WO2015172365A1 - 一种信号的传输和反馈方法和装置 - Google Patents
一种信号的传输和反馈方法和装置 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
- H04B7/0482—Adaptive codebooks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- 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
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- H04B7/0417—Feedback systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0667—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal
- H04B7/0673—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal using feedback from receiving side
Definitions
- the embodiments of the present invention relate to the field of communications, and in particular, to MIM0 encoding and decoding technologies of an LTE system.
- MIMO Multiple Input Multiple Output
- DM-RS Demodulation Reference Signal
- LTE-A LTE advanced evolution
- the base station transmitter beam can only be adjusted in the horizontal dimension, and the vertical dimension is a fixed downtilt angle for each user, so various beamforming/precoding techniques are based on the horizontal dimension channel. informational. In fact, because the channel is 3D, the method of fixing the downtilt often does not optimize the throughput of the system. Therefore, the beam adjustment of the vertical dimension is very important for the improvement of system performance.
- 3D beamforming is mainly: According to the 3D channel information estimated by the UE, the 3D beam shaping weight of the active antenna is adjusted, so that the main lobe of the beam is "aligned" to the target user in the 3D space, which is greatly improved. Receive signal power, improve signal to interference and noise ratio, and thus improve the throughput of the entire system.
- a comparison of a 3D beamforming and a conventional antenna fixed downtilt is shown in Figures 1 and 2.
- the antenna port model with fixed downtilt angle is shown in Figure 1.
- the dynamic downtilt antenna port model is shown in Figure 2, at each PRB ( On the physical resource block, the base station can dynamically adjust the downtilt according to the location of the service user.
- the 3D beamforming technology needs to be based on an active antenna system. Compared with the conventional antenna, the active antenna AAS provides a vertical degree of freedom.
- Figure 3 shows a schematic diagram of the AAS antenna. It can be seen that the AAS antenna has a vertical direction. Multiple antennas, so the beam can be dynamically formed in the vertical direction, adding vertical waves The degree of freedom of the beam shaping.
- FIG 4 shows a flow chart of data processing in the baseband and radio frequency network and transmitted through the AAS antenna, wherein the baseband processing part, the data stream on each layer is pre-coded and mapped to NP ports, on each port The data stream passes through the IFFT and is converted into a drive network of the radio frequency part and then transmitted through the antenna.
- Each of the drive networks is a 1 drive M network, that is, one port corresponds to M arrays.
- Figure 5 shows a schematic diagram of a downtilt grouping: In the example, 8 antenna ports, each port is 1 driving 4 arrays to form a downtilt angle, and 4 of the horizontal antenna ports
- the drive network of (port 0 ⁇ 3) has the same weighting coefficient, both pointing to the downtilt angle 0, and the antenna ports (ports 4 to 7) of the other four levels have the same weighting coefficients, all pointing to the downtilt angle 1.
- spatially multiplexed multi-stream data can only be transmitted through a horizontal beam in a fixed downtilt plane, and multiple data streams cannot be multiplexed by utilizing the characteristics of vertical space.
- an embodiment of the present invention provides a method and apparatus for communicating channel information, so as to achieve a channel parameter preference in channel transmission.
- the first network device receives the reference signal, and measures the reference signal to obtain a measurement result, and selects a first codebook in the first codebook set according to the measurement result;
- the first codebook set includes at least two a first codebook, the sub-vector W x of each of the first codebooks is composed of a zero vector and a non-zero vector, each vector constituting the W x corresponding to a different set of antenna ports; each of the first codes
- different sub-vectors W x are constructed according to the same or different structures; the same structure is: different sub-vectors W x (l) and W x ( 2 ), in the W x ( 1 ) The position of the non-zero vector is the same as the position of the non-zero vector of W x ( 2 ); the different structure is: different sub-vectors W x (l) and W x ( 2 ), the W x (1) the position of the non-zero vector of the middle is different from the position of the non-zero vector of
- each of the first codebooks includes at least one Have the first knot
- At least one first codebook satisfies the first condition, wherein the first condition is: a vector set consisting of all the first phase vectors and a discrete Fourier transform matrix DFT matrix satisfying a first correspondence: the vector set consisting of the first phase vector is a subset of the phase matrix corresponding column vector set of the DFT matrix, wherein the elements in the Pth row and the Q column of the phase matrix of the DFT matrix are a phase portion of an element in a P row and a Q column in the DFT matrix, wherein, in the first codebook, all V a portions of the first sub-direction constitute a set ⁇ V m ⁇ ,
- the phase portion of each element in each sub-vector of ⁇ V m ⁇ constitutes the first phase vector, and in each sub-vector of the ⁇ V m ⁇ , the phase portion of the K-th element is a corresponding first phase vector
- the Kth element, where P, Q, K are arbitrary positive integers; or a vector set consisting of all second phase vectors and at least one CMP codebook in the Cubic Metric Preserving (CMP) cubic metric hold codebook set satisfies a second corresponding relationship: the vector set consisting of the second phase vector is a subset of the phase matrix corresponding column vector set of the CMP codebook matrix; wherein, the P row and the Q column in the phase matrix of the CMP codebook matrix the element is part of the phase of the Q element in the first column of the row P CMP codebook matrix, wherein the first codebook, first of all the sub-: V a portion of the configuration set ⁇ V m ⁇ ,
- a phase portion of each element in each of the sub-vectors of the ⁇ constitutes the second phase vector, and in each sub-vector of the ⁇ V m ⁇ , a phase portion of the K-th element is a corresponding second phase
- the set is a set of codebook corresponding sub-vectors of the householder transform, wherein, in the first codebook, all V a parts of the first sub-direction constitute a set ⁇ V m ⁇ , and each sub-vector of the ⁇
- each element constitutes the third phase vector
- the phase portion of the ⁇ ⁇ elements is the K-th element of the corresponding third phase vector.
- the second condition is: a vector set consisting of all fourth phase vectors and a discrete Fourier transform matrix DFT matrix satisfying a third correspondence: the vector set consisting of the fourth phase vector is a subset of the phase matrix corresponding column vector set of the DFT matrix, wherein the elements in the Pth row and the Q column of the phase matrix of the DFT matrix are a phase portion of an element in a P row and a Q column in the DFT matrix; wherein, in the first codebook, all V 2 portions of the second sub-direction constitute a set ⁇ V n ⁇ ,
- phase portion of each element in each sub-vector of ⁇ V n ⁇ constitutes the fourth phase vector, and in each sub-vector of the ⁇ V n ⁇ , the phase portion of the K-th element is a corresponding fourth phase vector
- the phase matrix of the matrix corresponds to a subset of the set of column vectors; wherein, the elements in the Pth row and the Q column in the phase matrix of the CMP are the phase portions of the elements in the Pth row and the Q column in the CMP codebook matrix; among them,
- all V b portions of the second sub-direction constitute a set ⁇ V n ⁇ , and a phase portion of each element in each sub-vector of the ⁇ V n ⁇ constitutes the fifth phase vector,
- the phase portion of the Kth element is the Kth element of each corresponding fifth phase vector, where P, Q, K are arbitrary positive integers; or all of the above
- a vector set consisting of six phase vectors is a set of codebook corresponding sub-vectors of a householder transform, wherein, in the first codebook, The phase portion is the corresponding ⁇ th element of each sixth phase vector.
- At least one first codebook satisfies a third condition; wherein the third condition is: at least one first amplitude vector of all first amplitude vectors corresponding to ⁇ Neutralizing all second amplitude vectors corresponding to the ⁇ V n ⁇ ; and/or all second amplitude vectors corresponding to ⁇ V n ⁇ , at least one second amplitude vector and all corresponding to the ⁇ v m ⁇
- the first amplitude vector is different.
- all the first sub-portions form a set
- the amplitude portion of each element in each sub-vector of the ⁇ V m ⁇ constitutes the first amplitude vector
- the phase portion of the K-th element corresponds to Each first magnitude vector
- all second sub-v 2 portions constitute a set ⁇ V n ⁇ , and an amplitude portion of each element in each of the ⁇ constitutes the second
- the amplitude vector, in each sub-vector of the ⁇ V n ⁇ , the amplitude portion of the ⁇ -th element is the K-th element of each corresponding second amplitude vector.
- the at least one first configuration message is received, where each first configuration message is used to determine a subset of the sub-vectors of the phase portion corresponding to the set of antenna ports, the at least one first configuration
- the number of messages is equal to the number of packets of the antenna port; and/or: receiving at least one second configuration message, where each second configuration message is used to determine a set of sub-vectors of amplitude portions corresponding to a group of antenna ports, The number of the at least one second configuration message is equal to the number of packets of the antenna port;
- the first configuration message is that the second network device passes the high layer signaling or the dynamic message.
- the configuration is performed and/or: the second configuration message is configured by the second network device by using high layer signaling or dynamic signaling. Second network device second network device
- the first configuration message is obtained by the first network device by using the reference signal measurement, and/or the second configuration message is that the first network device passes the reference signal Measured obtained.
- the present invention provides different combinations of the first codebook matrices at different RANKs:
- V a part of all the first sub-directions in a codebook constitutes a sub-vector set ⁇ V K ⁇ , each first code
- the v b parts of all the second sub-directions in the present form constitute a sub-vector set ⁇ VL ⁇ , and the ⁇ V K ⁇ and ⁇ VJ corresponding to the first codebook satisfy the fourth condition; wherein the fourth condition is: ⁇ v
- the phase portion of the sub-vector v k of k ⁇ constitutes the vector v k '
- the V k ' corresponding to all V k in ⁇ V k ⁇ constitutes a set ⁇ V k ' ⁇
- ⁇ the phase portion of the sub-vector of VJ constitutes the vector W
- All corresponding constituent sets ⁇ ' ⁇ in VJ and satisfy ⁇ V ⁇ V L , ⁇ .
- a v a part of all first sub-directions in a codebook constitutes a set of sub-vectors ⁇ V M ⁇ , each first code
- the v b part of all the second sub-directions in this part constitutes a sub-vector set ⁇ V N ⁇ , the same first codebook
- the amplitude vector of each first sub-direction in the first codebook has at least two elements that are not equal, and each second sub-word in the first codebook The amplitude vector has at least two elements that are not equal or: each of the first codebooks Water's at least two elements in the amplitude vector in the sub-direction are not equal, the first code
- At least two amplitude vectors are different in the vector set formed by the amplitude vectors of b of all second sub-directions in the first codebook.
- the first network device is a terminal device UE.
