CN109412660B - Large-scale antenna transmission method, base station, user terminal and large-scale antenna system - Google Patents

Large-scale antenna transmission method, base station, user terminal and large-scale antenna system Download PDF

Info

Publication number
CN109412660B
CN109412660B CN201710694152.XA CN201710694152A CN109412660B CN 109412660 B CN109412660 B CN 109412660B CN 201710694152 A CN201710694152 A CN 201710694152A CN 109412660 B CN109412660 B CN 109412660B
Authority
CN
China
Prior art keywords
user group
unicast
broadcast
area
zone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201710694152.XA
Other languages
Chinese (zh)
Other versions
CN109412660A (en
Inventor
武巍
齐飞
朱雪田
李艳芬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Telecom Corp Ltd
Original Assignee
China Telecom Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Telecom Corp Ltd filed Critical China Telecom Corp Ltd
Priority to CN201710694152.XA priority Critical patent/CN109412660B/en
Publication of CN109412660A publication Critical patent/CN109412660A/en
Application granted granted Critical
Publication of CN109412660B publication Critical patent/CN109412660B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • H04B7/0452—Multi-user 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
    • 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
    • H04B7/068—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 using space frequency diversity
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a large-scale antenna transmission method, a base station, a user terminal and a large-scale antenna system. The method comprises the following steps: the base station divides users in a coverage area of the base station into a near area broadcast user group, a far area broadcast user group, a near area unicast user group and a far area unicast user group; the base station superposes the near area unicast user group signal to the broadcast user group signal, wherein the broadcast user group signal comprises a near area broadcast user group signal and a far area broadcast user group signal; and the base station sends a sending signal to a corresponding user terminal, wherein the sending signal comprises a unicast user group signal and a broadcast user group signal. The invention can greatly expand the connectable user number of the MassiveMIMO system by superposing the NOMA user signal to the broadcast group user group and sending the NOMA user signal together. The invention also greatly increases the flexibility of the system, improves the utilization rate of channels, improves the throughput of the system and increases the number of service users.

