TW201739198A - Channel state information feedback and reception method and apparatus - Google Patents

Abstract

Disclosed in the present application are a channel state information feedback and reception method and apparatus, for use in resolving the problem of low stability of existing MIMO feedback solutions when the speed of a UE is high. The method comprises: according to a determined shaping mode, a terminal performs shaping on I precoding units in at least one time-frequency resource by using different precoding matrices in a precoding matrix set corresponding to the shaping mode, the time-frequency resource being divided into I precoding units, the shaping mode indicating a mapping relationship between the I precoding units in the time-frequency resource and the precoding matrices in the precoding matrix set corresponding to the shaping mode, and I being an integer greater than 1; and the terminal performs channel measurement on the shaped time-frequency resource to obtain CQI corresponding to the time-frequency resource, and feeds back the CQI corresponding to the time-frequency resource.

Description

Channel state information feedback and receiving method and device

The present invention belongs to the field of communication technologies, and in particular, to a channel state information feedback and reception method and apparatus.

In a multi-antenna system, the base station (evolved Node B, eNB) side needs reliable channel information (CSI) for data scheduling and signal transmission. The CSI is measured by the user equipment (User Equipment, UE) through the downlink pilot signal, and is notified to the eNB by means of feedback. Assuming that a multiple input multiple output (MIMO) system includes Nt transmit antennas and Nr receive antennas, the MIMO signal is a complex matrix of Nt×Nr. In the actual communication system, the UE does not feed back Nt×Nr complex information to the eNB side to implement CSI feedback. The MIMO feedback shaping technology is mostly based on an implicit feedback scheme. The system pre-defines a set of possible precoding matrices (also called a mating matrix) called a codebook. The UE is from the codebook. Select the optimal shaping matrix and feed back its index, which is the Precoding Matrix Indicator (PMI), and simultaneously feed back the channel quality indicator received when using the shaping matrix corresponding to the PMI. Indicator, CQI).

Optionally, the UE may also send a Rank Indication (RI) to notify the eNB that the information about the number of data flows can be received. For example, the UE returns an RI value of r and a PMI value of k. The representative UE suggests that the eNB uses the k-th shape matrix in the rank-r codebook for shaping, and the rank-r codebook includes a set of matrices of dimensions Nt×r.

The existing MIMO feedback scheme is based on a closed-loop design. For each feedback time-frequency resource, such as a subband, a set of physical resource block pairs (PRB pairs; Physical Resource Block, PRB) ), the UE returns the best PMI/CQI/RI. The Closed-loop feedback assumes that the system channel is relatively stable, so that the channel fed back in the subframe n can better reflect the channel of the subframe n+k at the moment when the eNB performs the actual data transmission after the k subframes. News. If the channel H(n) of subframe n and the channel H(n+k) of subframe n+k are not much different, the performance of closed-loop MIMO is ideal. However, in real systems, this assumption is not necessarily true, resulting in a significant drop in MIMO performance. For example, the channel change speed is related to the UE moving speed. When the UE speed is high (such as in a car or a high-speed railway), the channel changes greatly in each subframe, resulting in H(n) and H(n+k). The correlation is declining. For example, the UE measures the downlink channel and returns the CSI. The eNB uses the CSI to perform scheduling transmission with a certain delay time, which is a total of k subframes. In the Long Term Evolution (LTE) system, each subframe is 1 ms, so The total delay time is kms. When k is large, the performance of the closed-loop MIMO system is significantly degraded.

In summary, the existing MIMO feedback scheme has low reliability when the UE speed is large, and there is a time delay between the feedback timing and the data transmission moment, thereby causing the performance of the MIMO system to degrade.

The embodiments of the present invention provide a channel state information feedback and data transmission method and device, which are used to solve the problem that the existing MIMO feedback scheme has low reliability when the UE speed is large. There is also a time delay between the feedback time and the data transmission time, which leads to a problem of performance degradation of the MIMO system.