- the second network device is a base station in combination with the fourteenth possible implementation manner of the first aspect
- the first codebook set includes at least two first codebooks,
- the sub-vector W x of each first codebook is composed of a zero vector and a non-zero vector, and each vector constituting the W x corresponds to a different set of antenna ports; each of the first codebooks, different children
- the vectors W x are constructed in the same or different structures; the same structure is constructed as follows: different sub-vectors W x (l) and W x (2), the position of the non-zero vector in the W x (1) The positions of the non-zero vectors of W x (2) are the same; the different structures are: different sub-vectors W x (l) and
- each of the first codebooks includes at least one Have the first knot
- At least one first codebook satisfies the first condition, wherein the first condition is: a vector set consisting of all the first phase vectors and a DFT matrix of the discrete Fourier transform matrix satisfying a first correspondence: the vector set consisting of the first phase vector is a subset of the phase matrix corresponding column vector set of the DFT matrix, wherein the elements in the Pth row and the Q column of the phase matrix of the DFT matrix are a phase portion of an element in a P row and a Q column in the DFT matrix, wherein, in the first codebook, all V a portions of the first sub-direction constitute a set ⁇ V m ⁇ ,
- phase portion of each element in each sub-vector of ⁇ V m ⁇ constitutes the first phase vector, and in each sub-vector of the ⁇ V m ⁇ , the phase portion of the K-th element is a corresponding first phase vector a Kth element, where P, Q, K are arbitrary positive integers; or a vector set consisting of all second phase vectors and at least one CMP codebook in the CMP codebook set satisfy a second correspondence:
- the vector set consisting of two phase vectors is a subset of the phase matrix corresponding column vector set of the CMP codebook matrix; wherein, the element in the second row Q column in the phase matrix of the CMP codebook matrix is the CMP codebook phase section of ⁇ element rows and Q columns of matrix, wherein the first codebook, first of all the sub-: configuration set ⁇ V m ⁇ V a portion of said each of ⁇ V m ⁇
- the phase portion of each element in the sub-vector constitutes the second phase vector, and in each sub-vector of the
- At least one first codebook satisfies a second condition, wherein the second condition is: a vector set consisting of all fourth phase vectors and a discrete Fourier transform matrix DFT matrix satisfying a third correspondence: the vector set consisting of the fourth phase vector is a subset of the phase matrix corresponding column vector set of the DFT matrix, wherein the elements in the Pth row and the Q column of the phase matrix of the DFT matrix are a phase portion of an element in a P row and a Q column in the DFT matrix; wherein, in the first codebook, all V 2 portions of the second sub-direction constitute a set ⁇ V n ⁇ ,
- phase portion of each element in each sub-vector of ⁇ V n ⁇ constitutes the fourth phase vector, and in each sub-vector of the ⁇ V n ⁇ , the phase portion of the K-th element is a corresponding fourth phase vector
- the phase matrix of the matrix corresponds to a subset of the set of column vectors; wherein, the elements in the Pth row and the Q column in the phase matrix of the CMP are the phase portions of the elements in the Pth row and the Q column in the CMP codebook matrix; among them,
- all V b portions of the second sub-direction constitute a set ⁇ V n ⁇ , and a phase portion of each element in each sub-vector of the ⁇ V n ⁇ constitutes the fifth phase vector,
- the phase portion of the Kth element is the Kth element of each corresponding fifth phase vector, where P, Q, K are arbitrary positive integers; or all of the above
- a vector set consisting of six phase vectors is a set of codebook corresponding sub-vectors of a househol der transform, wherein, in the first codebook, The phase portion is the corresponding ⁇ th element of each sixth phase vector.
- At least one first codebook satisfies a third condition; wherein the third condition is: at least one first amplitude vector of all first amplitude vectors corresponding to ⁇ Neutralizing all second amplitude vectors corresponding to the ⁇ V n ⁇ ; and/or all second amplitude vectors corresponding to ⁇ V n ⁇ , at least one second amplitude vector and all corresponding to the ⁇ v m ⁇
- the first amplitude vector is different.
- all the first sub-portions form a set
- the amplitude portion of each element in each sub-vector of the ⁇ V m ⁇ constitutes the first amplitude vector
- the phase portion of the K-th element corresponds to Each first magnitude vector
- all second sub-v 2 portions constitute a set ⁇ V n ⁇ , and an amplitude portion of each element in each of the ⁇ constitutes the second
- the amplitude vector, in each sub-vector of the ⁇ V n ⁇ , the amplitude portion of the ⁇ -th element is the K-th element of each corresponding second amplitude vector.
- the network device sends at least a water first configuration message, each first configuration message is used to determine a sub-vector set of a phase portion corresponding to a group of antenna ports, the number of the at least one first configuration message and the grouping of the antenna port And the second network configuration message is sent to the first network device, where each second configuration message is used to determine a set of sub-vectors of the amplitude portion corresponding to the group of antenna ports, the at least one second The number of configuration messages is equal to the number of packets of the antenna port.
- the first configuration message is configured by the second network device by using high layer signaling or dynamic signaling, and/or: the second configuration message is the second network device Configured by high layer signaling or dynamic signaling.
- the reference signal is further used to indicate the first configuration message and/or; the reference signal is further used to indicate the second configuration message.
- the present invention provides different combinations of the first codebook matrices at different RANKs:
- the value of the RI is greater than 1, each water is immersed
- a v a part of all first sub-directions in a codebook constitutes a set of sub-vectors ⁇ V K ⁇ , each first code
- the v b parts of all the second sub-directions in the present form constitute a sub-vector set ⁇ VL ⁇ , and the ⁇ V K ⁇ and ⁇ VJ corresponding to the first codebook satisfy the fourth condition; wherein the fourth condition is: ⁇ v
- the phase portion of the sub-vector v k of k ⁇ constitutes the vector v k '
- the V k ' corresponding to all V k in ⁇ V k ⁇ constitutes a set ⁇ V k ' ⁇
- ⁇ the phase portion of the sub-vector of VJ constitutes the vector W
- All corresponding constituent sets ⁇ ' ⁇ in VJ and satisfy ⁇ V ⁇ V L , ⁇ .
- a v a part of all first sub-directions in a codebook constitutes a set of sub-vectors ⁇ V M ⁇ , each first code
- the v b part of all the second sub-directions in this part constitutes a sub-vector set ⁇ V N ⁇ , the same first codebook
- the amplitude vector of each first sub-direction in the first codebook has at least two elements that are not equal, and each second in the first codebook
- the twelve possible implementation manners the amplitudes of all the first sub-directions in the first codebook are different from at least two amplitude vectors in the vector set of the ceramics; or:
- At least two amplitude vectors are different in the vector set formed by the amplitude vectors of b of all second sub-directions in the first codebook.
- the first network device is a terminal device UE.
- the second network device is a base station eNB in combination with the fourteenth possible implementation of the second aspect.
- a channel information measurement and feedback device is provided: a first receiving unit, configured to receive a reference signal; a measuring unit, configured to measure a reference signal to obtain a measurement result; and a selecting unit, according to the measurement result selecting a first codebook in a first codebook set; said first codebook set comprising at least a first two codebooks, each of the first sub-vector codebook vector w x from zero and nonzero a vector composition, each vector constituting the w x corresponds to a different set of antenna ports; in each of the first codebooks, different sub-vectors W x are configured according to the same or different structures; Yes: different sub-vectors W x (l) and W x (2), where the position of the non-zero vector in W x (1) is the same as the position
- each of the first codebooks includes at least one of the first nodes
- V b in the ⁇ 2 dimensional non-zero direction group antenna port; vector, corresponding to the first group of days
- At least one first codebook satisfies the first condition, wherein the first condition is: a vector set consisting of all the first phase vectors and a discrete Fourier transform matrix DFT matrix satisfying a first correspondence: the vector set consisting of the first phase vector is a subset of the phase matrix corresponding column vector set of the DFT matrix, wherein the elements in the Pth row and the Q column of the phase matrix of the DFT matrix are a phase portion of an element in a P row and a Q column in the DFT matrix, wherein, in the first codebook, all V a portions of the first sub-direction constitute a set ⁇ V m ⁇ ,
- phase portion of each element in each sub-vector of ⁇ V m ⁇ constitutes the first phase vector, and in each sub-vector of the ⁇ V m ⁇ , the phase portion of the K-th element is a corresponding first phase vector a Kth element, where P, Q, K are arbitrary positive integers; or a vector set consisting of all second phase vectors and at least one CMP codebook in the CMP codebook set satisfy a second correspondence:
- the vector set consisting of two phase vectors is a subset of the phase matrix corresponding column vector set of the CMP codebook matrix; wherein, the element in the second row Q column in the phase matrix of the CMP codebook matrix is the CMP codebook phase section of ⁇ element rows and Q columns of matrix, wherein the first codebook, first of all the sub-: configuration set ⁇ V m ⁇ V a portion of said each of ⁇ V m ⁇
- the phase portion of each element in the sub-vector constitutes the second phase vector, and in each sub-vector of the
- At least one first codebook satisfies the second condition, wherein the second condition is: a vector set consisting of all fourth phase vectors and a discrete Fourier transform matrix DFT matrix satisfying a third correspondence: the vector set consisting of the fourth phase vector is a subset of the phase matrix corresponding column vector set of the DFT matrix, wherein the elements in the second row Q column of the phase matrix of the DFT matrix are The phase portion of the element in the third row of the DFT matrix;
- all v b portions of the second sub-direction constitute a set ⁇ V n ⁇
- the phase portion of each element in each sub-vector of ⁇ V n ⁇ constitutes the fourth phase vector, and in each sub-vector of the ⁇ V n ⁇ , the phase portion of the ⁇ -element is the corresponding fourth phase vector
- the phase matrix of the matrix corresponds to a subset of the set of column vectors; wherein, the elements in the Pth row and the Q column in the phase matrix of the CMP are the phase portions of the elements in the Pth row and the Q column in the CMP codebook matrix;
- all V b portions of the second sub-direction constitute a set ⁇ V n ⁇ , each of the ⁇ V n ⁇
- phase portion of each element in the sub-vector constitutes the fifth phase vector
- the phase portion of the K-th element is the K-th element of each corresponding fifth phase vector
- P, Q, and K are arbitrary positive integers
- the vector set of all the sixth phase vectors is a set of codebook corresponding sub-vectors of the householder transform, wherein, in the first codebook,
- All v b portions of the second sub-direction constitute a set ⁇ V n ⁇ , and a phase portion of each element in each sub-vector of the ⁇ V n ⁇ constitutes the sixth phase vector, each sub-vector of the ⁇ v n ⁇
- the phase portion of the ⁇ element is the ⁇ th element of each of the sixth phase vectors.