Description

Large-scale antenna transmission method, base station, user terminal and large-scale antenna system
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a large-scale antenna transmission method, a base station, a user terminal, and a large-scale antenna system.
Background
In a wireless communication system, masivemimo (large-scale multiple input multiple output system) technology can greatly improve system throughput, and a linear precoding technology can be used for eliminating interference among unicast users to realize multi-user MIMO (MU-MIMO, multi-user multiple input multiple output system) so as to further increase flexibility and channel utilization rate of the system. Since masivemimo technology can greatly improve system performance and spectrum efficiency, masivemimo technology is also considered as one of the core technologies of 5G and is widely studied.
NOMA is a non-orthogonal multiple access technique, widely discussed in the 5G potential, and has great significance in improving system throughput and increasing the number of service users.
Therefore, how to effectively combine the NOMA and MassiveMIMO technologies to further increase the flexibility and channel utilization rate of the system, improve the throughput of the system, and increase the number of users served thereby is a technical problem to be solved urgently at present.
Disclosure of Invention
In view of the above technical problems, the present invention provides a large-scale antenna transmission method, a base station, a user terminal, and a large-scale antenna system, in which NOMA user signals are superimposed on a broadcast group user group and transmitted together, thereby increasing the number of service users.
According to an aspect of the present invention, there is provided a large-scale antenna transmission method, including:
the base station divides users in a coverage area of the base station into a near area broadcast user group, a far area broadcast user group, a near area unicast user group and a far area unicast user group;
the base station superposes the near area unicast user group signal to the broadcast user group signal, wherein the broadcast user group signal comprises a near area broadcast user group signal and a far area broadcast user group signal;
and the base station sends a sending signal to a corresponding user terminal, wherein the sending signal comprises a unicast user group signal and a broadcast user group signal.
In one embodiment of the present invention, the base station transmitting the user signal to the corresponding user terminal includes:
the base station carries out precoding on the sending signals by adopting a user precoding matrix;
the base station modulates the pre-coded transmission signal into a radio frequency signal;
and the base station sends the modulated radio frequency signal out from the corresponding port.
In an embodiment of the present invention, the precoding, by the base station, the transmission signal by using the user precoding matrix includes:
the base station adds a first transmission vector and a second transmission vector to form a transmission signal vector, wherein the first transmission vector is formed by near area broadcast group information, far area broadcast group information and far area unicast group information, and the second transmission vector is formed by first near area unicast group information, second near area unicast group information and a zero matrix;
the base station determines a user precoding matrix according to the user channel vector, the zero space vector and the original precoding matrix;
and the base station carries out precoding on the transmitted signal vector according to the user precoding matrix.
In an embodiment of the present invention, the user channel vector is a column vector composed of a near-zone broadcast user group matrix, a far-zone unicast user group matrix, and a near-zone unicast user group matrix.
In an embodiment of the present invention, the null space vector is a row vector formed by a first null space matrix, a second null space matrix and a third null space matrix, wherein the first null space matrix is a null space matrix of a far-zone broadcast user group matrix and a far-zone unicast user group matrix, the second null space matrix is a null space matrix of a near-zone broadcast user group matrix and a far-zone unicast user group matrix, and the third null space matrix is a null space matrix of a near-zone broadcast user group matrix, a far-zone broadcast user group matrix and a far-zone unicast user group matrix.
In one embodiment of the present invention, the original precoding matrix is a block diagonal matrix, wherein the near-zone broadcast precoding matrix, the far-zone broadcast precoding matrix and the far-zone unicast precoding matrix are respectively located at diagonal positions of the block diagonal matrix.
In an embodiment of the present invention, a vector formed by the first near area unicast group information and the second near area unicast group information is obtained by processing an original near area unicast signal by using a specific matrix, where the specific matrix is a generalized inverse matrix of a vector formed by the first precoding matrix and the second precoding matrix, the first precoding matrix is a product of a near area unicast user group matrix, the first null space matrix and a near area broadcast precoding matrix, and the second precoding matrix is a product of a near area unicast user group matrix, the second null space matrix and a far area broadcast precoding matrix.
In one embodiment of the invention, the near-zone unicast user group is a non-orthogonal multiple access user group.
In one embodiment of the invention, the method further comprises:
a near area unicast user terminal receives a near area unicast user group receiving signal, wherein the near area unicast user group receiving signal comprises broadcast group information and a near area unicast signal, and the near area unicast signal comprises an orthogonal unit array and an original near area unicast signal;
near-zone unicast user terminals employ successive interference cancellation to cancel broadcast group information.
In one embodiment of the invention, the method further comprises:
a near area broadcast user terminal receives a near area broadcast user group receiving signal, wherein the near area broadcast user group receiving signal comprises a near area broadcast signal and a near area unicast signal;
the near zone broadcast unicast user terminal removes the near zone unicast signal as noise.
In one embodiment of the invention, the method further comprises:
a remote broadcast user terminal receives a remote broadcast user group receiving signal, wherein the remote broadcast user group receiving signal comprises a remote broadcast signal and a near unicast signal;
the far-zone broadcast unicast user terminal removes the near-zone unicast signal as noise.
In one embodiment of the invention, the method further comprises:
and the remote area unicast user terminal receives remote area unicast user group receiving signals, wherein the remote area unicast user group receiving signals comprise remote area unicast signals.
According to another aspect of the present invention, there is provided a base station comprising:
the base band processing unit is used for dividing users in a coverage area of the base station into a near area broadcast user group, a far area broadcast user group, a near area unicast user group and a far area unicast user group; and superimposing the near area unicast user group signal to the broadcast user group signal, wherein the broadcast user group signal comprises a near area broadcast user group signal and a far area broadcast user group signal;
and the large-scale antenna array is used for transmitting the transmission signals to the corresponding user terminal, wherein the transmission signals comprise unicast user group signals and broadcast user group signals.
In one embodiment of the present invention, the base station further includes a radio frequency unit, wherein:
the baseband processing unit is also used for precoding the sending signals by adopting a user precoding matrix;
a radio frequency unit, configured to modulate the precoded transmission signal into a radio frequency signal;
and the large-scale antenna array is used for sending the modulated radio-frequency signals out from the corresponding ports.
In one embodiment of the present invention, a baseband processing unit includes:
a transmission vector determining module, configured to add a first transmission vector and a second transmission vector to form a transmission signal vector, where the first transmission vector is a vector formed by near-area broadcast group information, far-area broadcast group information, and far-area unicast group information, and the second transmission vector is a vector formed by first near-area unicast group information, second near-area unicast group information, and a zero matrix;
the pre-coding matrix determining module is used for determining a user pre-coding matrix according to the user channel vector, the zero space vector and the original pre-coding matrix;
and the precoding module is used for precoding the transmitted signal vector according to the user precoding matrix.
In an embodiment of the present invention, the user channel vector is a column vector composed of a near-zone broadcast user group matrix, a far-zone unicast user group matrix, and a near-zone unicast user group matrix.
In an embodiment of the present invention, the null space vector is a row vector formed by a first null space matrix, a second null space matrix and a third null space matrix, wherein the first null space matrix is a null space matrix of a far-zone broadcast user group matrix and a far-zone unicast user group matrix, the second null space matrix is a null space matrix of a near-zone broadcast user group matrix and a far-zone unicast user group matrix, and the third null space matrix is a null space matrix of a near-zone broadcast user group matrix, a far-zone broadcast user group matrix and a far-zone unicast user group matrix.
In one embodiment of the present invention, the original precoding matrix is a block diagonal matrix, wherein the near-zone broadcast precoding matrix, the far-zone broadcast precoding matrix and the far-zone unicast precoding matrix are respectively located at diagonal positions of the block diagonal matrix.
In an embodiment of the present invention, a vector formed by the first near area unicast group information and the second near area unicast group information is obtained by processing an original near area unicast signal by using a specific matrix, where the specific matrix is a generalized inverse matrix of a vector formed by the first precoding matrix and the second precoding matrix, the first precoding matrix is a product of a near area unicast user group matrix, the first null space matrix and a near area broadcast precoding matrix, and the second precoding matrix is a product of a near area unicast user group matrix, the second null space matrix and a far area broadcast precoding matrix.
In one embodiment of the invention, the near-zone unicast user group is a non-orthogonal multiple access user group.
According to another aspect of the present invention, there is provided a near zone unicast user terminal, comprising:
the near area unicast signal receiving module is used for receiving a near area unicast user group receiving signal, wherein the near area unicast user group receiving signal comprises broadcast group information and a near area unicast signal, and the near area unicast signal comprises an orthogonal unit array and an original near area unicast signal;
and the serial interference elimination module is used for eliminating the broadcast group information by adopting serial interference elimination.
According to another aspect of the present invention, there is provided a near zone broadcast user terminal comprising:
the near area broadcast signal receiving module is used for receiving near area broadcast user group receiving signals, wherein the near area broadcast user group receiving signals comprise near area broadcast signals and near area unicast signals;
and the near-region broadcast noise removal module is used for removing the near-region unicast signals as noise.
According to another aspect of the present invention, there is provided a remote area broadcast user terminal comprising:
the remote broadcast signal receiving module is used for receiving remote broadcast user group receiving signals, wherein the remote broadcast user group receiving signals comprise remote broadcast signals and near unicast signals;
and the far-zone broadcast noise removal module is used for removing the near-zone unicast signals as noise.
According to another aspect of the present invention, there is provided a remote area unicast user terminal for receiving remote area unicast user group reception signals, wherein the remote area unicast user group reception signals include remote area unicast signals.
According to another aspect of the present invention, there is provided a large-scale antenna system, comprising user terminals and a base station as in any one of the above embodiments, wherein the user terminals comprise at least one of a near-zone unicast user terminal as in any one of the above embodiments, a near-zone broadcast user terminal as in any one of the above embodiments, a far-zone broadcast user terminal as in any one of the above embodiments, and a far-zone unicast user terminal as in any one of the above embodiments.
The invention can greatly expand the connectable user number of the MassiveMIMO system by superposing the NOMA user signal to the broadcast group user group and sending the NOMA user signal together. The invention also greatly increases the flexibility of the system, improves the utilization rate of channels, improves the throughput of the system and increases the number of service users.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a large-scale antenna system according to a first embodiment of the present invention.
Fig. 2 is a schematic diagram of a large-scale antenna system according to a second embodiment of the present invention.
Fig. 3 is a diagram illustrating a base station according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a baseband processing unit according to an embodiment of the present invention.
Fig. 5 is a diagram illustrating a large-scale antenna system model according to an embodiment of the present invention.
Fig. 6 is a diagram illustrating a transmission channel model of a large-scale antenna system according to an embodiment of the present invention.
FIG. 7 is a diagram of null-space division in an embodiment of the invention.
Fig. 8 is a diagram illustrating an embodiment of a near area unicast user terminal according to the present invention.
Fig. 9 is a diagram illustrating a near zone unicast ue reception model according to an embodiment of the present invention.
Fig. 10 is a diagram illustrating obtaining near zone unicast group information according to an embodiment of the present invention.
Fig. 11 is a diagram illustrating a near area unicast ue reception model according to another embodiment of the present invention.
Fig. 12 is a diagram illustrating a near-field broadcast ue according to an embodiment of the present invention.
Fig. 13 is a diagram of a remote broadcast user terminal according to an embodiment of the present invention.
Fig. 14 is a diagram illustrating a large-scale antenna transmission method according to a first embodiment of the present invention.
Fig. 15 is a diagram illustrating a large-scale antenna transmission method according to a second embodiment of the present invention.
Fig. 16 is a diagram illustrating precoding operation within a near area broadcast user group according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic diagram of a large-scale antenna system according to a first embodiment of the present invention. As shown in fig. 1, the large-scale antenna system includes a base station 100 and a user terminal 200, wherein:
a base station 100, configured to divide a coverage area of the base station into two areas: near-area and Far-area; and dividing the users in the coverage area of the base station into a near area broadcast user group, a far area broadcast user group, a near area unicast user group and a far area unicast user group.
Fig. 2 is a schematic diagram of a large-scale antenna system according to a second embodiment of the present invention. As shown in fig. 2, the user terminal 200 of the embodiment of fig. 1 may include at least one of a near area unicast user terminal 210, a near area broadcast user terminal 220, a far area broadcast user terminal 230, and a far area unicast user terminal 240.
A base station 100 for superimposing a near area unicast user group signal onto a broadcast user group signal, wherein the broadcast user group signal includes a near area broadcast user group signal and a far area broadcast user group signal; and transmitting a transmission signal to a corresponding user terminal, wherein the transmission signal includes a unicast user group signal and a broadcast user group signal.
