WO2015149250A1 - 码书确定装置、信息反馈装置和通信*** - Google Patents
码书确定装置、信息反馈装置和通信*** Download PDFInfo
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- WO2015149250A1 WO2015149250A1 PCT/CN2014/074457 CN2014074457W WO2015149250A1 WO 2015149250 A1 WO2015149250 A1 WO 2015149250A1 CN 2014074457 W CN2014074457 W CN 2014074457W WO 2015149250 A1 WO2015149250 A1 WO 2015149250A1
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- codebook
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- particles
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- 238000004891 communication Methods 0.000 title claims abstract description 23
- 239000002245 particle Substances 0.000 claims abstract description 245
- 239000013598 vector Substances 0.000 claims description 43
- 230000010363 phase shift Effects 0.000 claims description 26
- 230000010287 polarization Effects 0.000 claims description 25
- 238000003491 array Methods 0.000 claims description 6
- 125000004122 cyclic group Chemical group 0.000 claims description 2
- 238000000034 method Methods 0.000 description 37
- 238000010586 diagram Methods 0.000 description 22
- 230000006870 function Effects 0.000 description 13
- 230000005540 biological transmission Effects 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 7
- 230000011664 signaling Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 238000005388 cross polarization Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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- 230000008054 signal transmission Effects 0.000 description 1
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Classifications
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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
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
- H04B7/0478—Special codebook structures directed to feedback optimisation
-
- 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
Definitions
- Codebook determining device information feedback device and communication system
- the present invention relates to the field of communications, and in particular, to a codebook determining apparatus, an information feedback apparatus, and a communication system. Background technique
- MIMO Multiple Input Multiple Output
- LTE-Advanced Enhanced Long Term Evolution
- MIMO technology uses a horizontally placed one-dimensional (1D) linear array with adaptive capability on a horizontal plane, namely two-dimensional (2D) MIMO technology.
- 2D MIMO technology uses a 2D planar array with the Active Antenna System (AAS) technology, to provide adaptive control in both horizontal and elevation dimensions to improve system performance.
- AAS Active Antenna System
- Figure 1 and Figure 2 show two common planar array structures.
- Figure 1 is a schematic diagram of a cross-polarized two-dimensional planar array.
- Figure 2 is a schematic diagram of a uniform linear two-dimensional planar array.
- M cross-polarized antenna pairs are placed in each column in the vertical direction, and N columns of cross-polarized antenna pairs are placed in the horizontal direction.
- M antenna arrays of the same polarization direction (such as the vertically polarized antenna in Fig. 2) are placed in each column in the vertical direction, and N columns are placed in the horizontal direction.
- the overhead of the reference signal also increases.
- multiple antenna elements in the vertical direction can be virtualized into one antenna port to transmit the same reference signal.
- the beam direction in the vertical direction is adjusted by weighting a plurality of antenna particles.
- the weighting of the antenna port is a precoding operation in the conventional sense.
- the 3D MIMO system is degraded into a 1D horizontal array system, so that the LTE system can use an existing codebook (such as a horizontal codebook of the previous version protocol).
- an existing codebook such as a horizontal codebook of the previous version protocol.
- the existing codebook will not be used directly, and the codebook suitable for the antenna configuration needs to be re-determined.
- Embodiments of the present invention provide a codebook determining apparatus, an information feedback apparatus, and a communication system, and a codebook determined by the apparatus is suitable for a two-dimensional planar antenna array having any plurality of antenna ports including antenna elements.
- a codebook determining apparatus including:
- a codebook determining unit configured to determine a first codebook set formed by antenna particle weighting, and/or a second codebook set formed by antenna port weighting
- the first codebook set is determined by the following formula (1):
- the second codebook set is determined using the following formula (2):
- the wavelength of the electromagnetic wave is expressed; the pitch of the antenna particles in the vertical direction; the number of antenna particles of one antenna port formed in the vertical direction, which is a positive integer greater than zero;
- an information feedback apparatus comprising:
- An information determining unit configured to determine, according to the predicted number of antenna particles of each antenna port, the first codebook set formed by weighting the antenna particles, and/or the second codebook set formed by antenna port weighting Antenna particle weighted information and/or antenna port weighted information fed back to the base station;
- a feedback unit configured to feed back information of antenna particle weighting and/or antenna port weighting to the base station.
- a communication system including a base station, where the communication
- the system further includes a user equipment, the user equipment, according to the predicted number of antenna particles of each antenna port, the first codebook set formed by weighting the antenna particles, and/or the second codebook set by the antenna port weighting, to the base station Feedback antenna particle weighted information and/or antenna port weighted information.
- an advantageous effect of embodiments of the present invention is that the codebook determined by the above embodiment is suitable for a two-dimensional planar antenna array having any plurality of antenna ports including antenna elements.
- Figure 1 is a schematic diagram of a cross-polarized two-dimensional planar array structure
- FIG. 2 is a schematic diagram of a uniform linear two-dimensional planar array structure
- FIG. 3 is a schematic diagram of a phase shift vector, antenna particle weighting, and antenna port weighting caused by a position in the case where two antenna ports are vertically arranged;
- Figure 5 is a block diagram showing the structure of a codebook determining apparatus according to Embodiment 4 of the present invention.
- FIG. 6 is a schematic diagram showing the structure of a base station according to Embodiment 5 of the present invention.
- Figure 7 is a block diagram showing the structure of a communication system according to Embodiment 6 of the present invention.
- FIG. 8 is a schematic structural diagram of a user equipment according to Embodiment 6 of the present invention.
- FIG. 9 is a flowchart of an information feedback method according to Embodiment 7 of the present invention.
- Figure 10 is a block diagram showing the structure of an information feedback apparatus according to Embodiment 8 of the present invention.
- FIG. 11 is a schematic structural diagram of a user equipment according to Embodiment 9 of the present invention.
- Figure 12 is a block diagram showing the structure of an information feedback apparatus according to Embodiment 10 of the present invention.
- Figure 13 is a block diagram showing the structure of a base station according to Embodiment 11 of the present invention. detailed description
- embodiments of the present invention provide a codebook determining method, a device thereof, an information feedback method, a device thereof, and a communication system.
- the code determined by the codebook determining method of the embodiment of the present invention can be applied to a two-dimensional planar antenna array having any number of antenna ports including a plurality of antenna elements.
- Fig. 4 is a flow chart showing the method of determining a codebook according to the first embodiment of the present invention. As shown in FIG. 4, the method includes: Step 401: The base station determines a first codebook set formed by antenna particle weighting, and/or a second codebook set formed by antenna port weighting.
- the first codebook set can be determined by using the following formula (1):
- the second codebook ⁇ A formed by the weight of the antenna port can be determined by the following formula (2).
- the wavelength of the electromagnetic wave is expressed; the pitch of the antenna particles in the vertical direction; the number of antenna particles of one antenna port formed in the vertical direction, which is a positive integer greater than zero;
- the index of the antenna particle that constitutes an antenna port in the vertical direction is [1, K], which is the size of the codebook formed by weighting the antenna particles, indicating that the codeword used is at the antenna.
- the polarization directions of the same column antenna particles may be the same or different.
- the formula (1) can determine a set of codebooks, that is, each value corresponds to a set of codebooks.
- the codebook sizes corresponding to each value may be the same or different.
- the formula ( 2 ) can determine a set of codebook sets, that is, each M value corresponds to a set of codebooks.
- the codebook sizes ⁇ corresponding to each M value may be the same or different.
- the formula (2) can determine a set of codebooks, that is, each value corresponds to a set of codebooks.
- the corresponding second codebook set is:
- the codebook sizes corresponding to each threshold may be the same or different.
- both the first codebook set and the second codebook set are related to the number of antenna particles, and weighting the antenna particles affects the number of vectors in the first codebook set, and for the second codebook set. , affects the specific value in the ⁇ expression.
- the antenna particle weighting and the antenna port weighted codebook have the same fineness, when 2 , the antenna particle weighting can be
- the codebook weighted by the antenna port is divided more finely, and V l 2 can be divided, that is, the antenna port weight is more finely divided than the antenna particle weighted codebook.
- the codebook of any antenna port of the planar antenna array can be determined by the foregoing method, which solves the problems in the prior art, and can also be applied to various situations, such as the same polarization, different polarizations, and multiple Rank transmission, multi-column antenna, etc.
- the foregoing codebook set may be generated by the base station and may be stored, and may further notify the user equipment, so that the user equipment feeds back relevant information to the base station according to the foregoing codebook set.
- the method may further include: Step 402: Notify the user equipment of the determined first codebook set and/or the second codebook set.
- the foregoing codebook set may be transmitted through any existing signaling or newly established signaling.
- the user equipment may be notified by dynamic signaling or semi-static manner.
- the step 402 is an optional step.
- the value of the pitch of the antenna particles may be small, such as
- the beamforming technique can be used to concentrate the energy of the transmitted signal at a specific position, but the pitch of the antenna particles is not limited to the above values.
- the adjustment factor "in the formula (2) may be equal to 1, But not limited to the value.
- the adjustment factor is the first phase shift factor
- the adjustment factor when the rank is equal to 1, for one or more antenna arrays in the vertical direction, for the first column antenna, the adjustment factor is a first adjustment factor, and when the same column antenna particles have the same polarization direction, The first adjustment factor may be 1; when the same column of antenna particles has different polarization directions, the first adjustment factor may be the first phase shift factor; for other column antennas other than the first column antenna, the adjustment factor is a second adjustment factor, when each column of antenna particles has the same polarization direction, the second adjustment factor may be a second phase shift factor or a complex number; when each column of antenna particles has different polarization directions, the second adjustment factor may be The product of the first phase shift factor and the second phase shift factor or complex.
- the second phase shift factor or complex may be weighted for the antenna port in the horizontal direction, but is not limited to this case.
- the second adjustment factors of the different column antennas may be the same or different.
- the codebook set by the antenna port weight obtained when the rank is equal to 1 can be used to determine the code formed by the antenna port weight when the rank is greater than 1.
- the book set for example, may be pre-coded with a rank of 2 or more in a manner determined by a householder transform or an eight-antenna pre-coded multi-rank transport codeword in LTE Release 10.
- the codebook set formed by the antenna packet weighting and the antenna port weighting can be determined by the above method, and the codebook set can be applied to any antenna port having any antenna particles.
- Two-dimensional planar antenna array such as one or more antenna ports, a column of co-polarized antenna configurations in the vertical direction, and a cross-polarized antenna configuration in the same column of antenna particles with different polarization directions, vertical
- a multi-column antenna array of directions is also applicable to the case where the transmission rank is equal to 1 or greater than 1.
- a plurality of antenna elements in the vertical direction can be virtualized into one antenna port.
- antenna particles in the same polarization direction form an antenna port, and there are a total of M antenna ports in the vertical direction, and a total of N antenna ports in the horizontal direction.
- phase shift vectors of the MK antenna particles in the same polarization direction due to the placement position are:
- the vector of all antenna particle weightings is:
- W-[w 1 , v 2 ,---, v / ,---, v Mf f , w,(l 1,2,- --,MK); where W/ denotes the antenna element Antenna particle weighting vector;
- the antenna port weighting that is, the precoding vector when the rank is 1:
- the weighting vectors composed of the antenna elements of the respective antenna ports may be the same, that is,
- FIG. 3 shows the phase shift vector and the antenna particle weight vector caused by the position of the antenna particles in the case of two antenna ports in the vertical direction.
- phase shift vector of each antenna particle due to the placement position can be expressed as: In equation (3), the angle of departure from the elevation angle, the meaning of the same symbols as in equations (1) and (2) is not explained here.
- ⁇ represents an electronic downtilt angle
- 0 represents a vertical angle to the antenna array; wherein, in the art, an angle at which the antenna is physically tilted is referred to as a mechanical downtilt angle, and the weight can also be adjusted.
