CN109802712B - User equipment, access equipment and precoding method - Google Patents

User equipment, access equipment and precoding method Download PDF

Info

Publication number
CN109802712B
CN109802712B CN201711148851.0A CN201711148851A CN109802712B CN 109802712 B CN109802712 B CN 109802712B CN 201711148851 A CN201711148851 A CN 201711148851A CN 109802712 B CN109802712 B CN 109802712B
Authority
CN
China
Prior art keywords
vector
precoding
precoding vectors
vectors
class
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
CN201711148851.0A
Other languages
Chinese (zh)
Other versions
CN109802712A (en
Inventor
王潇涵
金黄平
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.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co 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 Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CN201711148851.0A priority Critical patent/CN109802712B/en
Priority to PCT/CN2018/112259 priority patent/WO2019095970A1/en
Publication of CN109802712A publication Critical patent/CN109802712A/en
Application granted granted Critical
Publication of CN109802712B publication Critical patent/CN109802712B/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
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path

Abstract

The embodiment of the invention provides user equipment which comprises a processing module and a pre-coding module, wherein the processing module is used for generating indication information for indicating a plurality of pre-coding vectors, the plurality of pre-coding vectors comprise j first pre-coding vectors and k second pre-coding vectors, and each first pre-coding vector comprises
Figure DDA0001473056020000015
Expressed as:
Figure DDA0001473056020000011
wherein
Figure DDA0001473056020000012
Figure DDA0001473056020000016
Is a component vector, and
Figure DDA0001473056020000017
any two component vectors in are orthogonal to each other, αm,i,rIs a sub-vector xm,rVector of medium component
Figure DDA0001473056020000018
M is more than or equal to 1 and less than or equal to j, L>1, r ═ 1 or 2; each second-class precoding vector
Figure DDA0001473056020000019
Expressed as:
Figure DDA0001473056020000013
wherein, in the step (A),
Figure DDA00014730560200000110
for constructing precoding vectors of the second kind
Figure DDA00014730560200000111
The vector of the components of (a) is,
Figure DDA0001473056020000014
precoding vectors for the second class
Figure DDA00014730560200000112
N is more than or equal to 1 and less than or equal to k; and the transceiver module is used for transmitting the indication information. The embodiment of the invention also provides access equipment and a precoding method. The technical scheme provided by the embodiment of the invention is beneficial to effectively limiting the overhead brought by the indication of the precoding vector while improving the precision of the precoding vector.