In a first aspect, a channel state information feedback method includes: a precoding unit in at least one time-frequency resource, using a different precoding matrix in a precoding matrix group corresponding to the shaping mode according to the determined shaping mode; The shaping is performed, wherein the time-frequency resource is divided into one precoding unit, and the shaping mode corresponds to a precoding matrix group, and the shaping mode represents one precoding unit and the shaping mode in the time-frequency resource. The mapping relationship between the precoding matrices in the corresponding precoding matrix group, I is an integer greater than 1; the terminal performs channel measurement on the shaped time-frequency resource, and obtains a channel quality indicator corresponding to the time-frequency resource (CQI) The terminal feeds back the CQI corresponding to the time-frequency resource.

In a possible implementation manner, if the number N of the shaping mode is greater than 1, the terminal feeds back the CQI corresponding to the time-frequency resource, and further includes: the terminal feeding back the index information of the shaping mode.

In a possible implementation manner, the one precoding unit is configured to divide the time-frequency resource in a time domain; or the one precoding unit is configured to divide the time-frequency resource in a frequency domain; or the one The precoding unit is obtained by jointly dividing the time-frequency resource in the time domain and the frequency domain.

In a possible implementation, each precoding unit in the one precoding unit includes at least one orthogonal frequency division multiplexing (OFDM) symbol, or at least one physical resource block (PRB); or the one pre Each precoding unit in the coding unit includes at least one subcarrier, or at least One PRB pair; or each precoding unit in the one precoding unit includes at least one resource granule (RE).

In a possible implementation, each precoding unit in the one precoding unit includes a group of subcarriers, wherein each subcarrier includes at least one demodulation reference signal (DMRS) symbol.

In a possible implementation manner, the number of the shaping modes is N, N shaping modes, and at least one piece of information in the precoding matrix included in each precoding matrix group corresponding to the shaping mode is pre-agreed or passed Obtained by a semi-static signal or a dynamic signal; or a set correspondence between the at least one piece of information and system parameters other than the at least one piece of information; The number I of precoding units in at least one time-frequency resource is pre-agreed or obtained by a semi-static signal or a dynamic signal; or the number I of pre-coding units in the time-frequency resource and the pre-coding unit There is a set correspondence between system parameters other than the number.

In a possible implementation manner, the shaping mode indicates that, in the time domain, using different precoding matrices in the precoding matrix group corresponding to the shaping mode, performing on one precoding unit in at least one time-frequency resource Forming; or the shaping mode indicates that in the frequency domain, using different precoding matrices in the precoding matrix group corresponding to the shaping mode, forming on the one precoding unit; or the shaping mode indication Performing shaping on the one precoding unit according to different precoding matrices in the precoding matrix group corresponding to the shaping mode according to the order of the first time domain and the frequency domain; or the shaping mode indication according to the pre-frequency domain The order of the post-time domain is shaped on the one pre-coding unit using different pre-coding matrices in the precoding matrix group corresponding to the shaping mode.

In a possible implementation manner, the precoding matrix group corresponding to the shaping mode is The precoding matrix is obtained by a function operation according to the first precoding matrix in the first codebook and the second precoding matrix in the second codebook; the shaping mode indicates that the same first precoding matrix is used and different The second precoding matrix is respectively shaped on the one precoding unit; or the shaping mode indicates that different first precoding matrices and different second precoding matrices are used, respectively, in the one precoding Forming on the unit.

In a possible implementation manner, if the shaping mode indicates that the same first precoding matrix and the different second precoding matrix are used, respectively forming on the one precoding unit, the terminal according to the shaping mode And using the different precoding matrices in the precoding matrix group corresponding to the shaping mode to perform shaping on the one precoding unit in the at least one time-frequency resource, including: for each of the first codebooks a precoding matrix, the terminal uses the first precoding matrix and the different second precoding matrix to perform shaping on the one precoding unit respectively; the terminal performs channel measurement on the shaped time-frequency resource, Determining a channel quality indicator (CQI) corresponding to the time-frequency resource, including: for each first precoding matrix in the first codebook, the terminal performs channel measurement on the shaped time-frequency resource, and determines the M CQI corresponding to the time-frequency resource, M is the number of the first pre-coding matrix in the first codebook; selecting one CQI from the M CQIs is determined as the CQI corresponding to the time-frequency resource; the terminal feeding back the time-frequency Resource corresponding CQI Further comprising: the index information of the selected CQI feedback terminal corresponding to a first precoding matrix.