In one embodiment of the invention, the near-zone unicast user group is a non-orthogonal multiple access (NOMA) user group.
The near zone broadcast user terminal 220 and the far zone broadcast user terminal 230() (superimposed broadcast users) for processing the NOMA user signal as noise at the time of reception without any modification of the reception flow.
Near area unicast user terminals 210(NOMA users) are used to cancel the effects of broadcast groups and interference within NOMA users using successive interference cancellation and precoding techniques.
Based on the large-scale antenna system of the piggyback NOMA technology based on the serial interference elimination, which is provided by the embodiment of the invention, NOMA user signals are superposed on a broadcasting group user group and are transmitted together, and the interference to the broadcasting user is reduced through power control. For the superimposed broadcast users, the NOMA user signal is treated as noise during reception, and the receiving flow is not modified. For NOMA users, serial interference elimination and precoding technology is utilized to eliminate the influence of broadcast groups and the interference inside NOMA users.
The embodiment of the invention can greatly expand the connectable user number of the MassiveMIMO system. The embodiment of the invention greatly increases the flexibility of the system, improves the utilization rate of the channel, improves the throughput of the system and increases the number of service users.
The structure and function of the base station and the user terminal in the above embodiments of the present invention are further described in the following with specific embodiments.
Fig. 3 is a diagram illustrating a base station according to an embodiment of the present invention. As shown in fig. 3, the base station 100 of the embodiment of fig. 1 or fig. 2 may include a baseband processing unit 110, a radio frequency unit 120, and a massive antenna array 130, where:
a baseband processing unit 110, configured to divide users in a coverage area of the base station 100 into a near-zone broadcast user group, a far-zone broadcast user group, a near-zone unicast user group, and a far-zone unicast user group; and superimposing the near area unicast user group signal to the broadcast user group signal, wherein the broadcast user group signal comprises a near area broadcast user group signal and a far area broadcast user group signal; and precoding a transmission signal by adopting a user precoding matrix, wherein the transmission signal comprises a near area unicast user group signal, a far area unicast user group signal, a near area broadcast user group signal and a far area broadcast user group signal.
In one embodiment of the invention, the near-zone unicast user group is a non-orthogonal multiple access user group.
The rf unit 120 is configured to modulate the transmission signal precoded by the baseband processing unit 110 into a radio frequency signal.
And the large-scale antenna array 130 is used for transmitting the modulated radio frequency signals from the corresponding ports to the corresponding user terminals.
Based on the base station provided by the above embodiment of the present invention, the NOMA user signal is superimposed to the broadcast group user group and transmitted together, and the interference to the broadcast user is reduced through power control. For the overlapped broadcasting users, the method overlaps NOMA users to the broadcasting users in a MassiveMIMO system based on a serial interference elimination method, thereby greatly increasing the number of the system service users.
Fig. 4 is a schematic diagram of a baseband processing unit according to an embodiment of the present invention. As shown in fig. 4, the baseband processing unit 110 in the embodiment of fig. 3 may include a transmission vector determining module 110, a precoding matrix determining module 120, and a precoding module 130, where:
a transmission vector determining module 110, configured to add a first transmission vector and a second transmission vector to form a transmission signal vector, where the first transmission vector is a vector S formed by near area broadcast group information a, far area broadcast group information B, and far area unicast group information, as shown in fig. 5 and 6fThe second sending vector is the first near zone unicast group information S1Second near zone unicast group information S2And a vector of zero matrices, wherein the first near zone unicast group information S1Second near zone unicast group information S2Is NOMA group information superimposed on a broadcast group.
A pre-coding matrix determining module 120, configured to determine a user pre-coding matrix according to the user channel vector, the zero-space vector, and the original pre-coding matrix.
Fig. 5 is a diagram illustrating a large-scale antenna system model according to an embodiment of the present invention. Fig. 6 is a diagram illustrating a transmission channel model of a large-scale antenna system according to an embodiment of the present invention. Wherein, the embodiment of fig. 5 gives a schematic diagram of the user channel vector, the null space vector and the original precoding matrix, and fig. 6 gives a schematic diagram of the user precoding matrix determined by the user channel vector, the null space vector and the original precoding matrix. The received signal vector in the embodiments of fig. 5 and 6 is the near zone broadcast user reception matrix Y1Remote broadcast user receiving matrix Y2Remote area unicast user receiving matrix YfAnd near zone unicast user reception matrix YnComposed column vector
As shown in fig. 5, the user channel vector is a near-zone broadcast user group matrix M1Remote broadcast subscriber group matrix M2Remote area unicast user group matrix UfAnd near zone unicast user group matrix UnA column vector of components.
In the FIG. 5 embodiment, the original precoding matrix is a block diagonal matrix, where the near-zone broadcast precoding matrix P1Remote area broadcast precoding matrix P2And far zone unicast precoding matrix PfRespectively at diagonal positions of the block diagonal matrix.
In the embodiment of FIG. 5, the null-space vector is the first null-space matrix J1A second null-space matrix J2And a third null-space matrix JfThe constructed row vector.
FIG. 7 is a diagram of null-space division in an embodiment of the invention. As shown in fig. 7, the groups of the present application are distinguished from each other by null space, wherein:
first null-space matrix J1(with near-field broadcast subscriber group matrix M1Corresponding) as far zone broadcast subscriber group matrix M2And remote unicast subscriber group matrix UfA null space matrix of (a).
I.e. M2J1＝0，UfJ1＝0。
Second null-space matrix J2(with remote broadcast subscriber group matrix M2Corresponding) as a near zone broadcast user group matrix M1And remote unicast subscriber group matrix UfA null space matrix of (a).
I.e. M1J2＝0，UfJ2＝0。
Third null-space matrix Jf(with remote unicast user group matrix UfCorresponding) as a near zone broadcast user group matrix M1Remote broadcast subscriber group matrix M2And near zone unicast user group matrix UnA null space matrix of (a). I.e. M1Jf＝0，M1Jf＝0，UnJ2＝0。
Fourth null-space matrix Jn(and near-field unicast user group matrix UnCorresponding) as far zone unicast user group matrix UfA null space matrix of (a). I.e. MfJn＝0。
A precoding module 130, configured to precode the transmission signal vector according to the user precoding matrix, as shown in fig. 6.
Therefore, the present invention can perform corresponding precoding operations on the near area broadcast user group, the far area broadcast user group, the near area unicast user group and the far area unicast user group according to the user precoding matrix in the embodiment of fig. 6.
Fig. 16 is a diagram illustrating precoding operation within a near area broadcast user group according to an embodiment of the present invention. As shown in fig. 16, the precoding operation may include: broadcasting of user group matrix M by near zone1And a first null-space matrix J1Generating near-zone broadcast user group equivalent matrix M'1(ii) a According to near-region broadcast user group equivalent matrix M'1Broadcasting precoding matrix P to near zone1Processing to obtain a new near-field broadcast precoding matrix M1J1P1(ii) a So as to then use the new near-zone broadcast precoding matrix M1J1P1The near zone broadcast signal a is processed.