Description

User equipment, access equipment and precoding method
Technical Field
The embodiment of the invention relates to a precoding technology, in particular to user equipment, access equipment and a precoding method.
Background
The advent of Multiple Input Multiple Output (MIMO) technology has revolutionized wireless communications. By deploying multiple antennas on the transmitting end device and the receiving end device, the MIMO technology can significantly improve the performance of the wireless communication system. For example, in a diversity scenario, the MIMO technique can effectively improve transmission reliability; under a multiplexing scene, the MIMO technology can improve the transmission throughput by times.
An important branch of MIMO technology is precoding, which processes a signal to be transmitted by means of a precoding matrix matched to the channel properties, so that the precoded signal to be transmitted is adapted to the channel, and thus the transmission process is optimized and the received signal quality (e.g., SINR) is improved. Currently, precoding techniques have been adopted by various wireless communication standards, such as, but not limited to, LTE.
Early precoding techniques determined a precoding matrix based on a beam selection (beam selection) approach that selects a suitable matrix in a codebook as the precoding matrix. The precoding matrix usually comprises at least one column vector, which may be referred to as precoding vectors, each column vector being used for precoding a Layer (Layer), which may also be referred to as data Layer or spatial stream, etc. The codebook is typically a collection of candidate matrices, where the candidate matrix that best matches the channel may be selected as the precoding matrix. In a specific implementation process, a candidate matrix that is most matched to a channel may be determined based on various principles, such as, but not limited to, maximization of channel capacity, maximization of channel throughput, or closest to an ideal precoding matrix, where the ideal precoding matrix may be a conjugate transpose matrix of a right unitary matrix obtained by Singular Value Decomposition (SVD) of a channel matrix, and a column vector of the conjugate transpose matrix may be referred to as an ideal precoding vector.
The actual effect of performing precoding generally depends on how well the precoding matrix matches the channel, the better the actual effect of performing precoding. As described above, the beam selection method selects candidate matrices in the codebook as precoding matrices, and thus, the more candidate matrices in the codebook, the more channels can be matched. However, the capacity of the existing codebook is usually very limited, and the purpose is to reduce the complexity of the implementation process, such as, but not limited to, the computational complexity in determining the precoding matrix. However, it is understood that the limitation on codebook capacity inevitably affects the matching degree of the precoding matrix and the channel, the limited codebook is not enough to match various channels, and the practical effect of precoding is very limited.
To overcome the above problems, the prior art introduces a beam combining (beam combining) technique to determine the precoding matrix. The beam combination technology selects a plurality of candidate vectors as component vectors in a codebook for weighted combination, so as to construct precoding vectors. In the beam combining technique, the codebook is usually a set of candidate vectors, wherein a plurality of candidate vectors that most closely match the channel may be selected as component vectors. For example, the candidate vector in the codebook that is closest to the ideal precoding vector may be selected as the component vector. By selecting proper candidate vectors as component vectors to carry out weighted combination, the matching degree of the precoding vectors and the channel can be improved, and the execution effect of precoding is further improved.
Although the beam combining technique can improve the accuracy of the precoding vector, it also increases the overhead of indicating the precoding vector. For example, according to the beam combining technique, when a precoding vector is indicated, not only a plurality of component vectors for constructing the precoding vector but also weighting coefficients of the component vectors need to be indicated. When the precoding matrix contains a plurality of precoding vectors, or a plurality of narrowband precoding vectors need to be fed back, the overhead generated becomes larger.
Therefore, a technical solution is needed to effectively limit the overhead caused by indicating the precoding vector while improving the accuracy of the precoding vector.
Disclosure of Invention
In view of the foregoing, it is actually necessary to provide a user equipment, which is helpful to effectively limit the overhead caused by indicating a precoding vector while improving the accuracy of the precoding vector.
Meanwhile, the access equipment is provided, which is beneficial to effectively limiting the overhead brought by the indication of the precoding vector while improving the precision of the precoding vector.
Meanwhile, a precoding method is provided, which is beneficial to effectively limiting the overhead brought by the indication of the precoding vector while improving the precision of the precoding vector.
According to a first aspect of embodiments of the present invention, there is provided a user equipment, including:
a processing module for generating indication information, wherein,
the indication information is used for indicating a plurality of precoding vectors, the plurality of precoding vectors comprise j first-class precoding vectors and k second-class precoding vectors, j is not less than 1, k is not less than 1, and each first-class precoding vector
Figure BDA0001473056000000021
Expressed as:
Figure BDA0001473056000000022
wherein x ism,rPrecoding vectors for the first class
Figure BDA0001473056000000023
Is a sub-vector of
Figure BDA0001473056000000024
Wherein the content of the first and second substances,
Figure BDA0001473056000000025
is a component vector used for constructing any sub-vector in any first-class precoding vector in the j first-class precoding vectors, and
Figure BDA0001473056000000026
any two component vectors in are orthogonal to each other, αm,i,rIs a sub-vector xm,rVector of medium component
Figure BDA0001473056000000027
M is more than or equal to 1 and less than or equal to j, L>1, r ═ 1 or 2; each second-class precoding vector
Figure BDA0001473056000000028
Expressed as:
Figure BDA0001473056000000029
wherein the content of the first and second substances,
Figure BDA00014730560000000210
for constructing precoding vectors of the second kind
Figure BDA00014730560000000211
The vector of the components of (a) is,
Figure BDA00014730560000000212
precoding vectors for the second class
Figure BDA00014730560000000213
N is more than or equal to 1 and less than or equal to k; alternatively, the first and second electrodes may be,
the indication information is used for indicating a plurality of precoding vectors, the plurality of precoding vectors comprise j first type precoding vectors and k groups of second type precoding vectors, and the precoding vectors compriseJ is more than or equal to 1, k is more than or equal to 1, and each first-class precoding vector
Figure BDA00014730560000000214
Expressed as:
Figure BDA00014730560000000215
wherein x ism,rPrecoding vectors for the first class
Figure BDA00014730560000000216
Is a sub-vector of
Figure BDA00014730560000000217
Wherein the content of the first and second substances,
Figure BDA00014730560000000218
is a component vector used for constructing any sub-vector in any first-class precoding vector in the j first-class precoding vectors, and
Figure BDA00014730560000000219
any two component vectors in are orthogonal to each other, αm,i,rIs a sub-vector xm,rVector of medium component
Figure BDA00014730560000000220
M is more than or equal to 1 and less than or equal to j, L>1, r ═ 1 or 2; each group of second-type precoding vectors contains v second-type precoding vectors, each second-type precoding vector in the group of second-type precoding vectors
Figure BDA0001473056000000031
Expressed as:
Figure BDA0001473056000000032
wherein the content of the first and second substances,
Figure BDA0001473056000000033
for constructing precoding vectors of the second kind
Figure BDA0001473056000000034
The vector of the components of (a) is,
Figure BDA0001473056000000035
precoding vectors for the second class
Figure BDA00014730560000000332
N is more than or equal to 1 and less than or equal to v, and v is more than or equal to 1; and the transceiver module is used for transmitting the indication information.
According to a second aspect of the embodiments of the present invention, there is provided an access device, including:
a transceiver module for receiving the indication information, wherein,
the indication information is used for indicating a plurality of precoding vectors, the plurality of precoding vectors comprise j first-class precoding vectors and k second-class precoding vectors, j is not less than 1, k is not less than 1, and each first-class precoding vector
Figure BDA0001473056000000036
Expressed as:
Figure BDA0001473056000000037
wherein x ismrPrecoding vectors for the first class
Figure BDA0001473056000000038
Is a sub-vector of
Figure BDA0001473056000000039
Wherein the content of the first and second substances,
Figure BDA00014730560000000310
to be used for constructingBuilding a component vector of any sub-vector in any first-type precoding vector in the j first-type precoding vectors, and
Figure BDA00014730560000000311
any two component vectors in are orthogonal to each other, αm,i,rIs a sub-vector xm,rVector of medium component
Figure BDA00014730560000000312
M is more than or equal to 1 and less than or equal to j, L>1, r ═ 1 or 2; each second-class precoding vector
Figure BDA00014730560000000313
Expressed as:
Figure BDA00014730560000000314
wherein the content of the first and second substances,
Figure BDA00014730560000000315
for constructing precoding vectors of the second kind
Figure BDA00014730560000000316
The vector of the components of (a) is,
Figure BDA00014730560000000317
precoding vectors for the second class
Figure BDA00014730560000000318
N is more than or equal to 1 and less than or equal to k; alternatively, the first and second electrodes may be,
the indication information is used for indicating a plurality of precoding vectors, the plurality of precoding vectors comprise j first-class precoding vectors and k groups of second-class precoding vectors, j is not less than 1, k is not less than 1, and each first-class precoding vector
Figure BDA00014730560000000319
Expressed as:
Figure BDA00014730560000000320
wherein x ism,rPrecoding vectors for the first class
Figure BDA00014730560000000331
Is a sub-vector of
Figure BDA00014730560000000321
Wherein the content of the first and second substances,
Figure BDA00014730560000000322
is a component vector used for constructing any sub-vector in any first-class precoding vector in the j first-class precoding vectors, and
Figure BDA00014730560000000323
any two component vectors in are orthogonal to each other, αm,i,rIs a sub-vector xm,rVector of medium component
Figure BDA00014730560000000324
M is more than or equal to 1 and less than or equal to j, L>1, r ═ 1 or 2; each group of second-type precoding vectors contains v second-type precoding vectors, each second-type precoding vector in the group of second-type precoding vectors
Figure BDA00014730560000000325
Expressed as:
Figure BDA00014730560000000326
wherein the content of the first and second substances,
Figure BDA00014730560000000327
for constructing precoding vectors of the second kind
Figure BDA00014730560000000328
The vector of the components of (a) is,
Figure BDA00014730560000000329
precoding vectors for the second class
Figure BDA00014730560000000330
N is more than or equal to 1 and less than or equal to v, and v is more than or equal to 1;
and the processing module is used for determining the plurality of precoding vectors according to the indication information.
According to a third aspect of the embodiments of the present invention, there is provided a precoding method, including:
generating indication information, wherein,
the indication information is used for indicating a plurality of precoding vectors, the plurality of precoding vectors comprise j first-class precoding vectors and k second-class precoding vectors, j is not less than 1, k is not less than 1, and each first-class precoding vector
Figure BDA0001473056000000041
Expressed as:
Figure BDA0001473056000000042
wherein x ism,rPrecoding vectors for the first class
Figure BDA0001473056000000043
Is a sub-vector of
Figure BDA0001473056000000044
Wherein the content of the first and second substances,
Figure BDA0001473056000000045
is a component vector used for constructing any sub-vector in any first-class precoding vector in the j first-class precoding vectors, and
Figure BDA0001473056000000046
any two component vectors in are orthogonal to each other, αm,i,rIs a sub-vector xm,rVector of medium component
Figure BDA0001473056000000047
M is more than or equal to 1 and less than or equal to j, L>1, r ═ 1 or 2; each second-class precoding vector
Figure BDA0001473056000000048
Expressed as:
Figure BDA0001473056000000049
wherein the content of the first and second substances,
Figure BDA00014730560000000410
for constructing precoding vectors of the second kind
Figure BDA00014730560000000411
The vector of the components of (a) is,
Figure BDA00014730560000000412
precoding vectors for the second class
Figure BDA00014730560000000413
N is more than or equal to 1 and less than or equal to k; alternatively, the first and second electrodes may be,
the indication information is used for indicating a plurality of precoding vectors, the plurality of precoding vectors comprise j first-class precoding vectors and k groups of second-class precoding vectors, j is not less than 1, k is not less than 1, and each first-class precoding vector
Figure BDA00014730560000000414
Expressed as:
Figure BDA00014730560000000415
wherein x ism,rAs a first kindEncoding vector
Figure BDA00014730560000000416
Is a sub-vector of
Figure BDA00014730560000000417
Wherein the content of the first and second substances,
Figure BDA00014730560000000418
is a component vector used for constructing any sub-vector in any first-class precoding vector in the j first-class precoding vectors, and
Figure BDA00014730560000000419
any two component vectors in are orthogonal to each other, αm,i,rIs a sub-vector xm,rVector of medium component
Figure BDA00014730560000000420
M is more than or equal to 1 and less than or equal to j, L>1, r ═ 1 or 2; each group of second-type precoding vectors contains v second-type precoding vectors, each second-type precoding vector in the group of second-type precoding vectors
Figure BDA00014730560000000421
Expressed as:
Figure BDA00014730560000000422
wherein the content of the first and second substances,
Figure BDA00014730560000000423
for constructing precoding vectors of the second kind
Figure BDA00014730560000000424
The vector of the components of (a) is,
Figure BDA00014730560000000425
as a second kind of preliminaryEncoding vector
Figure BDA00014730560000000426
N is more than or equal to 1 and less than or equal to v, and v is more than or equal to 1;
and sending the indication information.
According to a fourth aspect of the embodiments of the present invention, there is provided a precoding method, including:
receiving indication information, wherein,
the indication information is used for indicating a plurality of precoding vectors, the plurality of precoding vectors comprise j first-class precoding vectors and k second-class precoding vectors, j is not less than 1, k is not less than 1, and each first-class precoding vector
Figure BDA00014730560000000427
Expressed as:
Figure BDA00014730560000000428
wherein x ism,rPrecoding vectors for the first class
Figure BDA00014730560000000429
Is a sub-vector of
Figure BDA00014730560000000430
Wherein the content of the first and second substances,
Figure BDA00014730560000000431
is a component vector used for constructing any sub-vector in any first-class precoding vector in the j first-class precoding vectors, and
Figure BDA0001473056000000051
any two component vectors in are orthogonal to each other, αm,i,rIs a sub-vector xm,rVector of medium component
Figure BDA0001473056000000052
M is more than or equal to 1 and less than or equal to j, L>1, r ═ 1 or 2; each second-class precoding vector
Figure BDA0001473056000000053
Expressed as:
Figure BDA0001473056000000054
wherein the content of the first and second substances,
Figure BDA0001473056000000055
for constructing precoding vectors of the second kind
Figure BDA0001473056000000056
The vector of the components of (a) is,
Figure BDA0001473056000000057
precoding vectors for the second class
Figure BDA0001473056000000058
N is more than or equal to 1 and less than or equal to k; alternatively, the first and second electrodes may be,
the indication information is used for indicating a plurality of precoding vectors, the plurality of precoding vectors comprise j first-class precoding vectors and k groups of second-class precoding vectors, j is not less than 1, k is not less than 1, and each first-class precoding vector
Figure BDA0001473056000000059
Expressed as:
Figure BDA00014730560000000510
wherein x ism,rPrecoding vectors for the first class
Figure BDA00014730560000000511
Is a sub-vector of
Figure BDA00014730560000000512
Wherein the content of the first and second substances,
Figure BDA00014730560000000513
is a component vector used for constructing any sub-vector in any first-class precoding vector in the j first-class precoding vectors, and
Figure BDA00014730560000000514
any two component vectors in are orthogonal to each other, αm,i,rIs a sub-vector xm,rVector of medium component
Figure BDA00014730560000000515
M is more than or equal to 1 and less than or equal to j, L>1, r ═ 1 or 2; each group of second-type precoding vectors contains v second-type precoding vectors, each second-type precoding vector in the group of second-type precoding vectors
Figure BDA00014730560000000516
Expressed as:
Figure BDA00014730560000000517
wherein the content of the first and second substances,
Figure BDA00014730560000000518
for constructing precoding vectors of the second kind
Figure BDA00014730560000000519
The vector of the components of (a) is,
Figure BDA00014730560000000520
precoding vectors for the second class
Figure BDA00014730560000000521
N is more than or equal to 1 and less than or equal to v, and v is more than or equal to 1;