In a second aspect, a method for receiving channel state information includes: receiving, by a base station, a channel quality indicator (CQI) corresponding to at least one time-frequency resource; and determining, by the base station, a pre-determination in the time-frequency resource when measuring the terminal channel Coding unit assignment The shaping mode used by the shape, wherein the time-frequency resource is divided into one pre-coding unit, and the shaping mode corresponds to a pre-coding matrix group, and the shaping mode represents one pre-coding unit in the time-frequency resource and A mapping relationship between precoding matrices in a precoding matrix group corresponding to the shaping mode, where I is an integer greater than one.

In a possible implementation manner, the one precoding unit is configured to divide the time-frequency resource in a time domain; or the one precoding unit is configured to divide the time-frequency resource in a frequency domain; or the one The precoding unit is obtained by jointly dividing the time-frequency resource in the time domain and the frequency domain.

In a possible implementation, each precoding unit in the one precoding unit includes at least one orthogonal frequency division multiplexing (OFDM) symbol, or at least one physical resource block (PRB); or the one pre Each precoding unit in the coding unit includes at least one subcarrier, or at least one PRB pair; or each of the one precoding units includes at least one resource element (RE).

In a possible implementation, each precoding unit in the one precoding unit includes a group of subcarriers, wherein each subcarrier includes at least one demodulation reference signal (DMRS) symbol.

In a possible implementation manner, the number of the shaping modes is N, N shaping modes, and at least one piece of information in the precoding matrix included in each precoding matrix group corresponding to the shaping mode is pre-agreed, or And being notified by the base station by a semi-static signal or a dynamic signal; or there is a corresponding correspondence between the at least one piece of information and system parameters other than the at least one piece of information; The number I of the precoding units in the at least one time-frequency resource is pre-agreed or notified by the semi-static signal or the dynamic signal after being determined by the base station; or the number I of the pre-coding units in the time-frequency resource and There is a set correspondence between system parameters other than the number of precoding units.

In a possible implementation manner, the base station receives the CQI corresponding to the at least one time-frequency resource, and further includes: the base station receiving the one precoding unit in the time-frequency resource when receiving the terminal channel measurement The index information of the shaping mode used; the base station determines the shaping mode used by the one precoding unit in the time-frequency resource when the terminal channel measures, including: the base station according to the index information, The shaping mode used for forming one precoding unit in the time-frequency resource when determining the terminal channel is determined.

In a possible implementation manner, the shaping mode indicates that, in the time domain, using different precoding matrices in the precoding matrix group corresponding to the shaping mode, performing on one precoding unit in at least one time-frequency resource Forming; or the shaping mode indicates that in the frequency domain, using different precoding matrices in the precoding matrix group corresponding to the shaping mode, forming on the one precoding unit; or the shaping mode indication Performing shaping on the one precoding unit according to different precoding matrices in the precoding matrix group corresponding to the shaping mode according to the order of the first time domain and the frequency domain; or the shaping mode indication according to the pre-frequency domain The order of the post-time domain is shaped on the one pre-coding unit using different pre-coding matrices in the precoding matrix group corresponding to the shaping mode.

In a possible implementation manner, the shaping mode indicates that the same first precoding matrix and a different second precoding matrix are used to perform shaping on the one precoding unit respectively; or The shaping mode indicates that the different first precoding matrices and different second precoding matrices are used to perform shaping on the one precoding unit.

In a possible implementation manner, the base station receives the CQI corresponding to the at least one time-frequency resource, and further includes: the base station receives the index information of the first pre-coding matrix; and the base station determines that the terminal channel measurement is at the time The shaping mode used by the one precoding unit in the frequency resource includes: determining, by the base station, the I in the time-frequency resource according to the index information of the received first precoding matrix The pre-coding unit is shaped by the shaping mode used.

In a third aspect, a computer readable storage medium is provided having stored executable code for implementing the method of the first aspect.

In a fourth aspect, a computer readable storage medium is provided, wherein an executable code is stored, the code being used to implement the method of the second aspect.