The invention can adopt similar methods to carry out the pre-coding operation in the group for the far-zone broadcast user group, the near-zone unicast user group and the far-zone unicast user group, and the detailed description is not provided.
The embodiment of the invention can greatly expand the connectable user number of the MassiveMIMO system. The embodiment of the invention greatly increases the flexibility of the system, improves the utilization rate of the channel, improves the throughput of the system and increases the number of service users.
The embodiment of the invention does not limit the implementation mode of precoding, has great flexibility, and has good compatibility with the existing MIMO precoding algorithm.
Fig. 8 is a diagram illustrating an embodiment of a near area unicast user terminal according to the present invention. As shown in fig. 8, the near zone unicast user terminal 210 may include a near zone unicast signal receiving module 211 and a successive interference cancellation module 212, where:
a near area unicast signal receiving module 211, configured to receive a near area unicast user group receiving signal, where the near area unicast user group receiving signal includes broadcast group information and a near area unicast signal, and the near area unicast signal includes an orthogonal unit array and an original near area unicast signal.
Fig. 9 is a diagram illustrating a near zone unicast ue reception model according to an embodiment of the present invention. The receiving model of the embodiment of fig. 9 can be obtained by calculating the transmission channel model of the large-scale antenna system of the embodiment of fig. 6.
Fig. 10 is a diagram illustrating obtaining near zone unicast group information according to an embodiment of the present invention. As shown in fig. 10, the first near zone unicast group information S1And second near zone unicast group information S2The formed vector is a unicast signal S of the original near zone by adopting a specific matrixnThe specific matrix is a generalized inverse matrix of a vector formed by a first precoding matrix and a second precoding matrix, and the first precoding matrix is a near area unicast user group matrix UnFirst null-space matrix J1And near zone broadcast precoding matrix P1Is multiplied byProduct, the second pre-coding matrix is near-zone unicast user group matrix UnA second null-space matrix J2And a remote zone broadcast precoding matrix P2The product of (a).
A successive interference cancellation module 212 for canceling the broadcast group information using successive interference cancellation.
Fig. 11 is a diagram illustrating a near area unicast ue reception model according to another embodiment of the present invention. The reception model shown in fig. 11 can be obtained by substituting the formula of fig. 10 into the reception model of fig. 9.
In the embodiment of fig. 11, the first portion of the received signal is broadcast group information, and this portion of the interference may be removed using successive interference cancellation. For example: if the near zone unicast user terminal knows the first null-space matrix J1And a second null-space matrix J2The near-field unicast user terminal may cancel this portion of interference using successive interference cancellation. And the channel parts of the second part are subjected to a precoding process as shown in fig. 11 to be an orthogonal unit array.
The near area unicast user terminal based on the above embodiment of the invention can eliminate the influence of the broadcast group and the interference inside the NOMA user by using the serial interference elimination and precoding technology.
Fig. 12 is a diagram illustrating a near-field broadcast ue according to an embodiment of the present invention. As shown in fig. 12, the near zone broadcast user terminal 220 may include a near zone broadcast signal receiving module 221 and a near zone broadcast noise removing module 222, wherein:
a near zone broadcast signal receiving module 221, configured to receive a near zone broadcast user group receiving signal, where the near zone broadcast user group receiving signal includes a near zone broadcast signal and a near zone unicast signal.
In an embodiment of the present invention, a receiving model of a near-field broadcast ue may be obtained through a large-scale antenna system transmission channel model calculation according to the embodiment of fig. 6, which is specifically shown in formula (1).
Y1＝M1J1P1·A+M1J1P1·S1(1)
Wide near zoneA broadcast noise removal module 222 for removing the near zone unicast signal M1J1P1·S1As noise removal.
Based on the near-area broadcast user terminal of the above embodiment of the present invention, the NOMA user signal can be treated as noise during receiving, and the receiving process is not modified.
In one embodiment of the present invention, the first near zone unicast group information S in formula (1) can be made1Is 0.
Therefore, the above embodiments of the present invention can enable the broadcast group in the near area to use the normal broadcast pre-coding technology; and the broadcast user in the far zone is favorable for serial interference elimination due to higher transmission power, and is used for piggybacking NOMA group users.
Fig. 13 is a diagram of a remote broadcast user terminal according to an embodiment of the present invention. As shown in fig. 12, the remote broadcast user terminal 230 may include a remote broadcast signal receiving module 231 and a remote broadcast noise removing module 232, wherein:
the remote broadcast signal receiving module is used for receiving remote broadcast user group receiving signals, wherein the remote broadcast user group receiving signals comprise remote broadcast signals and near unicast signals;
in an embodiment of the present invention, a receiving model of a remote broadcast ue can be obtained through a large-scale antenna system transmission channel model calculation according to the embodiment of fig. 6, which is specifically shown in formula (2).
Y2＝M2J2P2·B+M2J2P2·S2(2)
A far-zone broadcast noise removing module for removing the near-zone unicast signal M2J2P2·S2As noise removal.
Based on the remote broadcast user terminal of the above embodiment of the present invention, the NOMA user signal can be treated as noise during receiving, and the receiving process is not modified. The broadcast user in the remote area in the above embodiment of the present invention is favorable for serial interference cancellation due to higher transmission power, and is used for piggybacking NOMA group users.
According to another aspect of the present invention, there is provided a remote area unicast user terminal 240, wherein said remote area unicast user terminal 240 is configured to receive remote area unicast user group reception signals, wherein said remote area unicast user group reception signals comprise remote area unicast signals.
In an embodiment of the present invention, a receiving model of a remote area unicast user terminal can be obtained through a large-scale antenna system transmission channel model calculation in the embodiment of fig. 6, which is specifically shown in formula (3).
Yf＝MfJfPf·Sf(3)
In the above embodiments of the present invention, the coverage area of the base station is divided into two areas, a near area and a far area, the unicast users in the near area are divided into NOMA groups, and the unicast users in the far area use a normal MU-MIMO precoding technique. The broadcast group in the near area uses the normal broadcast precoding technology, and the broadcast user in the far area is favorable for eliminating serial interference due to higher transmission power and is used for bearing NOMA group users. The above embodiment of the present invention superimposes NOMA user signals on the broadcast group user group and transmits them together, and reduces interference to the broadcast user through power control. For the superimposed broadcast users, the above embodiment of the present invention treats the NOMA user signal as noise during reception, and the reception flow is not modified. For NOMA users, the above embodiments of the present invention utilize successive interference cancellation and precoding techniques to cancel the effects of broadcast groups and interference within NOMA users.