- the mechanical downtilt is similar in effect and, therefore, is referred to as the electronic downtilt.
- the antenna particle weighting with the above form is matched with the position vector in the form of a Discrete Fourier Transform (DFT) vector, and the formula (4) can also be expressed as:
- DFT Discrete Fourier Transform
- the set of codebooks formed by the weighting of the antenna particles can be obtained by the formula (4) or (5).
- the size of the codebook formed by weighting the antenna particles "1 indicates the index of the codeword used in the antenna particle codebook set.
- a series of codebook sets determined by equation (5) The codebook sizes corresponding to each possible threshold may be the same or different.
- the adjustment factor in equation (2) is equal to 1.
- the antenna array factor is: AF
- the phase shift vector is an exponential form, and therefore, further, /: - two, using the above relationship, the array According to the above matrix factor, the antenna particle weighting and the antenna port weighting are both the phase shifting direction of the antenna particles.
- the DFT form is used to represent antenna port weighting (precoding).
- the codebook set formed by the antenna port weighting can be obtained by the formula (8) or (9).
- ⁇ is the size of the codebook formed by weighting the antenna port
- 2 represents the index of the codeword used in the codebook set.
- the codebook sizes corresponding to each possible M value may be the same or different.
- N n N 2 may be a power of 2, 8, 16, 64, 64, 128, or a power of 2.
- the process of obtaining the first codebook set and the second codebook set is as follows, the first codebook and the second codebook are both related to a position vector, and an elevation angle in the position vector is from 0- 2 Uniform quantization, using 2 ⁇ 3 ⁇ 4/ ⁇ 1 or 2 ⁇ 2 / ⁇ to represent the quantized value, where the value is 0 to ⁇ 1 _ 1, " The value of 2 is
- the weight vectors composed of the antenna elements of the respective antenna ports are the same, but the application of the first codebook set and the second codebook set determined by the above method is not limited by this assumption.
- the case where the weighting vectors composed of the antenna elements of the respective antenna ports are different, and the case of the multi-column vertical antennas and the different polarization directions can be determined by the adjustment factor based on the above results.
- Example 3 The above description is made by taking the weight of the vertical antenna port in the same polarization direction as an example, and is applied to the transmission case where the rank is equal to 1. The following describes the case of multi-column vertical antennas, different polarization directions in the same column, and multi-rank transmission.
- Example 3 The above description is made by taking the weight of the vertical antenna port in the same polarization direction as an example, and is applied to the transmission case where the rank is equal to 1. The following describes the case of multi-column vertical antennas, different polarization directions in the same column, and multi-rank transmission. Example 3
- the adjustment factor is the first phase shift factor
- the first phase shift factor can be: Value can be arbitrary, for example, take The power of 2, such as 2, 4, 8, 16, 32, 64, etc., but may not be a power of 2.
- the introduction of the first phase shift factor may cause the above formula (2) to have different representations.
- the antenna port weight composed of two cross-polarization direction antennas in the same column may be represented as a single codebook structure. , such as Lu u ' eu ”; can also be expressed as a dual codebook structure, similar to the eight-antenna precoded dual codebook structure in LTE Release 10; for example,
- the unit of dimension of 0 is listed as: 2.
- the polarization directions of the antenna elements of each column may be the same or different.
- the antenna port weighting may be determined by using the method described in Embodiment 2; for other column antennas, an adjustment factor may be multiplied by the weight of the first column antenna port as a whole; wherein, the adjustment The factor may be a second phase shift factor or a complex number, for example, the second phase shift factor or complex number may be an antenna port weight in the horizontal direction, such as a weight value of a current 2 antenna, 4 antenna or 8 antenna codebook that can be used by the LTE system. .
- the antenna port weighting may be determined by using the method in the above “1” in the embodiment; for other column antennas, an adjustment factor may be obtained by multiplying the first column antenna port weighting by the whole.
- the adjustment factor may be obtained by multiplying the second phase shift factor or the complex number by the first phase shift factor.
- the adjustment factors used may be the same or different for the other column antennas other than the first column. 3. Perform multi-rank transmission, ie rank greater than 1:
- the codebook set formed by the antenna port weights obtained when the rank is equal to 1 can be used to determine the codebook set formed by the antenna port weights when the rank is greater than 1.
- the rank determined by the equation (11) of Embodiment 2 and/or the "1" and/or "2" of the present embodiment can be utilized.
- the antenna port weighting codeword of 1 obtains a precoding codebook of rank 2 or more by a householder transform or an eight antenna precoding multi-rank transmission codeword determining method in LTE Rel-10.
- Fig. 5 is a block diagram showing the structure of a codebook determining apparatus according to a fourth embodiment of the present invention.
- the apparatus 500 includes: a codebook determining unit 501, which is configured to determine a first codebook set formed by antenna particle weighting, and/or a second codebook set formed by antenna port weighting.
- the first codebook set and the second codebook set are determined by using equations (1) and (2) described in Embodiment 1, respectively.
- the apparatus 500 may further include a notification unit 502, and the notification unit 502 is configured to notify the user equipment of the determined first codebook set and the second codebook set.
- the specific notification manner is as described in Embodiment 1, and details are not described herein again.
- the component notification unit 502 is an optional component.
- the first codebook set and the second codebook set may be determined by the codebook determining unit 501, and the codebook set may be separately determined by different components, such that the codebook determining unit 501 may include And a first determining unit and a second determining unit (not shown), wherein the first determining unit is configured to determine the first codebook set; the second determining unit is configured to determine the second codebook set.
- the specific determination method is as in Embodiment 1 and 3, the contents of which are incorporated herein, and will not be described again here.
- the codebook set formed by the weight of the antenna particles determined by the device 500 and the codebook set formed by the weight of the antenna port are applicable to a two-dimensional planar antenna array having any number of antenna ports, such as one or one.
- the above antenna port, one column of the same-polarized antenna configuration in the vertical direction, and the multi-column antenna array of the same column antenna particle with different polarization directions and vertical directions in the cross-polarized antenna configuration are also applicable to the transmission rank equal to 1 or greater than 1.
- the fifth embodiment of the present invention provides a base station, where the base station includes the codebook determining apparatus according to the fourth embodiment, and the codebook set formed by the weighting of the antenna particles and the codebook set by the antenna port weighting.
- the base station includes the codebook determining apparatus according to the fourth embodiment, and the codebook set formed by the weighting of the antenna particles and the codebook set by the antenna port weighting.
- Fig. 6 is a block diagram showing the configuration of a base station according to a fifth embodiment of the present invention.
- base station 600 can include: a central processing unit (CPU) 601 and memory 602; and memory 602 is coupled to central processing unit 601.
- the memory 602 can store various data; further storing a program for determining the code book and the determined code book set, and executing the program under the control of the central processing unit 601 to determine the first codebook set formed by the antenna particle weighting, A second set of codebooks formed by antenna port weighting.
- the functionality of the codebook determining device can be integrated into the central processor 601.
- the central processing unit 601 can be configured to: determine a first codebook set formed by antenna particle weighting, and/or a second codebook set formed by weighting of an antenna port;
- the formula (1) and the formula (2) of the first embodiment are used to determine the first codebook set by the antenna particle weighting, and/or the second codebook set formed by the antenna port weighting.
- the adjustment factor is equal to 1; for the cross-polarized antenna configuration and the same column of antenna particles have different polarization directions, when the rank is equal to 1, the adjustment The factor "is the first phase shift factor.
- the adjustment factor is a first adjustment factor; the other column antennas other than the first column antenna, the adjustment factor is a second adjustment factor, the second adjustment
- the value of the factor is as described in Embodiment 3, and details are not described herein again.
- the codebook set formed by the antenna port weighting when the rank is greater than 1 is determined by using the codebook set formed by the antenna port weighting when the rank determined by the second determining unit is equal to 1.
- the size of the first codebook set by the antenna particle weighting and the codebook in the second codebook set by the antenna port weighting are the same or different.
- the first codebook set formed by the weighting of the antenna particles and the size of the codebook in the second codebook set formed by the antenna port weighting and the index of the adopted codeword satisfy the following relationship: ⁇ /N or approximately equal.
- the central processing unit 601 is configured to notify the user equipment of the determined first codebook set formed by the antenna particle weighting and the second codebook set formed by the antenna port weighting.
- the codebook determining device may be configured separately from the central processing unit.
- the codebook determining device may be configured as a chip connected to the central processing unit 601, and the codebook is implemented by the control of the central processing unit 601.
- the function of the device is determined, such as the codebook determining device 605 shown in FIG.
- the base station 600 may further include: a transceiver 603, an antenna 604, and the like; wherein the functions of the foregoing components are similar to the prior art, and details are not described herein again.
- the base station 600 also does not have to include all the components shown in FIG. 6; in addition, the base station 600 may further include components not shown in FIG. 6, and reference may be made to the prior art.
- Fig. 7 is a block diagram showing the configuration of a communication system according to a sixth embodiment of the present invention.
- the communication system 700 includes a base station 701.
- the base station 701 is configured to determine a first codebook set formed by antenna particle weighting, and a second codebook set formed by antenna port weighting.
- the specific structure, function, and implementation of the second codebook set. Example 5 is similar and will not be described here.
- the communication system 700 further includes a user equipment 702, configured to receive a first codebook set formed by weighting of antenna particles notified by the base station 701, and a second codebook set formed by weighting of antenna ports.
- the user equipment can also store the received set of codebooks.
- the user equipment can use the stored codebook set to perform information feedback, data or signal transmission, and the like.
- FIG. 8 is a block diagram showing the structure of a user equipment according to Embodiment 7 of the present invention.
- the user equipment 800 may include: a receiving unit 801 and a storage unit 802.
- the receiving unit 801 is configured to receive a first codebook set and antenna port weighting formed by weighting antenna particles notified by the base station 701.
- the second code book collection is configured to store the received set of codebooks.
- Example 7
- Step 901 A user equipment weights a first codebook set and/or an antenna port formed by using antenna particle weighting according to a predetermined antenna number of an antenna port and/or an antenna port number. Forming a second set of codebooks to determine antenna particle weighted information and/or antenna port weighted information;
- Step 902 feedback the determined antenna particle weighting information and/or antenna port weighting information to the base station.
- the number of antenna particles and the number of antenna ports M may be notified by the base station to the user equipment, where the user equipment may be configured or notified by any existing signaling or by newly established signaling, or may be semi-statically configured or notified.
- the dynamic notification may also be pre-stored on the user equipment end; the foregoing codebook set may be determined by the base station, and the user equipment is notified and stored by the user equipment.
- the method for determining the set of the foregoing codebooks by the base station is as described in Embodiment 3 of the embodiment, and the content thereof is incorporated herein, and details are not described herein again.
- the antenna particle weighting information includes a first codeword index used by the antenna particle weighting, and the information indicating that the antenna port weighting includes a second codeword index used by the antenna port weighting, and is represented as “ 2 .
- Step 901 includes:
- the user equipment searches for a corresponding antenna particle weighted codebook set in the first codebook set formed by the antenna particle weight according to the number of antenna particles of each antenna port; and then, according to the estimated channel information, the searched codebook set. Determining, by the first codeword index, the antenna particle weighting fed back to the base station;
- each codeword w in the codebook may be utilized according to the estimated channel information.
- channel information H to do some operations, according to the pre-set criteria to select the most suitable codeword, such as the criteria can be 11 ⁇ ⁇ 11 ⁇ ⁇ or other, and then by polling all the codewords in the codebook to get the most Excellent ⁇ This determines the index corresponding to the optimal codeword.
- Step 901 includes: the user The device may search for a codebook set corresponding to the number of antenna particles in the second codebook set formed by the antenna port weighting according to the predicted number of antenna particles used by each antenna port and the number of antenna ports M; Determining the second codeword index " 2 in the codebook set;
- the method for determining the index of the second codeword may be similar to the method for determining the first codeword index, and is not described herein again.
- the antenna particle weighted information is determined by the base station based on the location information of the user equipment, such as vertical direction angle information, etc., and the base station notifies the user equipment of the antenna particle weighting information.
- Step 901 The user equipment searches for a corresponding antenna particle weighted codebook set in the first codebook set formed by the antenna particle weighting according to the predicted antenna particle number K of each antenna port; and learns according to the selected codebook set.
- the size of the code book N ; the user equipment searches for the corresponding antenna port in the second codebook set formed by the antenna port weighting according to the predicted number of antenna particles ⁇ of each antenna port and the number of antenna ports M.
- the user equipment and the base station store the first codebook set and the second codebook set. Therefore, the user equipment can learn the codebook according to the predicted number of antenna particles, or the number of antenna particles and the number of antenna ports M. Any information, including the size of the code book, N
- the second codeword index can also be obtained by polling according to the antenna particle weighting.
- Step 901 includes:
- the user equipment searches for a corresponding antenna particle weighted codebook set in the first codebook set formed by the antenna particle weight according to the predicted number of antenna particles of each antenna port; the user equipment according to the predicted antenna of each antenna port Finding the corresponding antenna port weighted codebook set in the second codebook set formed by the antenna port weighting by the number of particles K and the number of antenna ports M;
- the determined codebook set can feed back corresponding information to the base station when the two-dimensional planar antenna array of any antenna port is used.
- FIG. 10 is a block diagram showing the construction of an information feedback apparatus according to Embodiment 8 of the present invention.
- the apparatus 1000 includes: an information determining unit 1001 and a feedback unit 1002.
- the information determining unit 1001 is configured to use antenna particle weighting according to the number of antenna particles and/or the number of antenna ports of the predicted antenna port.
- a second codebook set formed by the first codebook set and/or antenna port weighting, determining antenna particle weighted information and/or antenna port weighted information fed back to the base station; and feedback unit 1002 for feeding back antenna particle weighting to the base station Information and/or antenna port weighting information.
- the first codebook set formed by the antenna particle weighting and the second codebook set formed by the antenna port weighting are as shown in the formulas (1) and (2), and are not described herein again.
- the antenna particle weighting information includes a first codeword index used by the antenna particle weighting; the antenna port weighting information includes a second codeword index used by the antenna port weighting.
- the information determining unit 1001 includes a first searching unit and a first determining unit (not shown); wherein the first searching unit is configured to use the first code formed by weighting the antenna particles according to the number of antenna particles of each antenna port. Searching for a corresponding set of antenna particle weighted codebooks in the book set; the second determining unit is configured to determine, according to the estimated channel information, the first codeword used for weighting the antenna particles fed back to the base station in the searched codebook set Index
- the antenna particle weighting information is not known in advance, and the antenna particle weighting information is determined by the base station according to the location information of the user equipment, such as vertical direction angle information, etc., and the antenna particle weighting information is determined;
- the information determining unit 1001 includes: a second searching unit and a second determining unit (not shown); wherein the second searching unit is configured to use the number of antenna particles and the number of antenna ports M according to each antenna port that is predicted, Searching, in a second set of codebooks formed by antenna port weighting, a codebook set corresponding to the number of antenna particles; the second determining unit is configured to determine the second codeword index in the found codebook set. .
- the antenna particle weighted information is determined by the base station based on the location information of the user equipment, such as vertical direction angle information, etc., and the base station notifies the user equipment of the antenna particle weighting information.
- the information determining unit 1001 includes a third searching unit and a third determining unit (not shown); wherein the third searching unit is configured to perform antenna particle weighting according to the predicted number of antenna particles of each antenna port. Searching for a corresponding set of code-weighted codebooks in a set of codebooks; the user equipment searches for a corresponding second set of codebooks formed by antenna port weighting according to the predicted number of antenna particles per antenna port and the number of antenna ports M The antenna port weighted code book set; the third determining unit is configured to learn the size of the code book according to the selected code book set, obtain the size of the code book according to the selected code book set, and then according to the antenna particle obtained from the base station The weighted information and the size of the codebook, ⁇ determine the antenna port weighting information " 2 .
- the apparatus 1000 may further include a receiving unit (not shown) for receiving the number of antenna particles configured by the base station, and/or the number of antenna ports, or receiving the base station determination. of The first codeword index. Further, the receiving unit can store the information in the storage unit 1003.
- the information determining unit 1001 includes a fourth searching unit, a fourth determining unit, and a fifth determining unit (not shown);
- the fourth searching unit is configured to search for a corresponding antenna particle weighted codebook set in the first codebook set formed by the antenna particle weight according to the predicted number of antenna particles of each antenna port; the user equipment according to each of the predicted The number of antenna particles of the antenna port and the number of antenna ports M are searched for the corresponding antenna port weighted codebook set in the second codebook set formed by the antenna port weighting;
- the fourth determining unit is configured to learn the size of the code book according to the selected codebook set, and determine, according to the estimated channel information, the first codeword index used to weight the antenna particles fed back to the base station in the searched codebook set.
- the codebook set determined by the embodiment of the present invention can feed back corresponding information to the base station when the two-dimensional planar antenna array of any antenna port is used.
- the embodiment of the present invention further provides a user equipment, which includes the information feedback device described in Embodiment 9, and the configuration and functions thereof are as described in Embodiment 8, and details are not described herein again.
- Figure 11 is a block diagram showing the structure of a user equipment according to Embodiment 9 of the present invention.
- the user equipment 1100 includes: a central processing unit 1101 and a memory 1105; and a memory 1105 coupled to the central processing unit 1101.
- the figure is exemplary; other types of structures may be used in addition to or in place of the structure to implement telecommunications functions or other functions.
- the functionality of the information feedback device can be integrated into the central processor 1101.
- the central processing unit 1101 may be configured to: use the first codebook set and/or the antenna port weighting formed by the antenna particle weight according to the number of antenna particles of the predicted antenna port and/or the number of antenna ports.
- the codebook set determines antenna particle weighting information and/or antenna port weighting information fed back to the base station; and feeds back antenna particle weighting information and/or antenna port weighting information to the base station.
- the information feedback device may be configured separately from the central processing unit 1101.
- the information feedback device may be configured as a chip connected to the central processing unit 1101, and the function of the information feedback device is implemented by control of the central processing unit.
- the user equipment 1100 may further include: an input unit 1103, an audio processing unit 1104, a display 1106, a power supply 1107, and a communication module 1108. It is noted that the user equipment 1100 is not necessarily included in FIG. All of the components shown; in addition, the user device 1100 may also include components not shown in FIG. 11, and reference may be made to the prior art.
- central processor 1101 which is sometimes also referred to as a controller or operational control, may include a microprocessor or other processor device and/or logic device that receives input and controls each of user devices 1100. The operation of the part.
- the memory 1140 may be, for example, one or more of a buffer, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable device.
- the above-mentioned information related to the failure can be stored, and a program for performing feedback on the information can be stored.
- the central processing unit 1101 can execute the program stored by the memory 1105 to implement information storage or processing and the like.
- the functions of other components are similar to those of the existing ones and will not be described here.
- the various components of user equipment 1100 may be implemented by special purpose hardware, firmware, software or a combination thereof without departing from the scope of the invention.
- Embodiment 10 of the present invention also provides a communication system.
- the communication system includes a user equipment and a base station; wherein the user equipment weights according to the number of antenna particles of the predicted antenna port and/or the number of antenna ports M, the first codebook set and/or the antenna port weighted by the antenna particle weighting
- the second set of codebooks is configured to feed back information of antenna particle weighting and/or antenna port weighting information to the base station.
- the base station is configured to determine a first codebook set formed by weighting the antenna particles and/or an antenna port weight by using a phase shift vector caused by the position of the antenna particles in the two-dimensional planar antenna array.
- the second codebook set wherein, the formulas (1) and (2) can be determined, as described in the embodiments 1 to 3, and are not described herein again.
- FIG. 12 is a schematic structural diagram of an information feedback apparatus according to Embodiment 10 of the present invention.
- the information feedback apparatus 1200 includes: an information receiving unit 1201, and the information receiving unit 1201 is configured to receive Antenna particle weighted information and/or antenna port weighted information fed back by the user equipment.
- the information feedback apparatus 1200 may further include a codebook determining unit 1202, where the codebook determining unit 1202 is configured to determine a first codebook set and/or an antenna port weighting formed by antenna particle weighting.
- the specific method for determining the second set of codebooks is as shown in Embodiment 1-3, and details are not described herein again.
- the component codebook determining unit 1202 is an optional component, and the present embodiment can also predetermine the codebook set and store it in the storage unit.
- the information feedback apparatus 1200 may further include a storage unit 1203 for storing information received by the information receiving unit 1201 and a codebook set determined by the codebook determining unit 1202.
- the information feedback device 1200 may further include an information configuration unit 1204 and an information sending unit 1205.
- the information configuration unit 1204 is configured to configure the number of antenna particles used by each antenna port and/or Or the number of antenna ports; the information sending unit 1205 is configured to notify the user equipment of the configured number of antenna particles. In this way, after obtaining the number of the antenna particles, the user equipment can search for the corresponding codebook according to the information, and finally select the weight information of the antenna port.
- the component information configuration unit 1204 and the information transmitting unit 1205 are optional components.
- the information feedback apparatus 1200 may further include an information determining unit 1205, configured to determine antenna particle weighting information according to location information of the user equipment, and the information transmitting unit 1205 determines the determined antenna particle.
- the weighted information informs the user device.
- the user equipment can directly determine the information of the antenna port weighting according to the information of the antenna particle weighting.
- the antenna particle weighting information is as described in Embodiments 7, 8 and the component is an optional component.
- a base station is further provided, where the base station includes the information feedback device of FIG. 12, and is configured to receive antenna particle weighting information and/or antenna port weighting information fed back by the user equipment.
- the base station determines antenna particle weighting and/or antenna port weighting based on the above information, and applies antenna particle weighting and/or antenna port weighting to the precoding operation in information transmission to the user equipment.
- FIG. 13 is a schematic structural diagram of a base station in this embodiment.
- the base station 1300 includes the above information feedback means.
- base station 1300 can include: a central processing unit (CPU) 1301 and a memory 1302; and a memory 1302 coupled to central processing unit 1301.
- the memory 1302 can store various data; further storing a program for information feedback, and/or a codebook determined program and a determined codebook set, and also storing the received information; executing the control under the control of the central processing unit 1301
- the program receives information fed back by the user equipment.
- the functionality of the information feedback device can be integrated into the central processor 1301. Its The central processing unit 1201 may be configured to: receive antenna particle weighting information and/or antenna port weighting information fed back by the user equipment.
- the central processing unit 1301 is configured to: determine a codebook set formed by antenna chip weighting and/or an antenna port weighting, and the specific determining method is as shown in Embodiment 1-3. Narration.
- the central processing unit 1301 is configured to: configure the number of antenna particles used by each antenna port; notify the user equipment of the number of configured antenna particles.
- the central processing unit 1301 is configured to: determine antenna particle weighted information based on location information of the user equipment, and notify the user equipment of the determined antenna particle weighting information.
- the information feedback device 1304 can be configured separately from the central processing unit 1301.
- the information feedback device can be configured as a chip connected to the central processing unit 1301, and the information feedback device can be implemented by the control of the central processing unit 1301. The function is as shown in FIG. 13 by the information feedback device 1305.
- the base station 1300 may further include: a transceiver 1303, an antenna 1304, and the like; wherein the functions of the foregoing components are similar to the prior art, and details are not described herein again. It should be noted that the base station 1300 does not have to include all the components shown in FIG. 13; in addition, the base station 1300 may further include components not shown in FIG. 13, and reference may be made to the prior art.