In a fifth aspect, a channel state information feedback device includes: a shaping module, configured to use different precoding matrices in a precoding matrix group corresponding to the shaping mode according to the determined shaping mode, at least one time frequency The precoding unit in the resource performs shaping, wherein the time-frequency resource is divided into one precoding unit, and the shaping mode corresponds to a precoding matrix group, and the shaping mode represents one pre-frequency in the time-frequency resource. The mapping relationship between the coding unit and the precoding matrix in the precoding matrix group corresponding to the shaping mode, I is an integer greater than 1; the measurement feedback module is configured to perform channel measurement on the shaped time-frequency resource, The channel quality indicator (CQI) corresponding to the time-frequency resource, and feeding back the CQI corresponding to the time-frequency resource.

In a possible implementation manner, if the number N of the shaping modes is greater than 1, the feedback module is further configured to: feed back index information of the shaping mode.

In a possible implementation manner, the number of the shaping modes is N, N shaping modes, and at least one piece of information in the precoding matrix included in each precoding matrix group corresponding to the shaping mode is pre-agreed or passed Obtained by a semi-static signal or a dynamic signal; or a set correspondence between the at least one piece of information and system parameters other than the at least one piece of information; the number of precoding units in at least one time-frequency resource For a pre-agreed, or obtained by a semi-static signal or a dynamic signal; or there is a corresponding correspondence between the number I of precoding units in the time-frequency resource and the system parameters other than the number of pre-coding units .

In a possible implementation manner, the shaping mode indicates that, in the time domain, using different precoding matrices in the precoding matrix group corresponding to the shaping mode, performing on one precoding unit in at least one time-frequency resource Forming; or the shaping mode indicates that in the frequency domain, using different precoding matrices in the precoding matrix group corresponding to the shaping mode, forming on the one precoding unit; or the shaping mode indication Performing shaping on the one precoding unit according to different precoding matrices in the precoding matrix group corresponding to the shaping mode according to the order of the first time domain and the frequency domain; or the shaping mode indication according to the pre-frequency domain The order of the post-time domain is shaped on the one pre-coding unit using different pre-coding matrices in the precoding matrix group corresponding to the shaping mode.

In a possible implementation manner, the precoding matrix in the precoding matrix group corresponding to the shaping mode is calculated according to a function according to a first precoding matrix in the first codebook and a second precoding matrix in the second codebook. Obtaining; the shaping mode indicates that the same first precoding matrix and the different second precoding matrix are used to perform shaping on the one precoding unit respectively; or the shaping mode indicates that a different first preamble is used Encoding matrix and different second precoding moments Arrays are respectively formed on the one precoding unit.

In a possible implementation manner, if the shaping mode indicates that the same first precoding matrix and the different second precoding matrix are used, respectively forming on the one precoding unit, the shaping module is specifically used For the first precoding matrix in the first codebook, the first precoding matrix and the different second precoding matrix are used to perform shaping on the one precoding unit respectively; the measurement module Specifically, for each first precoding matrix in the first codebook, performing channel measurement on the shaped time-frequency resource, determining M CQIs corresponding to the time-frequency resource, where M is the first code The number of the first precoding matrix is determined by the CQI, and the CQI is determined by the CQI corresponding to the time-frequency resource; the feedback module is further configured to: feed back the first precoding matrix corresponding to the selected CQI Index information.

In a sixth aspect, a channel state information receiving apparatus includes: a receiving module, configured to receive a channel quality indicator (CQI) corresponding to at least one time-frequency resource; and a determining module, configured to determine when the terminal channel is measured at the time The shaping mode used by the one precoding unit in the frequency resource, wherein the time-frequency resource is divided into one pre-coding unit, and the shaping mode corresponds to a pre-coding matrix group, and the shaping mode is characterized A mapping relationship between a precoding unit in a frequency resource and a precoding matrix in a precoding matrix group corresponding to the shaping mode, where I is an integer greater than one.