Through the above processing of the above embodiment of the invention, the number of connectable users of the MassiveMIMO system can be greatly expanded. Therefore, the embodiment of the invention greatly increases the flexibility of the system, improves the utilization rate of the channel, improves the throughput of the system and increases the number of service users.
Fig. 14 is a diagram illustrating a large-scale antenna transmission method according to a first embodiment of the present invention. Preferably, this embodiment can be performed by the large-scale antenna system of the present invention. As shown in fig. 14, the method may include:
step 1, the base station 100 divides users in the coverage area of the base station 100 into a near area broadcast user group, a far area broadcast user group, a near area unicast user group and a far area unicast user group.
In one embodiment of the invention, the near-zone unicast user group is a non-orthogonal multiple access user group.
Step 2, the base station 100 superimposes the near area unicast user group signal on the broadcast user group signal, wherein the broadcast user group signal comprises a near area broadcast user group signal and a far area broadcast user group signal.
And step 3, the base station 100 sends a sending signal to a corresponding user terminal, wherein the sending signal comprises a unicast user group signal and a broadcast user group signal.
In one embodiment of the present invention, step 3 may comprise:
in step 31, the base station 100 uses the user precoding matrix to precode the transmission signal.
In one embodiment of the present invention, step 31 may comprise:
step 311, the base station 100 adds a first transmission vector and a second transmission vector to form a transmission signal vector, where the first transmission vector is a vector formed by near zone broadcast group information, far zone broadcast group information, and far zone unicast group information, and the second transmission vector is a vector formed by first near zone unicast group information, second near zone unicast group information, and a zero matrix.
In an embodiment of the present invention, a vector formed by the first near area unicast group information and the second near area unicast group information is obtained by processing an original near area unicast signal by using a specific matrix, where the specific matrix is a generalized inverse matrix of a vector formed by the first precoding matrix and the second precoding matrix, the first precoding matrix is a product of a near area unicast user group matrix, the first null space matrix and a near area broadcast precoding matrix, and the second precoding matrix is a product of a near area unicast user group matrix, the second null space matrix and a far area broadcast precoding matrix.
In step 312, the base station 100 determines a user precoding matrix according to the user channel vector, the null space vector and the original precoding matrix.
In an embodiment of the present invention, the user channel vector is a column vector composed of a near-zone broadcast user group matrix, a far-zone unicast user group matrix, and a near-zone unicast user group matrix.
In an embodiment of the present invention, the null space vector is a row vector formed by a first null space matrix, a second null space matrix and a third null space matrix, wherein the first null space matrix is a null space matrix of a far-zone broadcast user group matrix and a far-zone unicast user group matrix, the second null space matrix is a null space matrix of a near-zone broadcast user group matrix and a far-zone unicast user group matrix, and the third null space matrix is a null space matrix of a near-zone broadcast user group matrix, a far-zone broadcast user group matrix and a far-zone unicast user group matrix.
In one embodiment of the present invention, the original precoding matrix is a block diagonal matrix, wherein the near-zone broadcast precoding matrix, the far-zone broadcast precoding matrix and the far-zone unicast precoding matrix are respectively located at diagonal positions of the block diagonal matrix.
Step 313, the base station 100 precodes the transmission signal vector according to the user precoding matrix.
In step 32, the base station 100 modulates the precoded transmission signal into a radio frequency signal.
In step 33, the base station 100 sends the modulated rf signal out from the corresponding port.
Fig. 15 is a diagram illustrating a large-scale antenna transmission method according to a second embodiment of the present invention. Preferably, this embodiment can be performed by the large-scale antenna system of the present invention. After step 3 of the embodiment of fig. 14, the method of the embodiment of fig. 15 may further include:
step 4, the near area unicast user terminal 210 receives a near area unicast user group receiving signal, wherein the near area unicast user group receiving signal comprises broadcast group information and a near area unicast signal, and the near area unicast signal comprises an orthogonal unit matrix and an original near area unicast signal.
Step 5, the near-area unicast user terminal 210 employs successive interference cancellation to cancel the broadcast group information.
Step 6, the near area broadcast user terminal 220 receives a near area broadcast user group receiving signal, wherein the near area broadcast user group receiving signal comprises a near area broadcast signal and a near area unicast signal.
And 7, the near area broadcast unicast user terminal removes the near area unicast signal as noise.
Step 8, the far-zone broadcast user terminal 230 receives a far-zone broadcast user group receiving signal, wherein the far-zone broadcast user group receiving signal comprises a far-zone broadcast signal and a near-zone unicast signal.
And 9, removing the near area unicast signal as noise by the far area broadcast unicast user terminal.
Step 10, the remote unicast user terminal 240 receives a remote unicast user group reception signal, where the remote unicast user group reception signal includes a remote unicast signal.
Based on the large-scale antenna transmission method provided by the above embodiment of the present invention, the coverage area of the base station is divided into two areas, a near area and a far area, the unicast users in the near area are divided into NOMA groups, and the unicast users in the far area use a normal MU-MIMO precoding technology. The broadcast group in the near area uses the normal broadcast precoding technology, and the broadcast user in the far area is favorable for eliminating serial interference due to higher transmission power and is used for bearing NOMA group users. The above embodiment of the present invention superimposes NOMA user signals on the broadcast group user group and transmits them together, and reduces interference to the broadcast user through power control. For the superimposed broadcast users, the above embodiment of the present invention treats the NOMA user signal as noise during reception, and the reception flow is not modified. For NOMA users, the above embodiments of the present invention utilize successive interference cancellation and precoding techniques to cancel the effects of broadcast groups and interference within NOMA users.
Through the above processing of the above embodiment of the invention, the number of connectable users of the MassiveMIMO system can be greatly expanded. Therefore, the embodiment of the invention greatly increases the flexibility of the system, improves the utilization rate of the channel, improves the throughput of the system and increases the number of service users.
The embodiment of the invention does not limit the implementation mode of precoding, has great flexibility, and has good compatibility with the existing MIMO precoding algorithm.
The functional blocks of the baseband processing unit 110, the serial interference cancellation module 212, the near-zone broadcast noise removal module 222, and the far-zone broadcast noise removal module 232 described above may be implemented as a general purpose processor, a Programmable Logic Controller (PLC), a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any suitable combination thereof for performing the functions described herein.
Thus far, the present invention has been described in detail. Some details well known in the art have not been described in order to avoid obscuring the concepts of the present invention. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims (19)