- the user equipment is also used to perform antenna particle weighting in the frequency domain when transmitting data channels, and/or common channels or signals. Therefore, based on the above embodiment, the user equipment further includes an information processing unit (not shown) for performing antenna particle weighting in the frequency domain when transmitting the data channel, and/or the common channel or signal.
- an information processing unit not shown
- antenna elements used by different user equipments are weighted differently, so that each user equipment can adaptively adjust the pointing of the vertical direction beam.
- a common channel or signal such as a physical broadcast channel (PBCH), a physical downlink control channel (PDCCH), a physical downlink data channel (PDSCH) that does not use demodulation reference signal (DMRS) demodulation, a cell-specific reference signal (CRS)
- PBCH physical broadcast channel
- PDCCH physical downlink control channel
- PDSCH physical downlink data channel
- DMRS demodulation reference signal
- CRS cell-specific reference signal
- the following antenna particle weighting vector or the following antenna particle weighting vector weighting can be used.
- the vector formed by cyclic shifting of the values performs antenna particle weighting; the values are the same as before, and are the number of antenna particles in one antenna port, that is, the dimension of the antenna particle weight vector.
- the vector is:
- 6 is the number of 1s in the weight vector, and 6 is A positive integer that can be divisible.
- the antenna particle weighting vector is or ; l/V2 [l, 0, 0, - - -, 0,1,0,0, ⁇ ⁇ ⁇ ,, Of
- the antenna particle weight vector is ;
- the antenna particle weight vector is ⁇ , ⁇ ,...
- the embodiment of the present invention further provides a computer readable program, wherein the program causes a computer to execute Embodiments 1 to 3 in the codebook determining apparatus or a base station when the program is executed in a codebook determining apparatus or a base station The codebook determination method.
- the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the codebook determining method described in Embodiments 1 to 3 in a codebook determining device or a base station.
- the embodiment of the present invention further provides a computer readable program, wherein when the program is executed in an information device or a user equipment, the program causes the computer to execute the method described in Embodiment 7 in the information feedback device or the user equipment.
- Information feedback method when the program is executed in an information device or a user equipment, the program causes the computer to execute the method described in Embodiment 7 in the information feedback device or the user equipment.
- the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the information feedback method described in Embodiment 7 in the information feedback device or the user equipment.
- the above apparatus and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software.
- the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
- Logic components such as field programmable logic components, microprocessors, processors used in computers, and the like.
- the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.
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Abstract
一种码书确定装置、基站和通信***,该码书确定装置包括码书确定单元,该码书确定单元用于确定天线粒子加权所构成的第一码书集合、和/或天线端口加权所构成的第二码书集合;其中,分别采用公式(1)和(2)来确定该第一码书集合和第二码书集合。通过本发明实施例确定的码书可适用于具有任意个包含K个天线端口粒子的天线端口的二维平面天线阵列。
Description
码书确定装置、 信息反馈装置和通信*** 技术领域
本发明涉及通信领域, 特别涉及一种码书确定装置、 信息反馈装置和通信***。 背景技术
多输入多输出 (MIMO, Multiple-Input Multiple -Output) 技术是增强的长期演进 (LTE-Advanced) ***重要的物理层技术之一, 用于提供空间分集增益、 空间复用 增益及阵列增益。
在 LTE版本 11及以前的技术中, MIMO技术均是采用水平放置的一维( 1D)线 性阵列, 在水平面上具备自适应能力, 即二维 (2D) MIMO技术。 在版本 12的研究 中, 引入了 2D的平面阵列, 结合有源天线*** (AAS, Active Antenna System) 相 关技术, 在水平维度和仰角维度均可提供自适应控制以更好地提高***性能, 即 3D MIMO技术。
图 1和图 2给出两种常用的平面阵列结构示意图,图 1是交叉极化二维平面阵列 结构示意图, 图 2是均匀线性二维平面阵列结构示意图。如图 1所示, 垂直方向上每 列放置 M个交叉极化天线对,水平方向上共放置 N列交叉极化天线对。如图 2所示, 垂直方向上每列放置 M个同一个极化方向的天线阵列 (如图 2中的垂直极化天线), 水平方向上共放置 N列。
在上述平面阵列***中, 随着天线数目的增加, 参考信号的开销也随之增大。 为 发挥垂直方向的波束调节功能, 同时控制天线端口数目,可将垂直方向的多根天线粒 子虚拟成一个天线端口, 发送相同的参考信号。在一个天线端口内, 通过对多个天线 粒子进行加权来调整垂直方向的波束方向。与天线粒子加权相对应,天线端口的加权 即为传统意义上的预编码操作。
应该注意, 上面对技术背景的介绍只是为了方便对本发明的技术方案进行清楚、 完整的说明, 并方便本领域技术人员的理解而阐述的。不能仅仅因为这些方案在本发 明的背景技术部分进行了阐述而认为上述技术方案为本领域技术人员所公知。 发明内容
目前, 在垂直方向只配置一个天线端口或 2个交叉极化方式排布的天线端口时,
3D MIMO***退化成 1D水平阵列***,这样,该 LTE***可以使用已有的码书(如 之前版本协议的水平方向码书)。 但是在垂直方向上同一极化方向的天线端口数多于
1时, 将不能直接使用已有的码书, 需要重新确定适合该天线配置的码书。
本发明实施例提供一种码书确定装置、信息反馈装置和通信***,通过该装置确 定的码书适合于具有任意多个包括 个天线粒子的天线端口的二维平面天线阵列。
根据本发明实施例的第一方面, 提供了一种码书确定装置, 包括:
码书确定单元, 该码书确定单元用于确定天线粒子加权所构成的第一码书集合、 和 /或天线端口加权所构成的第二码书集合; 其中,
在公式 (1 ) 和 (2 ) 中, 表示电磁波波长; 表示垂直方向天线粒子的间距; 是垂直方向构成的一个天线端口的天线粒子数量, 为大于零的正整数;
表示垂直方向构成一个天线端口的天线粒子的索引,取值范围为 [1, Κ ] , 为 天线粒子加权所构成的码书的尺寸大小, 表示采用的码字在天线粒子加权构成的码 书集合中的天线粒子加权索引;
«表示调整因子; M表示垂直方向天线端口的数量, w为所在天线端口的索引, 取值范围为 [1, M ] , M为大于零的正整数; ^为天线端口加权所构成的码书的尺 寸大小, "2表示采用的码字在天线端口加权构成的码书集合中的天线端口加权索引 根据本发明实施例的第二方面, 提供了一种信息反馈装置, 包括:
信息确定单元, 该信息确定单元用于根据预知的每个天线端口的天线粒子数量、 利用天线粒子加权所构成的第一码书集合和 /或天线端口加权所构成的第二码书集 合, 确定向基站反馈的天线粒子加权的信息和 /或天线端口加权的信息;
反馈单元, 该反馈单元用于向基站反馈天线粒子加权的信息和 /或天线端口加权 的信息。
根据本发明实施例的第三方面, 提供了一种通信***, 包括基站, 其中, 该通信
***还包括用户设备, 该用户设备根据预知的每个天线端口的天线粒子数量、利用天 线粒子加权所构成的第一码书集合和 /或天线端口加权所构成的第二码书集合, 向基 站反馈天线粒子加权的信息和 /或天线端口加权的信息。
本发明实施例的有益效果在于:通过上述实施例确定的码书适合于具有任意多个 包括 个天线粒子的天线端口的二维平面天线阵列。
参照后文的说明和附图,详细公开了本发明的特定实施方式,指明了本发明的原 理可以被采用的方式。应该理解, 本发明的实施方式在范围上并不因而受到限制。在 所附权利要求的精神和条款的范围内,本发明的实施方式包括许多改变、修改和等同。
针对一种实施方式描述和 /或示出的特征可以以相同或类似的方式在一个或更多 个其它实施方式中使用, 与其它实施方式中的特征相组合, 或替代其它实施方式中的 特征。
应该强调, 术语"包括 /包含"在本文使用时指特征、 整件、 步骤或组件的存在, 但并不排除一个或更多个其它特征、 整件、 步骤或组件的存在或附加。 附图说明
所包括的附图用来提供对本发明实施例的进一步的理解,其构成了说明书的一部 分, 用于例示本发明的实施方式, 并与文字描述一起来阐释本发明的原理。 显而易见 地, 下面描述中的附图仅仅是本发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出创造性劳动性的前提下, 还可以根据这些附图获得其他的附图。 在附图中: 图 1是交叉极化二维平面阵列结构示意图;
图 2是均匀线性二维平面阵列结构示意图;
图 3是垂直方向具有两个天线端口情况下的位置所引起的相移向量、天线粒子加 权和天线端口加权的示意图;
图 4是本发明实施例 1的码书确定方法流程图;
图 5是本发明实施例 4的码书确定装置构成示意图;
图 6是本发明实施例 5的基站构成示意图;
图 7是本发明实施例 6的通信***构成示意图;
图 8是本发明实施例 6的用户设备构成示意图;
图 9是本发明实施例 7的信息反馈方法流程图;
图 10是本发明实施例 8的信息反馈装置构成示意图;
图 11是本发明实施例 9的用户设备构成示意图;
图 12是本发明实施例 10的信息反馈装置构成示意图;
图 13是本发明实施例 11基站构成示意图。 具体实施方式
参照附图, 通过下面的说明书, 本发明的前述以及其它特征将变得明显。在说明 书和附图中, 具体公开了本发明的特定实施方式,其表明了其中可以采用本发明的原 则的部分实施方式, 应了解的是, 本发明不限于所描述的实施方式, 相反, 本发明包 括落入所附权利要求的范围内的全部修改、变型以及等同物。下面结合附图对本发明 的各种实施方式进行说明。 这些实施方式只是示例性的, 不是对本发明的限制。
为了解决现有技术中存在的问题, 本发明实施例提供一种码书确定方法及其装 置、 信息反馈方法及其装置、 通信***。通过本发明实施例的码书确定方法确定的码 书可适用于具有任意个包含多个天线粒子的天线端口的二维平面天线阵列。
以下结合附图对本发明实施例进行详细说明。 实施例 1
图 4是本发明实施例 1的码书确定方法流程图。 如图 4所示, 该方法包括: 步骤 401,基站确定天线粒子加权所构成的第一码书集合、和 /或天线端口加权所 构成的第二码书集合。
朱 : j {m - ) 2πΚάνη2
a x e p w = l, 2, ... , ( 2 )
λΝ,
在公式 (1) 和 (2) 中, 表示电磁波波长; 表示垂直方向天线粒子的间距; 是垂直方向构成的一个天线端口的天线粒子数量, 为大于零的正整数;
在公式 (1) 中, 表示垂直方向构成一个天线端口的天线粒子的索引, 取值范 围为 [1, K], 为天线粒子加权所构成的码书的尺寸大小, 表示采用的码字在天 线粒子加权构成的码书集合中的天线粒子加权索引;
在公式 (2) 中, 表示调整因子; M表示垂直方向天线端口的数量, w为所在 天线端口的索引, 取值范围为 [1, M], M为大于零的正整数; ^为天线端口加权 所构成的码书的尺寸大小, "2表示采用的码字在天线端口加权构成的码书集合中的天 线端口加权索引。
在本实施例中, 上述同一列天线粒子的极化方向可相同或不同。
由上述公式 (1) 可知, 根据 的取值, 该公式 (1) 可确定一系列的码书集合, 即每一个 值, 对应一套码书集合。
例如,
w.
同理, 还可获得其他 值对应的码书集合, 此处不再一一列举。
在由公式(1)确定的一系列码书集合中, 与每个 值相对应的码书尺寸 可以 相同或不同。
由上述公式 (2) 可知, 在 值一定的情况下, 根据 M的取值, 该公式 (2) 可 确定一系列的码书集合, 即每一个 M值, 对应一套码书集合。
同理, 还可获得其他 M值对应的码书集合, 此处不再一一列举。
在由公式 (2) 确定的一系列码书集合中, 与每个 M值相对应的码书尺寸 ^可 以相同或不同。
由上述公式 (2) 可知, 根据 的取值, 该公式 (2) 可确定一系列的码书集合, 即每一个 值, 对应一套码书集合。
同理, 还可获得其他 值对应的码书集合, 此处不再一一列举。
在由公式 (2) 确定的一系列码书集合中, 与每个 Μ值相对应的码书尺寸 可 以相同或不同。
由上述可知,该第一码书集合和第二码书集合均与天线粒子数量 有关,对于天 线粒子加权, 会影响该第一码书集合中向量的个数, 而对于该第二码书集合, 影 响 ^表达式中 的具体值。
在本实施例中, 天线粒子加权和天线端口加权所构成的预编码码本尺寸可以相 同, gp Vl = V2 ; 也可以不相同, 即 V1 ≠ V2 当 =N: N
时, 天线粒子加权和天 线端口加权的码书具有相同的精细度, 当 2时, 既可以 , 天线粒子加权
N、 <N,
比天线端口加权的码书划分得更精细, 也可以 Vl 2, 即天线端口加权比天线粒子 加权的码书划分得更精细。
由上述实施例可知, 可通过上述方法确定平面天线阵列任意天线端口的码书,解 决了现有技术中存在的问题, 并且还可适用于多种情况, 如同一极化、 不同极化、 多 秩传输、 多列天线等情况。
在本实施例中, 上述码书集合可由基站生成, 并且可以进行储存, 此外还可通知 用户设备, 使得用户设备根据上述码书集合向基站反馈相关信息。
如图 4所示, 该方法还可包括:
步骤 402, 将确定的该第一码书集合和 /或该第二码书集合通知用户设备。
例如, 可通过现有的任何一个信令或者新建的信令传输上述码书集合, 此外, 可 动态信令通知或半静态方式通知该用户设备。
在本实施例中, 该步骤 402为可选步骤。
在上述实施例中, 在天线数较多的***中, 天线粒子的间距的取值可较小, 如
0.5λ或 0.8λ等。 在这种情况下, 可以利用波束赋形技术将发送信号的能量集中于特 定的位置, 但天线粒子的间距不限于上述取值。
在本实施例中,在确定天线端口加权所构成的码本集合时,针对垂直方向的一列 同一极化天线、 且传输秩等于 1 的情况, 公式 (2) 中的调整因子《可等于 1, 但不 限应该值。
在本实施例中,在秩等于 1时,针对交叉极化天线配置且同一列天线粒子具有不 同极化方向, 在秩等于 1时, 该调整因子《为第一相移因子。
在本实施例中, 在秩等于 1时, 针对垂直方向的一列以上的天线阵列, 对于第一 列天线, 该调整因子为第一调整因子, 在同一列天线粒子具有同一极化方向时, 该第 —调整因子可为 1 ; 在同一列天线粒子具有不同极化方向时, 该第一调整因子可为该 第一相移因子; 针对该第一列天线以外的其他列天线, 该调整因子为第二调整因子, 在每列天线粒子具有同一极化方向时, 该第二调整因子可为第二相移因子或复数;在 每列天线粒子具有不同极化方向时,该第二调整因子可为该第一相移因子与上述第二 相移因子或复数的乘积。例如,该第二相移因子或复数可以为水平方向的天线端口加 权, 但不限于这种情况。 在本实施例中, 在该第一列以外的其他列天线中, 不同列天 线的第二调整因子可以相同, 也可以不同。
在本实施例中, 在进行多秩传输, 即秩大于 1时, 可利用上述秩等于 1时获得的 天线端口加权所构成的码书集合来确定秩大于 1 时的天线端口加权所构成的码书集 合, 例如, 可通过豪斯霍尔德 (householder) 变换或 LTE版本 10中八天线预编码多 秩传输码字确定的方式获得秩为 2或 2以上的预编码码书。
由上述实施例可知,通过上述方法可确定天线粒子加权所构成的码书集合、天线 端口加权所构成的码书集合,并且上述码书集合可适用于具有任意个包含 个天线粒 子的天线端口的二维平面天线阵列, 如适用于一个或一个以上天线端口、在垂直方向 的一列同极化的天线配置、交叉极化天线配置中同一列天线粒子不同极化方向、垂直
方向的多列天线阵列、 也适用于传输秩等于 1或大于 1的情况。 实施例 2
基于实施例 1, 以具体实例对本发明的码本确定方法进行说明。
如图 1和图 2所示, 在 2D平面矩形阵列***中, 可将垂直方向的多根天线粒子 虚拟成一个天线端口。例如, 在垂直方向上, 同一极化方向的 个天线粒子组成一个 天线端口, 在垂直方向上共有 M个天线端口, 水平方向共有 N个天线端口。
在针对垂直方向一列天线的情况下,同一极化方向的 MK个天线粒子由于放置位 置所引起的相移向量为:
ν-[ν1,ν2,···,ν/,···,νΜ,]Γ , v,(l = 1,2,- -,ΜΚ), 其中, 表示第 /个天线粒子的相 移向量。
所有天线粒子加权组成的向量为:
w-[w1, v2,---, v/,---, vMff , w,(l = 1,2,- --,MK); 其中, W/表示第 /个天线粒子的 天线粒子加权向量;
天线端口加权, 即秩为 1时的预编码向量为:
!!二^,^,…,^,…,^^ , um(m = \X---,M) ; 其中, wm表示第 w个天线端口的 天线端口加权向量。
在本实施例中,为简化天线粒子加权,假设各个天线端口 个天线粒子所组成的 加权向量可以相同, 即
[ W , w2 ,…, ] = , wK+2 ,---,w2K} =■■■ = [_ w(M_l)K+l , w(M_l)K+2 ,…, w 在各个天线端口 个天线粒子加权向量均相同的前提下,图 3给出了垂直方向具 有两个天线端口情况下, 由天线粒子的位置所引起的相移向量、天线粒子加权向量和 天线端口加权向量的示意图。 其中在垂直方向上, =10个天线粒子组成一个天线端 口, 具有两个天线端口, 即 Μ=2。
首先, 对天线粒子加权所构成的码本集合的确定进行说明:
1) 确定各天线粒子由于放置位置所引起的相移向量, 例如, 采用 LTE版本 12 的协议 TS 37840-clO中的方法, 但不限于上述方式。
2) 利用该相移向量确定天线粒子加权, 即该天线粒子加权采用如下形式 (公式 (4) 所示) 匹配位置向量 (即相移向量): w.
在公式(4)中, σ 表示电子下倾角, = 0时表示与天线阵列垂直; 其中, 在本领域中,将天线物理上倾斜的一个角度称为机械下倾角, 而通过加权也可以达到 调机械下倾角类似的效果, 因此, 将其称为电子下倾角。
3 )将具有上述形式的天线粒子加权采用离散傅里叶变换(DFT, Discrete Fourier Transform) 向量的形式去匹配该位置向量, 该公式 (4) 还可表示为:
这样, 可通过公式 (4) 或 (5 )来获得天线粒子加权所构成的码书集合。 在公式 ( 5 ) 中, 为天线粒子加权所构成的码书的尺寸大小, "1表示采用的码字在天线粒 子码书集合中的索引。 在由公式 (5 ) 确定的一系列码书集合中, 与每个可能的 Κ值 相对应的码书尺寸可以是相同或不同的。
其次, 对天线端口加权所构成的码本集合的确定进行说明:
针对垂直方向的一列同一极化天线、 且传输秩等于 1的情况, 公式 (2 ) 中的调 整因子《等于 1。
在公式 (6) 中, 各符号的含义与上述相同, 此处不再赘述。
这样, 可通过公式 (8) 或 (9)来获得天线端口加权所构成的码书集合。 在公式 (9)中, ^为天线端口加权所构成的码书的尺寸大小, "2表示采用的码字在码书集 合中的索引。 在由公式 (9)确定的一系列码书集合中, 与每个可能的 M值相对应的 码书尺寸可以是相同或不同的。
例如, 在 = ()'5^时, 基于 DFT形式的天线粒子加权和天线端口加权 (统称为 预编码) 可为:
公式 (10) 和 (11 ) 仅为本发明实施例, 在 /^取值为 0.8或其它较小的值时, 与 = ()·5特性相同, 此处不再赘述。
在本实施例中, 在公式 (10 ) 和 (11 ) 中, N n N2取值可以为 8,16,32,64,128 等 2的幂次, 也可以取值为非 2的幂次。
在本实施例中, 由上述获得第一码书集合和第二码书集合的过程可知, 该第一码 书和第二码书都与位置向量有关,该位置向量中的仰角离开角 是从 0- 2 均匀量化, 用 2^¾/^1或2 ^2/^来表示该量化值, 其中, 的取值是 0到^1 _ 1, "2的取值是
0 到 ^ -1 ; 天线粒子加权和端口加权都与角度 有关。 这样, 对于同一个参数, 该 量化值可相同或近似相同,如精确值为: nJN、= lNi,此外,该" 也可与 近似相同。
在上述实施例中,为了简化计算,假设各个天线端口 个天线粒子所组成的加权 向量相同,但通过上述方法确定的第一码书集合和第二码书集合的应用不受该假设的 限制。对于各个天线端口 个天线粒子所组成的加权向量不同的情况、 以及多列垂直 天线、 不同极化方向的情况可基于上述结果通过调整因子 来确定。
以上以同一极化方向的垂直天线端口加权为例进行的说明, 且应用在秩等于 1 的传输情况。 以下对多列垂直天线、 同一列不同极化方向、 多秩传输的情况分别进行 说明。 实施例 3
基于实施例 1和 2, 对于与实施例 1和 2相同的特征不再赘述, 仅对与上述不同 的特征详细说明。
1、在秩等于 1时,针对交叉极化天线配置且同一列天线粒子具有不同极化方向, 在秩等于 1时, 该调整因子 "为第一相移因子; 例如,
在本实施例中, 该第一相移因子的引入可以使上述公式 (2) 具有不同的表现形 式,例如,同一列两个交叉极化方向天线组成的天线端口加权可以表示为单码本结构, 如 Lu'e u」 ; 还可表示为双码书结构, 与 LTE版本 10中八天线预编码的双码本 结构类似;例如,
U 0
W, ,υ = [ι ιι„ι+1 · · ,ιι„ι +Χ-
0 U 为式 (11 )确定的天线端口加权的序 号为 的码字, J为大于等于 1的正整数, W2 = Le' ' e e'」 , 其中 e'为第 水 元素为 1, 其它元素为 0的 χΐ维单位列向: 2、 在秩等于 1时, 针对垂直方向的一列以上的天线阵列
在本实施例中,对于该一列以上的天线阵列,每一列天线粒子的极化方向可以相 同, 也可以不同。
对于全部天线都是同极化天线的情况:
对于第一列天线, 可采用实施例 2所述的方法确定天线端口加权; 对于其他列天 线, 可在该第一列天线端口加权的基础上整体乘上一个调整因子来获得; 其中, 该调 整因子可为第二相移因子或复数,例如, 该第二相移因子或复数可以是水平方向的天 线端口加权, 如 LTE***可以使用的当前 2天线, 4天线或 8天线码本的加权值。
对于全部天线都是交叉极化天线的情况:
对于第一列天线, 可使用本实施例上述 " 1 " 中的方法确定天线端口加权; 对于其他列天线,可在该第一列天线端口加权的基础上整体乘上一个调整因子来 获得, 该调整因子的取值可以是上述第二相移因子或复数与上述第一相移因子相乘。
在上述实施例中,对于除了第一列以外的其他列天线, 使用的调整因子可相同或 不同。 3、 在进行多秩传输, 即秩大于 1 :
可利用上述秩等于 1 时获得的天线端口加权所构成的码书集合来确定秩大于 1 时的天线端口加权所构成的码书集合。
例如, 可以利用实施例 2的式 (11 ) 和 /或本实施例的 " 1 "和 /或 "2"确定的秩
为 1的天线端口加权码字通过豪斯霍尔德 (householder) 变换或 LTE版本 10中八天 线预编码多秩传输码字确定方法获得秩为 2或 2以上的预编码码书。 实施例 4
图 5是本发明实施例 4的码书确定装置构成示意图。如图 5所示,装置 500包括: 码书确定单元 501,码书确定单元 501用于确定天线粒子加权所构成的第一码书集合、 和 /或天线端口加权所构成的第二码书集合; 其中分别利用实施例 1所述的公式(1 )、 ( 2 ) 确定该第一码书集合、 第二码书集合。
在本实施例中, 装置 500还可包括通知单元 502, 通知单元 502用于将确定的该 第一码书集合和该第二码书集合通知用户设备。具体的通知方式如实施例 1所述,此 处不再赘述。 部件通知单元 502为可选部件。
在本实施例中, 可由码书确定单元 501确定该第一码书集合和该第二码书集合, 也可通过不同的部件分别来确定上述码书集合, 这样, 码书确定单元 501可包括: 第 一确定单元和第二确定单元 (未示出), 其中, 该第一确定单元用于确定该第一码书 集合; 该第二确定单元用于确定该第二码书集合。
在本实施例中, 针对垂直方向的一列同一极化的天线配置, 在秩等于 1时, 具体 的确定方法如实施例 1和 2所述, 将其内容合并于此, 此处不再赘述。
在秩等于 1时,针对交叉极化天线配置且同一列天线粒子具有不同极化方向, 或 针对垂直方向的一列以上的天线阵列、或者多秩传输的情况, 具体的确定方法如实施 例 1和 3所述, 将其内容合并于此, 此处不再赘述。
由本实施例可知,通过装置 500确定的天线粒子加权所构成的码书集合、天线端 口加权所构成的码书集合,适用于具有任意个天线端口的二维平面天线阵列, 如适用 于一个或一个以上天线端口、在垂直方向的一列同极化的天线配置、交叉极化天线配 置中同一列天线粒子不同极化方向、垂直方向的多列天线阵列、也适用于传输秩等于 1或大于 1的情况。 实施例 5
本发明实施例 5提供一种基站, 该基站包括实施例 4所述的码书确定装置,用于 确定的天线粒子加权所构成的码书集合、天线端口加权所构成的码书集合, 该码书确
定装置的构成和各部件的作用与实施例 4相同, 此处不再赘述。
图 6是本发明实施例 5的基站构成示意图。 如图 6所示, 基站 600可以包括: 中 央处理器 (CPU) 601和存储器 602; 存储器 602耦合到中央处理器 601。 其中存储 器 602可存储各种数据; 此外还存储确定码书的程序和确定的码书集合, 并且在中央 处理器 601的控制下执行该程序,确定天线粒子加权所构成的第一码书集合、天线端 口加权所构成的第二码书集合。
在一个实施方式中,码书确定装置的功能可以被集成到中央处理器 601中。其中, 中央处理器 601 可以被配置为: 确定天线粒子加权所构成的第一码书集合、 和 /或天 线端口加权所构成的第二码书集合; 其中
采用实施例 1的公式(1 )和公式(2 )来确定天线粒子加权所构成的第一码书集 合、 和 /或天线端口加权所构成的第二码书集合。
在针对垂直方向的一列同一极化的天线配置,在秩等于 1时,调整因子《等于 1 ; 针对交叉极化天线配置且同一列天线粒子具有不同极化方向,在秩等于 1时, 该 调整因子《为第一相移因子。
针对垂直方向的一列以上的天线阵列,其中的第一列天线, 该调整因子为第一调 整因子; 该第一列天线以外的其他列天线, 该调整因子为第二调整因子, 该第二调整 因子的取值如实施例 3所述, 此处不再赘述。
在秩大于 1时,利用所述第二确定单元确定的秩等于 1时的天线端口加权所构成 的码书集合来确定秩大于 1时的天线端口加权所构成的码书集合。
该天线粒子加权所构成的第一码书集合和该天线端口加权所构成的第二码书集 合中的码书的尺寸相同或不同。
中央处理器 601 被配置为用于将确定的该天线粒子加权所构成的第一码书集合 和该天线端口加权所构成的第二码书集合通知用户设备。
在另一个实施方式中, 该码书确定装置可以与中央处理器分开配置,例如可以将 该码书确定装置配置为与中央处理器 601连接的芯片,通过中央处理器 601的控制来 实现码书确定装置的功能, 如图 6所示的码书确定装置 605。
此外, 如图 6所示, 基站 600还可以包括: 收发机 603和天线 604等; 其中, 上 述部件的功能与现有技术类似, 此处不再赘述。值得注意的是, 基站 600也并不是必 须要包括图 6中所示的所有部件;此外,基站 600还可以包括图 6中没有示出的部件, 可以参考现有技术。 实施例 6
图 7是本发明实施例 6的通信***构成示意图。如图 7所示,通信*** 700包括 基站 701, 基站 701用于确定的天线粒子加权所构成的第一码书集合、 天线端口加权 所构成的第二码书集合, 其具体构成和作用与实施例 5类似, 此处不再赘述。
如图 7所示, 通信*** 700还包括用户设备 702, 用于接收基站 701通知的天线 粒子加权所构成的第一码书集合、 天线端口加权所构成的第二码书集合。此外, 该用 户设备还可将接收到的上述码书集合进行储存。这样该用户设备可利用存储的上述码 书集合进行信息反馈、 数据或信号的传输等。
图 8是本发明实施例 7的用户设备构成示意图。如图 8所示,用户设备 800可包 括: 接收单元 801和存储单元 802; 其中, 接收单元 801用于接收基站 701通知的天 线粒子加权所构成的第一码书集合、天线端口加权所构成的第二码书集合。存储单元 802用于将接收到的上述码书集合进行储存。 实施例 7
图 9是本发明实施例 7的信息反馈方法流程图。 如图 9所示, 该方法包括: 步骤 901, 用户设备根据预知的天线端口的天线粒子数量和 /或天线端口数量、 利用天线粒子加权所构成的第一码书集合和 /或天线端口加权所构成的第二码书集合 确定天线粒子加权的信息和 /或天线端口加权的信息;
步骤 902, 将确定的天线粒子加权的信息和 /或天线端口加权的信息向基站反馈。 在本实施例中, 该天线粒子数量 、天线端口数量 M可由基站通知该用户设备, 其中可通过现有的任何信令通知或者通过新建的信令通知, 可半静态地配置并通知, 也可动态通知; 也可以是预先存储在用户设备端; 上述码书集合可由基站确定, 并通 知该用户设备, 由用户设备存储。 并且该基站确定上述码书集合的方法见实施例 广 实施例 3所述, 将其内容合并于此, 此处不再赘述。
在本实施例中, 该天线粒子加权的信息包括天线粒子加权使用的第一码字索引, 表示为 ^该天线端口加权的信息包括天线端口加权使用的第二码字索引,表示为《2。
1、 在用户设备反馈天线粒子加权的信息时:
步骤 901包括:
该用户设备根据每个天线端口的天线粒子数量 在天线粒子加权所构成的第一 码书集合中査找相应的天线粒子加权的码书集合; 然后根据估计到的信道信息、在査 找的码书集合中确定向该基站反馈的天线粒子加权采用的第一码字索引 ;
在确定向该基站反馈的天线粒子加权采用的第一码字索引"1时,可采用现有的任 何一种方法, 例如, 可根据估计到的信道信息, 利用码书中的各个码字 w和信道信息 H做一些操作,根据预先设定的准则去选择最适合的码字,如准则可以是11^^11^^或 其他, 然后通过对码书中的所***字进行轮询获得最优的^ 这样就可确定该最优的 码字对应的索引。
2、 在用户设备反馈天线端口加权的信息时:
1 ) 该用户设备不知道该天线粒子加权的信息, 该天线粒子加权的信息由基站根 据该用户设备的位置信息, 如垂直方向角度信息等确定该天线粒子加权的信息; 步骤 901包括:该用户设备可根据预知的每个天线端口使用的天线粒子数量 和 天线端口数量 M, 在天线端口加权所构成的第二码书集合中査找与天线粒子的数量 对应的码书集合; 在査找到的该码书集合中确定该第二码字索引 "2;
其中, 可采用现有的任何一种方法来确定该第二码字索引, 与上述确定第一码字 索引的方式类似, 此处不再赘述。
2) 该用户设备知道该天线粒子加权的信息
例如, 该天线粒子加权的信息由基站根据该用户设备的位置信息, 如垂直方向角 度信息等确定该天线粒子加权的信息;并且该基站将该天线粒子加权的信息通知该用 户设备。
步骤 901包括:该用户设备根据预知的每个天线端口的天线粒子数量 K在天线粒 子加权所构成的第一码书集合中査找相应的天线粒子加权的码书集合;根据选择的码 书集合获知码书的尺寸 N、; 该用户设备根据预知的每个天线端口的天线粒子数量 κ 和天线端口数量 M在天线端口加权所构成的第二码书集合中査找相应的天线端口加
权的码书集合; 根据选择的码书集合获知码书的尺寸 2, 根据该天线粒子加权的信 息和码书的尺寸 、 ^确定天线端口加权的信息《2。
在本实施例中,该用户设备和基站存储上述第一码书集合和第二码书集合,因此, 该用户设备可根据预知的天线粒子数量 、 或者天线粒子数量 和天线端口数量 M 获知码书的任何信息, 包括码书的尺寸 、 N
例如, 利用 / z ^/N 来获得该第二码字索引。 此外, 也可以根据天线粒子 加权, 通过轮询的方式获得第二码字索引。
3、 在该用户设备反馈天线粒子加权的信息和天线端口加权的信息时: 步骤 901包括:
该用户设备根据预知的每个天线端口的天线粒子数量 在天线粒子加权所构成 的第一码书集合中査找相应的天线粒子加权的码书集合;该用户设备根据预知的每个 天线端口的天线粒子数量 K和天线端口数量 M在天线端口加权所构成的第二码书集 合中査找相应的天线端口加权的码书集合;
根据选择的码书集合获知码书的尺寸 根据估计到的信道信息、 在査找的码 书集合中确定向该基站反馈的天线粒子加权采用的第一码字索引" 1
根据选择的码书集合获知码书的尺寸^, 根据该天线粒子加权采用的第一码字 索引" 1和码书的尺寸 N、、 ^确定天线端口加权的信息 n2。 通过本发明实施例确定的码书集合, 可在任意天线端口的二维平面天线阵列时, 向基站反馈相应的信息。 实施例 8
图 10是本发明实施例 8的信息反馈装置构成示意图。 如图 10所示, 装置 1000 包括: 信息确定单元 1001和反馈单元 1002; 其中, 信息确定单元 1001用于根据预 知的天线端口的天线粒子数量和 /或天线端口数量、 利用天线粒子加权所构成的第一 码书集合和 /或天线端口加权所构成的第二码书集合, 确定向基站反馈的天线粒子加 权的信息和 /或天线端口加权的信息;反馈单元 1002用于向基站反馈天线粒子加权的 信息和 /或天线端口加权的信息。
在本实施例中,该天线粒子加权所构成的第一码书集合和该天线端口加权所构成 的第二码书集合如公式 (1 ) 和 (2 ) 所示, 此处不再赘述。
在本实施例中, 该天线粒子加权的信息包括天线粒子加权使用的第一码字索引; 该天线端口加权的信息包括天线端口加权使用的第二码字索引。