In a possible implementation manner, the number of the shaping modes is N, N shaping modes, and at least one piece of information in the precoding matrix included in each precoding matrix group corresponding to the shaping mode is pre-agreed or The determining module determines and transmits a semi-static signal or a dynamic signal Or a set correspondence between the at least one piece of information and system parameters other than the at least one piece of information; the number I of the precoding units in the at least one time-frequency resource is pre-agreed or The determining module determines and is notified by a semi-static signal or a dynamic signal; or there is a set correspondence between the number I of precoding units in the time-frequency resource and the system parameter other than the number of pre-coding units.

In a possible implementation manner, the receiving module is further configured to: receive index information of a shaping mode used for forming a precoding unit in the time-frequency resource when the terminal channel is measured; The module is specifically configured to: according to the index information, determine a shaping mode used by the one precoding unit in the time-frequency resource when measuring the terminal channel.

In a possible implementation manner, the shaping mode indicates that, in the time domain, using different precoding matrices in the precoding matrix group corresponding to the shaping mode, performing on one precoding unit in at least one time-frequency resource Forming; or the shaping mode indicates that in the frequency domain, using different precoding matrices in the precoding matrix group corresponding to the shaping mode, forming on the one precoding unit; or the shaping mode indication Performing shaping on the one precoding unit according to different precoding matrices in the precoding matrix group corresponding to the shaping mode according to the order of the first time domain and the frequency domain; or the shaping mode indication according to the pre-frequency domain The order of the post-time domain is shaped on the one pre-coding unit using different pre-coding matrices in the precoding matrix group corresponding to the shaping mode.

In a possible implementation manner, the shaping mode indicates that the same first precoding matrix and a different second precoding matrix are used to perform shaping on the one precoding unit respectively; Or the shaping mode indicates that different first precoding matrices and different second precoding matrices are used to perform shaping on the one precoding unit respectively.

In a possible implementation manner, the receiving module is further configured to: receive index information of the first precoding matrix; the determining module is specifically configured to: determine, according to the index information of the received first precoding matrix, the terminal The shaping mode used by the one precoding unit in the time-frequency resource during channel measurement.

In a seventh aspect, a terminal is provided, including: a transceiver, and at least one processor connected to the transceiver, wherein: the processor is configured to read a program in the memory, and perform the following process: according to the determined shape The mode performs shaping on a precoding unit in at least one time-frequency resource by using different precoding matrices in the precoding matrix group corresponding to the shaping mode, where the time-frequency resource is divided into one pre-coding unit The shaping mode corresponds to a precoding matrix group, and the shaping mode represents a mapping relationship between a precoding unit in the time-frequency resource and a precoding matrix in the precoding matrix group corresponding to the shaping mode, where An integer greater than one; performing channel measurement on the shaped time-frequency resource to obtain a channel quality indicator (CQI) corresponding to the time-frequency resource; controlling the transceiver to feed back the CQI corresponding to the time-frequency resource; and the transceiver is configured to Receive and send data under the control of the processor.

In a possible implementation manner, if the number N of the shaping modes is greater than 1, the processor reads the program in the memory, and further performs: feeding back index information of the shaping mode.

In a possible implementation manner, if the shaping mode indicates that the same first is used a precoding matrix and a different second precoding matrix are respectively shaped on the one precoding unit, and the processor reads the program in the memory, and specifically executes: for each of the first codebooks a first precoding matrix, using the first precoding matrix and a different second precoding matrix, respectively performing shaping on the one precoding unit; for each first precoding matrix in the first codebook And performing channel measurement on the time-frequency resource after the shaping, determining M CQIs corresponding to the time-frequency resource, where M is the number of the first pre-coding matrix in the first codebook; and selecting one CQI from the M CQIs Determining a CQI corresponding to the time-frequency resource; controlling the transceiver to feed back index information of the first pre-coding matrix corresponding to the selected CQI.

In an eighth aspect, a base station is provided, including: a transceiver, and at least one processor connected to the transceiver, wherein: the processor is configured to read a program in the memory, and execute the following process: through the transceiver Receiving a channel quality indicator (CQI) corresponding to at least one time-frequency resource; determining a shaping mode used by the one precoding unit in the time-frequency resource when measuring the terminal channel, where the time-frequency resource is used Divided into one precoding unit, the shaping mode corresponds to a precoding matrix group, and the shaping mode represents a precoding matrix in a precoding matrix group corresponding to the shaping mode of the I precoding unit in the time-frequency resource. The mapping relationship between I and I is an integer greater than one; the transceiver is configured to receive and transmit data under the control of the processor.

In a possible implementation manner, the number of the shaping modes is N, N shaping modes, and at least one piece of information in the precoding matrix included in each precoding matrix group corresponding to the shaping mode is pre-agreed or The processor determines and is notified by a semi-static signal or a dynamic signal; or there is a set correspondence between the at least one piece of information and system parameters other than the at least one piece of information; The number I of precoding units in at least one time-frequency resource is pre-agreed or notified by the processor through a semi-static signal or a dynamic signal; or the number I of precoding units in the time-frequency resource is divided There is a set correspondence between system parameters other than the number of precoding units.

In a possible implementation manner, the processor reads a program in the memory, and specifically executes: Receiving, by the transceiver, index information indicating a shaping mode used for forming one precoding unit in the time-frequency resource when the terminal channel is measured; Based on the index information, the shaping mode used by the one precoding unit in the time-frequency resource when determining the terminal channel is determined.

In a possible implementation manner, the processor reads a program in the memory, and specifically executes: Receiving, by the transceiver, index information of the first precoding matrix; And determining, according to the received index information of the first precoding matrix, a shaping mode used by the one precoding unit in the time-frequency resource when measuring the terminal channel.

In the method and apparatus provided by the embodiment of the present invention, the terminal performs shaping on one precoding unit in at least one time-frequency resource by using different precoding matrices in the precoding matrix group corresponding to the determined shaping mode; The shaped time-frequency resource performs channel measurement, obtains a channel quality indicator (CQI) corresponding to the time-frequency resource, and feeds back the CQI corresponding to the time-frequency resource. In the embodiment of the present invention, one time-frequency resource is divided into one pre-coding unit, and different pre-coding units in the time-frequency resource are shaped by different pre-coding matrices, that is, multiple different time-frequency resources are used. The precoding matrix is shaped, and the channel is averaged by multiple precoding matrices, even if the channel changes in the time domain, since the CQI is measured by the terminal traversing different precoding matrices. Therefore, the CQI can still accurately reflect the actual condition of the channel. In the scene of high-speed scene or other channels unstable, the feedback time delay has little effect and improves the system robustness.

S11-S13, S41-S42‧‧‧ steps

V1-V4‧‧‧ precoding matrix

51‧‧‧Shaping module

52‧‧‧Measurement module

53‧‧‧Reward module

61‧‧‧ receiving module

62‧‧‧Determining modules

71‧‧‧ transceiver

72‧‧‧ processor

73‧‧‧ memory

74‧‧‧User interface

81‧‧‧ transceiver

82‧‧‧ Processor

83‧‧‧ memory

1 is a schematic diagram of a channel state information feedback method according to an embodiment of the present invention; FIG. 2 is a schematic diagram of a shaping mode provided in an embodiment of the present invention; FIG. 3 is another shape provided in an embodiment of the present invention. FIG. 4 is a schematic diagram of a channel state information feedback device according to an embodiment of the present invention; FIG. 5 is a schematic diagram of a channel state information feedback device according to an embodiment of the present invention; A schematic diagram of a channel state information receiving device; FIG. 7 is a schematic diagram of a terminal according to an embodiment of the present invention; FIG. 8 is a schematic diagram of a base station according to an embodiment of the present invention.

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It is to be understood that the embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The embodiment of the invention provides a channel state information feedback party on the terminal side. As shown in FIG. 1 , the method includes: S11. The terminal uses, according to the determined shaping mode, different precoding matrices in the precoding matrix group corresponding to the shaping mode, and at least one of the at least one time-frequency resource. The precoding unit (English: precoding units) performs shaping, wherein the time-frequency resource is divided into one pre-coding unit, and the shaping mode represents that one pre-coding unit in the time-frequency resource corresponds to the shaping mode. A mapping relationship between precoding matrices in a precoding matrix group, where I is an integer greater than one.