and determining the plurality of precoding vectors according to the indication information.
According to a fifth aspect of the embodiments of the present invention, there is provided a user equipment, including:
a processor for generating indication information, wherein,
the indication information is used for indicating a plurality of precoding vectors, the plurality of precoding vectors comprise j first-class precoding vectors and k second-class precoding vectors, j is not less than 1, k is not less than 1, and each first-class precoding vector
Figure BDA00014730560000000522
Expressed as:
Figure BDA00014730560000000523
wherein x ism,rPrecoding vectors for the first class
Figure BDA00014730560000000524
Is a sub-vector of
Figure BDA00014730560000000525
Wherein the content of the first and second substances,
Figure BDA00014730560000000526
is a component vector used for constructing any sub-vector in any first-class precoding vector in the j first-class precoding vectors, and
Figure BDA00014730560000000527
any two component vectors in are orthogonal to each other, αm,i,rIs a sub-vector xm,rVector of medium component
Figure BDA00014730560000000534
M is more than or equal to 1 and less than or equal to j, L>1, r ═ 1 or 2; each second-class precoding vector
Figure BDA00014730560000000528
Expressed as:
Figure BDA00014730560000000529
wherein the content of the first and second substances,
Figure BDA00014730560000000530
for constructing precoding vectors of the second kind
Figure BDA00014730560000000531
The vector of the components of (a) is,
Figure BDA00014730560000000532
precoding vectors for the second class
Figure BDA00014730560000000533
N is more than or equal to 1 and less than or equal to k; alternatively, the first and second electrodes may be,
the indication information is used for indicating a plurality of precoding vectors, the plurality of precoding vectors comprise j first-class precoding vectors and k groups of second-class precoding vectors, j is not less than 1, k is not less than 1, and each first-class precoding vector
Figure BDA0001473056000000061
Expressed as:
Figure BDA0001473056000000062
wherein x ism,rPrecoding vectors for the first class
Figure BDA0001473056000000063
Is a sub-vector of
Figure BDA0001473056000000064
Wherein the content of the first and second substances,
Figure BDA0001473056000000065
is a component vector used for constructing any sub-vector in any first-class precoding vector in the j first-class precoding vectors, and
Figure BDA0001473056000000066
any two component vectors in are orthogonal to each other, αm,i,rIs a sub-vector xm,rVector of medium component
Figure BDA0001473056000000067
M is more than or equal to 1 and less than or equal to j, L>1, r ═ 1 or 2; each group of second-type precoding vectors contains v second-type precoding vectors, each second-type precoding vector in the group of second-type precoding vectors
Figure BDA0001473056000000068
Expressed as:
Figure BDA0001473056000000069
wherein the content of the first and second substances,
Figure BDA00014730560000000610
for constructing precoding vectors of the second kind
Figure BDA00014730560000000611
The vector of the components of (a) is,
Figure BDA00014730560000000612
precoding vectors for the second class
Figure BDA00014730560000000613
N is more than or equal to 1 and less than or equal to v, and v is more than or equal to 1;
a transceiver for transmitting the indication information.
According to a sixth aspect of the embodiments of the present invention, there is provided an access device, including:
a transceiver for receiving the indication information, wherein,
the indication information is used for indicating a plurality of precoding vectors, the plurality of precoding vectors comprise j first-class precoding vectors and k second-class precoding vectors, j is not less than 1, k is not less than 1, and each first-class precoding vector
Figure BDA00014730560000000614
Expressed as:
Figure BDA00014730560000000615
wherein x ism,rPrecoding vectors for the first class
Figure BDA00014730560000000616
Is a sub-vector of
Figure BDA00014730560000000617
Wherein the content of the first and second substances,
Figure BDA00014730560000000618
is a component vector used for constructing any sub-vector in any first-class precoding vector in the j first-class precoding vectors, and
Figure BDA00014730560000000619
any two component vectors in are orthogonal to each other, αm，i，rIs a sub-vector xmrVector of medium component
Figure BDA00014730560000000620
M is more than or equal to 1 and less than or equal to j, L>1, r ═ 1 or 2; each second-class precoding vector
Figure BDA00014730560000000621
Expressed as:
Figure BDA00014730560000000622
wherein the content of the first and second substances,
Figure BDA00014730560000000623
for constructing precoding vectors of the second kind
Figure BDA00014730560000000624
The vector of the components of (a) is,
Figure BDA00014730560000000625
precoding vectors for the second class
Figure BDA00014730560000000626
N is more than or equal to 1 and less than or equal to k; alternatively, the first and second electrodes may be,
the indication information is used for indicating a plurality of precoding vectors, the plurality of precoding vectors comprise j first-class precoding vectors and k groups of second-class precoding vectors, j is not less than 1, k is not less than 1, and each first-class precoding vector
Figure BDA00014730560000000627
Expressed as:
Figure BDA00014730560000000628
wherein x ism,rPrecoding vectors for the first class
Figure BDA00014730560000000629
Is a sub-vector of
Figure BDA00014730560000000630
Wherein the content of the first and second substances,
Figure BDA00014730560000000631
is a component vector used for constructing any sub-vector in any first-class precoding vector in the j first-class precoding vectors, and
Figure BDA00014730560000000632
any two component vectors in are orthogonal to each other, αm,i,rIs a sub-vector xm,rVector of medium component
Figure BDA00014730560000000633
M is more than or equal to 1 and less than or equal to j, L>1, r ═ 1 or 2; each group of second-type precoding vectors contains v second-type precoding vectors, each second-type precoding vector in the group of second-type precoding vectors
Figure BDA0001473056000000071
Expressed as:
Figure BDA0001473056000000072
wherein the content of the first and second substances,
Figure BDA0001473056000000073
for constructing precoding vectors of the second kind
Figure BDA0001473056000000074
The vector of the components of (a) is,
Figure BDA0001473056000000075
precoding vectors for the second class
Figure BDA0001473056000000076
N is more than or equal to 1 and less than or equal to v, and v is more than or equal to 1;
a processor configured to determine the plurality of precoding vectors according to the indication information.
In particular implementations, the processor may be configured to perform, for example and without limitation, baseband related processing, and the transceiver may be configured to perform, for example and without limitation, radio frequency transceiving. The above devices may be respectively disposed on separate chips, or at least a part or all of the devices may be disposed on the same chip, for example, the transceiver may be disposed on the transceiver chip. For another example, the processor may be further divided into an analog baseband processor and a digital baseband processor, wherein the analog baseband processor may be integrated with the transceiver on the same chip, and the digital baseband processor may be disposed on a separate chip. With the development of integrated circuit technology, more and more devices can be integrated on the same chip, for example, a digital baseband processor can be integrated on the same chip with various application processors (such as, but not limited to, a graphics processor, a multimedia processor, etc.). Such a Chip may be referred to as a System on Chip. Whether each device is separately located on a different chip or integrated on one or more chips often depends on the specific needs of the product design. The embodiment of the present invention does not limit the specific implementation form of the above device.
According to a seventh aspect of the embodiments of the present invention, there is provided a user equipment, including:
a processing module, configured to generate indication information, where the indication information is used to indicate an adopted number, where the number is a number of a first-class precoding vector in a plurality of precoding vectors that need to be fed back when the plurality of precoding vectors include the first-class precoding vector and a second-class precoding vector;
and the transceiver module is used for transmitting the indication information.
According to an eighth aspect of the embodiments of the present invention, there is provided an access device, including:
a transceiver module, configured to receive indication information, where the indication information is used to indicate an adopted number, where the number is a number of a first-class precoding vector in a plurality of precoding vectors that need to be fed back when the plurality of precoding vectors include the first-class precoding vector and a second-class precoding vector;
and the processing module is used for determining the number according to the indication information.
According to a ninth aspect of the embodiments of the present invention, there is provided an indication method including:
the method comprises the steps that user equipment generates indication information, wherein the indication information is used for indicating the adopted number, and the number is the number of first-class precoding vectors in a plurality of precoding vectors when the plurality of precoding vectors needing to be fed back comprise first-class precoding vectors and second-class precoding vectors;
and the user equipment sends the indication information.
According to a tenth aspect of the embodiments of the present invention, there is provided an indication method, including:
the method comprises the steps that an access device receives indication information, wherein the indication information is used for indicating the adopted number, and the number is the number of first-class precoding vectors in a plurality of precoding vectors when the plurality of precoding vectors needing to be fed back comprise first-class precoding vectors and second-class precoding vectors;
and the access equipment determines the number according to the indication information.
According to an eleventh aspect of the embodiments of the present invention, there is provided an access device, including:
a processing module, configured to generate indication information, where the indication information is used to indicate an adopted number, where the number is a number of a first-class precoding vector in a plurality of precoding vectors that need to be fed back when the plurality of precoding vectors include the first-class precoding vector and a second-class precoding vector;
and the transceiver module is used for transmitting the indication information.
According to a twelfth aspect of the embodiments of the present invention, there is provided a user equipment, including:
a transceiver module, configured to receive indication information, where the indication information is used to indicate an adopted number, where the number is a number of a first-class precoding vector in a plurality of precoding vectors that need to be fed back when the plurality of precoding vectors include the first-class precoding vector and a second-class precoding vector;
and the processing module is used for determining the number according to the indication information.
According to a thirteenth aspect of an embodiment of the present invention, there is provided an indication method including:
the access equipment generates indication information, wherein the indication information is used for indicating the adopted number, and the number is the number of the first-class precoding vectors in the plurality of precoding vectors when the plurality of precoding vectors needing to be fed back comprise the first-class precoding vectors and the second-class precoding vectors;
and the access equipment sends the indication information.
According to a fourteenth aspect of the embodiments of the present invention, there is provided an indication method, including:
the method comprises the steps that user equipment receives indication information, wherein the indication information is used for indicating the adopted number, and the number is the number of first-class precoding vectors in a plurality of precoding vectors when the plurality of precoding vectors needing to be fed back comprise first-class precoding vectors and second-class precoding vectors;
and the user equipment determines the number according to the indication information.
According to a fifteenth aspect of an embodiment of the present invention, there is provided a user equipment, including:
a processing module, configured to generate configuration information, where the configuration information is used to configure multiple quantities, where each quantity is the quantity of a first precoding vector in multiple precoding vectors when the multiple precoding vectors that need to be fed back include the first precoding vector and a second precoding vector;
and the transceiver module is used for transmitting the configuration information.
According to a sixteenth aspect of the embodiments of the present invention, there is provided an access device, including:
a transceiver module, configured to receive configuration information, where the configuration information is used to configure multiple quantities, where each quantity is the quantity of a first precoding vector in multiple precoding vectors when the multiple precoding vectors that need to be fed back include the first precoding vector and a second precoding vector;
and the processing module is used for configuring various quantities according to the configuration information.
According to a seventeenth aspect of the embodiments of the present invention, there is provided a configuration method, including:
the user equipment generates configuration information, wherein the configuration information is used for configuring multiple quantities, and each quantity is the quantity of a first type precoding vector in multiple precoding vectors when the multiple precoding vectors needing to be fed back contain the first type precoding vector and a second type precoding vector;
the user equipment sends the configuration information.
According to an eighteenth aspect of the embodiments of the present invention, there is provided a configuration method including:
the method comprises the steps that the access equipment receives configuration information, wherein the configuration information is used for configuring multiple quantities, and each quantity is the quantity of a first type precoding vector in multiple precoding vectors when the multiple precoding vectors needing to be fed back contain the first type precoding vector and a second type precoding vector;
and the access equipment configures various quantities according to the configuration information.
According to a nineteenth aspect of the embodiments of the present invention, there is provided an access device, including:
a processing module, configured to generate configuration information, where the configuration information is used to configure multiple quantities, where each quantity is the quantity of a first precoding vector in multiple precoding vectors when the multiple precoding vectors that need to be fed back include the first precoding vector and a second precoding vector;
and the transceiver module is used for transmitting the configuration information.
According to a twentieth aspect of an embodiment of the present invention, there is provided a user equipment, including:
a transceiver module, configured to receive configuration information, where the configuration information is used to configure multiple quantities, where each quantity is the quantity of a first precoding vector in multiple precoding vectors when the multiple precoding vectors that need to be fed back include the first precoding vector and a second precoding vector;
and the processing module is used for configuring various quantities according to the configuration information.
According to a twenty-first aspect of embodiments of the present invention, there is provided a configuration method, including:
the access equipment generates configuration information, wherein the configuration information is used for configuring multiple quantities, and each quantity is the quantity of a first type precoding vector in multiple precoding vectors when the multiple precoding vectors needing to be fed back contain the first type precoding vector and a second type precoding vector;
the access device sends the configuration information.
According to a twenty-second aspect of the embodiments of the present invention, there is provided a configuration method, including:
the method comprises the steps that user equipment receives configuration information, wherein the configuration information is used for configuring multiple quantities, and each quantity is the quantity of a first precoding vector in multiple precoding vectors when the multiple precoding vectors needing to be fed back contain the first precoding vector and a second precoding vector;
and the user equipment configures various quantities according to the configuration information.
According to a twenty-third aspect of embodiments of the present invention, there is provided a processor for performing the above-mentioned various methods. In the course of performing these methods, the processes of the above-mentioned methods relating to the transmission of the above-mentioned information and the reception of the above-mentioned information may be understood as a process of outputting the above-mentioned information by a processor, and a process of receiving the above-mentioned information by a processor. Specifically, upon outputting the information, the processor outputs the information to the transceiver for transmission by the transceiver. Further, the information may need to be processed after being output by the processor before reaching the transceiver. Similarly, when the processor receives the input information, the transceiver receives the information and inputs the information into the processor. Further, after the transceiver receives the information, the information may need to be processed before being input to the processor.
Based on the above principle, for example, the indication information received in the foregoing method may be understood as the indication information received by the processor. As another example, sending the indication may be understood as the processor outputting the indication.