1、 在反馈天线粒子加权的信息时:
信息确定单元 1001包括第一査找单元和第一确定单元(图中未示出); 其中, 该 第一査找单元用于根据每个天线端口的天线粒子数量 在天线粒子加权所构成的第 一码书集合中査找相应的天线粒子加权的码书集合;该第二确定单元用于根据估计到 的信道信息、在査找的码书集合中确定向该基站反馈的天线粒子加权采用的第一码字 索引"
2、 在反馈天线端口加权的信息时:
1 ) 预先不知道该天线粒子加权的信息, 该天线粒子加权的信息由基站根据该用 户设备的位置信息, 如垂直方向角度信息等确定该天线粒子加权的信息;
信息确定单元 1001包括: 第二査找单元和第二确定单元 (图中未示出); 其中, 该第二査找单元用于根据预知的每个天线端口使用的天线粒子数量 和天线端口数 量 M, 在天线端口加权所构成的第二码书集合中査找与天线粒子的数量对应的码书 集合; 该第二确定单元用于在査找到的该码书集合中确定该第二码字索引" 2。
2) 预先知道该天线粒子加权的信息
例如, 该天线粒子加权的信息由基站根据该用户设备的位置信息, 如垂直方向角 度信息等确定该天线粒子加权的信息;并且该基站将该天线粒子加权的信息通知该用 户设备。
信息确定单元 1001包括第三査找单元和第三确定单元(图中未示出); 其中, 该 第三査找单元用于根据预知的每个天线端口的天线粒子数量 在天线粒子加权所构 成的第一码书集合中査找相应的天线粒子加权的码书集合;该用户设备根据预知的每 个天线端口的天线粒子数量 和天线端口数量 M在天线端口加权所构成的第二码书 集合中査找相应的天线端口加权的码书集合;该第三确定单元用于根据选择的码书集 合获知码书的尺寸 、 根据选择的码书集合获知码书的尺寸^, 然后根据从基站获 得的该天线粒子加权的信息和码书的尺寸 、 ^确定天线端口加权的信息《2。 如利 用 nj^ = n2/N2来获得该第二码字索引。
在情况 1 ) 和 2) 中, 装置 1000还可包括接收单元 (图中未示出), 该接收单元 用于接收该基站配置的天线粒子数量、 和 /或天线端口数量、 或者接收该基站确定的
该第一码字索引。 此外, 该接收单元可将这些信息存储到存储单元 1003中。
3、 在反馈天线粒子加权的信息和天线端口加权的信息时:
信息确定单元 1001包括第四査找单元、 第四确定单元和第五确定单元 (图中未 示出); 其中,
该第四査找单元用于根据预知的每个天线端口的天线粒子数量 在天线粒子加 权所构成的第一码书集合中査找相应的天线粒子加权的码书集合;该用户设备根据预 知的每个天线端口的天线粒子数量 和天线端口数量 M在天线端口加权所构成的第 二码书集合中査找相应的天线端口加权的码书集合;
第四确定单元用于根据选择的码书集合获知码书的尺寸 根据估计到的信道 信息、在査找的码书集合中确定向该基站反馈的天线粒子加权采用的第一码字索引 "1 第五确定单元用于根据选择的码书集合获知码书的尺寸^, 根据该天线粒子加 权采用的第一码字索引"1和码书的尺寸 、 ^确定天线端口加权的信息《2。
通过本发明实施例确定的码书集合, 可在任意天线端口的二维平面天线阵列时, 向基站反馈相应的信息。 实施例 9
本发明实施例 9还提供一种用户设备,包括实施例 9所述的信息反馈装置,其构 成和作用如实施例 8所述, 此处不再赘述。
图 11是本发明实施例 9的用户设备构成示意图。 如图 11所示, 用户设备 1100 包括: 包括中央处理器 1101和存储器 1105 ; 存储器 1105耦合到中央处理器 1101。 值得注意的是,该图是示例性的;还可以使用其他类型的结构,来补充或代替该结构, 以实现电信功能或其他功能。
在一个实施方式中, 信息反馈装置的功能可以被集成到中央处理器 1101中。 其 中, 中央处理器 1101可以被配置为: 根据预知的天线端口的天线粒子数量和 /或天线 端口数量, 利用天线粒子加权所构成的第一码书集合和 /或天线端口加权所构成的第 二码书集合, 确定向基站反馈的天线粒子加权的信息和 /或天线端口加权的信息; 向 基站反馈天线粒子加权的信息和 /或天线端口加权的信息。
其中具体的确定该天线粒子加权的信息和 /或天线端口加权的信息的方式如实施 例 7所述, 将其内容合并于此, 此处不再赘述。
在另一个实施方式中, 信息反馈装置可以与中央处理器 1101分开配置, 例如可 以将信息反馈装置配置为与中央处理器 1101连接的芯片, 通过中央处理器的控制来 实现信息反馈装置的功能, 如图 11中的信息反馈装置 1102。
如图 11所示, 用户设备 1100还可以包括: 输入单元 1103、 音频处理单元 1104、 显示器 1106、 电源 1107和通信模块 1108, 值得注意的是, 用户设备 1100也并不是 必须要包括图 11中所示的所有部件; 此外, 用户设备 1100还可以包括图 11中没有 示出的部件, 可以参考现有技术。
如图 11所示, 中央处理器 1101有时也称为控制器或操作控件, 可以包括微处理 器或其他处理器装置和 /或逻辑装置, 该中央处理器 1101 接收输入并控制用户设备 1100的各个部件的操作。
其中, 存储器 1140, 例如可以是缓存器、 闪存、 硬驱、 可移动介质、 易失性存 储器、非易失性存储器或其它合适装置中的一种或更多种。可储存上述与失败有关的 信息, 此外还可存储执行有关信息反馈的程序。 并且中央处理器 1101可执行该存储 器 1105存储的该程序, 以实现信息存储或处理等。 其他部件的功能与现有类似, 此 处不再赘述。 用户设备 1100的各部件可以通过专用硬件、 固件、 软件或其结合来实 现, 而不偏离本发明的范围。 实施例 10
本发明实施例 10还提供一种通信***。该通信***包括用户设备和基站; 其中, 该用户设备根据预知的天线端口的天线粒子数量和 /或天线端口数量 M、利用天 线粒子加权所构成的第一码书集合和 /或天线端口加权所构成的第二码书集合, 向基 站反馈天线粒子加权的信息和 /或天线端口加权的信息。 其中, 该用户设备的构成和 各部件的功能如实施例 8和 9所述, 将其内容合并于此, 此处不再赘述。
在本实施例中,该基站用于利用二维平面天线阵列中天线粒子的位置所引起的相 移向量来确定天线粒子加权所构成的第一码书集合、 和 /或天线端口加权所构成的第 二码书集合; 其中, 可采用公式 (1 ) 和 (2)确定, 如实施例 1至 3所述, 此处不再 赘述。
图 12是本发明实施例 10的信息反馈装置结构示意图。 设置于基站侧, 如图 12 所示, 信息反馈装置 1200包括: 信息接收单元 1201, 信息接收单元 1201用于接收
用户设备反馈的天线粒子加权的信息和 /或天线端口加权的信息。
在本实施例中, 如图 12所示, 信息反馈装置 1200还可包括码本确定单元 1202, 码本确定单元 1202 用于确定天线粒子加权所构成的第一码书集合和 /或天线端口加 权所构成的第二码书集合, 具体的确定方法如实施例 1-3所示, 此处不再赘述。 部件 码本确定单元 1202为可选部件, 本实施例也可预先确定码本集合并存储在存储单元 中。
如图 12所示, 信息反馈装置 1200还可包括存储单元 1203, 用于存储信息接收 单元 1201接收到的信息、 以及码本确定单元 1202确定的码本集合。
在本实施例中, 如图 12所示, 信息反馈装置 1200还可包括信息配置单元 1204 和信息发送单元 1205; 其中, 信息配置单元 1204用于配置每个天线端口使用的天线 粒子个数和 /或天线端口数量;信息发送单元 1205用于将配置的天线粒子个数通知用 户设备。 这样, 该用户设备获得该天线粒子个数后, 可根据该信息査找相应的码本, 最终选择天线端口加权的信息。部件信息配置单元 1204和信息发送单元 1205为可选 部件。
在本实施例中, 如图 12所示, 信息反馈装置 1200还可包括信息确定单元 1205, 用于根据用户设备的位置信息来确定天线粒子加权的信息, 并且信息发送单元 1205 将确定的天线粒子加权的信息通知用户设备。这样该用户设备可根据该天线粒子加权 的信息直接确定天线端口加权的信息。 该天线粒子加权的信息如实施例 7、 8所述, 该部件为可选部件。
在本实施例中, 还提供一种基站, 该基站包括图 12所述的信息反馈装置, 用于 接收用户设备反馈的天线粒子加权的信息和 /或天线端口加权的信息。 这样, 该基站 接收到上述信息后, 根据上述信息确定天线粒子加权和 /或天线端口加权, 将天线粒 子加权和 /或天线端口加权应用到给用户设备的信息传输中的预编码操作中。
图 13是本实施例中基站的结构示意图。 如图 13所示, 基站 1300包括上述信息 反馈装置。 如图 13所示, 基站 1300可以包括: 中央处理器 (CPU) 1301和存储器 1302; 存储器 1302耦合到中央处理器 1301。 其中该存储器 1302可存储各种数据; 此外还存储信息反馈的程序、 和 /或码书确定的程序和确定的码书集合, 并且还存储 接收的信息; 在中央处理器 1301的控制下执行该程序, 接收用户设备反馈的信息。
在一个实施方式中, 信息反馈装置的功能可以被集成到中央处理器 1301中。 其
中, 中央处理器 1201可以被配置为: 用于接收用户设备反馈的天线粒子加权的信息 和 /或天线端口加权的信息。
其中, 中央处理器 1301被配置为: 确定天线粒子加权所构成的码书集合和 /或天 线端口加权所构成的码书集合, 具体的确定方法如实施例 1-3所示, 此处不再赘述。
中央处理器 1301被配置为: 用于配置每个天线端口使用的天线粒子个数; 将配 置的天线粒子个数通知用户设备。
中央处理器 1301被配置为: 根据用户设备的位置信息来确定天线粒子加权的信 息, 并且将确定的天线粒子加权的信息通知用户设备。
在另一个实施方式中, 该信息反馈装置 1304可以与中央处理器 1301分开配置, 例如可以将信息反馈装置配置为与中央处理器 1301 连接的芯片, 通过中央处理器 1301的控制来实现信息反馈装置的功能, 如图 13所示的信息反馈装置 1305。
此外,如图 13所示,基站 1300还可以包括: 收发机 1303和天线 1304等;其中, 上述部件的功能与现有技术类似, 此处不再赘述。 值得注意的是, 基站 1300也并不 是必须要包括图 13中所示的所有部件; 此外, 基站 1300还可以包括图 13中没有示 出的部件, 可以参考现有技术。
为了更好地支持多天线用户 (MU-MIMI) 技术, 在本实施例中, 该用户设备还用 于在传输数据通道、 和 /或公共信道或信号时, 在频域上进行天线粒子加权。 因此, 基于上述实施例, 该用户设备还包括信息处理单元(未示出), 用于在传输数据通道、 和 /或公共信道或信号时, 在频域上进行天线粒子加权。
在本实施例中, 不同的用户设备采用的天线粒子加权不同,这样每个用户设备可 自适应调节垂直方向波束的指向。
在传输公共信道或信号时,如物理广播信道(PBCH)、物理下行控制信道(PDCCH)、 不使用解调参考信号(DMRS)解调的物理下行数据信道(PDSCH)、 小区特定参考信号 (CRS)等, 若使用 UE特定的天线粒子加权, 将出现发送信号指向特定方向, 从而导 致覆盖范围较小, 为解决这一问题, 可采用如下天线粒子加权向量、 或者如下天线粒 子加权向量的 个加权值循环移位后构成的向量进行天线粒子加权; 值和前面一 样, 均为一个天线端口内的天线粒子个数, 也就是天线粒子加权向量的维度。
该向量为:
Ι/Λ/0[1,0,···,0,1,0,···,0,···,1,0,···,0]Γ
; 其中, 6为加权向量中 1 的个数, 且 6为
可以被 整除的正整数。
[1,0,0,· · · , Of [0,1, 0,0,· · · , of
在 6 = 1时, 天线粒子加权向量为 或 ; l/V2 [l, 0, 0, - - -, 0,1,0,0,· · ·, Of
在 6 = 2时, 天线粒子加权向量为 ; 在 6 = / 2时, 天线粒子加权向量为 ^^^^,^,… 。 在上述实施例中, 不同实施例的用户设备、 基站的各个部件可合并。
本发明实施例还提供一种计算机可读程序,其中当在码本确定装置或基站中执行 所述程序时,所述程序使得计算机在所述码本确定装置或基站中执行实施例 1~3所述 的码本确定方法。
本发明实施例还提供一种存储有计算机可读程序的存储介质,其中所述计算机可 读程序使得计算机在码本确定装置或基站中执行实施例 1~3所述的码本确定方法。
本发明实施例还提供一种计算机可读程序,其中当在信息装置或用户设备中执行 所述程序时, 所述程序使得计算机在所述信息反馈装置或用户设备中执行实施例 7 所述的信息反馈方法。
本发明实施例还提供一种存储有计算机可读程序的存储介质,其中所述计算机可 读程序使得计算机在信息反馈装置或用户设备中执行实施例 7所述的信息反馈方法。
本发明以上的装置和方法可以由硬件实现, 也可以由硬件结合软件实现。本发明 涉及这样的计算机可读程序, 当该程序被逻辑部件所执行时, 能够使该逻辑部件实现 上文所述的装置或构成部件, 或使该逻辑部件实现上文所述的各种方法或步骤。逻辑 部件例如现场可编程逻辑部件、微处理器、 计算机中使用的处理器等。本发明还涉及 用于存储以上程序的存储介质, 如硬盘、 磁盘、 光盘、 DVD、 flash存储器等。
以上结合具体的实施方式对本发明进行了描述,但本领域技术人员应该清楚,这 些描述都是示例性的, 并不是对本发明保护范围的限制。本领域技术人员可以根据本 发明的精神和原理对本发明做出各种变型和修改,这些变型和修改也在本发明的范围 内。
Claims
1、 一种码书确定装置, 包括:
码书确定单元, 所述码书确定单元用于确定天线粒子加权所构成的第一码书集 合、 和 /或天线端口加权所构成的第二码书集合; 其中,
在公式 (1) 和 (2) 中, 表示电磁波波长; 表示垂直方向天线粒子的间距; 是垂直方向构成的一个天线端口的天线粒子数量, 为大于零的正整数;
表示垂直方向构成一个天线端口的天线粒子的索引,取值范围为 [1, Κ], 为 天线粒子加权所构成的码书的尺寸大小, 表示采用的码字在天线粒子加权构成的码 书集合中的天线粒子加权索引;
«表示调整因子; Μ表示垂直方向天线端口的数量, w为所在天线端口的索引, 取值范围为 [1, Μ], Μ为大于零的正整数; ^为天线端口加权所构成的码书的尺 寸大小, "2表示采用的码字在天线端口加权构成的码书集合中的天线端口加权索引。
2、 根据权利要求 1所述的装置, 其中, 针对垂直方向的一列同一极化的天线配 置, 在秩等于 1时, 所述调整因子《等于 1。
3、 根据权利要求 1所述的装置, 其中, 针对交叉极化天线配置且同一列天线粒 子具有不同极化方向, 在秩等于 1时, 所述调整因子 "为第一相移因子;
?J2m^(n3 =0,l,---,N3-l)
所述第一相移因子表示为: :述公式 (2) 表示为 u
或者表示为:
U 0
W, U u„+ 为天线端口加权的序号为" ι+χ的码 0 U
字, X为大于等于 1的正整数, W2 =[e,., 2 /A¾ ei] , 其中 e '为第 个元素为 1, 其它 元素为 0的 xl维单位列向量。
4、 根据权利要求 1所述的装置, 其中, 针对垂直方向的一列以上的天线阵列,
其中的第一列天线,所述调整因子为第一调整因子; 所述第一列天线以外的其他列天 线, 所述调整因子为第二调整因子, 不同列的第二调整因子相同或不同。
5、 根据权利要求 2或 3或 4所述的装置, 其中, 在秩大于 1时, 所述码书确定 单元用于利用确定的秩等于 1 时的天线端口加权所构成的第二码书集合来确定秩大 于 1时的天线端口加权所构成的第二码书集合。
6、 根据权利要求 1所述的装置, 其中, 所述第一码书集合和所述第二码书集合 中的码书的尺寸相同或不同。
7、 根据权利要求 1所述的装置, 其中, 所述第一码书集合和所述第二码书集合 中码书的尺寸、 以及采用的码字的索引之间满足如下关系: "ι/ "2 /^2相同或近 似相同。
8、 根据权利要求 1所述的装置, 其中, 所述装置还包括通知单元, 所述通知单 元用于将确定的所述天线粒子加权所构成的第一码书集合和所述天线端口加权所构 成的第二码书集合通知用户设备。
9、 一种信息反馈装置, 包括:
信息确定单元,所述信息确定单元用于根据预知的每个天线端口的天线粒子数量 和 /或天线端口数量、利用天线粒子加权所构成的第一码书集合和 /或天线端口加权所 构成的第二码书集合, 确定向基站反馈的天线粒子加权的信息和 /或天线端口加权的 in息;
反馈单元, 所述反馈单元用于向基站反馈天线粒子加权的信息和 /或天线端口加 权的信息。
10、 根据权利要求 9所述的装置, 其中,
在公式 (1 ) 和 (2 ) 中, 表示电磁波波长; 表示垂直方向天线粒子的间距; 是垂直方向构成的一个天线端口的天线粒子数量, 为大于零的正整数;
表示垂直方向构成一个天线端口的天线粒子的索引,取值范围为 [1, Κ ] ,
天线粒子加权所构成的码书的尺寸大小, 表示采用的码字在天线粒子加权构成的码 书集合中的天线粒子加权索引;
«表示调整因子; M表示垂直方向天线端口的数量, W为所在天线端口的索引, 取值范围为 [1, M ] , M为大于零的正整数; ^为天线端口加权所构成的码书的尺 寸大小, "2表示采用的码字在天线端口加权构成的码书集合中的天线端口加权索引。
11、 根据权利要求 9所述的装置, 其中, 所述天线粒子加权的信息包括天线粒子 加权使用的第一码字索引;
所述信息确定单元包括第一査找单元和第一确定单元; 其中,
所述第一査找单元用于根据所述天线粒子数量在所述第一码书集合中査找相应 的天线粒子加权的码书集合;
所述第二确定单元用于根据估计到的信道信息、在査找的码书集合中确定向所述 基站反馈的天线粒子加权采用的第一码字索引。
12、 根据权利要求 9所述的装置, 其中, 所述天线端口加权的信息包括天线端口 加权使用的第二码字索引;
所述信息确定单元包括第二査找单元和第二确定单元; 其中,
所述第二査找单元用于根据所述天线粒子数量和天线端口数量,在所述第二码书 集合中査找与天线粒子数量对应的码书集合;所述第二确定单元用于在査找到的码书 集合中确定该第二码字索引; 或者,
所述信息确定单元包括第三査找单元和第三确定单元; 其中,
所述第三査找单元用于根据预知的每个天线端口的天线粒子数量在所述第一码 书集合中査找相应的天线粒子加权的码书集合;根据预知的每个天线端口的天线粒子 数量和天线端口数量在所述第二码书集合中査找相应的天线端口加权的码书集合;所 述第三确定单元用于根据选择的码书集合获知相应的码书的尺寸,根据从基站获得的 所述天线粒子加权的信息和码书的尺寸确定所述天线端口加权的信息。
13、 根据权利要求 12所述的装置, 其中, 所述装置还包括接收单元, 所述接收 单元用于接收所述基站配置的所述天线粒子的数量、 和 /或天线端口数量、 或者接收 所述基站确定的所述天线粒子加权的信息。
14、 根据权利要求 9所述的装置, 其中, 所述天线端口加权的信息包括天线端口 加权使用的第二码字索引;所述天线粒子加权的信息包括天线粒子加权使用的第一码
字索引;
所述信息确定单元包括第四査找单元、 第四确定单元和第五确定单元; 其中, 所述第四査找单元用于根据预知的所述天线粒子数量在所述第一码书集合中査 找相应的天线粒子加权的码书集合;根据预知所述天线粒子数量和天线端口数量在所 述第二码书集合中査找相应的天线端口加权的码书集合;
所述第四确定单元用于根据选择的码书集合获知码书的尺寸;根据估计到的信道 信息、 在査找的码书集合中确定向该基站反馈的天线粒子加权采用的第一码字索引; 第五确定单元用于根据选择的码书集合获知码书的尺寸,根据所述天线粒子加权 采用的第一码字索引、 码书的尺寸确定天线端口加权的信息。
15、 一种通信***, 包括基站, 其中, 所述通信***还包括用户设备, 所述用户 设备根据预知的每个天线端口的天线粒子数量、利用天线粒子加权所构成的第一码书 集合和 /或天线端口加权所构成的第二码书集合,向基站反馈天线粒子加权的信息和 / 或天线端口加权的信息。
16、 根据权利要求 15所述的通信***, 其中, 所述基站用于确定所述第一码书 集合和第二码书集合; 其中,
在公式 (1 ) 和 (2 ) 中, 表示电磁波波长; 表示垂直方向天线粒子的间距; 是垂直方向构成的一个天线端口的天线粒子数量, 为大于零的正整数;
表示垂直方向构成一个天线端口的天线粒子的索引,取值范围为 [1, Κ ] , 为 天线粒子加权所构成的码书的尺寸大小, 表示采用的码字在天线粒子加权构成的码 书集合中的天线粒子加权索引;
«表示调整因子; M表示垂直方向天线端口的数量, w为所在天线端口的索引, 取值范围为 [1, M ] , M为大于零的正整数; ^为天线端口加权所构成的码书的尺 寸大小, "2表示采用的码字在天线端口加权构成的码书集合中的天线端口加权索引。
17、 根据权利要求 15所述的通信***, 其中, 所述用户设备还用于在传输数据
通道、 和 /或公共信道或信号时, 在频域上进行天线粒子加权。
18、 根据权利要求 15所述的通信***, 其中, 不同的用户设备采用的天线粒子 加权不同。
19、 根据权利要求 15所述的通信***, 其中, 在传输公共信道或信号时, 采用 如下天线粒子加权向量、或者如下天线粒子加权向量的 个加权值循环移位后构成的 向量进行天线粒子加权; 所述向量为: ι/νό [ΐ,ο,···,ο,ι,ο,···,ο,···,ι,ο,···,ο]Γ;
、 、 、 其中, 是垂直方向构成的一个天线端口的天线粒子数量, 6为加权向量中 1的 个数, 且 6为可以被 整除的正整数。
20、 根据权利要求 19所述的通信***, 其中,
[1,0,0,···, Of [0,1, 0,0,···, of
在 6 = 1时, 天线粒子加权向量为 或 ; l/V2[l,0,0,---, 0,1,0,0,···, Of
在 6 = 2时, 天线粒子加权向量为 . 在 6 = / 2时, 天线粒子加权向量为 ^^^^,^,… 。
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