1. A method for large-scale antenna transmission, comprising:
the base station divides users in a coverage area of the base station into a near area broadcast user group, a far area broadcast user group, a near area unicast user group and a far area unicast user group;
the base station superposes the near area unicast user group signal to the broadcast user group signal, wherein the broadcast user group signal comprises a near area broadcast user group signal and a far area broadcast user group signal;
the base station sends a sending signal to a corresponding user terminal, wherein the sending signal comprises a far-zone unicast user group signal, a near-zone broadcast user group signal superposed with a near-zone unicast user group signal and a far-zone broadcast user group signal superposed with a near-zone unicast user group signal, the far-zone unicast user group signal is sent to the far-zone unicast user terminal, the near-zone broadcast user group signal superposed with a near-zone unicast user group signal is sent to the near-zone unicast user terminal and the near-zone broadcast user terminal, and the far-zone broadcast user group signal superposed with a near-zone unicast user group signal is sent to the near-zone unicast user terminal and the far-zone broadcast user terminal.
2. The method of claim 1, wherein the base station transmitting the transmission signal to the corresponding user terminal comprises:
the base station carries out precoding on the sending signals by adopting a user precoding matrix;
the base station modulates the pre-coded transmission signal into a radio frequency signal;
and the base station sends the modulated radio frequency signal out from the corresponding port.
3. The method of claim 2, wherein the base station precoding the transmission signal with the user precoding matrix comprises:
the base station adds a first transmission vector and a second transmission vector to form a transmission signal vector, wherein the first transmission vector is formed by near area broadcast group information, far area broadcast group information and far area unicast group information, and the second transmission vector is formed by first near area unicast group information, second near area unicast group information and a zero matrix;
the base station determines a user precoding matrix according to the user channel vector, the zero space vector and the original precoding matrix;
and the base station carries out precoding on the transmitted signal vector according to the user precoding matrix.
4. The method of claim 3,
the user channel vector is a column vector consisting of a near area broadcast user group matrix, a far area unicast user group matrix and a near area unicast user group matrix;
and/or the presence of a gas in the gas,
the null space vector is a row vector formed by a first null space matrix, a second null space matrix and a third null space matrix, wherein the first null space matrix is a null space matrix of a far-zone broadcast user group matrix and a far-zone unicast user group matrix, the second null space matrix is a null space matrix of a near-zone broadcast user group matrix and a far-zone unicast user group matrix, and the third null space matrix is a null space matrix of a near-zone broadcast user group matrix, a far-zone broadcast user group matrix and a near-zone unicast user group matrix;
and/or the presence of a gas in the gas,
the original precoding matrix is a block diagonal matrix, wherein a near area broadcast precoding matrix, a far area broadcast precoding matrix and a far area unicast precoding matrix are respectively positioned at diagonal positions of the block diagonal matrix;
and/or the presence of a gas in the gas,
the vector formed by the first near area unicast group information and the second near area unicast group information is obtained by processing an original near area unicast signal by adopting a specific matrix, wherein the specific matrix is a generalized inverse matrix of the vector formed by the first precoding matrix and the second precoding matrix, the first precoding matrix is a product of a near area unicast user group matrix, a first null space matrix and a near area broadcast precoding matrix, and the second precoding matrix is a product of a near area unicast user group matrix, a second null space matrix and a far area broadcast precoding matrix.
5. The method according to any one of claims 1 to 4,
and the near area unicast user group is a non-orthogonal multiple access user group.
6. The method of claim 4, further comprising:
a near area unicast user terminal receives a near area broadcast user group signal superposed with a near area unicast user group signal and a far area broadcast user group signal superposed with a near area unicast user group signal, wherein the near area unicast user group signal is obtained by precoding an original near area unicast signal by adopting an orthogonal unit array;
the near area unicast user terminal adopts serial interference elimination to eliminate the near area broadcast user group signal in the near area broadcast user group signal superimposed with the near area unicast user group signal and the far area broadcast user group signal in the far area broadcast user group signal superimposed with the near area unicast user group signal.
7. The method of claim 4, further comprising:
a near-zone broadcast user terminal receives a near-zone broadcast user group signal superposed with a near-zone unicast user group signal;
and the near area broadcast user terminal removes the near area unicast user group signal in the near area broadcast user group signal superimposed with the near area unicast user group signal as noise.
8. The method of claim 4, further comprising:
a far-zone broadcast user terminal receives a far-zone broadcast user group signal superposed with a near-zone unicast user group signal;
and the far-zone broadcast user terminal removes the near-zone unicast user group signal in the far-zone broadcast user group signal superposed with the near-zone unicast user group signal as noise.
9. The method of claim 4, further comprising:
and the remote area unicast user terminal receives the remote area unicast user group signal.
10. A base station, comprising:
the base band processing unit is used for dividing users in a coverage area of the base station into a near area broadcast user group, a far area broadcast user group, a near area unicast user group and a far area unicast user group; and superimposing the near area unicast user group signal to the broadcast user group signal, wherein the broadcast user group signal comprises a near area broadcast user group signal and a far area broadcast user group signal;
the large-scale antenna array is used for sending a sending signal to a corresponding user terminal, wherein the sending signal comprises a far-zone unicast user group signal, a near-zone broadcast user group signal superposed with the near-zone unicast user group signal and a far-zone broadcast user group signal superposed with the near-zone unicast user group signal, the far-zone unicast user group signal is sent to the far-zone unicast user terminal, the near-zone broadcast user group signal superposed with the near-zone unicast user group signal is sent to the near-zone unicast user terminal and the near-zone broadcast user terminal, and the far-zone broadcast user group signal superposed with the near-zone unicast user group signal is sent to the near-zone unicast user terminal and the far-zone broadcast user terminal.
11. The base station of claim 10, further comprising a radio frequency unit, wherein:
the baseband processing unit is also used for precoding the sending signals by adopting a user precoding matrix;
a radio frequency unit, configured to modulate the precoded transmission signal into a radio frequency signal;
and the large-scale antenna array is used for sending the modulated radio-frequency signals out from the corresponding ports.
12. The base station of claim 11, wherein the baseband processing unit comprises:
a transmission vector determining module, configured to add a first transmission vector and a second transmission vector to form a transmission signal vector, where the first transmission vector is a vector formed by near-area broadcast group information, far-area broadcast group information, and far-area unicast group information, and the second transmission vector is a vector formed by first near-area unicast group information, second near-area unicast group information, and a zero matrix;
the pre-coding matrix determining module is used for determining a user pre-coding matrix according to the user channel vector, the zero space vector and the original pre-coding matrix;
and the precoding module is used for precoding the transmitted signal vector according to the user precoding matrix.
13. The base station of claim 12,
the user channel vector is a column vector consisting of a near area broadcast user group matrix, a far area unicast user group matrix and a near area unicast user group matrix;
and/or the presence of a gas in the gas,
the null space vector is a row vector formed by a first null space matrix, a second null space matrix and a third null space matrix, wherein the first null space matrix is a null space matrix of a far-zone broadcast user group matrix and a far-zone unicast user group matrix, the second null space matrix is a null space matrix of a near-zone broadcast user group matrix and a far-zone unicast user group matrix, and the third null space matrix is a null space matrix of a near-zone broadcast user group matrix, a far-zone broadcast user group matrix and a near-zone unicast user group matrix;
and/or the presence of a gas in the gas,
the original precoding matrix is a block diagonal matrix, wherein a near area broadcast precoding matrix, a far area broadcast precoding matrix and a far area unicast precoding matrix are respectively positioned at diagonal positions of the block diagonal matrix;
and/or the presence of a gas in the gas,
the vector formed by the first near area unicast group information and the second near area unicast group information is obtained by processing an original near area unicast signal by adopting a specific matrix, wherein the specific matrix is a generalized inverse matrix of the vector formed by the first precoding matrix and the second precoding matrix, the first precoding matrix is a product of a near area unicast user group matrix, a first null space matrix and a near area broadcast precoding matrix, and the second precoding matrix is a product of a near area unicast user group matrix, a second null space matrix and a far area broadcast precoding matrix.
14. Base station according to any of claims 10-11,
and the near area unicast user group is a non-orthogonal multiple access user group.
15. A near zone unicast user terminal, comprising:
a near area unicast signal receiving module for receiving near area broadcast user group signal superimposed with near area unicast user group signal and far area broadcast user group signal superimposed with near area unicast user group signal, wherein the near area unicast user group signal is obtained by pre-coding original near area unicast signal by using orthogonal unit array, the base station divides users in the coverage area of the base station into near area broadcast user group, far area broadcast user group, near area unicast user group and far area unicast users, the base station superimposes near area unicast user group signal on the broadcast user group signal, wherein the broadcast user group signal comprises near area broadcast user group signal and far area broadcast user group signal, the base station sends the near area broadcast user group signal superimposed with near area unicast user group signal to near area unicast user terminal and near area broadcast user terminal, and sends the far area broadcast user group signal superimposed with near area unicast user group signal to near area unicast user terminal and far area broadcast user terminal (ii) a
And the serial interference elimination module is used for eliminating the near area broadcast user group signal in the near area broadcast user group signal superposed with the near area unicast user group signal and the far area broadcast user group signal in the far area broadcast user group signal superposed with the near area unicast user group signal by adopting serial interference elimination.
16. A near zone broadcast user terminal, comprising:
a near area broadcast signal receiving module, configured to receive a near area broadcast user group signal superimposed with a near area unicast user group signal, where a base station divides users in a coverage area of the base station into a near area broadcast user group, a far area broadcast user group, a near area unicast user group, and a far area unicast user, the base station superimposes the near area unicast user group signal onto the broadcast user group signal, where the broadcast user group signal includes the near area broadcast user group signal and the far area broadcast user group signal, and the base station sends the near area broadcast user group signal superimposed with the near area unicast user group signal to a near area unicast user terminal and a near area broadcast user terminal;
and the near area broadcast noise removing module is used for removing the near area unicast user group signal in the near area broadcast user group signal superimposed with the near area unicast user group signal as noise.
17. A remote broadcast user terminal, comprising:
a far-zone broadcast signal receiving module for receiving far-zone broadcast user group signals superposed with near-zone unicast user group signals, wherein the base station divides users in a base station coverage area into a near-zone broadcast user group, a far-zone broadcast user group, a near-zone unicast user group and a far-zone unicast user, the base station superposes the near-zone unicast user group signals on the broadcast user group signals, the broadcast user group signals comprise near-zone broadcast user group signals and far-zone broadcast user group signals, and the base station sends the far-zone broadcast user group signals superposed with the near-zone unicast user group signals to a near-zone unicast user terminal and a far-zone broadcast user terminal;
and the far-zone broadcast noise removing module is used for removing the near-zone unicast user group signals in the far-zone broadcast user group signals superposed with the near-zone unicast user group signals as noise.
18. A remote unicast user terminal is characterized in that the remote unicast user terminal is used for receiving remote unicast user group signals, wherein a base station divides users in a coverage area of the base station into a near broadcast user group, a remote broadcast user group, a near unicast user group and a remote unicast user, the base station superposes the near unicast user group signals on the broadcast user group signals, the broadcast user group signals comprise near broadcast user group signals and remote broadcast user group signals, and the base station sends the remote unicast user group signals to the remote unicast user terminal.
19. A massive antenna system, comprising user terminals and a base station according to any of claims 10-14, wherein the user terminals comprise at least one of a near area unicast user terminal according to claim 15, a near area broadcast user terminal according to claim 16, a far area broadcast user terminal according to claim 17, and a far area unicast user terminal according to claim 18.
CN201710694152.XA 2017-08-15 2017-08-15 Large-scale antenna transmission method, base station, user terminal and large-scale antenna system Active CN109412660B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710694152.XA CN109412660B (en) 2017-08-15 2017-08-15 Large-scale antenna transmission method, base station, user terminal and large-scale antenna system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710694152.XA CN109412660B (en) 2017-08-15 2017-08-15 Large-scale antenna transmission method, base station, user terminal and large-scale antenna system