- At least one first codebook satisfies a third condition; wherein the third condition is: at least one first amplitude vector of all first amplitude vectors corresponding to ⁇ Neutralizing all second amplitude vectors corresponding to the ⁇ V n ⁇ ; and/or all corresponding to ⁇ V n ⁇ In the amplitude vector, at least one second amplitude vector is different from all first amplitude vectors corresponding to the ⁇ v m ⁇ .
- all the first sub-portions form a set
- the amplitude portion of each element in each sub-vector of the ⁇ V m ⁇ constitutes the first amplitude vector
- the phase portion of the K-th element corresponds to Each first magnitude vector
- all second sub-v 2 portions constitute a set ⁇ V n ⁇ , and an amplitude portion of each element in each of the ⁇ constitutes the second
- the amplitude vector, in each sub-vector of the ⁇ V n ⁇ , the amplitude portion of the ⁇ -th element is the K-th element of each corresponding second amplitude vector.
- the second receiving unit is configured to receive at least one first configuration message, where each first configuration message is used to determine a subset of the sub-vectors of the phase portion corresponding to the group of antenna ports, The number of the at least one first configuration message is equal to the number of packets of the antenna port; and/or the receiving unit is configured to receive at least a water flute-set message, where the per-pipe flute configuration message is used to determine one a set of sub-vectors of the amplitude portion corresponding to the group antenna port, the number of the to-pipe flute 21 configuration messages being compared with the number of packets of the antenna port
- the first configuration message is configured by the second network device by using high layer signaling or dynamic signaling, and/or: the second configuration message is the second network device Configured by high layer signaling or dynamic signaling.
- the first obtaining unit is configured to acquire the first configuration message and/or according to the result of the measurement by the measurement unit on the reference signal
- the second acquiring unit is configured to: Obtaining the second configuration message according to a result of the measurement unit measuring the reference signal.
- the present invention provides different combinations of the first codebook matrices at different RANKs:
- each a v a part of all first sub-directions in a codebook constitutes a set of sub-vectors ⁇ V K ⁇ , each first code
- the v b parts of all the second sub-directions in the present form constitute a sub-vector set ⁇ VL ⁇ , and the ⁇ V K ⁇ and ⁇ VJ corresponding to the first codebook satisfy the fourth condition; wherein the fourth condition is: ⁇ v
- the phase portion of the sub-vector v k of k ⁇ constitutes the vector v k '
- the V k ' corresponding to all V k in ⁇ V k ⁇ constitutes a set ⁇ V k ' ⁇
- ⁇ the phase portion of the sub-vector of VJ constitutes the vector W
- All corresponding constituent sets ⁇ ' ⁇ in VJ and satisfy ⁇ V ⁇ V L , ⁇ .
- the v b parts of all the second sub-directions in the present part constitute a sub-vector set ⁇ V N ⁇ , and the ⁇ V M ⁇ and ⁇ corresponding to the same first codebook satisfy the fifth condition; wherein the fifth condition is: amplitude portion ⁇ V M ⁇ of the sub-vector V M in the composition of the vector V, ⁇ V M ⁇ for all V M corresponding to V / composition set ⁇ V / ⁇ , ⁇ subvector v N magnitude components vector ⁇ ⁇ ' , ⁇ V N ⁇ , all ⁇ ⁇ corresponding to ⁇ ⁇ ' constitute a set ⁇ ⁇ ' ⁇ , and satisfy ⁇ V ⁇ V ⁇ .
- the amplitude vector of each first sub-direction in the first codebook has at least two elements that are not equal, and each of the first codebooks
- the amplitude vector of the two sub-directions is at least two elements that are not equal or: at least two elements in the amplitude vector of each water in the first codebook are not equal, the first code All elements in the amplitude vector in each of the second sub-directions are equal, or: all elements in the amplitude vector in each of the first sub-directions in the first codebook are equal, the first
- At least two elements in the amplitude vector in each second sub-direction of the codebook are not in phase
- the twelve possible implementation manners, the amplitudes of all the first sub-directions in the first codebook are different from at least two amplitude vectors in the vector set of the Tao; or
- the first network device is a terminal device UE in combination with the thirteenth possible implementation manner of the third aspect.
- the second network device is a base station eNB.
- the fourth aspect provides a communication device, including: a first sending unit, configured to send a reference signal to the first network device, where the reference signal is used to notify the first network device to perform measurement to obtain a measurement result; For receiving a codebook index sent by the first network device, where the codebook index corresponds to a first codebook determined by the first network device in the first codebook set, where the codebook index is a first network device.
- the first codebook set includes at least two first codes
- the sub-vector I of each first codebook is composed of a zero vector and a non-zero vector, and each vector constituting the W x corresponds to a different group of antenna ports; each of the first codebooks is different.
- each of the first codebooks includes at least one Have the first knot
- At least one first codebook satisfies the first condition, wherein the first condition is: a vector set consisting of all the first phase vectors and a discrete Fourier transform matrix DFT matrix satisfying a first correspondence: the vector set consisting of the first phase vector is a subset of the phase matrix corresponding column vector set of the DFT matrix, wherein the elements in the Pth row and the Q column of the phase matrix of the DFT matrix are a phase portion of an element in a P row and a Q column in the DFT matrix, wherein, in the first codebook, all V a portions of the first sub-direction form a set ⁇ V m ⁇ ,
- phase portion of each element in each sub-vector of ⁇ V m ⁇ constitutes the first phase vector, and in each sub-vector of the ⁇ V m ⁇ , the phase portion of the K-th element is a corresponding first phase vector a Kth element, where P, Q, K are arbitrary positive integers; or a vector set consisting of all second phase vectors and at least one CMP codebook in the CMP codebook set satisfy a second correspondence:
- the vector set consisting of two phase vectors is a subset of the phase matrix corresponding column vector set of the CMP codebook matrix; wherein, the element in the second row Q column in the phase matrix of the CMP codebook matrix is the CMP codebook phase section of ⁇ element rows and Q columns of matrix, wherein the first codebook, first of all the sub-: configuration set ⁇ V m ⁇ V a portion of said each of ⁇ V m ⁇
- the phase portion of each element in the sub-vector constitutes the second phase vector, and in each sub-vector of the
- At least one first codebook satisfies a second condition, wherein the second condition is: a vector set consisting of all fourth phase vectors and a discrete Fourier transform matrix DFT matrix satisfying a third correspondence: the vector set consisting of the fourth phase vector is a subset of the phase matrix corresponding column vector set of the DFT matrix, wherein the elements in the Pth row and the Q column of the phase matrix of the DFT matrix are a phase portion of an element in a Pth row and a Q column in the DFT matrix; wherein, in the first codebook, all v b portions of the second sub-direction constitute a set ⁇ V n ⁇ ,
- phase portion of each element in each sub-vector of ⁇ V n ⁇ constitutes the fourth phase vector, and in each sub-vector of the ⁇ V n ⁇ , the phase portion of the ⁇ -element is the corresponding fourth phase vector
- the phase matrix of the matrix corresponds to a subset of the set of column vectors; wherein, the elements in the Pth row and the Q column in the phase matrix of the CMP are the phase portions of the elements in the Pth row and the Q column in the CMP codebook matrix; among them,
- all V b portions of the second sub-direction constitute a set ⁇ V n ⁇ , and a phase portion of each element in each sub-vector of the ⁇ V n ⁇ constitutes the fifth phase vector,
- the phase portion of the Kth element is the Kth element of each corresponding fifth phase vector, where P, Q, K are arbitrary positive integers; or all of the above
- a vector set consisting of six phase vectors is a set of codebook corresponding sub-vectors of a householder transform, wherein, in the first codebook,
- All v b portions of the second sub-direction constitute a set ⁇ V n ⁇ , and a phase portion of each element in each sub-vector of the ⁇ V n ⁇ constitutes the sixth phase vector, each sub-vector of the ⁇ v n ⁇ Medium, the Kth element
- the phase portion is the corresponding ⁇ th element of each sixth phase vector.
- At least one first codebook satisfies a third condition; wherein the third condition is: at least one first amplitude vector of all first amplitude vectors corresponding to ⁇ Neutralizing all second amplitude vectors corresponding to the ⁇ V n ⁇ ; and/or all second amplitude vectors corresponding to ⁇ V n ⁇ , at least one second amplitude vector and all corresponding to the ⁇ v m ⁇
- the first amplitude vector is different.
- all the first sub-directions the ⁇ part constitute a set
- the amplitude portion of each element in each sub-vector of the ⁇ V m ⁇ constitutes the first amplitude vector
- the phase portion of the K-th element corresponds to Each first magnitude vector
- all second sub-v 2 portions constitute a set ⁇ V n ⁇ , and an amplitude portion of each element in each of the ⁇ constitutes the second
- the amplitude vector, in each sub-vector of the ⁇ V n ⁇ , the amplitude portion of the ⁇ -th element is the K-th element of each corresponding second amplitude vector.
- the method includes: a second sending unit, configured to send, to the first network device, at least one first configuration message, where each first configuration message is used to determine a corresponding one of the antenna ports a set of sub-vectors of the phase portion, the number of the at least one first configuration message being equal to the number of packets of the antenna port; and/or: a third sending unit, configured to send the at least one second configuration message to the first network device Each of the second configuration messages is used to determine a set of sub-vectors of the amplitude portion corresponding to the set of antenna ports, and the number of the at least one second configuration message is equal to the number of packets of the antenna port.
- the second sending unit sends the first configuration message by using high layer signaling or dynamic signaling, and/or: the third sending unit uses high layer signaling or Dynamic signaling is performed to send the second configuration message.
- the reference signal is further used to indicate the at least one first configuration message, where each first configuration message is used to determine a phase portion corresponding to a group of antenna ports a set of subvectors, the number of the at least one first configuration message and the antenna end The number of packets of the port is equal and/or; the reference signal is further used to indicate the at least one second configuration message, where each second configuration message is used to determine a set of sub-vectors of the amplitude portion corresponding to a group of antenna ports, The number of the at least one second configuration message is equal to the number of packets of the antenna port.