As such, the operations related to the processor, such as transmitting, sending and receiving, may be more generally understood as operations related to the processor output and receiving input than operations directly performed by the rf circuitry and antenna, if not specifically stated or if not contradicted by their actual role or inherent logic in the related description.
In a specific implementation, the processor may be a processor dedicated to performing the methods, or may be a processor that executes computer instructions in a memory to perform the methods, such as a general-purpose processor, where the processor and the memory are part of a communication device, such as a communication device. The Memory may be a non-transitory (non-transitory) Memory, such as a Read Only Memory (ROM), which may be integrated on the same chip as the processor or may be separately disposed on different chips.
According to a twenty-fourth aspect of embodiments of the present invention, there is provided a computer-readable storage medium comprising instructions which, when run on a computer, cause the computer to perform any of the methods described above.
In particular implementations, the computer-readable storage medium described above is non-transitory.
According to a twenty-fifth aspect of embodiments of the present invention there is provided a computer program product containing instructions which, when run on a computer, cause the computer to perform any of the methods described above.
In one possible design of the above aspect, in the plurality of precoding vectors, each of the second type precoding vectors is orthogonal to each other and any of the second type precoding vectors and any of the first type precoding vectors are orthogonal to each other.
In one possible design, as in any of the above aspects, the component vectors
Figure BDA0001473056000000101
And
Figure BDA0001473056000000102
are all selected from the same set of vectors in which any two vectors are orthogonal to each other.
In one possible design, as in any of the above aspects, whenWhen the indication information is used for indicating a plurality of precoding vectors and the plurality of precoding vectors comprise j first-class precoding vectors and k second-class precoding vectors, the indication information is used for indicating component vectors
Figure BDA0001473056000000103
Phase parameter
Figure BDA0001473056000000104
And a superposition coefficient alpham,i,r；
When the indication information is used to indicate a plurality of precoding vectors, and the plurality of precoding vectors includes j first-class precoding vectors and k groups of second-class precoding vectors, the indication information is specifically used to indicate component vectors
Figure BDA0001473056000000105
Overlap factor alpham,i,rAnd k sets of precoding vectors of the second type.
According to the technical scheme provided by the embodiment of the invention, for a plurality of layers transmitted simultaneously, the precoding vectors of partial layers can be constructed according to the beam combination technology, and the precoding vectors of other layers can be constructed according to the beam selection technology. Under the condition, the technical scheme provided by the embodiment of the invention is beneficial to effectively limiting the overhead brought by the indication of the precoding vector while improving the precision of the precoding vector.
Drawings
Fig. 1 is an exemplary schematic diagram of a wireless communication network in accordance with an embodiment of the present invention;
FIG. 2 is a diagram illustrating an exemplary logical structure of a user equipment according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an exemplary logical structure of an access device according to an embodiment of the present invention;
FIG. 4 is a diagram of an exemplary hardware configuration of a communication device in accordance with one embodiment of the present invention;
fig. 5 is a diagram of an exemplary interaction process of a precoding method according to an embodiment of the present invention.
Detailed Description
As known in the background art, the beam combining technique can improve the accuracy of the precoding vector, but can also greatly increase the indication overhead. In contrast, when indicating a precoding matrix, the beam selection technology only needs to report the index of the selected candidate matrix, which can reduce the indication overhead to a great extent, but the accuracy of the precoding matrix is not high.
The next generation wireless communication system currently under development may also be referred to as a New Radio (NR) system or a 5G system. Recent research advances have shown that in next generation wireless communication systems, both beam selection techniques and beam combining techniques will be adopted in order to fully exploit the respective advantages of both techniques. Specifically, when the number of layers does not exceed 2, a beam combining technique is used to determine a precoding vector. When the number of layers exceeds 2 layers, a beam selection technique is used to determine a precoding matrix. It can be known that, for example, when the number of layers is 2, precoding vectors of each layer are constructed according to the beam combining technique; when the number of layers is 3, a precoding matrix including 3 precoding vectors will be selected according to the beam selection technique. It follows that although both the beam selection technique and the beam combining technique are adopted, only one of the two precoding techniques can actually be used at the same time. Therefore, when the number of layers exceeds 2, the accuracy of the precoding matrix is limited by the capacity of the codebook, and the transmission effect of any one layer is limited by the low-accuracy precoding vector. Therefore, in the next generation wireless communication system, when the number of layers is high, the overhead caused by indicating a precoding vector cannot be effectively limited while the precision of a precoding matrix is improved.
In view of this situation, the embodiment of the present invention provides a technical solution to construct precoding vectors of some layers according to a beam combining technique and construct precoding vectors of other layers according to a beam selection technique for multiple layers transmitted simultaneously. In this case, the transmission procedure of the above layer will use two precoding techniques at the same time, so that the respective advantages of the two precoding techniques can be fully utilized. Therefore, the technical scheme provided by the embodiment of the invention is beneficial to improving the precision of the precoding vector and effectively limiting the overhead brought by the indication of the precoding vector.
The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, for convenience of description, the technical solutions to be described below are described by taking feedback of downlink precoding vectors as an example. When feeding back the downlink precoding vector, the user equipment receives a reference signal sent by the access equipment, determines and indicates the precoding vector to the access equipment. It should be understood by those skilled in the art after reading the technical solutions described below that the technical solutions provided in the embodiments of the present invention are also applicable to feeding back uplink precoding vectors. When feeding back the uplink precoding vector, the access equipment receives a reference signal sent by the user equipment, determines and indicates the precoding vector to the user equipment.
Fig. 1 is an exemplary diagram of a wireless communication network 100 in accordance with one embodiment of the present invention. As shown in FIG. 1, the wireless communication network 100 includes base stations 102-106 and terminal devices 108-122, wherein the base stations 102-106 can communicate with each other via backhaul (backhaul) links (shown as straight lines between the base stations 102-106), and the backhaul links can be wired backhaul links (e.g., optical fiber, copper cable) or wireless backhaul links (e.g., microwave). The terminal devices 108-122 can communicate with the corresponding base stations 102-106 via wireless links (as indicated by the broken lines between the base stations 102-106 and the terminal devices 108-122).
The base stations 102-106 generally act as access devices to provide wireless access services to the terminal devices 108-122 generally acting as user devices. Specifically, each base station corresponds to a service coverage area (which may also be referred to as a cell, as shown by the oval areas in fig. 1), and a terminal device entering the service coverage area can communicate with the base station through a wireless signal to receive a wireless access service provided by the base station. The service coverage areas of the base stations may overlap, and terminal devices in the overlapping areas can receive wireless signals from a plurality of base stations, so that the base stations can cooperate with each other to provide services for the terminal devices. For example, multiple base stations may use a Coordinated multipoint (CoMP) technology to provide services for terminal devices in the overlapping area. For example, as shown in fig. 1, there is an overlap between service coverage areas of base station 102 and base station 104, and terminal device 112 is located in the overlap area, so that terminal device 112 can receive wireless signals from base station 102 and base station 104, and base station 102 and base station 104 can cooperate with each other to provide service for terminal device 112. For another example, as shown in fig. 1, the service coverage areas of base station 102, base station 104, and base station 106 have a common overlapping area, and terminal device 120 is located in the overlapping area, so that terminal device 120 can receive wireless signals from base stations 102, 104, and 106, and base stations 102, 104, and 106 can cooperate with each other to provide service for terminal device 120.
Depending on the wireless communication technology used, the base station may also be referred to as a node B (NodeB), an evolved NodeB (eNodeB), an Access Point (AP), and the like. In addition, the base station may be divided into a Macro base station for providing a Macro cell (Macro cell), a micro base station for providing a micro cell (Pico cell), a Femto base station for providing a Femto cell (Femto cell), and the like according to the size of the service coverage area provided. As wireless communication technology continues to evolve, future base stations may also take on other names.
The terminal devices 108-122 may be various wireless communication devices with wireless communication functions, such as, but not limited to, a mobile cellular phone, a cordless phone, a Personal Digital Assistant (PDA), a smart phone, a notebook computer, a tablet computer, a wireless data card, a wireless Modem (Modem), or a wearable device such as a smart watch. With the advent of Internet of Things (IOT) technology and Vehicle-to-electronic (V2X) technology, more and more devices that did not previously have communication capabilities, such as, but not limited to, home appliances, vehicles, tool equipment, service equipment, and service facilities, began to gain wireless communication capabilities by configuring wireless communication units so that they could access wireless communication networks and accept remote control. Such a device has a wireless communication function due to the arrangement of the wireless communication unit, and thus also belongs to the category of wireless communication devices. Furthermore, the terminal devices 108-122 may also be referred to as mobile stations, mobile devices, mobile terminals, wireless terminals, handheld devices, clients, and the like.
The base stations 102 to 106 and the terminal devices 108 to 122 may be configured with Multiple antennas to support MIMO (Multiple Input Multiple Output) technology. Further, the base stations 102 to 106 and the terminal devices 108 to 122 may support both Single-User MIMO (SU-MIMO) technology and Multi-User MIMO (MU-MIMO), where the MU-MIMO may be implemented based on Space Division Multiple Access (SDMA) technology. Due to the configuration of Multiple antennas, base stations 102-106 and terminal devices 108-122 may also flexibly support Single Input Single Output (SISO), Single Input Multiple Output (SIMO), and Multiple Input Single Output (MISO) technologies to implement various Diversity (such as, but not limited to, Transmit Diversity and Receive Diversity) and Multiplexing technologies, where the Diversity technologies may include, but not limited to, Transmit Diversity (TD) technology and Receive Diversity (RD) technology, and the Multiplexing technology may be Spatial Multiplexing (Spatial Multiplexing) technology. Moreover, the various techniques described above may also include various implementations, for example, the Transmit Diversity techniques may include Space-Time Transmit Diversity (STTD), Space-Frequency Transmit Diversity (SFTD), Time-Switched Transmit Diversity (TSTD), Frequency-Switched Transmit Diversity (FSTD), Orthogonal Transmit Diversity (OTD), Cyclic Delay Diversity (CDD), and the like, as well as Diversity schemes obtained by deriving, evolving, and combining the Diversity schemes. For example, the LTE (Long Term Evolution) standard currently adopts Space Time Block Coding (STBC), Space Frequency Block Coding (SFBC), CDD and other transmission diversity methods. The transmit diversity has been described generally by way of example. Those skilled in the art will appreciate that transmit diversity includes a variety of other implementations in addition to the examples described above. Therefore, the above description should not be construed as limiting the technical solution of the present invention, which should be construed to be applicable to various possible transmit diversity schemes.
In addition, the base stations 102-106 and the terminal devices 108-122 may communicate using various wireless communication technologies, such as, but not limited to, Time Division Multiple Access (TDMA) technology, Frequency Division Multiple Access (FDMA) technology, Code Division Multiple Access (CDMA) technology, Time Division-Synchronous Code Division Multiple Access (TD-SCDMA), Orthogonal Frequency Division Multiple Access (Orthogonal FDMA, OFDMA) technology, Single Carrier FDMA (SC-FDMA) technology, Space Division Multiple Access (SDMA) technology, and evolution and derivation of these technologies. The above-mentioned wireless communication Technology is adopted as a Radio Access Technology (RAT) by many wireless communication standards, so as to construct various wireless communication systems (or networks) widely known today, including but not limited to Global System for Mobile Communications (GSM), CDMA2000, Wideband CDMA (WCDMA), WiFi defined by 802.11 series standards, Worldwide Interoperability for Microwave Access (WiMAX), Long Term Evolution (LTE), LTE-Advanced (LTE-a), and Evolution systems of these wireless communication systems. Unless otherwise specified, the technical solutions provided by the embodiments of the present invention can be applied to the above-mentioned various wireless communication technologies and wireless communication systems. Furthermore, the terms "system" and "network" may be used interchangeably.
It should be noted that the wireless communication network 100 shown in fig. 1 is only for example and is not used to limit the technical solution of the present invention. Those skilled in the art will appreciate that the wireless communication network 100 may include other devices in a particular implementation, and that the number of base stations and terminal devices may be configured according to particular needs.
Fig. 2 is a schematic diagram of an exemplary logical structure of a user equipment 200 according to an embodiment of the present invention. As shown in fig. 2, the user equipment 200 includes a processing module 202 and a transceiver module 204.
The processing module 202 is configured to generate indication information, where the indication information is used to indicate a plurality of precoding vectors, where the plurality of precoding vectors include j first-class precoding vectors and k second-class precoding vectors, where j is greater than or equal to 1, k is greater than or equal to 1, and each first-class precoding vector is used to generate indication information
Figure BDA0001473056000000131
Expressed as:
Figure BDA0001473056000000132
wherein x ism,rPrecoding vectors for the first class
Figure BDA0001473056000000133
Is a sub-vector of
Figure BDA0001473056000000134
Wherein the content of the first and second substances,
Figure BDA0001473056000000135
is a component vector used for constructing any sub-vector in any first-class precoding vector in the j first-class precoding vectors, and
Figure BDA0001473056000000136
any two component vectors in are orthogonal to each other, αm，i，rIs a sub-vector xm，rVector of medium component
Figure BDA0001473056000000137
M is more than or equal to 1 and less than or equal to j, L>1, r ═ 1 or 2; each second-class precoding vector
Figure BDA0001473056000000138
Expressed as:
Figure BDA0001473056000000139
wherein the content of the first and second substances,
Figure BDA00014730560000001310
for constructing precoding vectors of the second kind
Figure BDA00014730560000001311
The vector of the components of (a) is,
Figure BDA00014730560000001312
precoding vectors for the second class
Figure BDA00014730560000001322
N is more than or equal to 1 and less than or equal to k.
The transceiver module 204 is configured to send the indication information.
As can be seen from the user equipment 200, in the technical solution provided in the embodiment of the present invention, the indicated precoding vectors include a first type precoding vector and a second type precoding vector at the same time, where the first type precoding vector is a precoding vector constructed based on a beam combining technique, and the second type precoding vector is a precoding vector constructed based on a beam selecting technique. In this way, in the technical solution provided in the embodiment of the present invention, at the same time, the two precoding techniques may be used simultaneously, where for multiple layers transmitted simultaneously, some layers use the beam combining technique to construct precoding vectors, and other layers use the beam selection technique to construct precoding vectors. For example, if the plurality of precoding vectors include 4 precoding vectors, where the 4 precoding vectors are specifically 1 first-type precoding vector and 3 second-type precoding vectors, and the first-type precoding vector includes 4 component vectors, the precoding matrix corresponding to the 4 precoding vectors may be represented as follows:
Figure BDA00014730560000001313
in another aspect, each precoding vector comprises two sub-vectors, e.g., each precoding vector of the first type
Figure BDA00014730560000001314
May contain xm,1And xm,2Two subvectors. As another example, each precoding vector of the second type
Figure BDA00014730560000001315
May comprise
Figure BDA00014730560000001316
And
Figure BDA00014730560000001317
two subvectors. Each sub-vector may act on a set of antenna ports corresponding to an antenna array of the access device. For example, a cross-polarized antenna array typically corresponds to two sets of antenna ports, each set of antenna ports corresponding to one polarization direction. In this case, in a precoding vector, one sub-vector may act on a group of antenna ports corresponding to one polarization direction in the antenna array, and another sub-vector may act on a group of antenna ports corresponding to another polarization direction in the antenna array. At the same time, each second-type precoding vector
Figure BDA00014730560000001318
Phase parameter of
Figure BDA00014730560000001319
Can be understood as the second type of precoding vector
Figure BDA00014730560000001320
The polarization phase difference between the two sub-vectors may also be understood as the polarization phase difference between the two groups of antenna ports corresponding to the two sub-vectors.
To reduceIn order to improve the transmission effect, among the plurality of precoding vectors, the second type precoding vectors may be designed to be orthogonal to each other, and any one of the second type precoding vectors and any one of the first type precoding vectors are orthogonal to each other. To this end, except as described above
Figure BDA00014730560000001321
In addition to any two component vectors being orthogonal to each other, it is also necessary to align the component vectors
Figure BDA0001473056000000141
Overlap factor alpham,i,rAnd phase parameter
Figure BDA0001473056000000142
Wherein the selection of at least one characteristic is further defined. For example, selection may be limited
Figure BDA0001473056000000143
When it is required
Figure BDA0001473056000000144
Are different from each other, and
Figure BDA0001473056000000145
and
Figure BDA0001473056000000146
the same vector does not exist. On the basis of the above conditions, the superposition coefficient alpha can be reasonably setm,i,rAnd phase parameter
Figure BDA0001473056000000147
The values of the first and second precoding vectors are orthogonal to each other, and the first and second precoding vectors are orthogonal to each other. For example, the superposition coefficients of the component vectors of each first-type precoding vector may be first calculated, and on the basis of the superposition coefficients, the second-type precoding vectors are orthogonal to each other and any one of the second-type precoding vectors and any one of the first-type precoding vectors are orthogonal to each otherSequentially calculating the phase parameters of each second-class precoding vector according to the requirement of intersection
Figure BDA0001473056000000148
It will be appreciated by those skilled in the art that there are many ways to implement the second type of precoding vectors to be orthogonal to each other and any second type of precoding vectors to be orthogonal to any first type of precoding vectors, and the above-mentioned methods are only used as examples and are not intended to limit the specific methods to the above-mentioned methods. In the specific implementation process, various methods may be adopted to achieve the above object, and the embodiment of the present invention does not limit the specific methods.
In addition, there are many methods for improving the transmission effect, and it is not limited that the precoding vectors of the second type are orthogonal to each other and any precoding vector of the second type is orthogonal to any precoding vector of the first type, therefore, in the specific implementation process, at least two precoding vectors in the precoding vectors may not need to be orthogonal to each other, for example, at least two precoding vectors in the precoding vectors of the second type need not be orthogonal, and/or at least one precoding vector of the second type and at least one precoding vector of the first type need not be orthogonal.
As described above, the above indication information is used to indicate a plurality of precoding vectors. In particular, the indication information is particularly for indicating a component vector
Figure BDA0001473056000000149
Phase parameter
Figure BDA00014730560000001410
And a superposition coefficient alpham,i,rSo as to indicate the plurality of precoding vectors by indicating the information. In a specific implementation process, there are many ways of indicating, for example, but not limited to, directly indicating information to be indicated, such as the information to be indicated itself or an index of the information to be indicated; the information to be indicated can also be indirectly indicated by indicating other information, wherein the other information and the information to be indicated have an association relationship; it is also possible to indicate only the information to be indicatedA portion of the information, and the other portion of the information to be indicated is known or predetermined; the specific indication method may be various combinations of the above indication methods. In a specific implementation process, a required indication manner may be selected according to a specific need, and the indication manner selected in the embodiment of the present invention is not limited, so that the indication manner related to the embodiment of the present invention is understood to cover various methods that can enable a party to be indicated to obtain information to be indicated. Meanwhile, the information to be indicated may be sent together as a whole, or may be divided into a plurality of sub-information to be sent separately, and the sending periods and/or sending opportunities of these sub-information may be the same or different. The specific sending method may refer to the prior art, and the present invention is not limited thereto.
To facilitate operations such as resource allocation and channel measurement, a frequency band carrying wireless communications may be divided into multiple narrower frequency bands at a certain granularity. For ease of description, frequency bands of different widths may be described by, for example, but not limited to, wideband and narrowband. The term wideband may refer to a system bandwidth, for example, a bandwidth corresponding to a radio frequency carrier, such as 20M (megabyte). The wideband may be divided into a plurality of narrowbands, and a narrowband may be understood as a bandwidth allocated to a terminal device, or a part of bandwidth divided from the wideband according to other requirements. The above definitions of wideband and narrowband are for the sake of example only, for the reader's understanding. For further definition of wideband and narrowband in the detailed implementation, reference may be made to the prior art.
In order to reduce the signaling overhead brought by the indication of the information, the applicable bandwidth of the information may be further specified. For example, the above component vectors
Figure BDA00014730560000001411
And
Figure BDA00014730560000001412
the precoding vectors of the first and second type for a wide band, i.e. for each narrow band within the whole wide band, are based on
Figure BDA00014730560000001413
And
Figure BDA00014730560000001414
rather than determining for each narrowband a respective component vector for the first type of precoding vector and the second type of precoding vector for that narrowband, the several component vectors are constructed. Similarly, the phase parameter can be set
Figure BDA00014730560000001415
The precoding vectors of the second type, which are applicable to the wide-band, i.e. the narrow-bands within the whole wide-band, are based on phase parameters
Figure BDA00014730560000001416
Instead of determining for each narrowband a respective phase parameter for the precoding vector of the second type for that narrowband
Figure BDA00014730560000001417
Alternatively, the phase parameter can also be set
Figure BDA0001473056000000151
Adapted for narrow bands, i.e. for each narrow band the phase parameters corresponding to that narrow band need to be determined for the precoding vectors of the second type of that narrow band
Figure BDA0001473056000000152
Overlap factor alpham,i,rThe method can be further decomposed into three parts, namely a broadband amplitude coefficient, a narrowband amplitude coefficient and a narrowband phase coefficient, and it is easy to see that the broadband amplitude coefficient is suitable for the broadband, the narrowband amplitude coefficient and the narrowband phase coefficient are suitable for the narrowband, that is, the respective narrowband amplitude coefficient and narrowband phase coefficient can be determined for each narrowband. Since the partial vectors and/or parameters are applicable to the wideband, indication can be performed only for the wideband, and indication is not required for each narrowband, so that signaling overhead caused by the indication process can be reduced.
In a specific implementation process, a vector set can be designed, and the vector setThe vectors within the sum being orthogonal to each other, the component vectors
Figure BDA0001473056000000153
And
Figure BDA0001473056000000154
are selected from this vector set. In addition, a set of phase parameters can be designed,
Figure BDA0001473056000000155
may be selected from the set of phase parameters. Furthermore, the superposition coefficient α may be referred tom,i,rThe further decomposed wideband amplitude coefficients, narrowband amplitude coefficients and narrowband phase coefficients are arranged in corresponding sets, in which case the three coefficients may be selected from the corresponding sets, respectively. At the same time, the phase parameter
Figure BDA0001473056000000156
And the composition of the superposition coefficient alpham,i,rOne or more information among the wideband amplitude coefficient, the narrowband amplitude coefficient and the narrowband phase coefficient may be further normalized, and the related content may refer to the prior art, which is not described again in the embodiments of the present invention.
The first type of precoding vector and the second type of precoding vector may be determined in various ways, and the embodiment of the present invention does not limit the specific way. For example, for the second type of precoding vector, the determination is made
Figure BDA0001473056000000157
Thereafter, each phase value in the set of phase parameters may be associated with the determined
Figure BDA0001473056000000158
Multiplying, selecting the vector which is most matched with the channel from the vectors obtained after multiplication, and determining the phase value corresponding to the vector as the phase parameter
Figure BDA0001473056000000159
In another implementation scheme, k groups of second-class precoding vectors may also be used to replace the k second-class precoding vectors, where each group of second-class precoding vectors includes at least one second-class precoding vector, and k is greater than or equal to 1. In this case, the indication information is used to indicate a plurality of precoding vectors, the plurality of precoding vectors includes j first-type precoding vectors and k groups of second-type precoding vectors, where j is greater than or equal to 1, k is greater than or equal to 1, and the first-type precoding vectors and the second-type precoding vectors are defined as described above, that is, each first-type precoding vector is defined as
Figure BDA00014730560000001510
Expressed as:
Figure BDA00014730560000001511
wherein x ism,rPrecoding vectors for the first class
Figure BDA00014730560000001512
Is a sub-vector of
Figure BDA00014730560000001513
Wherein the content of the first and second substances,
Figure BDA00014730560000001514
is a component vector used for constructing any sub-vector in any first-class precoding vector in the j first-class precoding vectors, and
Figure BDA00014730560000001515
any two component vectors in are orthogonal to each other, αm,i,rIs a sub-vector xm,rVector of medium component
Figure BDA00014730560000001516
M is more than or equal to 1 and less than or equal to j, L>1, r ═ 1 or 2; each group of pre-coded vector packets of the second typeEach second-type precoding vector in the group of second-type precoding vectors contains v second-type precoding vectors
Figure BDA00014730560000001517
Expressed as:
Figure BDA00014730560000001518
wherein the content of the first and second substances,
Figure BDA00014730560000001519
for constructing precoding vectors of the second kind
Figure BDA00014730560000001520
The vector of the components of (a) is,
Figure BDA00014730560000001521
precoding vectors for the second class
Figure BDA00014730560000001522
N is more than or equal to 1 and less than or equal to v, and v is more than or equal to 1.
The number of second-type precoding vectors included in at least two of the k second-type precoding vectors is different from each other. For example, the plurality of precoding vectors may include 1 first-type precoding vector and 2 second-type precoding vectors, wherein one second-type precoding vector includes 3 second-type precoding vectors, and another second-type precoding vector includes 2 second-type precoding vectors. Or, in the k groups of second-type precoding vectors, the number of second-type precoding vectors included in at least part or all of the k groups of second-type precoding vectors is the same. For example, the plurality of precoding vectors may include 2 first-type precoding vectors and 3 second-type precoding vectors, where two sets of the second-type precoding vectors each include 2 second-type precoding vectors, and another set of the second-type precoding vectors includes 3 second-type precoding vectors. For another example, the plurality of precoding vectors may include 2 first-type precoding vectors and 3 groups of second-type precoding vectors, where each group of second-type precoding vectors includes 2 second-type precoding vectors.
Meanwhile, the k groups of precoding vectors of the second type may be selected from a vector group set, where the vector group set includes a plurality of groups of precoding vectors of the second type. Furthermore, the number of the second-type precoding vectors included in the groups of the second-type precoding vectors is partially or totally the same.
Furthermore, the indication information is specifically used for indicating the component vector
Figure BDA0001473056000000164
Overlap factor alpham,i,rAnd k groups of precoding vectors of the second type, so as to indicate the plurality of precoding vectors by indicating the information.
To reduce interference and improve transmission efficiency, the precoding vectors of the second type in the same group of precoding vectors of the second type may be designed to be orthogonal to each other.
When the indication information is used for indicating a plurality of precoding vectors, and the plurality of precoding vectors include j first precoding vectors and k groups of second precoding vectors, the second precoding vectors can be orthogonal to each other, and any one second precoding vector and any one first precoding vector can be orthogonal to each other, so that interference is reduced, and the transmission effect is improved. Specifically, the second-type precoding vectors being orthogonal to each other not only requires that any two second-type precoding vectors in the same set of second-type precoding vectors be orthogonal to each other, but also requires that second-type precoding from different sets of second-type precoding vectors be orthogonal to each other. In a specific implementation process, the above object may be achieved by setting corresponding limits on the component vectors and the superposition coefficients and selecting k sets of second-class precoding vectors that meet specific limits, and it is understood that the specific limits are used to limit the selection of the component vectors and the phase parameters in each set of second-class precoding vectors. For example, it may be further defined that, among the plurality of precoding vectors, component vectors of any first type precoding vector or component vectors of any second precoding vector included in the k groups of second type precoding vectors may be selected from a same vector set in which any two vectors are orthogonal to each other. In other words, any component vector in each first-type precoding vector and any component vector in each set of second-type precoding vectors are from the same set. On the basis, further limitation can be added to achieve the purpose that the precoding vectors of the second type are orthogonal to each other and any precoding vector of the second type and any precoding vector of the first type are orthogonal to each other. In addition, other relevant technical details may refer to the above relevant description, and detailed descriptions are omitted.
When the indication information indicates k groups of precoding vectors of the second type, details of other technical features may refer to relevant descriptions in a scheme in which the indication information indicates k precoding vectors of the second type.
According to the technical scheme provided by the embodiment of the invention, for a plurality of layers transmitted simultaneously, the precoding vectors of partial layers can be constructed according to the beam combination technology, and the precoding vectors of other layers can be constructed according to the beam selection technology. Under the condition, the technical scheme provided by the embodiment of the invention is beneficial to effectively limiting the overhead brought by the indication of the precoding vector while improving the precision of the precoding vector.
Fig. 3 is a schematic diagram of an exemplary logical structure of an access device 300 according to an embodiment of the present invention. As shown in fig. 3, the access device 300 includes a processing module 302 and a transceiver module 304.
The transceiver module 304 is configured to receive indication information, where the indication information is used to indicate a plurality of precoding vectors, where the plurality of precoding vectors includes j first-class precoding vectors and k second-class precoding vectors, where j is greater than or equal to 1, k is greater than or equal to 1, and each first-class precoding vector is used to indicate a precoding vector of a first class
Figure BDA0001473056000000161
Expressed as:
Figure BDA0001473056000000162
wherein x ism,rPrecoding vectors for the first class
Figure BDA0001473056000000163
Is a sub-vector of
Figure BDA0001473056000000171
Wherein the content of the first and second substances,
Figure BDA0001473056000000172
is a component vector used for constructing any sub-vector in any first-class precoding vector in the j first-class precoding vectors, and
Figure BDA0001473056000000173
any two component vectors in are orthogonal to each other, αm,i,rIs a sub-vector xm,rVector of medium component
Figure BDA0001473056000000174
M is more than or equal to 1 and less than or equal to j, L>1, r ═ 1 or 2; each second-class precoding vector
Figure BDA0001473056000000175
Expressed as:
Figure BDA0001473056000000176
wherein the content of the first and second substances,
Figure BDA0001473056000000177
for constructing precoding vectors of the second kind
Figure BDA0001473056000000178
The vector of the components of (a) is,
Figure BDA0001473056000000179
precoding vectors for the second class
Figure BDA00014730560000001710
N is more than or equal to 1 and less than or equal to k.
Alternatively, the multiple precoding vectors indicated by the indication information may further include j first-type precoding vectors and k groups of second-type precoding vectors, and the related contents have been described in detail above, and therefore are not described herein again.
The processing module 302 is configured to determine the plurality of precoding vectors according to the indication information.
The details of the related technology involved in the access device 300 have been described in detail above in connection with the user equipment 200, and therefore are not described here again.
Fig. 4 is an exemplary hardware architecture diagram of a communication device 400 in accordance with an embodiment of the present invention. In a specific implementation process, the communication device may be configured to implement the user equipment, and may also be configured to implement the access device.
As shown in fig. 4, the user equipment 400 includes a processor 402, a transceiver 404, a plurality of antennas 406, a memory 408, an I/O (Input/Output) interface 410, and a bus 412. The memory 408 is further operable to store instructions 4082 and data 4084. Further, the processor 402, the transceiver 404, the memory 408, and the I/O interface 410 are communicatively coupled to each other via a bus 412, and a plurality of antennas 406 are coupled to the transceiver 404. In particular implementations, processor 402, transceiver 404, memory 408, and I/O interface 410 may be communicatively coupled to each other using connections other than bus 412.
The Processor 402 may be a general-purpose Processor, such as, but not limited to, a Central Processing Unit (CPU), or a special-purpose Processor, such as, but not limited to, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), and the like. Further, the processor 402 may be a combination of multiple processors. In particular, in the technical solution provided in the embodiment of the present invention, the processor 402 may be configured to perform, for example, an operation performed by the processing module 202 in the user equipment 200 shown in fig. 2, or an operation performed by the processing module 302 in the access equipment 300 shown in fig. 3. The processor 402 may be a processor specially designed to perform the above operations, or may be a processor that reads and executes the instructions 4082 stored in the memory 408, and the processor 402 may need the data 4084 in the process of performing the above operations.
Transceiver 404 is configured to transmit signals through at least one of a plurality of antennas 406 and receive signals through at least one of a plurality of antennas 406. In particular, in the technical solution provided in the embodiment of the present invention, the transceiver 404 may be specifically configured to be executed by at least one antenna of the multiple antennas 406, for example, an operation executed by the transceiver module 204 in the user equipment 200 shown in fig. 2, or an operation executed by the transceiver module 304 in the access equipment 300 shown in fig. 3.
The Memory 408 may be various types of storage media, such as Random Access Memory (RAM), Read Only Memory (ROM), Non-Volatile RAM (NVRAM), Programmable ROM (PROM), Erasable PROM (EPROM), Electrically Erasable PROM (EEPROM), flash Memory, optical Memory, and registers. The memory 408 is specifically configured to store the instruction 4082 and the data 4084, and the processor 402 may perform the above operations by reading and executing the instruction 4082 stored in the memory 408, where the data 4084 may be needed in the above operations.
I/O interface 410 is used to receive instructions and/or data from and output instructions and/or data to peripheral devices.
It should be noted that in a specific implementation, the user equipment 400 may also include other hardware devices, which are not listed here.
Fig. 5 is a diagram illustrating an exemplary interaction process of a precoding method 500 according to an embodiment of the present invention.
Step 502, the user equipment generates indication information, the indication information is used for indicating a plurality of precoding vectors, the plurality of precoding vectors comprises j precoding vectorsA first-class precoding vector and k second-class precoding vectors, wherein j is more than or equal to 1, k is more than or equal to 1, and each first-class precoding vector
Figure BDA0001473056000000181
Expressed as:
Figure BDA0001473056000000182
wherein x ism,rPrecoding vectors for the first class
Figure BDA0001473056000000183
Is a sub-vector of
Figure BDA0001473056000000184
Wherein the content of the first and second substances,
Figure BDA0001473056000000185
is a component vector used for constructing any sub-vector in any first-class precoding vector in the j first-class precoding vectors, and
Figure BDA0001473056000000186
any two component vectors in are orthogonal to each other, αm,i,rIs a sub-vector xm,rVector of medium component
Figure BDA0001473056000000187
M is more than or equal to 1 and less than or equal to j, L>1, r ═ 1 or 2; each second-class precoding vector
Figure BDA0001473056000000188
Expressed as:
Figure BDA0001473056000000189
wherein the content of the first and second substances,
Figure BDA00014730560000001810
for constructing precoding vectors of the second kind
Figure BDA00014730560000001811
The vector of the components of (a) is,
Figure BDA00014730560000001812
precoding vectors for the second class
Figure BDA00014730560000001813
N is more than or equal to 1 and less than or equal to k.
Alternatively, the multiple precoding vectors indicated by the indication information may further include j first-type precoding vectors and k groups of second-type precoding vectors, and the related contents have been described in detail above, and therefore are not described herein again.
Step 504, the user equipment sends the indication information.
Step 506, the access device receives the indication information.
Step 508, the access device determines the multiple precoding vectors according to the indication information.
The details of the related art involved in the precoding method 500 have been described in detail above with reference to the user equipment 200 described in fig. 2, and therefore are not described herein again.
It should be noted that the various embodiments described above are described by taking the feedback of the downlink precoding vector as an example. However, it should be understood by those skilled in the art that the technical solutions provided in the above embodiments may also be applied to feeding back uplink precoding vectors. When the technical scheme provided by the embodiment of the invention is applied to feeding back the uplink precoding vector, the operation executed by the user equipment and the access equipment is changed. Specifically, in this case, operations performed by the user equipment or a specific module or device in the user equipment in the above embodiments will be changed to be performed by the access equipment or a corresponding module or device in the access equipment, and operations performed by the access equipment or a specific module or device in the access equipment in the above embodiments will be changed to be performed by a corresponding module or device in the user equipment or the user equipment.
On the other hand, when the fed-back precoding vector includes both the first type precoding vector and the second type precoding vector, the number of the first type precoding vectors in the fed-back precoding vector may be configured in advance. In a specific implementation process, an appropriate configuration scheme may be selected to configure the number according to specific needs, for example, but not limited to, predefined and dynamic indication in a communication standard, and some common setting methods are described below. In the following description, the number configured in various manners or predefined refers to the number of first precoding vectors in a plurality of precoding vectors that need to be fed back when the plurality of precoding vectors simultaneously include a first precoding vector and a second precoding vector.
The first way is to predefine a unique number in the communication standard, in which case the user equipment and the access equipment can communicate based on this number. It will be appreciated that this approach is generally applicable to situations where the number, once set, does not change frequently. In the implementation process, the user equipment and the access equipment are usually written with corresponding numbers before the factory shipment, and the modification of the numbers usually occurs in the system upgrade process.
A second way is to predefine a plurality of numbers in the communication standard, in which case one of the user equipment and the access equipment determines which number to use and indicates the used number to the other. In the implementation process, the user equipment and the access device are usually written with the above-mentioned quantities before the factory, and the modification of these quantities usually occurs in the system upgrade process. And an indication of the number employed may be sent, for example and without limitation, by one of the following signaling:
physical layer signaling;
media access control layer signaling;
radio resource control signaling.
Physical Layer signaling, also referred to as Layer 1 (L1) signaling, may be typically carried by a control portion in a physical Layer frame. Typical examples of the L1 signaling are Downlink Control Information (DCI) carried in a Physical Downlink Control Channel (PDCCH) and Uplink Control Information (UCI) carried in a Physical Uplink Control Channel (PUCCH) defined in the LTE standard. In some cases, the L1 signaling may also be carried by a data part in a Physical layer frame, for example, UCI may also be sometimes carried by a Physical Uplink Shared Channel (PUSCH). It is to be appreciated that the transmission period or signaling period of the L1 signaling is usually the period of the physical layer frame, so such signaling is usually used to implement some dynamic control to convey some frequently changing information, for example, the resource allocation information can be transmitted by physical layer signaling.
Media Access Control (MAC) Layer signaling belongs to Layer 2 signaling, which may be typically carried by, for example and without limitation, a header of a Layer 2 frame. The header may also carry information such as, but not limited to, a source address and a destination address. In addition to the frame header, the second layer frame typically contains a frame body. In some cases, the L2 signaling may also be carried by the body of the second layer frame. Typical examples of the second layer signaling are the signaling carried in a Frame Control (Frame Control) field in a header of a MAC Frame in the 802.11 series standard, or a MAC Control Entity (MAC-CE) defined in some protocols. The second layer frame may typically be carried in the data portion of the physical layer frame. The above quantities may also be sent by other second layer signalling than medium access control layer signalling.
Radio Resource Control (RRC) signaling belongs to Layer 3 signaling, which is typically some Control message, and L3 signaling may be typically carried in a frame body of a second Layer frame. The transmission period or control period of the L3 signaling is usually long, and is suitable for transmitting some information that does not change frequently, for example, in some existing communication standards, the L3 signaling is usually used to carry some configuration information. The above number may also be sent by other layer three signaling than RRC signaling.
The above description is only a schematic description of the physical layer signaling, the MAC layer signaling, the RRC signaling, the first layer signaling, the second layer signaling, and the third layer signaling, and specific details of the three signaling may refer to the prior art, and therefore are not described herein again.
If the number is determined by the ue and indicated to the access device, the number indicating process may be as follows. On the user equipment side, the user equipment generates indication information, wherein the indication information is used for indicating the adopted quantity, and the operation can be specifically executed by a processing module in the user equipment; subsequently, the user equipment sends the generated indication information, and specifically, the user equipment sends the indication information to the access device, which may be specifically performed by a transceiver module in the user equipment. On the access device side, the access device receives the indication information, as described above, the indication information is used to indicate the number used, and the operation may be specifically executed by a transceiver module in the access device; subsequently, the access device determines the number according to the indication information, and the operation may be specifically executed by a processing module in the access device.
If the number is determined by the access device and indicates the user equipment, the number indicating process may be as follows. On the side of the access device, the access device generates indication information, where the indication information is used to indicate the number used, and the operation may be specifically executed by a processing module in the access device; subsequently, the access device sends the generated indication information, and specifically, the access device sends the indication information to the user equipment, which may be specifically performed by a transceiver module in the access device. On the user equipment side, the user equipment receives the indication information, as described above, the indication information is used to indicate the number used, and the operation may be specifically executed by a transceiver module in the user equipment; subsequently, the user equipment determines the number according to the indication information, and the operation may be specifically executed by a processing module in the user equipment.
In the third method, one of the user equipment and the access equipment configures a plurality of numbers to the other in advance, in other words, the plurality of numbers are not written before the user equipment and the access equipment leave the factory as described in the second method, but are configured in a process of requiring the user equipment and the access equipment to communicate. In this case, it is determined by one of the user equipment and the access equipment which of the above numbers is adopted, and the other is indicated with the adopted above number, wherein the second manner may be referred to for determining and indicating the relevant content of the above number.
In particular implementations, the various numbers may be configured by, for example, but not limited to, one of the following signaling:
physical layer signaling;
media access control layer signaling;
radio resource control signaling.
If the plurality of numbers are configured to the access device by the user equipment, the number configuration process may be as follows. On the user equipment side, the user equipment generates configuration information, the configuration information is used for configuring the plurality of quantities, and the operation can be specifically executed by a processing module in the user equipment; subsequently, the user equipment sends the generated configuration information, and specifically the user equipment sends the configuration information to the access device, which may specifically be performed by a transceiver module in the user equipment. On the access device side, the access device receives the configuration information, as described above, the configuration information is used to configure the plurality of quantities, and the operation may be specifically executed by the transceiver module in the access device; subsequently, the access device configures the plurality of quantities according to the configuration information, which may be specifically performed by a processing module in the access device.
If the plurality of numbers are configured to the user equipment by the access equipment, the configuration process of the numbers may be as follows. At the side of the access device, the access device generates configuration information, where the configuration information is used to configure the multiple quantities, and the operation may be specifically executed by a processing module in the access device; subsequently, the access device sends the generated configuration information, and specifically, the access device sends the configuration information to the user equipment, which may be specifically performed by a transceiver module in the access device. On the user equipment side, the user equipment receives the configuration information, as described above, the configuration information is used to configure the plurality of quantities, and the operation may be specifically executed by a transceiver module in the user equipment; subsequently, the user equipment configures the plurality of quantities according to the configuration information, which may be specifically performed by a processing module in the user equipment.
