WO2017202237A1 - 一种无线通信中的方法和装置 - Google Patents
一种无线通信中的方法和装置 Download PDFInfo
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- WO2017202237A1 WO2017202237A1 PCT/CN2017/084816 CN2017084816W WO2017202237A1 WO 2017202237 A1 WO2017202237 A1 WO 2017202237A1 CN 2017084816 W CN2017084816 W CN 2017084816W WO 2017202237 A1 WO2017202237 A1 WO 2017202237A1
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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
- H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
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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
- 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
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/063—Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
Definitions
- the present invention relates to a method and apparatus for multi-antenna transmission in the field of mobile communication technologies, and more particularly to a scheme of CSI (Channel Status Information) feedback in a scenario where multiple antennas are deployed on a base station side.
- CSI Channel Status Information
- the UE In the downlink multi-antenna transmission, the UE (User Equipment) usually feeds back CSI to assist the base station to perform precoding. Implicit CSI feedback is supported in the traditional 3GPP-3rd Generation Partner Project cellular network system.
- the implicit CSI includes a CRI (CSI-RS Resource Indicator), an RI (Rank Indicator), a PMI (Precoding Matrix Indicator), a CQI (Channel Quality Indicator), and the like.
- the rank of the matrix corresponding to the PMI fed back by the UE is indicated by the RI fed back by the UE.
- LC Linear Combination
- potential explicit CSI schemes include feature vector feedback, covariance matrix feedback, and so on.
- the present invention discloses a solution to the above problems. It should be noted that, in the case of no conflict, the features in the embodiments and embodiments in the UE (User Equipment) of the present application can be applied to the base station, and vice versa. Further, the features of the embodiments and the embodiments of the present application may be combined with each other arbitrarily without conflict.
- the UE may reduce the CSI feedback overhead by only feeding back part of the feature vector (and the corresponding feature value) at a time, and improve the accuracy of the CSI feedback by multiple feedbacks.
- the present invention discloses a method used in a UE for downlink multi-antenna transmission, which includes the following steps:
- Step A transmitting the first wireless signal in the first time window
- Step B Send the second wireless signal in the second time window.
- the first wireless signal includes first information and a first parameter
- the second wireless signal includes second information.
- the first information is used to determine a first matrix.
- the second information is used to determine a second matrix.
- the rank of the first matrix is R1, and the rank of the second matrix is R2.
- An average value of the feature values of the first matrix is greater than an average value of the feature values of the second matrix.
- the first parameter is linearly related to the sum of the R1 plus the R2.
- the first parameter indicates a rank of a downlink channel matrix.
- the UE feeds back the downlink channel matrix step by step to reduce feedback overhead while ensuring feedback accuracy.
- the first parameter indicates a rank of a downlink channel covariance matrix.
- the UE feeds back the covariance matrix of the downlink channel in two steps to reduce the feedback overhead and ensure the feedback precision.
- the first parameter is equal to the sum of the R1 plus the R2.
- the UE feeds back downlink channel matrix related information twice.
- the foregoing method further includes the following steps:
- Step B2. Send a third wireless signal in a third time window.
- the third wireless signal includes third information.
- the third information is used to determine a fourth matrix.
- the rank of the fourth matrix is R3.
- An average value of the feature values of the second matrix is greater than an average value of the feature values of the fourth matrix.
- the first parameter is linearly related to the sum of the R1 plus the R2 plus the R3.
- the first parameter is equal to the sum of the R1 plus the R2 plus R3.
- the UE feeds back downlink channel matrix related information in three times.
- the UE feeds back the downlink channel matrix related information in M times, and the M is greater than 2.
- the first wireless signal and the second wireless signal respectively correspond to one feedback in the M feedbacks.
- the first time window includes a positive integer number of consecutive subframes
- the second time window includes a positive integer number of subframes
- the subframes in the second time window belong to the first time window
- the second time window is after the first time window.
- the first time window includes a positive integer number of consecutive subframes, and the first parameter is transmitted in an earliest one of the first time windows, the first information is in the The transmission is performed in the subframe after the earliest one subframe.
- the R1 is a constant 1.
- the second wireless signal further includes physical layer data.
- the physical layer data is transmitted on a PUSCH (Physical Uplink Shared Channel).
- PUSCH Physical Uplink Shared Channel
- the transport channel corresponding to the physical layer data is a UL-SCH (Uplink Shared CHannel).
- UL-SCH Uplink Shared CHannel
- the first information is quantization information of the first matrix.
- the second information is quantization information of the second matrix.
- the first information is an index of a first matrix in a first candidate matrix set
- the first candidate matrix set includes a positive integer number of matrices.
- the second information is an index of the second matrix in the second candidate matrix set, and the second candidate matrix set includes a positive integer number of matrices.
- a minimum value of the feature values of the first matrix is greater than or equal to a maximum value of the feature values of the second matrix.
- the first matrix and the second matrix are respectively a full rank matrix.
- the first wireless signal and the second wireless signal are transmitted on a physical layer control channel (ie, a physical layer channel that can only be used to carry physical layer signaling).
- a physical layer control channel ie, a physical layer channel that can only be used to carry physical layer signaling.
- the first wireless signal and the second wireless signal are transmitted on a physical layer data channel (ie, a physical layer channel that can be used to carry physical layer data).
- a physical layer data channel ie, a physical layer channel that can be used to carry physical layer data.
- the first wireless signal is transmitted on a physical layer control channel (ie, a physical layer channel that can only be used to carry physical layer signaling), and the second wireless signal is in a physical layer. Transmission on the data channel.
- a physical layer control channel ie, a physical layer channel that can only be used to carry physical layer signaling
- the second wireless signal is in a physical layer. Transmission on the data channel.
- the step A further includes the following steps:
- Step A0 Perform channel measurements for the first frequency domain resource to obtain a first channel matrix.
- the minimum value of the feature values of the first projection matrix is greater than or equal to the maximum value of the feature values of the second projection matrix.
- the first projection matrix is obtained by multiplying the first channel matrix by the first matrix
- the second projection matrix is obtained by multiplying the first channel matrix by the second matrix.
- the first matrix is associated with the first frequency domain resource.
- the first frequency domain resource is a system bandwidth of one carrier.
- the first frequency domain resource is part of a system bandwidth of one carrier.
- the second matrix is associated with the first frequency domain resource.
- the step B further includes the following steps:
- Step B0 Perform channel measurement for the second frequency domain resource to obtain a second channel matrix.
- the second matrix is associated with the second frequency domain resource.
- the first information, the second information ⁇ is used to determine a third matrix, the rank of the third matrix being the sum of the R1 plus the R2.
- the R2 vectors in the third matrix are respectively R2 vectors in the second matrix.
- the other R1 vectors in the third matrix are respectively R1 vectors in the first matrix; or the other R1 vectors in the third matrix are R1 vectors in the first enhancement matrix, respectively.
- the first information, the second information ⁇ is used to determine a first enhancement matrix, the rank of the first enhancement matrix being R1.
- the quantization precision of the first enhancement matrix is higher than the quantization precision of the first matrix.
- the third matrix is a full rank matrix.
- the second frequency domain resource and the first frequency domain resource partially or completely overlap.
- the R1 vectors in the third matrix are respectively R1 vectors in the first enhancement matrix, and the sum of squares of the feature values of the third projection matrix is smaller than the fourth projection.
- the third projection matrix is composed of The second channel matrix is obtained by multiplying the first matrix, and the fourth projection matrix is obtained by multiplying the second channel matrix by the first enhancement matrix.
- the step A further includes the following steps:
- the first signaling is used to determine at least one of ⁇ a time-frequency resource occupied by the first wireless signal, the first frequency domain resource ⁇ .
- the step B further includes the following steps:
- the second signaling is used to determine at least one of ⁇ a time-frequency resource occupied by the second wireless signal, the second frequency domain resource ⁇ .
- the first wireless signal is transmitted on a physical layer control channel and the second wireless signal is transmitted on a physical layer data channel.
- the second wireless signal further includes physical layer data.
- the method further includes the following steps:
- Step C Receive a third wireless signal.
- the first matrix and the second matrix are used to generate the third wireless signal, or the first enhancement matrix and the second matrix are used to generate the third wireless signal.
- the third radio signal is transmitted on a PDSCH (Physical Downlink Shared Channel).
- PDSCH Physical Downlink Shared Channel
- the transport channel corresponding to the third radio signal is a DL-SCH (DownLink Shared Channel).
- the first enhancement matrix and the second matrix are used to determine a precoding matrix corresponding to the third wireless signal.
- the column vector in the precoding matrix corresponding to the third wireless signal includes a column vector in the first enhancement matrix and a column vector in the second matrix.
- the invention discloses a method used in a base station for downlink multi-antenna transmission, which comprises the following steps:
- Step A receiving the first wireless signal in the first time window
- Step B Receive a second wireless signal in a second time window.
- the first wireless signal includes first information and a first parameter
- the second wireless signal includes second information.
- the first information is used to determine a first matrix.
- the second information is used to determine a second matrix.
- the rank of the first matrix is R1, and the rank of the second matrix is R2.
- An average value of the feature values of the first matrix is greater than an average value of the feature values of the second matrix.
- the first parameter is linearly related to the sum of the R1 plus the R2.
- the step A further includes the following steps:
- Step A0 It is assumed that R1 vectors in the first matrix respectively correspond to R1 feature vectors including eigenvalue information of the first channel matrix.
- the R1 feature vectors including the feature value information respectively correspond to the largest R1 feature values of the feature values of the first channel matrix.
- the first channel matrix is for a radio channel from a cell maintained by the base station to a sender of the first radio signal, the first channel matrix being for a first frequency domain resource.
- the feature value information is a normalized value of a corresponding feature value relative to a maximum feature value.
- the base station in the step A0 assumes that R1 vectors in the first matrix are respectively quantized according to R1 target vectors of the first channel matrix, and the target vector is characterized by The vector is multiplied by the corresponding eigenvalue.
- the first matrix is used for scheduling of a sender of the first wireless signal.
- the first matrix is used by the base station for user scheduling.
- the first matrix should not cause significant performance loss, considering that the CSI accuracy required for scheduling is lower than the CSI accuracy required for precoding.
- Feedback of the first matrix can significantly reduce feedback overhead compared to feedback R1+R2 vectors.
- the step B further includes the following steps:
- Step B0 It is assumed that R vectors in the third matrix respectively correspond to R feature vectors of the second channel matrix including feature value information.
- R is the sum of the R1 plus the R2, ⁇ the first information, the second information ⁇ is used to determine a third matrix, and the rank of the third matrix is the R.
- the third The R2 vectors in the matrix are respectively R2 vectors in the second matrix.
- the other R1 vectors in the third matrix are respectively R1 vectors in the first matrix; or the other R1 vectors in the third matrix are R1 vectors in the first enhancement matrix, respectively.
- the first information, the second information ⁇ is used to determine a first enhancement matrix, the rank of the first enhancement matrix being R1.
- the second channel matrix is for a radio channel maintained by the cell maintained by the base station to a sender of the first radio signal, and the second channel matrix is for a second frequency domain resource.
- the third matrix is a full rank matrix.
- the R feature vectors including the feature value information respectively correspond to the largest R feature values of the feature values of the second channel matrix.
- the first matrix is used for scheduling for a sender of the first wireless signal.
- the frequency domain resource for the scheduling belongs to the first frequency domain resource.
- the third matrix is used for precoding of a sender of the first wireless signal.
- the third matrix includes all vectors of the first matrix and the second matrix, or the first The enhancement matrix and all vectors of the second matrix have a higher precision than the first matrix or the second matrix.
- the precoded wireless signal is transmitted over the second frequency domain resource.
- the quantization precision of the first enhancement matrix is higher than the first matrix.
- the step A further includes the following steps:
- Step A1 Send the first signaling.
- the first signaling is used to determine at least one of ⁇ a time-frequency resource occupied by the first wireless signal, the first frequency domain resource ⁇ .
- the first signaling is physical layer signaling.
- the step B further includes the following steps:
- Step B1 Send the second signaling.
- the second signaling is used to determine at least one of ⁇ a time-frequency resource occupied by the second wireless signal, the second frequency domain resource ⁇ .
- the second signaling is physical layer signaling.
- the method further includes the following steps:
- Step C Send a third wireless signal.
- the first matrix and the second matrix are used to generate the third wireless signal, or the first enhancement matrix and the second matrix are used to generate the third wireless signal.
- the first enhancement matrix and the second matrix are used to generate the third wireless signal.
- the accuracy of the first enhancement matrix used in base station precoding is higher than the accuracy of the first matrix used in base station scheduling, and a better precoding gain can be obtained.
- the invention discloses a user equipment used for downlink multi-antenna transmission, which comprises the following modules:
- a first processing module configured to send the first wireless signal in the first time window
- a second processing module configured to send the second wireless signal in the second time window
- the first receiving module is configured to receive the third wireless signal.
- the first wireless signal includes first information and a first parameter
- the second wireless signal includes second information.
- the first information is used to determine a first matrix.
- the second information is used to determine a second matrix.
- the rank of the first matrix is R1, and the rank of the second matrix is R2.
- An average value of the feature values of the first matrix is greater than an average value of the feature values of the second matrix.
- the first matrix and the second matrix are used to generate the third wireless signal, or the first enhancement matrix and the second matrix are used to generate the third wireless signal.
- the first parameter is linearly related to the sum of the R1 plus the R2.
- the foregoing user equipment is characterized in that the first processing module is further configured to perform channel measurement on the first frequency domain resource to obtain a first channel matrix.
- the minimum value of the feature values of the first projection matrix is greater than or equal to the maximum value of the feature values of the second projection matrix.
- the first projection matrix is obtained by multiplying the first channel matrix by the first matrix
- the second projection matrix is obtained by multiplying the first channel matrix by the second matrix.
- the first matrix is associated with the first frequency domain resource.
- the foregoing user equipment is characterized in that the second processing module further And performing channel measurement for the second frequency domain resource to obtain a second channel matrix.
- the second matrix is associated with the second frequency domain resource.
- the first information, the second information ⁇ is used to determine a third matrix, the rank of the third matrix being the sum of the R1 plus the R2.
- the R2 vectors in the third matrix are respectively R2 vectors in the second matrix.
- the other R1 vectors in the third matrix are respectively R1 vectors in the first matrix; or the other R1 vectors in the third matrix are R1 vectors in the first enhancement matrix, respectively.
- the first information, the second information ⁇ is used to determine a first enhancement matrix, the rank of the first enhancement matrix being R1.
- the user equipment is characterized in that: R1 vectors in the third matrix are respectively R1 vectors in the first enhancement matrix, and a sum of squares of eigenvalues of the third projection matrix is smaller than a fourth projection matrix. The sum of the squares of the feature values.
- the third projection matrix is obtained by multiplying the second channel matrix by the first matrix
- the fourth projection matrix is obtained by multiplying the second channel matrix by the first enhancement matrix.
- the foregoing user equipment is characterized in that the first processing module is further configured to receive the first signaling.
- the first signaling is used to determine at least one of ⁇ a time-frequency resource occupied by the first wireless signal, the first frequency domain resource ⁇ .
- the user equipment is characterized in that the second processing module is further configured to receive the second signaling.
- the second signaling is used to determine at least one of ⁇ a time-frequency resource occupied by the second wireless signal, the second frequency domain resource ⁇ .
- the invention discloses a base station device used for downlink multi-antenna transmission, which comprises the following modules:
- a third processing module configured to receive the first wireless signal in the first time window
- a fourth processing module configured to receive the second wireless signal in the second time window
- the first sending module is configured to send a third wireless signal.
- the first wireless signal includes first information and a first parameter
- the second wireless signal includes second information.
- the first information is used to determine a first matrix.
- the second information is used to determine a second matrix.
- the rank of the first matrix is R1, and the rank of the second matrix is R2.
- An average value of the feature values of the first matrix is greater than an average value of the feature values of the second matrix.
- the first matrix and the second matrix are used to generate the third wireless signal, or the first enhancement matrix and the second matrix are used to generate the third wireless signal. Said
- the first parameter is linearly related to the sum of R1 plus R2.
- the foregoing base station device is characterized in that the third processing module is further configured to assume that R1 vectors in the first matrix respectively correspond to R1 feature vectors including feature value information of the first channel matrix.
- the R1 feature vectors including the feature value information respectively correspond to the largest R1 feature values of the feature values of the first channel matrix.
- the first channel matrix is for a radio channel from a cell maintained by the base station to a sender of the first radio signal, the first channel matrix being for a first frequency domain resource.
- the foregoing base station device is characterized in that the third processing module is further configured to send the first signaling.
- the first signaling is used to determine at least one of ⁇ a time-frequency resource occupied by the first wireless signal, the first frequency domain resource ⁇ .
- the foregoing base station device is characterized in that the fourth processing module is further configured to assume that R vectors in the third matrix respectively correspond to R feature vectors of the second channel matrix including feature value information.
- R is the sum of the R1 plus the R2, ⁇ the first information, the second information ⁇ is used to determine a third matrix, and the rank of the third matrix is the R.
- the R2 vectors in the third matrix are respectively R2 vectors in the second matrix.
- the other R1 vectors in the third matrix are respectively R1 vectors in the first matrix; or the other R1 vectors in the third matrix are R1 vectors in the first enhancement matrix, respectively.
- the first information, the second information ⁇ is used to determine a first enhancement matrix, the rank of the first enhancement matrix being R1.
- the second channel matrix is for a radio channel maintained by the cell maintained by the base station to a sender of the first radio signal, and the second channel matrix is for a second frequency domain resource.
- the foregoing base station device is characterized in that the fourth processing module is further configured to send the second signaling.
- the second signaling is used to determine at least one of ⁇ a time-frequency resource occupied by the second wireless signal, the second frequency domain resource ⁇ .
- the invention has the following advantages:
- the base station dynamically triggers the transmission of the second information, further reducing the CSI feedback overhead.
- Figure 1 shows a flow chart of a downlink transmission in accordance with one embodiment of the present invention
- Figure 2 shows a schematic diagram of a first time window in accordance with one embodiment of the present invention
- FIG. 3 is a block diagram showing the structure of a processing device for use in a UE according to an embodiment of the present invention
- FIG. 4 is a block diagram showing the structure of a processing device for use in a base station according to an embodiment of the present invention
- Embodiment 1 illustrates a flow chart of downlink transmission, as shown in FIG.
- base station N1 is a serving cell maintenance base station of UE U2.
- the steps in block F0, block F1, block F2 and block F3 are optional, respectively.
- step S201 For U2, performing channel measurement for the first frequency domain resource in step S201 to obtain a first channel matrix; receiving the first signaling in step S202; transmitting the first wireless signal in the first time window in step S21; Performing channel measurement for the second frequency domain resource in step S203 to obtain the second channel matrix; receiving the second signaling in step S204; transmitting the second wireless signal in the second time window in step S22; receiving in step S23 The third wireless signal.
- the first wireless signal includes first information and a first parameter
- the second wireless signal includes second information.
- the first information is used by the N1 to determine a first matrix.
- the second information is used by the N1 to determine a second matrix.
- the rank of the first matrix is R1, and the rank of the second matrix is R2.
- An average value of the feature values of the first matrix is greater than an average value of the feature values of the second matrix.
- the first parameter is linearly related to the sum of the R1 plus the R2.
- the minimum value of the eigenvalues of the first projection matrix is greater than or equal to the maximum value of the eigenvalues of the second projection matrix.
- the first projection matrix is obtained by multiplying the first channel matrix by the first matrix
- the second projection matrix is obtained by multiplying the first channel matrix by the second matrix.
- the first matrix is associated with the first frequency domain resource.
- the second matrix is associated with the second frequency domain resource.
- the first information, the second information ⁇ is used by the N1 to determine a third matrix, and the rank of the third matrix is the sum of the R1 plus the R2.
- the R2 vectors in the third matrix are respectively R2 vectors in the second matrix.
- the other R1 vectors in the third matrix are respectively R1 vectors in the first matrix; or the other R1 vectors in the third matrix are R1 vectors in the first enhancement matrix, respectively.
- the first information, the second information ⁇ is used to determine a first enhancement matrix, the rank of the first enhancement matrix being R1.
- the first signaling is used to determine at least one of ⁇ a time frequency resource occupied by the first wireless signal, the first frequency domain resource ⁇ .
- the second signaling is used to determine at least one of ⁇ a time-frequency resource occupied by the second wireless signal, the second frequency domain resource ⁇ .
- the first matrix and the second matrix are used to generate the third wireless signal, or the first enhancement matrix and the second matrix are used to generate the third wireless signal.
- the first channel matrix is a downlink channel parameter matrix, and the eigenvalue decomposition of the first channel matrix is expressed as Where N T , N r , U 1 , D 1 , V 1 are: the number of antenna ports measured by U2 in step S202, the number of receiving antennas of U2, N T ⁇ N T- order matrix, N T ⁇ N R- order diagonal matrix (diagonal elements arranged in descending order from top to bottom), N r ⁇ N r- order ⁇ matrix. among them Indicates the conjugate transpose of V 1 .
- the first matrix is Quantitative values, where d 1 j , v 1 j are the non-zero elements of the jth row in D 1 and the j th column vector in V 1 , respectively.
- the second matrix is Quantitative value.
- R 1 + R 2 is less than or equal to N r .
- the second channel matrix is a downlink channel parameter matrix
- the eigenvalue decomposition of the second channel matrix is expressed as
- N t , N r , U 2 , D 2 , V 2 are: the number of antenna ports measured by U2 in step S202, the number of receiving antennas of U2, N t ⁇ N t order ⁇ matrix, N t ⁇ N R- order diagonal matrix (non-zero elements are arranged in descending order from top to bottom), N r ⁇ N r- order ⁇ matrix. among them Indicates a conjugate transpose of V 2 .
- the second matrix is Quantitative value. Where d 2 j , v 2 j are the non-zero elements of the jth row in D 2 and the j th column vector in V 2 , respectively.
- the first enhancement matrix is Quantitative value.
- the quantization precision of the first enhancement matrix is higher than the quantization precision of the first matrix.
- the first channel matrix is a covariance matrix of a downlink channel.
- E(x) represents the mean of x
- N T and N r are respectively: the number of antenna ports measured by U2 in step S202, and the number of receiving antennas of U2.
- the eigenvalue decomposition of the first channel matrix is expressed as Where U 1 and D 1 are: N T ⁇ N T- order ⁇ matrix, N T ⁇ N T- order diagonal matrix (diagonal elements are arranged in descending order from top to bottom). among them Indicates the conjugate transpose of U 1 .
- the first matrix is Quantitative values, where d 1 j , v 1 j are the non-zero elements of the jth row in D 1 and the j th column vector in U 1 , respectively.
- the second matrix is Quantitative value.
- R 1 + R 2 is less than or equal to N T .
- the second channel matrix is a covariance matrix of a downlink channel.
- E(x) represents the mean of x
- N T and N r are respectively: the number of antenna ports measured by U2 in step S202, and the number of receiving antennas of U2.
- the eigenvalue decomposition of the second channel matrix is expressed as Where U 2 and D 2 are: N t ⁇ N t order ⁇ matrix, N T ⁇ N T order diagonal matrix (non-zero elements are arranged in descending order from top to bottom). among them Indicates the conjugate transpose of U 2 .
- the second matrix is Quantitative value. Where d 2 j , v 2 j are the non-zero elements of the jth row in D 2 and the j th column vector in U 2 , respectively.
- the first enhancement matrix is Quantitative value.
- the quantization precision of the first enhancement matrix is higher than the quantization precision of the first matrix.
- the first frequency domain resource is a system bandwidth
- the second frequency domain resource is a part of the system bandwidth
- the first frequency domain resource and the second frequency domain resource are the same.
- the first frequency domain resource and the second frequency domain resource partially overlap.
- the first signaling and the second signaling are physical layer signaling.
- the first signaling is high layer signaling
- the second signaling is physical layer signaling
- the steps in block F1 occur, the steps in block F3 do not occur, and the first frequency domain resource is the second frequency domain resource.
- the steps in block F1 do not occur, the steps in block F3 occur, the first frequency domain resource is system bandwidth, and the second frequency domain resource is the first Part of the frequency domain resource.
- Embodiment 2 illustrates a schematic diagram of a first time window, as shown in FIG.
- the first time window includes Q consecutive subframes, and the corresponding subframe index is ⁇ n, n+1, . . . , n+Q-1 ⁇ .
- the first parameter is transmitted in the first subframe of the first time window, ie, subframe n.
- the UE reports only the first parameter once in the first time window.
- the first information is transmitted in the subframe n+q1 in the first time window
- the second time window includes a positive integer contiguous subframe
- the second time window is located in the first Within a time window.
- Embodiment 3 is a structural block diagram of a processing device for use in a UE, as shown in FIG.
- the UE device 200 is mainly composed of a first processing module 201, a second processing module 202, and a first receiving module 203.
- the first processing module 201 is configured to send the first wireless signal in the first time window;
- the processing module 202 is configured to send the second wireless signal in the second time window;
- the first receiving module 203 is configured to receive the third wireless signal.
- the first wireless signal includes first information and a first parameter
- the second wireless signal includes second information.
- the first information is used to determine a first matrix.
- the second information is used to determine a second matrix.
- the rank of the first matrix is R1, and the rank of the second matrix is R2.
- An average value of the feature values of the first matrix is greater than an average value of the feature values of the second matrix.
- the first matrix and the second matrix are used to generate the third wireless signal, or the first enhancement matrix and the second matrix are used to generate the third wireless signal.
- the first parameter is equal to the sum of the R1 plus the R2.
- the R1 is a fixed constant 1.
- the R1 is configurable.
- Embodiment 4 is a structural block diagram of a processing device used in a base station, as shown in FIG.
- the base station apparatus 300 is composed of a third processing module 301, a fourth processing module 302, and a first transmitting module 303.
- the third processing module 301 is configured to receive the first wireless signal in the first time window; the fourth processing module 302 is configured to receive the second wireless signal in the second time window; the first sending module 303 is configured to send the third wireless signal .
- the first wireless signal includes first information and a first parameter
- the second wireless signal includes second information.
- the first information is used to determine a first matrix.
- the second information is used to determine a second matrix.
- the rank of the first matrix is R1, and the rank of the second matrix is R2.
- the minimum value of the feature values of the first matrix is greater than the maximum value of the feature values of the second matrix.
- the first matrix and the second matrix are used to generate the third wireless signal, or the first enhancement matrix and the second matrix are used to generate the third wireless signal.
- the first parameter is equal to the sum of the R1 plus the R2.
- the first information is an implicit CSI
- the second information is an explicit CSI
- the UE in the present invention includes, but is not limited to, a wireless communication device such as a mobile phone, a tablet computer, a notebook, a network card, an NB-IOT terminal, and an eMTC terminal.
- the base station or system equipment in the present invention includes, but is not limited to, a macro communication base station, a micro cell base station, a home base station, a relay base station, and the like.
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Abstract
Description
Claims (15)
- 一种被用于下行多天线传输的UE中的方法,其中,包括如下步骤:-步骤A.在第一时间窗中发送第一无线信号;-步骤B.在第二时间窗中发送第二无线信号;其中,所述第一无线信号包括第一信息和第一参数,所述第二无线信号包括第二信息;所述第一信息被用于确定第一矩阵;所述第二信息被用于确定第二矩阵;所述第一矩阵的秩为R1,所述第二矩阵的秩为R2;所述第一矩阵的特征值的平均值大于所述第二矩阵的特征值的平均值;所述第一参数与所述R1加上所述R2的和线性相关。
- 根据权利要求1所述的方法,其特征在于,所述步骤A还包括如下步骤:-步骤A0.针对第一频域资源执行信道测量,得到第一信道矩阵。其中,第一投影矩阵的特征值的最小值大于或者等于第二投影矩阵的特征值的最大值。所述第一投影矩阵是由所述第一信道矩阵乘以所述第一矩阵得到,所述第二投影矩阵是由所述第一信道矩阵乘以所述第二矩阵得到。所述第一矩阵和所述第一频域资源相关联。
- 根据权利要求1或2所述的方法,其特征在于,所述步骤B还包括如下步骤:-步骤B0.针对第二频域资源执行信道测量,得到第二信道矩阵。其中,所述第二矩阵和所述第二频域资源相关联。{所述第一信息,所述第二信息}被用于确定第三矩阵,所述第三矩阵的秩为所述R1加上所述R2的和。所述第三矩阵中的R2个向量分别是所述第二矩阵中的R2个向量。所述第三矩阵中的另外R1个向量分别是所述第一矩阵中的R1个向量;或者所述第三矩阵中的另外R1个向量分别是第一增强矩阵中的R1个向量,{所述第一信息,所述第二信息}中的至少所述第二信息被用于确定第一增强矩阵,所述第一增强矩阵的秩为R1。
- 根据权利要求3所述的方法,其特征在于,所述第三矩阵中的R1个向量分别是第一增强矩阵中的R1个向量,第三投影矩阵的特征值的平方和小于第四投影矩阵的特征值的平方和。所述第三投影矩阵是由所述第二信道矩阵乘以所述第一矩阵得到,所述第四投影矩阵是由所述第二信道矩阵乘以所述第一增强矩阵得到。
- 根据权利要求1-4中任意权利要求所述的方法,其特征在于,所述步骤A还包括如下步骤:-步骤A1.接收第一信令。其中,所述第一信令被用于确定{所述第一无线信号所占用的时频资源,所述第一频域资源}中的至少之一。
- 根据权利要求1-4中任意权利要求所述的方法,其特征在于,所述步骤B还包括如下步骤:-步骤B1.接收第二信令。其中,所述第二信令被用于确定{所述第二无线信号所占用的时频资源,所述第二频域资源}中的至少之一。
- 根据权利要求1-6中任意权利要求所述的方法,其特征在于,还包括如下步骤:-步骤C.接收第三无线信号。其中,所述第一矩阵和所述第二矩阵被用于生成所述第三无线信号,或者所述第一增强矩阵和所述第二矩阵被用于生成所述第三无线信号。
- 一种被用于下行多天线传输的基站中的方法,其中,包括如下步骤:-步骤A.在第一时间窗中接收第一无线信号;-步骤B.在第二时间窗中接收第二无线信号;其中,所述第一无线信号包括第一信息和第一参数,所述第二无线信号包括第二信息;所述第一信息被用于确定第一矩阵;所述第二信息被用于确定第二矩阵;所述第一矩阵的秩为R1,所述第二矩阵的秩为R2;所述第一矩阵的特征值的平均值大于所述第二矩阵的特征值的平均值;所述第一参数与所述R1加上所述R2的和线性相关。
- 根据权利要求8所述的方法,其特征在于,所述步骤A还包括如下步骤:-步骤A0.假定所述第一矩阵中的R1个向量分别对应第一信道矩阵的R1个包括特征值信息的特征向量。其中,所述R1个包括特征值信息的特征向量分别对应所述第一信道矩阵的特征值中最大的R1个特征值。所述第一信道矩阵针对从所述 基站维持的小区到所述第一无线信号的发送者的无线信道,所述第一信道矩阵针对第一频域资源。
- 根据权利要求8或9所述的方法,其特征在于,所述步骤B还包括如下步骤:-步骤B0.假定第三矩阵中的R个向量分别对应第二信道矩阵的R个包括特征值信息的特征向量。其中,所述R是所述R1加上所述R2的和,{所述第一信息,所述第二信息}被用于确定第三矩阵,所述第三矩阵的秩为所述R。所述第三矩阵中的R2个向量分别是所述第二矩阵中的R2个向量。所述第三矩阵中的另外R1个向量分别是所述第一矩阵中的R1个向量;或者所述第三矩阵中的另外R1个向量分别是第一增强矩阵中的R1个向量,{所述第一信息,所述第二信息}中的至少所述第二信息被用于确定第一增强矩阵,所述第一增强矩阵的秩为R1。所述第二信道矩阵针对从所述基站维持的小区到所述第二无线信号的发送者的无线信道,所述第二信道矩阵针对第二频域资源。
- 根据权利要求8-10中任意权利要求所述的方法,其特征在于,所述步骤A还包括如下步骤:-步骤A1.发送第一信令。其中,所述第一信令被用于确定{所述第一无线信号所占用的时频资源,所述第一频域资源}中的至少之一。
- 根据权利要求8-10中任意权利要求所述的方法,其特征在于,所述步骤B还包括如下步骤:-步骤B1.发送第二信令。其中,所述第二信令被用于确定{所述第二无线信号所占用的时频资源,所述第二频域资源}中的至少之一。
- 根据权利要求8-12中任意权利要求所述的方法,其特征在于,还包括如下步骤:-步骤C.发送第三无线信号。其中,所述第一矩阵和所述第二矩阵被用于生成所述第三无线信号,或者所述第一增强矩阵和所述第二矩阵被用于生成所述第三无线信号。
- 一种被用于下行多天线传输的用户设备,其中,包括如下模块:第一处理模块:用于在第一时间窗中发送第一无线信号;第二处理模块:用于在第二时间窗中发送第二无线信号;第一接收模块:用于接收第三无线信号;其中,所述第一无线信号包括第一信息和第一参数,所述第二无线信号包括第二信息;所述第一信息被用于确定第一矩阵;所述第二信息被用于确定第二矩阵。所述第一矩阵的秩为R1,所述第二矩阵的秩为R2;所述第一矩阵的特征值的平均值大于所述第二矩阵的特征值的平均值;所述第一矩阵和所述第二矩阵被用于生成所述第三无线信号,或者所述第一增强矩阵和所述第二矩阵被用于生成所述第三无线信号;所述第一参数与所述R1加上所述R2的和线性相关。
- 一种被用于下行多天线传输的基站设备,其中,包括如下模块:第三处理模块:用于在第一时间窗中接收第一无线信号;第四处理模块:用于在第二时间窗中接收第二无线信号;第一发送模块:用于发送第三无线信号;其中,所述第一无线信号包括第一信息和第一参数,所述第二无线信号包括第二信息;所述第一信息被用于确定第一矩阵;所述第二信息被用于确定第二矩阵;所述第一矩阵的秩为R1,所述第二矩阵的秩为R2;所述第一矩阵的特征值的平均值大于所述第二矩阵的特征值的平均值;所述第一矩阵和所述第二矩阵被用于生成所述第三无线信号,或者所述第一增强矩阵和所述第二矩阵被用于生成所述第三无线信号;所述第一参数与所述R1加上所述R2的和线性相关。
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