Publications (2)

Publication Number Publication Date
CN109412660A CN109412660A (en) 2019-03-01
CN109412660B true CN109412660B (en) 2020-09-22

Family

ID=65453996

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710694152.XA Active CN109412660B (en) 2017-08-15 2017-08-15 Large-scale antenna transmission method, base station, user terminal and large-scale antenna system

Country Status (1)

Country Link
CN (1) CN109412660B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111246578B (en) * 2020-01-09 2023-06-09 北京航空航天大学杭州创新研究院 NOMA downlink communication method under directional antenna scene

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101291451A (en) * 2007-04-18 2008-10-22 华为技术有限公司 Downlink data transmission method and apparatus for multicast and broadcast service
CN106027128A (en) * 2016-04-27 2016-10-12 清华大学 Uplink multiuser interference suppression method based on non-orthogonal multiple access
CN106788651A (en) * 2017-01-22 2017-05-31 西安交通大学 The information transferring method of many geographic area broadcast systems accessed based on non-orthogonal multiple
CN106937256A (en) * 2017-01-12 2017-07-07 西安电子科技大学 A kind of cooperation multicast transmission method based on non-orthogonal multiple access technology

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10181934B2 (en) * 2015-05-26 2019-01-15 Qualcomm Incorporated Non-orthogonal multiple access between a unicast signal and a single-cell point-to-multipoint signal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101291451A (en) * 2007-04-18 2008-10-22 华为技术有限公司 Downlink data transmission method and apparatus for multicast and broadcast service
CN106027128A (en) * 2016-04-27 2016-10-12 清华大学 Uplink multiuser interference suppression method based on non-orthogonal multiple access
CN106937256A (en) * 2017-01-12 2017-07-07 西安电子科技大学 A kind of cooperation multicast transmission method based on non-orthogonal multiple access technology
CN106788651A (en) * 2017-01-22 2017-05-31 西安交通大学 The information transferring method of many geographic area broadcast systems accessed based on non-orthogonal multiple

Also Published As

Publication number Publication date
CN109412660A (en) 2019-03-01

Similar Documents

Publication Publication Date Title
CN108650001B (en) A kind of signal scrambling, de-scrambling method and device
TWI630812B (en) Data transmission method for performing a full-duplex communication and base station using the same
EP2608434A1 (en) Communications terminal, method and apparatus for interference cancellation, and method of demodulation
US20170264464A1 (en) Method for Processing Data, Network Node, and Terminal
CN107623565A (en) Method and apparatus based on multi-channel transmission signal
CN104754537B (en) Method and device for sending and receiving network auxiliary signaling
EP4118798A1 (en) Radio receiver
CN109412660B (en) Large-scale antenna transmission method, base station, user terminal and large-scale antenna system
WO2010049993A1 (en) Multi-user mimo wireless communication method and multi-user mimo wireless communication device
Jeong et al. Cooperative jammer design in cellular network with internal eavesdroppers
RU2589314C1 (en) Method, system and device for signal transmission
EP3280046B1 (en) Electronic device in wireless communications system, wireless communications system, and method
Menon et al. A novel tri-staged RIA scheme for cooperative cell edge users in a multi-cellular MIMO IMAC
CN102474381B (en) Radio communication system, radio communication device, and radio communication method
CN106685569B (en) A kind of interference alignment schemes decomposed based on joint QR
Antonio-Rodríguez et al. Subspace-constrained SINR optimization in MIMO full-duplex relays under limited dynamic range
CN106160802A (en) Wireless Telecom Equipment and wireless communications method
Lee Interference-free OFDM: rethinking OFDM for interference networks with inter-symbol interference
Abdou et al. Overlay cognitive radio based on UFMC system
CN106559810B (en) Signal processing method and system for heterogeneous network multi-cell system
CN110049542A (en) The data transmission method and system of uplink based on mimo system
Jeon et al. On the degrees of freedom of wide-band multi-cell multiple access channels with no CSIT
Chan et al. Reverse signal-aligned network coding in interference channels with limited transmitter cooperation
US11533200B2 (en) Wireless communication device and channel estimation method thereof
CN106256092B (en) Method, station and access station for transmitting pilot frequency

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant