处理器和中央处理器，基带处理器主要用于对通信协议以及通信数据进行处理，中央处理器主要用于对整个终端进行控制，执行软件程序，处理软件程序的数据。图8中的处理器集成了基带处理器和中央处理器的功能，本领域技术人员可以理解，基带处理器和中央处理器也可以是各自独立的处理器，通过总线等技术互联。本领域技术人员可以理解，终端可以包括多个基带处理器以适应不同的网络制式，终端可以包括多个中央处理器以增强其处理能力，终端的各个部件可以通过各种总线连接。基带处理器也可以表述为基带处理电路或者基带处理芯片。中央处理器也可以表述为中央处理电路或者中央处理芯片。对通信协议以及通信数据进行处理的功能可以内置在处理器中，也可以以软件程序的形式存储在存储单元中，由处理器执行软件程序以实现基带处理功能。
示例性的，在发明实施例中，可以将具有收发功能的天线和控制电路视为终端10的收发单元801，将具有处理功能的处理器视为终端10的处理单元802。如图8所示，终端10包括收发单元801和处理单元802。收发单元也可以称为收发器、收发机或收发装置等。可选的，可以将收发单元801中用于实现接收功能的器件视为接收单元，将收发单元801中用于实现发送功能的器件视为发送单元，即收发单元801包括接收单元和发送单元示例性的，接收单元也可以称为接收机、接收器或接收电路等，发送单元可以称为发射机、发射器或者发射电路等。
上述终端可以用于实现前述方法实施例中的方法，具体的：
接收器，用于接收网络设备发送的第一配置信息，所述第一配置信息指示天线面板间距或者天线面板第一相位差；
发送器，用于向所述网络设备发送所述用户设备根据所述天线面板间距或者天线面板第一相位差确定的预编码矩阵指示PMI。
可选的，所述发送器，还用于向所述网络设备发送第一指示信息，所述第一指示信息指示所述天线面板第一相位差修正值。
本实施例中，用户设备根据上述第一配置信息确定出预编码矩阵，并确定出PMI以指示预编码矩阵中的一个矩阵或向量。
预编码矩阵的具体形式以及PMI反馈方式等，可参考前文方法实施例，此处不再赘述。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本发明实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘Solid State Disk(SSD))等。

Claims (36)

  1. 一种确定预编码矩阵的方法，其特征在于，包括：
    网络设备向用户设备发送第一配置信息，所述第一配置信息指示天线面板间距或者天线面板第一相位差；
    所述网络设备接收所述用户设备根据所述天线面板间距或者天线面板第一相位差确定的预编码矩阵指示PMI。
  2. 根据权利要求1所述的方法，其特征在于，所述第一天线面板相位差为所述天线面板间距的函数。
  3. 根据权利要求1或2所述的方法，其特征在于，所述预编码矩阵包括与所述天线面板对应的Ng个矩阵，所述Ng个矩阵满足c x+pP,y＝β p*c x,y，其中，c x,y为预编码矩阵中与第一天线面板对应的矩阵的第x行第y列的元素，c x+pP,y为预编码矩阵中第(x+pP)行第y列的元素，β p指示天线面板第二相位差，所述天线面板第二相位差为所述天线面板间距或者所述天线面板第一相位差的函数，所述P为一个天线面板的CSI-RS端口数，p为整数且1≤p≤Ng-1，Ng为天线面板数量。
  4. 根据权利要求1或2所述的方法，其特征在于，所述预编码矩阵包括与所述天线面板对应的Ng个矩阵，所述Ng个矩阵满足c x+pP,y＝a pb pβ p*c x,y，
    Figure PCTCN2019082144-appb-100001
    其中，c x,y为预编码矩阵中与第一天线面板对应的矩阵的前
    Figure PCTCN2019082144-appb-100002
    行的子矩阵的第x行第y列的元素，c x+pP,y为预编码矩阵中第(x+pP)行第y列的元素,
    Figure PCTCN2019082144-appb-100003
    为预编码矩阵中第
    Figure PCTCN2019082144-appb-100004
    行第y列的元素，β p指示天线面板第三相位差，所述天线面板第三相位差是所述天线面板间距或者所述天线面板第一相位差的函数，a p、b p、a' p、b' p为β p的修正值，所述P为一个天线面板的CSI-RS端口数，p为整数且1≤p≤Ng-1，Ng为天线面板数量。
  5. 根据权利要求1所述的方法，其特征在于，所述第一配置信息指示所述天线面板第一相位差
    Figure PCTCN2019082144-appb-100005
    Ng为天线面板数量。
  6. 根据权利要求5所述的方法，其特征在于，当Ng＝2时，所述预编码矩阵的列向量为：
    Figure PCTCN2019082144-appb-100006
    其中，
    Figure PCTCN2019082144-appb-100007
    n∈{0,1,2,3}，
    Figure PCTCN2019082144-appb-100008
    Figure PCTCN2019082144-appb-100009
    Figure PCTCN2019082144-appb-100010
    为天线面板间相位差参数，为α k的函数，
    l＝0,...,N 1O 1-1，
    m＝0,...,N 2O 2-1，
    N 1，N 2，O 1，O 2为正整数，由网络侧配置，
    P CSI-RS＝2NgN 1N 2。
  7. 根据权利要求5所述的方法，其特征在于，所述方法还包括：
    所述网络设备接收所述用户设备发送的第一指示信息，所述第一指示信息指示所述天线面板第一相位差修正值δ p，其中，
    Figure PCTCN2019082144-appb-100011
  8. 根据权利要求7所述的方法，其特征在于，当Ng＝2时，所述预编码矩阵的列向量为：
    Figure PCTCN2019082144-appb-100012
    其中，
    Figure PCTCN2019082144-appb-100013
    n∈{0,1,2,3}，
    Figure PCTCN2019082144-appb-100014
    Figure PCTCN2019082144-appb-100015
    Figure PCTCN2019082144-appb-100016
    为天线面板间相位差参数，为α k的函数，
    l＝0,...,N 1O 1-1，
    m＝0,...,N 2O 2-1，
    N 1，N 2，O 1，O 2为正整数，由网络侧配置，
    P CSI-RS＝2NgN 1N 2。
  9. 一种确定预编码矩阵的方法，其特征在于，包括：
    用户设备接收网络设备发送的第一配置信息，所述第一配置信息指示天线面板间距或者天线面板第一相位差；
    所述用户设备向所述网络设备发送根据所述天线面板间距或者天线面板第一相位差确定的预编码矩阵指示PMI。
  10. 根据权利要求9所述的方法，其特征在于，所述第一天线面板相位差为所述天线面板间距的函数。
  11. 根据权利要求9或10所述的方法，其特征在于，所述预编码矩阵包括与所述天线面板对应的Ng个矩阵，所述Ng个矩阵满足c x+pP,y＝β p*c x,y，其中，c x,y为预编码矩阵中与第一天线面板对应的矩阵的第x行第y列的元素，c x+pP,y为预编码矩阵中第(x+pP)行第y列的元素，β p指示天线面板第二相位差，所述天线面板第二相位差是所述天线面板间距或者所述天线面板第一相位差的函数，所述P为一个天线面板的CSI-RS端口数，p为整数且1≤p≤Ng-1，Ng为天线面板数量。
  12. 根据权利要求9或10所述的方法，其特征在于，所述预编码矩阵包括与所述天线面板对应的Ng个矩阵，所述Ng个矩阵满足c x+pP,y＝a pb pβ p*c x,y，
    Figure PCTCN2019082144-appb-100017
    其中，c x,y为预编码矩阵中与第一天线面板对应的矩阵的前
    Figure PCTCN2019082144-appb-100018
    行的子矩阵的第x行第y列的元素，c x+pP,y为预编码矩阵中第(x+pP)行第y列的元素,
    Figure PCTCN2019082144-appb-100019
    为预编码矩阵中第
    Figure PCTCN2019082144-appb-100020
    行第y列的元素，β p指示天线面板第三相位差，所述天线面板第三相位差是所述天线面板间距或者所述天线面板第一相位差的函数，a p、b p、a' p、b' p为β p的修正值，所述P为一个天线面板的CSI-RS端口数，p为整数且1≤p≤Ng-1，Ng为天线面板数量。
  13. 根据权利要求9所述的方法，其特征在于，所述第一配置信息指示所述天线面板第一相位差
    Figure PCTCN2019082144-appb-100021
    Ng为天线面板数量。
  14. 根据权利要求13所述的方法，其特征在于，当Ng＝2时，所述预编码矩阵的列向量为：
    Figure PCTCN2019082144-appb-100022
    其中，
    Figure PCTCN2019082144-appb-100023
    n∈{0,1,2,3}，
    Figure PCTCN2019082144-appb-100024
    Figure PCTCN2019082144-appb-100025
    Figure PCTCN2019082144-appb-100026
    为天线面板间相位差参数，为α k的函数，
    l＝0,...,N 1O 1-1，
    m＝0,...,N 2O 2-1，
    N 1，N 2，O 1，O 2为正整数，由网络侧配置，
    P CSI-RS＝2NgN 1N 2。
  15. 根据权利要求13所述的方法，其特征在于，所述方法还包括：
    所述用户设备向所述网络设备发送第一指示信息，所述第一指示信息指示所述天线面板第一相位差修正值δ p，其中，
    Figure PCTCN2019082144-appb-100027
  16. 根据权利要求15所述的方法，其特征在于，当Ng＝2时，所述预编码矩阵的列向量为：
    Figure PCTCN2019082144-appb-100028
    其中，
    Figure PCTCN2019082144-appb-100029
    n∈{0,1,2,3}，
    Figure PCTCN2019082144-appb-100030
    Figure PCTCN2019082144-appb-100031
    Figure PCTCN2019082144-appb-100032
    为天线面板间相位差参数，为α k的函数，
    l＝0,...,N 1O 1-1，
    m＝0,...,N 2O 2-1，
    N 1，N 2，O 1，O 2为正整数，由网络侧配置，
    P CSI-RS＝2NgN 1N 2。
  17. 一种网络设备，其特征在于，包括发送器和接收器：
    所述发送器，用于向用户设备发送第一配置信息，所述第一配置信息指示天线面板间距或者天线面板第一相位差；
    所述接收器，用于接收所述用户设备根据所述天线面板间距或者天线面板第一相位差确定的预编码矩阵指示PMI。
  18. 根据权利要求17所述的网络设备，其特征在于，所述第一天线面板相位差为所述天线面板间距的函数。
  19. 根据权利要求17或18所述的网络设备，其特征在于，所述预编码矩阵包括与所述天线面板对应的Ng个矩阵，所述Ng个矩阵满足c x+pP,y＝β p*c x,y，其中，c x,y为预编码矩阵中与第一天线面板对应的矩阵的第x行第y列的元素，c x+pP,y为预编码矩阵中第(x+pP)行第y列的元素，β p指示天线面板第二相位差，所述天线面板第二相位差是所述天线面板间距或者所述天线面板第一相位差的函数，所述P为一个天线面板的CSI-RS端口数，p为整数且1≤p≤Ng-1，Ng为天线面板数量。
  20. 根据权利要求17或18所述的网络设备，其特征在于，所述预编码矩阵包括与所述天线面板对应的Ng个矩阵，所述Ng个矩阵满足c x+pP,y＝a pb pβ p*c x,y，
    Figure PCTCN2019082144-appb-100033
    其中，c x,y为预编码矩阵中与第一天线面板对应的矩阵的前
    Figure PCTCN2019082144-appb-100034
    行的子矩阵的第x行第y列的元素，c x+pP,y为预编码矩阵中第(x+pP)行第y列的元素,
    Figure PCTCN2019082144-appb-100035
    为预编码矩阵中第
    Figure PCTCN2019082144-appb-100036
    行第y列的元素，β p指示天线面板第三相位差，所述天线面板第三相位差是所述天线面板间距或者所述天线面板第一相位差的函数，a p、b p、a' p、b' p为β p的修正值，所述P为一个天线面板的CSI-RS端口数，p为整数且1≤p≤Ng-1，Ng为天线面板数量。
  21. 根据权利要求17所述的网络设备，其特征在于，所述第一配置信息指示所述天线面板第一相位差
    Figure PCTCN2019082144-appb-100037
    Ng为天线面板数量。
  22. 根据权利要求21所述的网络设备，其特征在于，当Ng＝2时，所述预编码矩阵的列向量为：
    Figure PCTCN2019082144-appb-100038
    其中，
    Figure PCTCN2019082144-appb-100039
    n∈{0,1,2,3}，
    Figure PCTCN2019082144-appb-100040
    Figure PCTCN2019082144-appb-100041
    Figure PCTCN2019082144-appb-100042
    为天线面板间相位差参数，为α k的函数，
    l＝0,...,N 1O 1-1，
    m＝0,...,N 2O 2-1，
    N 1，N 2，O 1，O 2为正整数，由网络侧配置，
    P CSI-RS＝2NgN 1N 2。
  23. 根据权利要求21所述的网络设备，其特征在于：
    所述接收器，还用于接收所述用户设备发送的第一指示信息，所述第一指示信息指示所述天线面板第一相位差修正值δ p，其中，
    Figure PCTCN2019082144-appb-100043
  24. 根据权利要求23所述的方法，其特征在于，当Ng＝2时，所述预编码矩阵的列向量为：
    Figure PCTCN2019082144-appb-100044
    其中，
    Figure PCTCN2019082144-appb-100045
    n∈{0,1,2,3}，
    Figure PCTCN2019082144-appb-100046
    Figure PCTCN2019082144-appb-100047
    Figure PCTCN2019082144-appb-100048
    为天线面板间相位差参数，为α k的函数，
    l＝0,...,N 1O 1-1，
    m＝0,...,N 2O 2-1，
    N 1，N 2，O 1，O 2为正整数，由网络侧配置，
    P CSI-RS＝2NgN 1N 2。
  25. 一种用户设备，其特征在于，包括接收器和发送器：
    所述接收器，用于接收网络设备发送的第一配置信息，所述第一配置信息指示天线面板间距或者天线面板第一相位差；
    所述发送器，用于向所述网络设备发送根据所述天线面板间距或者天线面板第一相位差确定的预编码矩阵指示PMI。
  26. 根据权利要求25所述的用户设备，其特征在于，所述第一天线面板相位差为所述天线面板间距的函数。
  27. 根据权利要求25或26所述的用户设备，其特征在于，所述预编码矩阵包括与所述天线面板对应的Ng个矩阵，所述Ng个矩阵满足c x+pP,y＝β p*c x,y，其中，c x,y为预编码矩阵中与第一天线面板对应的矩阵的第x行第y列的元素，c x+pP,y为预编码矩阵中第(x+pP)行第y列的元素，β p指示天线面板第二相位差，所述天线面板第二相位差是所述天线面板间距或者所述天线面板第一相位差的函数，所述P为一个天线面板的CSI-RS端口数，p为整数且1≤p≤Ng-1，Ng为天线面板数量。
  28. 根据权利要求25或26所述的用户设备，其特征在于，所述预编码矩阵包括与所述天线面板对应的Ng个矩阵，所述Ng个矩阵满足c x+pP,y＝a pb pβ p*c x,y，
    Figure PCTCN2019082144-appb-100049
    其中，c x,y为预编码矩阵中与第一天线面板对应的矩阵的前
    Figure PCTCN2019082144-appb-100050
    行的子矩阵的第x行第y列的元素，c x+pP,y为预编码矩阵中第(x+pP)行第y列的元素,
    Figure PCTCN2019082144-appb-100051
    为预编码矩阵中第
    Figure PCTCN2019082144-appb-100052
    行第y列的元素，β p指示天线面板第三相位差，所述天线面板第三相位差是所述天线面板间距或者所述天线面板第一相位差的函数，a p、b p、a' p、b' p为β p的修正值，所述P为一个天线面板的CSI-RS端口数，p为整数 且1≤p≤Ng-1，Ng为天线面板数量。
  29. 根据权利要求25所述的用户设备，其特征在于，所述第一配置信息指示所述天线面板第一相位差
    Figure PCTCN2019082144-appb-100053
    Ng为天线面板数量。
  30. 根据权利要求29所述的用户设备，其特征在于，当Ng＝2时，所述预编码矩阵的列向量为：
    Figure PCTCN2019082144-appb-100054
    其中，
    Figure PCTCN2019082144-appb-100055
    n∈{0,1,2,3}，
    Figure PCTCN2019082144-appb-100056
    Figure PCTCN2019082144-appb-100057
    为天线面板间相位差参数，为α k的函数，
    l＝0,...,N 1O 1-1，
    m＝0,...,N 2O 2-1，
    N 1，N 2，O 1，O 2为正整数，由网络侧配置，
    P CSI-RS＝2NgN 1N 2。
  31. 根据权利要求29所述的用户设备，其特征在于：
    所述发送器，还用于向所述网络设备发送第一指示信息，所述第一指示信息指示所述天线面板第一相位差修正值δ p，其中，
    Figure PCTCN2019082144-appb-100059
  32. 根据权利要求31所述的用户设备，其特征在于，当Ng＝2时，所述预编码矩阵的列向量为：
    Figure PCTCN2019082144-appb-100060
    其中，
    Figure PCTCN2019082144-appb-100061
    n∈{0,1,2,3}，
    Figure PCTCN2019082144-appb-100062
    Figure PCTCN2019082144-appb-100063
    Figure PCTCN2019082144-appb-100064
    为天线面板间相位差参数，为α k的函数，
    l＝0,...,N 1O 1-1，
    m＝0,...,N 2O 2-1，
    N 1，N 2，O 1，O 2为正整数，由网络侧配置，
    P CSI-RS＝2NgN 1N 2。
  33. 一种计算机可读存储介质，包含指令，当其在计算机上运行时，使得计算机执行如权利要求1-8任一项所涉及的方法。
  34. 一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行如权利要求1-8任一项所涉及的方法。
  35. 一种计算机可读存储介质，包含指令，当其在计算机上运行时，使得计算机执行如权利要求9-16任一项所涉及的方法。
  36. 一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行如权利要求9-16任一项所涉及的方法。
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