- the present invention provides different combinations of the first codebook matrices at different RANKs:
- the v b parts of all the second sub-directions in the present form constitute a sub-vector set ⁇ VL ⁇ , and the ⁇ V K ⁇ and ⁇ VJ corresponding to the first codebook satisfy the fourth condition; wherein the fourth condition is: ⁇ v The phase portion of the sub-vector v k of k ⁇ constitutes the vector v k ' , and the V k ' corresponding to all V k in ⁇ V k ⁇ constitutes a set ⁇ V k ' ⁇ , ⁇ the phase portion of the sub-vector of VJ constitutes the vector W, ⁇ All corresponding constituent sets ⁇ ' ⁇ in VJ, and satisfy ⁇ V ⁇ V L , ⁇ .
- the fourth condition is: ⁇ v The phase portion of the sub-vector v k of k ⁇ constitutes the vector v k ' , and the V k ' corresponding to all V k in ⁇ V k ⁇ constitutes a set ⁇
- Corresponding V M ⁇ and ⁇ satisfies the fifth condition; wherein the fifth condition is: ⁇ amplitude V M V M subvector portion of the composition of the vector V, ⁇ V M ⁇ V M corresponding to all V / composition set ⁇ V / ⁇ , ⁇ subvector v N magnitude components vector ⁇ ⁇ ', ⁇ V N ⁇ for all ⁇ ⁇ corresponding ⁇ ⁇ ' form a set ⁇ ⁇ ' ⁇ , and satisfy ⁇ V ⁇ ⁇ ⁇ V ⁇ .
- the amplitude vector of each first sub-direction in the first codebook has at least two elements that are not equal, and each second sub-word in the first codebook
- the amplitude vector has at least two elements that are not equal or: each of the first codebooks At least two elements in the amplitude vector of the sub-direction are not equal, the first code All elements in the amplitude vector in each second sub-direction i are equal, or: said; all elements in the amplitude vector in each first sub-direction of a codebook are equal, the first -
- At least two elements of the amplitude vector in each second sub-vector of the 0 codebook are out of phase : in combination with the fourth aspect: twelve possible ways to implement all the first sub-directions in the first codebook
- the magnitude of the vector is different from at least two magnitude vectors in the vector set of J Tao Cheng; or:
- the first network device is a terminal device UE.
- the second network device is a base station eNB.
- Figure 1 is an architectural diagram of an antenna port model with a fixed downtilt angle
- FIG. 2 is an architectural diagram of an antenna port model of a dynamic downtilt angle
- FIG. 3 is a schematic diagram of an active antenna system AAS
- Figure 4 is a flow chart of data processing in the baseband and radio frequency network and transmitted through the AAS antenna;
- Figure 5 is a schematic diagram of a downtilt grouping;
- 6 is a flowchart of a method for measuring and feeding back channel information of a first network device according to the present invention
- 7 is a flowchart of a method for measuring and feedback channel information implemented by a second network device according to the present invention
- FIG. 8 is a schematic structural diagram of a network device for implementing a method for measuring and feeding back channel information according to the present invention.
- FIG. 9 is a schematic structural diagram of a network device for implementing a method for measuring and feeding back channel information according to the present invention.
- FIG. 10 is a schematic structural diagram of a network device for implementing a method for measuring and feeding back channel information according to the present invention.
- FIG. 11 is a schematic structural diagram of a network device for implementing a method for measuring and feeding back channel information according to the present invention
- FIG. 12 is a schematic structural diagram of a network device for implementing a method for measuring and feeding back channel information according to the present invention
- FIG. 13 is a schematic structural diagram of a sixth network device for implementing measurement and feedback of channel information according to the present invention.
- FIG. 14 is a schematic structural diagram of a network device for implementing a seventh method for measuring and feeding back channel information according to the present invention.
- FIG. 15 is a schematic structural diagram of an eighth network device for implementing measurement and feedback of channel information according to the present invention.
- 16 is a flow chart of a network system for implementing measurement and feedback methods for channel information according to the present invention.
- Figure ⁇ is a flowchart of a network side device for implementing a method for measuring and feeding channel information provided by the present invention.
- the embodiment of the present invention further provides an apparatus embodiment for implementing the steps and methods in the foregoing method embodiments.
- Tables 1-6 in the present invention are repeated in the specification, and the same numbered tables correspond to the same table contents.
- Figure 6 is a flow chart showing an embodiment of a method of the present invention, specifically:
- Step 101 The first network device receives the reference signal, and measures the reference signal to obtain a measurement result, and selects a first codebook in the first codebook set according to the measurement result;
- the first codebook set includes at least two first codebooks.
- the sub-vectors of each of the first codebooks are composed of a zero vector and a non-zero vector, and each of the vectors constituting the W x corresponds to a different set of antenna ports; each of the first codebooks, different children
- the vectors W x are constructed in the same or different structures; the same structure is constructed: for different sub-vectors W x (l) and W x (2), the position of the non-zero vector in the W x (1) The same as the position of the non-zero vector of W x (2); the different structure is: for different sub-vectors W x (l) and W x (2) , in W x (1) The position of the non-zero vector is different from the position of the non-zero vector of W x (2);
- Step 102 Send a codebook index to the second network device, where the codebook index corresponds to the first codebook selected in the first codebook set.
- the zero vector may be a zero element of length 1
- the non-zero vector may be a non-zero element of length 1.
- the vertical downtilt angle is fixed, so spatially multiplexed multiple data streams can only be adjusted in multiple horizontal beams in a plane with a fixed vertical tilt angle, which does not allow multiple data streams. More free in the plane of the downtilt Row multiplexing.
- the codebook structure provided by the present invention can independently configure the transmission strengths of different groups of antenna ports to achieve improved flexibility and MIM0 performance.
- the parameters of the codebook vector in the codebook can be independently configured according to different tilt angles, so as to achieve flexible adaptation to data transmission efficiency.
- This embodiment takes two tilt angles in the vertical direction as an example (this method is also applicable to more than two tilt angles): in each column in the first codebook, one set of antenna ports corresponds to a non-zero vector; another set of antenna ports Corresponding to the zero vector, or one set of antenna ports corresponds to a zero vector; the other set of antenna ports corresponds to a non-zero vector, where a non-zero vector refers to a vector in which at least one element is a non-zero element, and a zero vector refers to all elements Is a vector of zero elements.
- the per-codebook contains at least one first sub-direction having a first structure: 1
- 0 in the middle represents an nl-dimensional zero vector corresponding to the first set of antenna ports. It should be understood that the present invention is not limited to the case where only two groups can be allocated. In practical applications, a greater number of groups of antenna ports are grouped according to other factors such as different downtilt angles or signal quality.
- the codebook in the first codebook set is traversed to determine a first codebook that best matches the transmission characteristics for channel transmission.
- the structure of the sub-vector of the first codebook may be, but is not limited to, the first structure or the second structure described above.
- the zero vector and the first codebook of the non-zero vector The position of the subvectors can be different.
- the first sub-direction and the second node of the first structure in the case of a 4-antenna port, the first sub-direction and the second node of the first structure;
- the second sub-direction the element in the vector is expressed in quantity
- V where politician° is an element to vl; V is an element in vector V A.
- the first structure may be that the second structure may be
- b is also a further embodiment of the present invention when the antenna ports are grouped into two groups
- a structure may be that the second structure may be
- codebook set includes at least the following four structures
- ⁇ corresponds to the first antenna port; corresponds to the third antenna port; in the second structure, corresponds to the second antenna port; corresponds to the fourth antenna Port; in the third structure, corresponding to the first antenna port; corresponding to the fourth The antenna port; in the fourth structure, corresponding to the second antenna port; corresponding to the third antenna port; wherein 1 is an element of a vector, and ⁇ is an element of a vector.
- the first codebook set includes 0
- the vectors v a , v b , V Corresponding to a group of antenna ports.
- the present invention provides a combination of the first structure and the second structure corresponding to a value indicated by the rank:
- the elements in the non-zero vector contained in the first codebook are usually in the plural form, for a complex
- H « is called the amplitude part is a real number, and ⁇ is called a phase part.
- at least one first codebook satisfies the first condition, and the present invention provides several achievable definitions of the first condition.
- P, Q , K is an arbitrary positive integer:
- the vector set consisting of all the first phase vectors and the discrete Fourier transform matrix DFT matrix satisfy the first correspondence: the vector set consisting of the first phase vectors is a subset of the phase matrix corresponding column vector set of the DFT matrix, The element in the second row Q column of the phase matrix of the DFT matrix is the phase portion of the element in the third row Q column in the DFT matrix, wherein all the first sub-directions in the first codebook
- the V a portion constitutes a set ⁇ V m ⁇ , in each of the sub-vectors of the ⁇
- phase portion of each element constitutes the first phase vector, and in each sub-vector of the ⁇ V m ⁇ , the phase portion of the K-th element is the K-th element of each corresponding first phase vector, where, P , Q, K are arbitrary positive integers;
- the phase matrix of the DFT is a
- the degree is 4, then the order of the phase matrix of the DFT matrix is 4.
- the DFT phase matrix is not necessarily a square matrix, and more rows or columns may be selected according to the order.
- the matrix may be:
- the set of corresponding columns of the phase matrix of the DFT matrix is
- the present invention does not limit the number of rows or columns selected by the DFT matrix. It should be understood that the number of rows should be at least the same as the value of v a , and the number of columns should be at least one codebook, at least The number of one vector is the same.
- the vector set consisting of all the second phase vectors and the at least one CMP codebook in the CMP codebook set satisfy the second correspondence:
- the vector set consisting of the second phase vector is the phase matrix corresponding column vector of the CMP codebook matrix a subset of the set; wherein, the elements in the Pth row and the Q column in the phase matrix of the CMP codebook matrix are phase portions of elements in the Pth row and the Qth column in the CMP codebook matrix, wherein one yard of this, all of the first sub to: configuration set ⁇ V m ⁇ v a part of,
- a phase portion of each element in each of the sub-vectors of the ⁇ constitutes the second phase vector, and in each sub-vector of the ⁇ V m ⁇ , a phase portion of the ⁇ -element is a corresponding second phase
- the CMP codebook with a column vector dimension of 2 is: 1 — ⁇ 1 — 1 0—
- Table 1 The CMP codebook with a column vector dimension of 4 and a layer number of 1 is:
- the column vector dimension is 4, and the CMP codebook with 2 layers is:
- the column vector dimension is 4, and the CMP codebook with 3 layers is:
- the column vector dimension is 4, and the CMP codebook with 4 layers is: Codebook index 4
- the vector set consisting of all the third phase vectors is a subset of the set of the familyer Hausdorfd transform codebook corresponding subvectors, where the expression of the householder transform is:
- the phase portion of each element in each sub-vector constitutes the third phase vector, and in each sub-vector of the ⁇ V m ⁇ , the phase portion of the K-th element is the Kth of each corresponding third phase vector element.
- the third phase vector is: a subset consisting of a matrix corresponding to a different layer number and a phase portion of the codebook index in Table 6. The index corresponds to a different codebook index, and the corresponding integer set is used to indicate different columns in the selection as the third phase vector.
- Table 6 U n is the householder transform corresponding to U n, I is the identity matrix.
- phase vector of the V a is only the first definition of the first condition, the second definition of the first condition, and the third definition of the first condition.
- the illustrated case or relationship may also be a defined codebook of 2 antennas, 4 antennas, and 8 antennas in LTE.
- At least one of the first codebooks satisfies the second condition, and the present invention provides several achievable definitions of the second condition:
- the second condition is the first definition:
- the vector set consisting of all the fourth phase vectors and the discrete Fourier transform matrix DFT matrix satisfy the third correspondence: the vector set consisting of the fourth phase vector is a subset of the phase matrix corresponding column vector set of the DFT matrix,
- the elements in the Pth row and the Q column of the phase matrix of the DFT matrix are the phase portions of the elements in the Pth row and the Q column in the DFT matrix; wherein, in the first codebook, all the second sub directions
- the V b portion constitutes a set ⁇ V n ⁇ , in each of the sub-vectors of the ⁇ V n ⁇
- phase portion of each element constitutes the fourth phase vector, and in each of the sub-vectors of the ⁇ VJ, a phase portion of the K elements is a corresponding ⁇ element of each of the fourth phase vectors;
- Second condition second definition The vector set consisting of all the fifth phase vectors and the at least one CMP codebook in the CMP codebook set satisfy the fourth correspondence: the vector set consisting of the fifth phase vector is the phase matrix corresponding column vector of the CMP codebook matrix a subset of the set; wherein, an element in the Pth row and the Q column in the phase matrix of the CMP is a phase portion of an element in the Pth row and the Qth column in the CMP codebook matrix; wherein the first codebook In the middle, all V b parts of the second sub-direction constitute a set ⁇ V n ⁇ , each of the ⁇ V n ⁇
- phase portion of each element in the sub-vector constitutes the fifth phase vector, and in each sub-vector of the ⁇ V n ⁇ , the phase portion of the K-th element is the K-th element of each corresponding fifth phase vector,
- P, Q, K are arbitrary positive integers;
- the third condition is the third definition:
- the vector set consisting of all the sixth phase vectors is a set of the codebook corresponding sub-vectors of the householder transform, wherein, in the first codebook, all the second sub-part V b parts V
- the present invention does not limit that the value of v b is only the first definition of the second condition, the second definition of the second condition, and the third definition of the second condition.
- the present invention claims to correspond to the second condition: a relationship of a fourth phase vector to a different DFT matrix composed of different parameters, a relationship between a fifth phase vector and a CMP codebook set, and a sixth phase vector The relationship of the codebook of the householder formed by the householder transformation with different original vectors.
- the second codebook may satisfy any one of the second conditions.
- a vector set satisfying the first phase vector is a subset of a phase matrix corresponding column vector set of the DFT matrix; in the second codebook, the fifth phase is satisfied
- a vector set consisting of vectors is a subset of a set of phase matrix corresponding column vectors of the CMP codebook matrix, or What combination.
- At least one first codebook satisfies a third condition: at least one of the first amplitude vectors corresponding to ⁇ and all corresponding second amplitudes The vectors are different; and in all of the second amplitude vectors corresponding to and/or ⁇ v n ⁇ , at least one second amplitude vector is different from all of the first amplitude vectors corresponding to the ⁇ V m ⁇ .
- all v a parts of the first sub-direction constitute a set ⁇ V m ⁇ , each of the ⁇
- the amplitude portion of each element in the vector constitutes the first-amplitude vector, and in each sub-vector of the ⁇ v m ⁇ , the phase portion of the ⁇ -element is the corresponding one; the ⁇ -th element of an amplitude vector;
- the v b portions of all the second sub-directions form a set ⁇ V n ⁇
- the ⁇ V In each subvector of n ⁇ the amplitude portion of the Kth element is the ⁇ th element of each corresponding second amplitude vector.
- the amplitude portion of each element represents a different power corresponding to the antenna port.
- each of the first codebooks includes a sub-vector. The amplitude vector of each set of antenna ports is independently determined.
- the tilt angle can be divided into an electrical tilt angle and a mechanical tilt angle
- the electrical tilt angle is a weighting coefficient of a plurality of arrays corresponding to one antenna port such that Multiple arrays form a beam pointing at an inclination.
- the inclination of the first group of antenna ports is 12 degrees
- the inclination of the second group of antenna ports is 3 degrees, with the horizontal plane being 0 degrees and the downward direction being the positive inclination.
- the first network device receives the energy of the two sets of antenna ports at a certain location, so that the codebook amplitudes of the two sets of antenna ports can be independently controlled, so that the receiving performance is optimal.
- step 101 the acquiring the first codebook set before selecting the first codebook; as an embodiment of the present invention, the first codebook set may be pre-stored in the first In a network device, or sent to the first network device by using the second network device or other device.
- each first configuration message is used to determine a sub-vector set of a phase portion corresponding to a group of antenna ports, the number of the at least one first configuration message and the antenna port The number of packets is equal; and/or receives at least one second configuration message, each of The second configuration message is used to determine a set of sub-vectors of the amplitude portion corresponding to the set of antenna ports, the number of the at least one second configuration message being equal to the number of packets of the antenna port.
- the first configuration message is configured by the second network device by using high layer signaling or dynamic signaling, and/or the second configuration message is performed by the second network device by using high layer signaling or dynamic signaling. Configured.
- the first configuration message is obtained by the first network device by measuring the reference signal and/or the second configuration message is obtained by the first network device by measuring the reference signal.
- the present invention provides a case where a codebook set having the first structure and the second structure may exist.
- a codebook set having the first structure and the second structure may exist.
- the first codebook claimed by the present invention may be, but is not limited to, The following structure:
- the first first codebook is one of the following matrices:
- the second first codebook is one of the following matrices:
- the value is 2, and (Xi N 0 ⁇ i, 0 ⁇ j ⁇ N!, 0 ⁇ j, or:
- the third first codebook is one of the following matrices:
- the third first codebook is one of the following matrices: v a d) KU) v a ⁇ i) V a ii) KU) o - — KU) 0 V a ( k)
- the five first codebooks are one of the following matrices:
- V b (V) 0 0 0 jobs — 0 0 jobs —
- the sixth first codebook is one of the following matrices:
- the seventh first codebook is one of the following matrices:
- Eight first codebooks are one of the following matrices
- V b 0 3 ⁇ 4 (2) 0 0 0 0 0 ⁇ ('') 0 0 0 0 0 0
- rank indicator has a value of 8
- the V a part under the parameters i, j, k, 1, m, n, p, q, etc. corresponds to each sub-vector, and the two sub-vectors are different; i', j', k', ⁇ , m', n', p
- the sub-vectors corresponding to the V b portion under parameters such as ', q' are unequal.
- the V b part constitutes a sub-vector set ⁇ VJ, ⁇ V K ⁇ and ⁇ VJ corresponding to the same first codebook satisfy the fourth condition; wherein the fourth condition is:
- phase portion of the sub-vector V k of ⁇ V k ⁇ constitutes the vector V k '
- the v k ' corresponding to all v k in ⁇ V k ⁇ constitutes a set ⁇ V k ' ⁇
- ⁇ the phase portion of the sub-vector of the VJ constitutes a vector W
- ⁇ VJ all corresponding component sets ⁇ VL' ⁇
- the first codebook satisfying the relationship of ⁇ v k ' ⁇ ⁇ ⁇ V L ' ⁇ and/or ⁇ ⁇ ' ⁇ ⁇ ⁇ ⁇ ' ⁇ realizes flexibility of the first structure and the second structure.
- the configuration improves the matching degree of the codebook to the channel ( hereinafter, the relationship of the respective amplitude vectors is given. Among them, the amplitude vector
- the first relationship, the second relationship of the amplitude vector, and the third relationship of the amplitude vector respectively give a configuration manner of the relationship between the contained elements and the elements in each sub-vector; wherein, the third relationship of the amplitude vector, the amplitude vector
- the fourth relationship gives the relationship of different codebook vectors in a codebook.
- the second network device can configure different amplitude vectors according to channel conditions to make the transmission efficiency higher.
- the definition of the amplitude vector has been described, and will not be described here:
- a codebook ⁇ 2 in a codebook set is:
- the amplitude vector of each first sub-direction in the first codebook has at least two elements. Equal, and the amplitude vector of each second sub-direction in the first codebook has at least two elements that are not equal;
- At least two values are not equal; at least two of b 2 , b 3 , and b 4 are not equal; at least two of c 2 , c 3 , and c 4 are not equal; ⁇ (1 2; and gl ⁇ g 2 .
- At least two of the vectors are different
- the fifth relationship of the amplitude vector at least two amplitude vectors in the vector set formed by the amplitude vectors of all the second sub-directions in the first codebook are different.
- the amplitude of the vector refers to a vector magnitude portion made: the configuration of the amplitude portion; wherein the present invention, the magnitude of the vector in a ⁇ fingers.
- a vector magnitude portion made: the configuration of the amplitude portion; wherein the present invention, the magnitude of the vector in a ⁇ fingers.
- Figure 7 shows a flow chart of an embodiment of a method of the present invention. specific:
- Step 201 Send a reference signal to the first network device, where the reference signal is used by the first network device to perform measurement to obtain a measurement result.
- Step 202 Receive a codebook index sent by the first network device, where the codebook index corresponds to a first codebook determined by the first network device in the first codebook set, where the codebook index is first The network device is determined based on the measurement result.
- Step 203 Determine, according to the codebook index, a first codebook determined by the first network device in the first codebook set.
- the first codebook set includes at least two first codebooks.
- Each of the first codebooks The sub-vectors ⁇ are composed of a zero vector and a non-zero vector, each vector constituting the w x corresponding to a different set of antenna ports; in each of the first codebooks, different sub-vectors w x are the same or different
- the structure is constructed according to the same structure: for different sub-vectors W x (l) and W x ( 2 ), the position of the non-zero vector in the W x ( 1 ) and the W x ( 2 ) The positions of the non-zero vectors are the same; the different structures are: for different sub-vectors W x (l) and W x ( 2 ), the position of the non-zero vector in the W x ( 1 ) The position of the non-zero vector of W x ( 2 ) is different;
- the zero vector may be a zero element of length 1
- the non-zero vector may be a non-zero element of length 1.
- the vertical downtilt angle is fixed, so spatially multiplexed multiple data streams can only be adjusted in multiple horizontal beams in a plane with a fixed vertical tilt angle, which does not allow multiple data streams.
- the planes of the downtilt are more freely multiplexed.
- the code structure provided by the present invention can independently configure the transmission strengths of different groups of antenna ports to improve the flexibility and the performance of MIM0.
- the parameters of the codebook vector in the codebook can be independently configured according to different tilt angles, so as to achieve flexible adaptation to data transmission efficiency.
- This embodiment takes two tilt angles in the vertical direction as an example (this method is also applicable to more than two tilt angles): in each column in the first codebook, one set of antenna ports corresponds to a non-zero vector; another set of antenna ports Corresponding to the zero vector, or one set of antenna ports corresponds to a zero vector; the other set of antenna ports corresponds to a non-zero vector, where a non-zero vector refers to a vector in which at least one element is a non-zero element, and a zero vector refers to all elements Is a vector of zero elements.
- n1 element of a vector included in one codebook corresponds to a group of antenna ports
- the structure of the vector is, where the dimension of VI is nl, the dimension of V2 Is n2
- each of the first codebooks includes at least one first sub-direction having a first structure: ⁇ is 1 1 a dimension non-zero vector corresponding to the first set of antenna ports; 0 in the middle represents an n2 dimensional zero vector, corresponding to the
- the present invention is not limited to the case where only two groups can be allocated. In practical applications, a greater number of groups of antenna ports are grouped according to other factors such as different downtilt angles or signal quality.
- the codebook in the first codebook set is traversed to determine a first codebook that best matches the transmission characteristics for channel transmission.
- the structure of the sub-vector of the first codebook may be, but is not limited to, the first structure or the second structure described above.
- the locations of the sub-vectors of the first codebook of the zero vector and the non-zero vector may be different.
- a 4-antenna port in the case of a 4-antenna port,
- the second sub-direction represents the elements in the vector, whereiller°, is in the vector
- the element of v; v is the element in vector 1 ⁇ 4.
- the first structure may be that the second structure may be
- the structure may be that the second structure may be:
- codebook set includes at least the following four structures
- the corresponding relationship is as follows: In the first structure, corresponding to the first antenna port; corresponding to the third antenna port; in the second structure, ° corresponds to the second antenna port; corresponding to the fourth antenna In the third structure, corresponding to the first antenna port; corresponding to the fourth antenna port; in the fourth structure, corresponding to the second antenna port; corresponding to the third antenna port; wherein the sum is a vector element, ⁇ and ⁇ 1 is an element of a vector.
- the first codebook set includes 0
- the vectors v a , v b , V Corresponding to a group of antenna ports.
- the present invention provides a combination of the first structure and the second structure corresponding to a value indicated by the rank:
- the elements in the non-zero vector contained in the first codebook are usually in the plural form, for a complex part called the real part, and ⁇ is called the phase part.
- at least one first codebook satisfies the first condition, and the present invention provides several achievable definitions of the first condition.
- P, Q , K is an arbitrary positive integer:
- the vector set consisting of all the first phase vectors and the discrete Fourier transform matrix DFT matrix satisfy the first correspondence: the vector set consisting of the first phase vectors is a subset of the phase matrix corresponding column vector set of the DFT matrix, The element in the Pth row and the Q column of the phase matrix of the DFT matrix is a phase portion of an element in the Pth row and the Q column in the DFT matrix, wherein, in the first codebook, all the first subdirections
- the V a portion constitutes a set ⁇ V m ⁇ , in each of the sub-vectors of the ⁇
- phase portion of each element constitutes the first phase vector, and in each sub-vector of the ⁇ V m ⁇ , the phase portion of the K-th element is the K-th element of each corresponding first phase vector, where, P , Q, K are arbitrary positive integers;
- the phase matrix of the DFT is a
- the degree is 4, then the order of the phase matrix of the DFT matrix is 4.
- the DFT phase matrix is not necessarily a square matrix, and more rows or columns may be selected according to the order.
- the matrix may be:
- the set of corresponding columns of the phase matrix of the DFT matrix is
- the present invention does not limit the number of rows or columns selected by the DFT matrix. It should be understood that the number of rows should be at least the same as the value of V a , and the number of columns should be at least one codebook, at least The number of one vector is the same.
- the vector set consisting of all the second phase vectors and the at least one CMP codebook in the CMP codebook set satisfy the second correspondence:
- the vector set consisting of the second phase vector is the phase matrix corresponding column vector of the CMP codebook matrix a subset of the set; wherein, the elements in the Pth row and the Q column in the phase matrix of the CMP codebook matrix are phase portions of elements in the Pth row and the Qth column in the CMP codebook matrix, wherein
- all V a parts of the first sub-direction constitute a set ⁇ V m ⁇ ,
- a phase portion of each element in each of the sub-vectors of the ⁇ constitutes the second phase vector, and in each sub-vector of the ⁇ V m ⁇ , a phase portion of the K-th element is a corresponding second phase
- the Kth element of the vector where P, Q, and K are arbitrary positive integers, and the CMP codebook refers to a codebook in which only one layer of each layer corresponding to each port is a non-zero element; In all CMP codebooks, the CMP codebook with a column vector dimension of 2 is
- the column vector dimension is 4, and the CMP codebook with layer number 1 is:
- the column vector dimension is 4, and the CMP codebook with 2 layers is:
- the column vector dimension is 4, and the CMP codebook with 3 layers is:
- the column vector dimension is 4, and the CMP codebook with 4 layers is: Codebook index 4
- the vector set consisting of all the third phase vectors is a subset of the set of the familyer Hausdorfd transform codebook corresponding subvectors, where the expression of the householder transform is:
- the phase portion of each element in each sub-vector constitutes the third phase vector, and in each sub-vector of the ⁇ V m ⁇ , the phase portion of the K-th element is the Kth of each corresponding third phase vector element.
- the third phase vector is: a subset consisting of a matrix corresponding to a different layer number and a phase portion of the codebook index in Table 6. The index corresponds to a different codebook index, and the corresponding integer set is used to indicate different columns in the selection as the third phase vector.
- Table 6 U n is the householder transform corresponding to U n, I is the identity matrix.
- the present invention does not limit that the value of the ⁇ is only the first definition of the first condition, the second definition of the first condition, and the third definition of the first condition.
- the case or relationship may also be a defined codebook of 2 antennas, 4 antennas, and 8 antennas in LTE.
- At least one of the first codebooks satisfies the second condition, and the present invention provides several achievable definitions of the second condition:
- the second condition is the first definition:
- the vector set consisting of all the fourth phase vectors and the discrete Fourier transform matrix DFT matrix satisfy the third correspondence: the vector set consisting of the fourth phase vector is a subset of the phase matrix corresponding column vector set of the DFT matrix,
- the elements in the Pth row and the Q column of the phase matrix of the DFT matrix are the phase portions of the elements in the Pth row and the Q column in the DFT matrix; wherein, in the first codebook, all the second sub directions
- the V b portion constitutes a set ⁇ V n ⁇ , in each of the sub-vectors of the ⁇ V n ⁇
- phase portion of each element constitutes the fourth phase vector, and in each of the sub-vectors of the ⁇ VJ, a phase portion of the K elements is a corresponding ⁇ element of each of the fourth phase vectors;
- Second condition second definition The vector set consisting of all the fifth phase vectors and the at least one CMP codebook in the CMP codebook set satisfy the fourth correspondence: the vector set consisting of the fifth phase vector is the phase matrix corresponding column vector of the CMP codebook matrix a subset of the set; wherein, an element in the Pth row and the Q column in the phase matrix of the CMP is a phase portion of an element in the Pth row and the Qth column in the CMP codebook matrix; wherein the first codebook In the middle, all V b parts of the second sub-direction constitute a set ⁇ V n ⁇ , each of the ⁇ V n ⁇
- phase portion of each element in the sub-vector constitutes the fifth phase vector, and in each sub-vector of the ⁇ V n ⁇ , the phase portion of the K-th element is the K-th element of each corresponding fifth phase vector,
- P, Q, K are arbitrary positive integers;
- the third condition is the third definition:
- the vector set consisting of all the sixth phase vectors is a set of the codebook corresponding sub-vectors of the householder transform, wherein, in the first codebook, all the second sub-part V b parts V
- the present invention does not limit that the value of v b is only the first definition of the second condition, the second definition of the second condition, and the third definition of the second condition.
- the present invention claims to correspond to the second condition: a relationship of a fourth phase vector to a different DFT matrix composed of different parameters, a relationship between a fifth phase vector and a CMP codebook set, and a sixth phase vector The relationship of the codebook of the householder formed by the householder transformation with different original vectors.
- the second codebook may satisfy any one of the second conditions.
- a vector set satisfying the first phase vector is a subset of a phase matrix corresponding column vector set of the DFT matrix; in the second codebook, the fifth phase is satisfied
- a vector set consisting of vectors is a subset of a set of phase matrix corresponding column vectors of the CMP codebook matrix, or What combination.
- At least one first codebook satisfies a third condition: at least one of the first amplitude vectors corresponding to ⁇ and all corresponding second amplitudes The vectors are different; and in all of the second amplitude vectors corresponding to and/or ⁇ v n ⁇ , at least one second amplitude vector is different from all of the first amplitude vectors corresponding to the ⁇ V m ⁇ .
- all v a parts of the first sub-direction constitute a set ⁇ V m ⁇ , each of the ⁇
- the amplitude portion of each element in the vector constitutes the first-amplitude vector, and in each sub-vector of the ⁇ v m ⁇ , the phase portion of the ⁇ -element is the corresponding one; the ⁇ -th element of an amplitude vector;
- the v b portions of all the second sub-directions form a set ⁇ V n ⁇
- the ⁇ V In each subvector of n ⁇ the amplitude portion of the Kth element is the ⁇ th element of each corresponding second amplitude vector.
- the amplitude portion of each element represents a different power corresponding to the antenna port.
- each of the first codebooks includes a sub-vector. The amplitude vector of each set of antenna ports is independently determined.
- the tilt angle can be divided into an electrical tilt angle and a mechanical tilt angle
- the electrical tilt angle is a weighting coefficient of a plurality of arrays corresponding to one antenna port such that Multiple arrays form a beam pointing at an inclination.
- the inclination of the first group of antenna ports is 12 degrees
- the inclination of the second group of antenna ports is 3 degrees, with the horizontal plane being 0 degrees and the downward direction being the positive inclination.
- the first network device receives the energy of the two sets of antenna ports at a certain location, so that the codebook amplitudes of the two sets of antenna ports can be independently controlled, so that the receiving performance is optimal.
- the first codebook set is obtained before the selecting a first codebook.
- the first codebook set may be pre-stored in a first network.
- the device is delivered to the first network device by the second network device or other device.
- each first configuration message is used to determine a set of sub-vectors of a phase portion corresponding to a group of antenna ports, and the quantity of the at least one first configuration message is The number of packets of the antenna port is equal; and/or:
- the reference signal is further used to indicate the first configuration message and/or; the reference signal is further used to indicate the second configuration message, so that the first network device acquires the first according to the reference signal The configuration message and/or the second configuration message.
- the first configuration message is configured by the second network device by using high layer signaling or dynamic signaling
- the second configuration message is performed by the second network device by using high layer signaling or dynamic signaling. Configured.
- the first configuration message is received and/or the second configuration message is received, where the first configuration message is obtained by the first network device by measuring the reference signal and/or the second configuration.
- the message is obtained by the first network device by measuring the reference signal.
- the present invention provides a case where a codebook set having the first structure and the second structure may exist.
- a codebook set having the first structure and the second structure may exist.
- the first codebook claimed by the present invention may be, but is not limited to, The following structure:
- the first first codebook is one of the following matrices:
- the second first codebook is one of the following matrices: where the rank indicates
- the third first codebook is one of the following matrices:
- the third first codebook is one of the following matrices:
- the first five codebooks are one of the following matrices:
- V b (V) 0 0 0 0 0 0 0 0 0 0 0
- V b (V) 0 jobs 0 0 0 jobs 0 V b
- rank refers to
- the value shown is 5 and (Xi N 0 ⁇ i, 0 0 ⁇ m, N or:
- the sixth first codebook is one of the following matrices:
- the seventh first codebook is one of the following matrices:
- Eight first codebooks are one of the following matrices
- V b 0 3 ⁇ 4 (2) 0 0 0 0 0 ⁇ ('') 0 0 0 0 0 0
- rank indicator has a value of 8
- the V a part under the parameters i, j, k, 1, m, n, p, q, etc. corresponds to each sub-vector, and the two sub-vectors are different; i', j', k', ⁇ , m', n', p
- the sub-vectors corresponding to the V b portion under parameters such as ', q' are unequal.
- the V b part constitutes a sub-vector set ⁇ VJ, ⁇ V K ⁇ and ⁇ VJ corresponding to the same first codebook satisfy the fourth condition; wherein the fourth condition is:
- phase portion of the sub-vector V k of ⁇ V k ⁇ constitutes the vector V k '
- the v k ' corresponding to all v k in ⁇ V k ⁇ constitutes a set ⁇ V k ' ⁇
- ⁇ the phase portion of the sub-vector of the VJ constitutes a vector W
- ⁇ VJ all corresponding component sets ⁇ VL' ⁇
- the first codebook satisfying the relationship of ⁇ v k ' ⁇ ⁇ ⁇ V L ' ⁇ and/or ⁇ ⁇ ' ⁇ ⁇ ⁇ ⁇ ' ⁇ realizes flexibility of the first structure and the second structure.
- the configuration improves the matching degree of the codebook to the channel ( hereinafter, the relationship of the respective amplitude vectors is given. Among them, the amplitude vector
- the first relationship, the second relationship of the amplitude vector, and the third relationship of the amplitude vector respectively give a configuration manner of the relationship between the contained elements and the elements in each sub-vector; wherein, the third relationship of the amplitude vector, the amplitude vector
- the fourth relationship gives the relationship of different codebook vectors in a codebook.
- the second network device can configure different amplitude vectors according to channel conditions to make the transmission efficiency higher.
- the definition of the amplitude vector has been described, and will not be described here:
- a codebook ⁇ 2 in a codebook set is:
- the amplitude vector of each first sub-direction in the first codebook has at least two elements. Equal, and the amplitude vector of each second sub-direction in the first codebook has at least two elements that are not equal;
- At least two values are not equal; at least two of b 2 , b 3 , and b 4 are not equal; at least two of c 2 , c 3 , and c 4 are not equal; ⁇ (1 2; and gl ⁇ g 2 .
- At least two of the vectors are different
- the fifth relationship of the amplitude vector at least two amplitude vectors in the vector set formed by the amplitude vectors of all the second sub-directions in the first codebook are different.
- FIG. 8 shows a first network side device embodiment of the present invention, including:
- a first receiving unit 301 configured to receive a reference signal
- a measuring unit 302 configured to measure a reference signal to obtain a measurement result
- the selecting unit 303 is configured to select a first codebook in the first codebook set according to the measurement result; the first codebook set includes at least two first codebooks, and each of the first codebooks
- the vector W x is composed of a zero vector and a non-zero vector, each vector constituting the W x corresponding to a different set of antenna ports; in each of the first codebooks, different sub-vectors W x are in the same or different structures
- the composition is the same structure: different sub-vectors W x (l) and W x ( 2 ), the position of the non-zero vector in the W x ( 1 ) and the non-zero of the W x ( 2 )
- the positions of the zero directions are the same;
- the different structures are: different sub-vectors W x ( l) and W x ( 2 ) the position of the non-zero vector in W x ( 1 ) and the W x ( 2
- the position of the non-zero vector is different;
- the sending unit 304 is configured to send the codebook index to the second network device, where the codebook index corresponds to the first codebook selected in the first codebook set.
- the codebook index is used to indicate a first codebook used by the second network device in the encoding and/or decoding process.
- the zero vector may be a zero element of length 1
- the non-zero vector may be a non-zero element of length 1.
- the vertical downtilt angle is fixed, so spatially multiplexed multiple data streams can only be adjusted in multiple horizontal beams in a plane with a fixed vertical tilt angle, which does not allow multiple data streams.
- the planes of the downtilt are more freely multiplexed.
- the code structure provided by the present invention can independently configure the transmission strengths of different groups of antenna ports to improve the flexibility and the performance of MIM0.
- the parameters of the codebook vector in the codebook can be independently configured according to different tilt angles, so as to achieve flexible adaptation to data transmission efficiency.
- This embodiment takes two tilt angles in the vertical direction as an example (this method is also applicable to more than two tilt angles): in each column in the first codebook, one set of antenna ports corresponds to a non-zero vector; another set of antenna ports Corresponding to the zero vector, or one set of antenna ports corresponds to a zero vector; the other set of antenna ports corresponds to a non-zero vector, where a non-zero vector refers to a vector in which at least one element is a non-zero element, and a zero vector refers to all elements Is a vector of zero elements.
- the structure of the vector is, where the dimension of VI is nl, the dimension of V2 Is n2 (
- the per S water '-codebook contains at least one first sub-direction having a first structure: ⁇ is a quantity of 1 1 , corresponding to the
- the present invention is not limited to the case where only two groups can be allocated. In practical applications, a greater number of groups of antenna ports are grouped according to other factors such as different downtilt angles or signal quality.
- the codebook in the first codebook set is traversed to determine a first codebook that best matches the transmission characteristics for channel transmission.
- the structure of the sub-vector of the first codebook may be, but is not limited to, the first structure or the second structure described above.
- the locations of the sub-vectors of the first codebook of the zero vector and the non-zero vector may be different.
- a 4-antenna port in the case of a 4-antenna port,
- the second sub-direction The element in the vector is represented, where username°, is the vector v h V:
- the element of v; V is the element in vector V A .
- the first structure may be that the second structure may be
- b is also a further embodiment of the present invention when the antenna ports are grouped into two groups
- a structure may be that the second structure may be:
- the codebook set contains at least the following four structures
- ⁇ corresponds to the first antenna port; corresponds to the third antenna port; in the second structure, corresponds to the second antenna port; corresponds to the fourth antenna
- ⁇ corresponds to the first antenna port; corresponding to the fourth antenna port; in the fourth structure, ° corresponds to the second antenna port; corresponding to the third antenna port; wherein the sum is an element of the vector, ⁇ and Is an element of a vector.
- the first codebook set includes 0
- the vectors v a , v b , V Corresponding to a group of antenna ports.
- the present invention provides a combination of the first structure and the second structure corresponding to a value indicated by the rank:
- the elements in the non-zero vector contained in the first codebook are usually in the plural form, for a complex
- H « is called the amplitude part is a real number, called the phase part.
- at least one first codebook satisfies the first condition, and the present invention provides several achievable definitions of the first condition.
- P, Q , K is an arbitrary positive integer:
- the vector set consisting of all the first phase vectors and the discrete Fourier transform matrix DFT matrix satisfy the first correspondence: the vector set consisting of the first phase vectors is a subset of the phase matrix corresponding column vector set of the DFT matrix, The element in the second row Q column of the phase matrix of the DFT matrix is the phase portion of the element in the third row Q column in the DFT matrix, wherein all the first sub-directions in the first codebook
- the V a portion constitutes a set ⁇ V m ⁇ , in each of the sub-vectors of the ⁇
- phase portion of each element constitutes the first phase vector, and in each sub-vector of the ⁇ V m ⁇ , the phase portion of the K-th element is the K-th element of each corresponding first phase vector, where, P , Q, K are arbitrary positive integers;
- the phase matrix of the DFT is a
- the degree is 4, then the order of the phase matrix of the DFT matrix is 4.
- the DFT phase matrix is not necessarily a square matrix, and more rows or columns may be selected according to the order.
- the matrix may be:
- the set of corresponding columns of the phase matrix of the DFT matrix is
- the present invention does not limit the number of rows or columns selected by the DFT matrix. It should be understood that the number of rows should be at least the same as the value of v a , and the number of columns should be at least one codebook, at least The number of one vector is the same.
- the vector set consisting of all the second phase vectors and the at least one CMP codebook in the CMP codebook set satisfy the second correspondence:
- the vector set consisting of the second phase vector is the phase matrix corresponding column vector of the CMP codebook matrix a subset of the set; wherein, the elements in the Pth row and the Q column in the phase matrix of the CMP codebook matrix are phase portions of elements in the Pth row and the Qth column in the CMP codebook matrix, wherein one yard of this, all of the first sub to: configuration set ⁇ V m ⁇ v a part of,
- a phase portion of each element in each of the sub-vectors of the ⁇ constitutes the second phase vector, and in each sub-vector of the ⁇ V m ⁇ , a phase portion of the ⁇ -element is a corresponding second phase
- the CMP codebook with a column vector dimension of 2 is: 1 — ⁇ 1 — 1 0—
- Table 1 The CMP codebook with a column vector dimension of 4 and a layer number of 1 is:
- the column vector dimension is 4, and the CMP codebook with 2 layers is:
- the column vector dimension is 4, and the CMP codebook with 3 layers is:
- the column vector dimension is 4, and the CMP codebook with 4 layers is: Codebook index 4
- the vector set consisting of all the third phase vectors is a subset of the set of the familyer Hausdorfd transform codebook corresponding subvectors, where the expression of the householder transform is:
- the phase portion of each element in each sub-vector constitutes the third phase vector, and in each sub-vector of the ⁇ V m ⁇ , the phase portion of the K-th element is the Kth of each corresponding third phase vector element.
- the third phase vector is: a subset consisting of a matrix corresponding to a different layer number and a phase portion of the codebook index in Table 6. The index corresponds to a different codebook index, and the corresponding integer set is used to indicate different columns in the selection as the third phase vector.
- Table 6 U n is the householder transform corresponding to U n, I is the identity matrix.
- the present invention does not limit that the value of the ⁇ is only the first definition of the first condition, the second definition of the first condition, and the third definition of the first condition.
- the case or relationship may also be a defined codebook of 2 antennas, 4 antennas, and 8 antennas in LTE.
- At least one of the first codebooks satisfies the second condition, and the present invention provides several achievable definitions of the second condition:
- the second condition is the first definition:
- the vector set consisting of all the fourth phase vectors and the discrete Fourier transform matrix DFT matrix satisfy the third correspondence: the vector set consisting of the fourth phase vector is a subset of the phase matrix corresponding column vector set of the DFT matrix,
- the elements in the Pth row and the Q column of the phase matrix of the DFT matrix are the phase portions of the elements in the Pth row and the Q column in the DFT matrix; wherein, in the first codebook, all the second sub directions
- the V b portion constitutes a set ⁇ V n ⁇ , in each of the sub-vectors of the ⁇ V n ⁇
- phase portion of each element constitutes the fourth phase vector, and in each of the sub-vectors of the ⁇ VJ, a phase portion of the K elements is a corresponding ⁇ element of each of the fourth phase vectors;
- Second condition second definition The vector set consisting of all the fifth phase vectors and the at least one CMP codebook in the CMP codebook set satisfy the fourth correspondence: the vector set consisting of the fifth phase vector is the phase matrix corresponding column vector of the CMP codebook matrix a subset of the set; wherein, an element in the Pth row and the Q column in the phase matrix of the CMP is a phase portion of an element in the Pth row and the Qth column in the CMP codebook matrix; wherein the first codebook In the middle, all V b parts of the second sub-direction constitute a set ⁇ V n ⁇ , each of the ⁇ V n ⁇
- phase portion of each element in the sub-vector constitutes the fifth phase vector, and in each sub-vector of the ⁇ V n ⁇ , the phase portion of the K-th element is the K-th element of each corresponding fifth phase vector,
- P, Q, K are arbitrary positive integers;
- the third condition is the third definition:
- the vector set consisting of all the sixth phase vectors is a set of the codebook corresponding sub-vectors of the householder transform, wherein, in the first codebook, all the second sub-part V b parts V
- the present invention does not limit that the value of v b is only the first definition of the second condition, the second definition of the second condition, and the third definition of the second condition.
- the present invention claims to correspond to the second condition: a relationship of a fourth phase vector to a different DFT matrix composed of different parameters, a relationship between a fifth phase vector and a CMP codebook set, and a sixth phase vector The relationship of the codebook of the householder formed by the householder transformation with different original vectors.
- the second codebook may satisfy any one of the second conditions.
- a vector set satisfying the first phase vector is a subset of a phase matrix corresponding column vector set of the DFT matrix; in the second codebook, the fifth phase is satisfied
- a vector set consisting of vectors is a subset of a set of phase matrix corresponding column vectors of the CMP codebook matrix, or What combination.
- at least one first codebook satisfies the third condition:
- At least one of the first amplitude vectors is different from all of the corresponding second amplitude vectors; and/or all of the second amplitude vectors corresponding to ⁇ V n ⁇ have at least A second amplitude vector is different from all first amplitude vectors corresponding to the ⁇ V m ⁇ .
- all V a parts of the first sub-direction constitute a set ⁇ V m ⁇ , each of the ⁇
- the amplitude portion of each element in the vector constitutes the first-amplitude vector, and in each sub-vector of the ⁇ V m ⁇ , the phase portion of the K-th element is a corresponding one; the K-th element of an amplitude vector;
- the v b portions of all the second sub-directions form a set ⁇ V n ⁇
- the ⁇ V In each subvector of n ⁇ the amplitude portion of the Kth element is the ⁇ th element of each corresponding second amplitude vector.
- the amplitude portion of each element represents a different power corresponding to the antenna port.
- each of the first codebooks includes a sub-vector. The amplitude vector of each set of antenna ports is independently determined.
- the tilt angle can be divided into an electrical tilt angle and a mechanical tilt angle
- the electrical tilt angle is a weighting coefficient of a plurality of arrays corresponding to one antenna port such that Multiple arrays form a beam pointing at an inclination.
- the inclination of the first group of antenna ports is 12 degrees
- the inclination of the second group of antenna ports is 3 degrees, with the horizontal plane being 0 degrees and the downward direction being the positive inclination.
- the first network device receives the energy of the two sets of antenna ports at a certain location, so that the codebook amplitudes of the two sets of antenna ports can be independently controlled, so that the receiving performance is optimal.
- FIG. 9 further shows a third obtaining unit 305, configured to acquire the first codebook set before the selecting a first codebook; as a further implementation of the present invention
- the memory 306 is configured to store the first codebook set in the first network device in advance, and send the same to the first network device by using the sending unit 304 or other device.
- FIG. 11 further shows a second receiving unit 307, configured to receive at least one first configuration message, where each first configuration message is used to determine a sub-phase portion corresponding to a group of antenna ports.
- a third receiving unit 308, configured to receive at least one second configuration message, each of the second configuration messages, And a set of sub-vectors for determining an amplitude portion corresponding to a group of antenna ports, the number of the at least one second configuration message being equal to the number of packets of the antenna port.
- the first configuration message is configured by the second network device by using high layer signaling or dynamic signaling, and/or the second configuration message is performed by the second network device by using high layer signaling or dynamic signaling. Configured.
- the first configuration message is obtained by the first network device by measuring the reference signal and/or the second configuration message is obtained by the first network device by measuring the reference signal.
- the present invention provides a case where a codebook set having the first structure and the second structure may exist.
- a codebook set having the first structure and the second structure may exist.
- the first codebook claimed by the present invention may be, but is not limited to, The following structure:
- the first first codebook is one of the following matrices:
- the second first codebook is one of the following matrices: where the rank indicates
- the third first codebook is one of the following matrices:
- the third first codebook is one of the following matrices:
- the first five codebooks are one of the following matrices:
- V b (V) 0 0 0 0 0 0 0 0 0 0 0
- V b (V) 0 jobs 0 0 0 jobs 0 V b
- rank refers to
- the value shown is 5 and (Xi N 0 ⁇ i, 0 0 ⁇ m, N or:
- the sixth first codebook is one of the following matrices:
- the seventh first codebook is one of the following matrices:
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Abstract
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EP14891944.2A EP3133747B1 (en) | 2014-05-15 | 2014-05-15 | Method and apparatus for transmitting and feeding back signal |
KR1020187027885A KR101995826B1 (ko) | 2014-05-15 | 2014-05-15 | 채널 정보를 측정하고 피드백하는 방법 및 장치 |
KR1020167034614A KR101904411B1 (ko) | 2014-05-15 | 2014-05-15 | 채널 정보를 측정하고 피드백하는 방법 및 장치 |
BR112016026675-7A BR112016026675B1 (pt) | 2014-05-15 | 2014-05-15 | Método para medir e relatar informação de canal, aparelho de terminal e aparelho de comunicações |
EP18208285.9A EP3540976A1 (en) | 2014-05-15 | 2014-05-15 | Method and apparatus for transmitting and feeding back signal |
CN201480078876.6A CN106605375B (zh) | 2014-05-15 | 2014-05-15 | 一种信号的传输和反馈方法和装置 |
JP2017512082A JP6378425B2 (ja) | 2014-05-15 | 2014-05-15 | チャネル情報を測定し、フィードバックするための方法および装置 |
PCT/CN2014/077598 WO2015172365A1 (zh) | 2014-05-15 | 2014-05-15 | 一种信号的传输和反馈方法和装置 |
US15/352,381 US9838096B2 (en) | 2014-05-15 | 2016-11-15 | Method and apparatus for measuring and feeding back channel information |
US15/700,909 US10020856B2 (en) | 2014-05-15 | 2017-09-11 | Method and apparatus for measuring and feeding back channel information |
US16/015,831 US10367556B2 (en) | 2014-05-15 | 2018-06-22 | Method and apparatus for measuring and feeding back channel information |
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WO2023083353A1 (zh) * | 2021-11-12 | 2023-05-19 | 中国移动通信有限公司研究院 | 相位配置方法、装置、设备及存储介质 |
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EP3540976A1 (en) | 2019-09-18 |
KR20170007382A (ko) | 2017-01-18 |
EP3133747A4 (en) | 2017-05-03 |
JP2017522832A (ja) | 2017-08-10 |
US20170373734A1 (en) | 2017-12-28 |
KR101904411B1 (ko) | 2018-10-05 |
US20180309485A1 (en) | 2018-10-25 |
JP6378425B2 (ja) | 2018-08-22 |
US9838096B2 (en) | 2017-12-05 |
US10367556B2 (en) | 2019-07-30 |
KR101995826B1 (ko) | 2019-07-03 |
US20170070272A1 (en) | 2017-03-09 |
CN106605375B (zh) | 2020-06-26 |
BR112016026675B1 (pt) | 2022-12-13 |
EP3133747A1 (en) | 2017-02-22 |
US10020856B2 (en) | 2018-07-10 |
BR112016026675A2 (pt) | 2017-08-15 |
EP3133747B1 (en) | 2018-12-12 |
CN106605375A (zh) | 2017-04-26 |
KR20180108922A (ko) | 2018-10-04 |
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