In a specific implementation, the above number of different configuration schemes and the above number of different indication schemes may be combined according to needs, such as but not limited to, communication standards or overall needs of a communication system design, and the embodiments of the present invention should be understood to cover various combinations.
In the above various manners, the processing module and the transceiver module in the user equipment may be the processing module 202 and the transceiver module 204 in the user equipment 200, respectively; the processing module and the transceiver module in the access device may be the processing module 302 and the transceiver module 304 in the access device 300, respectively.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
In summary, the above description is only an example of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A user device, comprising:
a processing module for generating indication information, wherein,
the indication information is used for indicating a plurality of precoding vectors, the plurality of precoding vectors comprise j first-class precoding vectors and k second-class precoding vectors, j is not less than 1, k is not less than 1, and each first-class precoding vector
Figure FDA0003037836990000011
Expressed as:
Figure FDA0003037836990000012
wherein x ism,rPrecoding vectors for the first class
Figure FDA0003037836990000013
Is a sub-vector of
Figure FDA0003037836990000014
Wherein the content of the first and second substances,
Figure FDA0003037836990000015
is a component vector used for constructing any sub-vector in any first-class precoding vector in the j first-class precoding vectors, and
Figure FDA0003037836990000016
any two component vectors in are orthogonal to each other, αm,i,rIs a sub-vector xm,rVector of medium component
Figure FDA0003037836990000017
M is more than or equal to 1 and less than or equal to j, L>1, r ═ 1 or 2; each second-class precoding vector
Figure FDA0003037836990000018
Expressed as:
Figure FDA0003037836990000019
wherein the content of the first and second substances,
Figure FDA00030378369900000110
for constructing precoding vectors of the second kind
Figure FDA00030378369900000111
The vector of the components of (a) is,
Figure FDA00030378369900000112
precoding vectors for the second class
Figure FDA00030378369900000113
N is more than or equal to 1 and less than or equal to k; alternatively, the first and second electrodes may be,
the indication information is used for indicating a plurality of precoding vectors, the plurality of precoding vectors comprise j first-class precoding vectors and k groups of second-class precoding vectors, wherein jNot less than 1, k not less than 1, each first-type precoding vector
Figure FDA00030378369900000114
Expressed as:
Figure FDA00030378369900000115
wherein x ism,rPrecoding vectors for the first class
Figure FDA00030378369900000116
Is a sub-vector of
Figure FDA00030378369900000117
Wherein the content of the first and second substances,
Figure FDA00030378369900000118
is a component vector used for constructing any sub-vector in any first-class precoding vector in the j first-class precoding vectors, and
Figure FDA00030378369900000119
any two component vectors in are orthogonal to each other, αm,i,rIs a sub-vector xm,rVector of medium component
Figure FDA00030378369900000120
M is more than or equal to 1 and less than or equal to j, L>1, r ═ 1 or 2; each group of second-type precoding vectors contains v second-type precoding vectors, each second-type precoding vector in the group of second-type precoding vectors
Figure FDA00030378369900000121
Expressed as:
Figure FDA00030378369900000122
wherein the content of the first and second substances,
Figure FDA0003037836990000021
for constructing precoding vectors of the second kind
Figure FDA0003037836990000022
The vector of the components of (a) is,
Figure FDA0003037836990000023
precoding vectors for the second class
Figure FDA0003037836990000024
N is more than or equal to 1 and less than or equal to v, and v is more than or equal to 1;
wherein, when the indication information is used for indicating a plurality of precoding vectors and the plurality of precoding vectors comprise j first-class precoding vectors and k second-class precoding vectors, the indication information is used for indicating component vectors
Figure FDA0003037836990000025
Phase parameter
Figure FDA0003037836990000026
And a superposition coefficient alpham,i,r(ii) a When the indication information is used for indicating a plurality of precoding vectors and the plurality of precoding vectors comprise j first type precoding vectors and k groups of second type precoding vectors, the indication information is used for indicating component vectors
Figure FDA0003037836990000027
Overlap factor alpham,i,rAnd k sets of second-type precoding vectors;
and the transceiver module is used for transmitting the indication information.
2. The user equipment of claim 1, wherein each of the plurality of precoding vectors of the second type is orthogonal to each other and any precoding vector of the second type and any precoding vector of the first type are orthogonal to each other.
3. The user equipment of claim 1 or 2, wherein the component vector
Figure FDA0003037836990000028
And
Figure FDA0003037836990000029
are all selected from the same set of vectors in which any two vectors are orthogonal to each other.
4. An access device, comprising:
a transceiver module for receiving the indication information, wherein,
the indication information is used for indicating a plurality of precoding vectors, the plurality of precoding vectors comprise j first-class precoding vectors and k second-class precoding vectors, j is not less than 1, k is not less than 1, and each first-class precoding vector
Figure FDA00030378369900000210
Expressed as:
Figure FDA00030378369900000211
wherein x ism,rPrecoding vectors for the first class
Figure FDA00030378369900000212
Is a sub-vector of
Figure FDA00030378369900000213
Wherein the content of the first and second substances,
Figure FDA00030378369900000214
is a component vector used for constructing any sub-vector in any first-class precoding vector in the j first-class precoding vectors, and
Figure FDA00030378369900000215
any two component vectors in are orthogonal to each other, αm,i,rIs a sub-vector xm,rVector of medium component
Figure FDA00030378369900000216
M is more than or equal to 1 and less than or equal to j, L>1, r ═ 1 or 2; each second-class precoding vector
Figure FDA00030378369900000217
Expressed as:
Figure FDA00030378369900000218
wherein the content of the first and second substances,
Figure FDA00030378369900000219
for constructing precoding vectors of the second kind
Figure FDA00030378369900000220
The vector of the components of (a) is,
Figure FDA00030378369900000221
precoding vectors for the second class
Figure FDA00030378369900000222
N is more than or equal to 1 and less than or equal to k; alternatively, the first and second electrodes may be,
the indication information is used for indicating a plurality of precoding vectors, the plurality of precoding vectors comprise j first-class precoding vectors and k groups of second-class precoding vectors, wherein j is not less than 1, k is not less than 1, and each first-class precoding vector is not less thanCode vector
Figure FDA00030378369900000223
Expressed as:
Figure FDA0003037836990000031
wherein x ism,rPrecoding vectors for the first class
Figure FDA0003037836990000032
Is a sub-vector of
Figure FDA0003037836990000033
Wherein the content of the first and second substances,
Figure FDA0003037836990000034
is a component vector used for constructing any sub-vector in any first-class precoding vector in the j first-class precoding vectors, and
Figure FDA0003037836990000035
any two component vectors in are orthogonal to each other, αm,i,rIs a sub-vector xm,rVector of medium component
Figure FDA0003037836990000036
M is more than or equal to 1 and less than or equal to j, L>1, r ═ 1 or 2; each group of second-type precoding vectors contains v second-type precoding vectors, each second-type precoding vector in the group of second-type precoding vectors
Figure FDA0003037836990000037
Expressed as:
Figure FDA0003037836990000038
wherein the content of the first and second substances,
Figure FDA0003037836990000039
for constructing precoding vectors of the second kind
Figure FDA00030378369900000310
The vector of the components of (a) is,
Figure FDA00030378369900000311
precoding vectors for the second class
Figure FDA00030378369900000312
N is more than or equal to 1 and less than or equal to v, and v is more than or equal to 1;
wherein, when the indication information is used for indicating a plurality of precoding vectors and the plurality of precoding vectors comprise j first-class precoding vectors and k second-class precoding vectors, the indication information is used for indicating component vectors
Figure FDA00030378369900000313
Phase parameter
Figure FDA00030378369900000314
And a superposition coefficient alpham,i,r(ii) a When the indication information is used for indicating a plurality of precoding vectors and the plurality of precoding vectors comprise j first type precoding vectors and k groups of second type precoding vectors, the indication information is used for indicating component vectors
Figure FDA00030378369900000315
Overlap factor alpham,i,rAnd k sets of second-type precoding vectors;
and the processing module is used for determining the plurality of precoding vectors according to the indication information.
5. The access device of claim 4, wherein each of the second type precoding vectors are orthogonal to each other and any of the second type precoding vectors and any of the first type precoding vectors are orthogonal to each other among the plurality of precoding vectors.
6. The access device of claim 4 or 5, wherein the component vector
Figure FDA00030378369900000316
And
Figure FDA00030378369900000317
are all selected from the same set of vectors in which any two vectors are orthogonal to each other.
7. A precoding method, comprising:
generating indication information, wherein,
the indication information is used for indicating a plurality of precoding vectors, the plurality of precoding vectors comprise j first-class precoding vectors and k second-class precoding vectors, j is not less than 1, k is not less than 1, and each first-class precoding vector
Figure FDA00030378369900000318
Expressed as:
Figure FDA00030378369900000319
wherein x ism,rPrecoding vectors for the first class
Figure FDA00030378369900000320
Is a sub-vector of
Figure FDA0003037836990000041
Wherein the content of the first and second substances,
Figure FDA0003037836990000042
is a component vector used for constructing any sub-vector in any first-class precoding vector in the j first-class precoding vectors, and
Figure FDA0003037836990000043
any two component vectors in are orthogonal to each other, αm,i,rIs a sub-vector xm,rVector of medium component
Figure FDA0003037836990000044
M is more than or equal to 1 and less than or equal to j, L>1, r ═ 1 or 2; each second-class precoding vector
Figure FDA0003037836990000045
Expressed as:
Figure FDA0003037836990000046
wherein the content of the first and second substances,
Figure FDA0003037836990000047
for constructing precoding vectors of the second kind
Figure FDA0003037836990000048
The vector of the components of (a) is,
Figure FDA0003037836990000049
precoding vectors for the second class
Figure FDA00030378369900000410
N is more than or equal to 1 and less than or equal to k; alternatively, the first and second electrodes may be,
the indication information is used for indicating a plurality of precoding vectors, the plurality of precoding vectors comprise j first-class precoding vectors and k groups of second-class precoding vectors, j is not less than 1, k is not less than 1, and each first-class precoding vector
Figure FDA00030378369900000411
Expressed as:
Figure FDA00030378369900000412
wherein x ism,rPrecoding vectors for the first class
Figure FDA00030378369900000413
Is a sub-vector of
Figure FDA00030378369900000414
Wherein the content of the first and second substances,
Figure FDA00030378369900000415
is a component vector used for constructing any sub-vector in any first-class precoding vector in the j first-class precoding vectors, and
Figure FDA00030378369900000416
any two component vectors in are orthogonal to each other, αm,i,rIs a sub-vector xm,rVector of medium component
Figure FDA00030378369900000417
M is more than or equal to 1 and less than or equal to j, L>1, r ═ 1 or 2; each group of second-type precoding vectors contains v second-type precoding vectors, each second-type precoding vector in the group of second-type precoding vectors
Figure FDA00030378369900000418
Expressed as:
Figure FDA00030378369900000419
wherein the content of the first and second substances,
Figure FDA00030378369900000420
for constructing precoding vectors of the second kind
Figure FDA00030378369900000421
The vector of the components of (a) is,
Figure FDA00030378369900000422
precoding vectors for the second class
Figure FDA00030378369900000423
N is more than or equal to 1 and less than or equal to v, and v is more than or equal to 1;
wherein, when the indication information is used for indicating a plurality of precoding vectors and the plurality of precoding vectors comprise j first-class precoding vectors and k second-class precoding vectors, the indication information is used for indicating component vectors
Figure FDA00030378369900000424
Phase parameter
Figure FDA00030378369900000425
And a superposition coefficient alpham,i,r(ii) a When the indication information is used for indicating a plurality of precoding vectors and the plurality of precoding vectors comprise j first type precoding vectors and k groups of second type precoding vectors, the indication information is used for indicating component vectors
Figure FDA00030378369900000426
Overlap factor alpham,i,rAnd k sets of second-type precoding vectors;
and sending the indication information.
8. A precoding method, comprising:
receiving indication information, wherein,
the above-mentionedThe indication information is used for indicating a plurality of precoding vectors, the plurality of precoding vectors comprise j first-class precoding vectors and k second-class precoding vectors, j is not less than 1, k is not less than 1, and each first-class precoding vector
Figure FDA0003037836990000051
Expressed as:
Figure FDA0003037836990000052
wherein x ism,rPrecoding vectors for the first class
Figure FDA0003037836990000053
Is a sub-vector of
Figure FDA0003037836990000054
Wherein the content of the first and second substances,
Figure FDA0003037836990000055
is a component vector used for constructing any sub-vector in any first-class precoding vector in the j first-class precoding vectors, and
Figure FDA0003037836990000056
any two component vectors in are orthogonal to each other, αm,i,rIs a sub-vector xm,rVector of medium component
Figure FDA0003037836990000057
M is more than or equal to 1 and less than or equal to j, L>1, r ═ 1 or 2; each second-class precoding vector
Figure FDA0003037836990000058
Expressed as:
Figure FDA0003037836990000059
wherein the content of the first and second substances,
Figure FDA00030378369900000510
for constructing precoding vectors of the second kind
Figure FDA00030378369900000511
The vector of the components of (a) is,
Figure FDA00030378369900000512
precoding vectors for the second class
Figure FDA00030378369900000513
N is more than or equal to 1 and less than or equal to k; alternatively, the first and second electrodes may be,
the indication information is used for indicating a plurality of precoding vectors, the plurality of precoding vectors comprise j first-class precoding vectors and k groups of second-class precoding vectors, j is not less than 1, k is not less than 1, and each first-class precoding vector
Figure FDA00030378369900000514
Expressed as:
Figure FDA00030378369900000515
wherein x ism,rPrecoding vectors for the first class
Figure FDA00030378369900000516
Is a sub-vector of
Figure FDA00030378369900000517
Wherein the content of the first and second substances,
Figure FDA00030378369900000518
is a component vector used for constructing any sub-vector in any first-class precoding vector in the j first-class precoding vectors, and
Figure FDA00030378369900000519
any two component vectors in are orthogonal to each other, αm,i,rIs a sub-vector xm,rVector of medium component
Figure FDA00030378369900000520
M is more than or equal to 1 and less than or equal to j, L>1, r ═ 1 or 2; each group of second-type precoding vectors contains v second-type precoding vectors, each second-type precoding vector in the group of second-type precoding vectors
Figure FDA00030378369900000521
Expressed as:
Figure FDA00030378369900000522
wherein the content of the first and second substances,
Figure FDA0003037836990000061
for constructing precoding vectors of the second kind
Figure FDA0003037836990000062
The vector of the components of (a) is,
Figure FDA0003037836990000063
precoding vectors for the second class
Figure FDA0003037836990000064
N is more than or equal to 1 and less than or equal to v, and v is more than or equal to 1;
wherein when the indication information is used for indicating a plurality of precoding vectors and the plurality of precoding vectors comprise j first type precoding vectors and k second type precoding vectorsWhen precoding vectors, the indication information is used for indicating component vectors
Figure FDA0003037836990000065
Phase parameter
Figure FDA0003037836990000066
And a superposition coefficient alpham,i,r(ii) a When the indication information is used for indicating a plurality of precoding vectors and the plurality of precoding vectors comprise j first type precoding vectors and k groups of second type precoding vectors, the indication information is used for indicating component vectors
Figure FDA0003037836990000067
Overlap factor alpham,i,rAnd k sets of second-type precoding vectors; and determining the plurality of precoding vectors according to the indication information.
CN201711148851.0A 2017-11-17 2017-11-17 User equipment, access equipment and precoding method Active CN109802712B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201711148851.0A CN109802712B (en) 2017-11-17 2017-11-17 User equipment, access equipment and precoding method
PCT/CN2018/112259 WO2019095970A1 (en) 2017-11-17 2018-10-27 User equipment, access device, and precoding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711148851.0A CN109802712B (en) 2017-11-17 2017-11-17 User equipment, access equipment and precoding method

Publications (2)

Publication Number Publication Date
CN109802712A CN109802712A (en) 2019-05-24
CN109802712B true CN109802712B (en) 2021-08-13

Family

ID=66538485

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711148851.0A Active CN109802712B (en) 2017-11-17 2017-11-17 User equipment, access equipment and precoding method

Country Status (2)

Country Link
CN (1) CN109802712B (en)
WO (1) WO2019095970A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112751592B (en) * 2019-10-29 2021-11-19 华为技术有限公司 Method and communication device for reporting channel state information

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101636929A (en) * 2007-03-16 2010-01-27 飞思卡尔半导体公司 Generalized reference signaling scheme for mu-mimo using arbitrarily precoded reference signals
CN104737465A (en) * 2012-09-28 2015-06-24 交互数字专利控股公司 Method for wifi beamforming, feedback, and sounding (WIBEAM)
CN105406911A (en) * 2014-09-10 2016-03-16 三星电子株式会社 Channel state information reporting with basis expansion for advanced wireless communications systems
WO2017032185A1 (en) * 2015-08-24 2017-03-02 电信科学技术研究院 Methods and apparatuses for transmitting coding indication information and determining precoding matrix
CN106612135A (en) * 2015-10-19 2017-05-03 北京三星通信技术研究有限公司 A signal transmission method, reception method and device based on multi-carrier spatial modulation
CN107181513A (en) * 2016-03-11 2017-09-19 电信科学技术研究院 The feedback method and device of a kind of channel condition information

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7697626B2 (en) * 2006-01-13 2010-04-13 Interdigital Technology Corporation Method and apparatus for selecting a beam combination in a MIMO wireless communication system
CN103733540B (en) * 2011-08-16 2018-01-16 三星电子株式会社 Apparatus and method for supporting multi-antenna transmission in the wireless communication system of beam forming
US20140334564A1 (en) * 2013-05-09 2014-11-13 Samsung Electronics Co., Ltd Method and system for providing low-complexity hybrid precoding in wireless communication systems
CN104937971B (en) * 2013-11-29 2019-05-28 华为终端有限公司 Wave beam precoding mode report method, dispatching method and equipment
US9825742B2 (en) * 2014-10-03 2017-11-21 Samsung Electronics Co., Ltd. Codebook design and structure for advanced wireless communication systems
CN104883215B (en) * 2015-05-14 2017-11-03 东南大学 A kind of double codebook precoding systems of selection of LTE A based on wave beam computing and packeting average
US10009088B2 (en) * 2016-03-28 2018-06-26 Samsung Electronics Co., Ltd. Linear combination PMI codebook based CSI reporting in advanced wireless communication systems

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101636929A (en) * 2007-03-16 2010-01-27 飞思卡尔半导体公司 Generalized reference signaling scheme for mu-mimo using arbitrarily precoded reference signals
CN104737465A (en) * 2012-09-28 2015-06-24 交互数字专利控股公司 Method for wifi beamforming, feedback, and sounding (WIBEAM)
CN105406911A (en) * 2014-09-10 2016-03-16 三星电子株式会社 Channel state information reporting with basis expansion for advanced wireless communications systems
WO2017032185A1 (en) * 2015-08-24 2017-03-02 电信科学技术研究院 Methods and apparatuses for transmitting coding indication information and determining precoding matrix
CN106612135A (en) * 2015-10-19 2017-05-03 北京三星通信技术研究有限公司 A signal transmission method, reception method and device based on multi-carrier spatial modulation
CN107181513A (en) * 2016-03-11 2017-09-19 电信科学技术研究院 The feedback method and device of a kind of channel condition information

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CSI Feedback Type II for NR MIMO;NTT DOCOMO;《3GPP TSG RAN WG1 Meeting #89: R1-1708457》;20170519;全文 *

Also Published As

Publication number Publication date
WO2019095970A1 (en) 2019-05-23
CN109802712A (en) 2019-05-24

Similar Documents

Publication Publication Date Title
CN110419170B (en) Method and equipment for indicating and determining precoding vector
CN108288984B (en) Parameter indication and determination method, receiving end equipment and transmitting end equipment
CN109194377B (en) Channel measurement method and user equipment
US10680697B2 (en) Channel state information feedback method, base station, terminal device, and system
CN113938169B (en) Precoding matrix determining method and device
CN108111195B (en) Rank indication method, rank indication reporting method, device and system, and storage medium
CN109150270B (en) Channel state information feedback and receiving method, sending end equipment and receiving end equipment
EP3609114A1 (en) Channel measurement method and apparatus
EP4044445A1 (en) Channel measurement method and user equipment
US20200280963A1 (en) User equipment and access device
US20200128547A1 (en) Frequency Band Indication Method, Frequency Band Determining Method, Transmit End Device, And Receive End Device
CN109802712B (en) User equipment, access equipment and precoding method
CN109756255B (en) Channel measurement method and user equipment
CN109428636B (en) Beam indication and reporting method, network equipment and terminal
CN109802786B (en) User equipment and channel measuring method
US10594369B2 (en) Channel information feedback method, channel information determining method, receive end device, and transmit end device
US11909485B2 (en) Channel measurement method and user equipment
US20230299834A1 (en) Precoding Matrix Indication Method, User Equipment, and Access Device

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