In this step, one time-frequency resource is divided into one pre-coding unit, and the terminal uses different pre-coding matrices to perform shaping on different pre-coding units according to the determined shaping mode.

In the embodiment of the present invention, each of the shaping modes corresponds to a precoding matrix group, and is denoted by V={V ₁ , V ₂ , . . . , V _M }, where M represents a precoding matrix included in the precoding matrix group. If the number of N shaping modes is greater than 1, different shaping modes may correspond to the same precoding matrix group, or may correspond to different precoding matrix groups; if the number of shaping modes N is greater than 1, different The shaping mode may correspond to different precoding matrix groups, and the mapping relationship between the one precoding unit in the characterized time-frequency resource and the precoding matrix in the precoding matrix group corresponding to the shaping mode is the same; The shaping mode may also correspond to the same precoding matrix group, and the mapping relationship between the one precoding unit in the characterized time-frequency resource and the precoding matrix in the precoding matrix group corresponding to the shaping mode is different; The shaping mode may also correspond to different precoding matrix groups, and the mapping relationship between the one precoding unit in the characterized time-frequency resource and the precoding matrix in the precoding matrix group corresponding to the shaping mode is different.

Optionally, the number I of the precoding units in the at least one time-frequency resource is pre-agreed or obtained through a semi-static signal or a dynamic signal; or a pre-frequency resource There is a set correspondence between the number I of coding units and system parameters other than the number of precoding units.

For example, the network side (such as the base station) dynamically divides the time-frequency resources, and notifies the terminal of the number I of the pre-coding units included in the divided time-frequency resources by using a semi-static signal or a dynamic signal.

For example, different subframes correspond to different numbers I, and the number I of precoding units included in the time-frequency resource may be determined according to the subframe where the time-frequency resource is located.

Optionally, the location of the at least one time-frequency resource may be pre-agreed or obtained by a semi-static signal or a dynamic signal; or between the location of the time-frequency resource and the system parameter that need to be shaped according to the shaping mode There is a corresponding correspondence set.

For example, the network side (such as a base station) selects a time-frequency resource that needs to be shaped according to the shaping mode, and notifies the terminal of the location of the selected time-frequency resource by a semi-static signal or a dynamic signal.

For example, the time-frequency resource corresponding to the preset subframe 0 needs to be shaped according to the shaping mode, or the time-frequency resource corresponding to the carrier 1 needs to be shaped according to the shaping mode, and the like.

S12. The terminal performs channel measurement on the shaped time-frequency resource to obtain a CQI corresponding to the time-frequency resource. S13: The terminal feeds back the CQI corresponding to the time-frequency resource.

Specifically, each time-frequency resource in the at least one time-frequency resource corresponds to one CQI.

In the embodiment of the present invention, the terminal uses the precoding moment corresponding to the determined shaping mode. Different precoding matrices in the array are shaped on one precoding unit in at least one time-frequency resource; channel-measurement is performed on the shaped time-frequency resource to obtain a channel quality indicator corresponding to the time-frequency resource ( CQI), and feedback the CQI corresponding to the time-frequency resource. In the embodiment of the present invention, one time-frequency resource is divided into one pre-coding unit, and different pre-coding units in the time-frequency resource are shaped by different pre-coding matrices, that is, multiple different time-frequency resources are used. The precoding matrix is shaped, and the channel is averaged by multiple precoding matrices. Even if the channel changes in the time domain, since the CQI is measured by the terminal traversing different precoding matrices, the CQI can still be accurate. Reflecting the actual condition of the channel, in the high-speed scene or other unstable channels, the feedback time delay has little effect, which improves the system robustness.

In the embodiment of the present invention, the first precoding unit included in the time-frequency resource includes the following three optional division manners: mode 1: the first precoding unit divides the time-frequency resource in the time domain. owned.

In this manner, a possible implementation manner is that each precoding unit in the one precoding unit includes at least one Orthogonal Frequency Division Multiplex (OFDM) symbol.

Optionally, each precoding unit in the one precoding unit may include the same number of OFDM symbols, or may be different.

Optionally, if each precoding unit includes at least two OFDM symbols, the at least two OFDM symbols may be consecutive OFDM symbols, or may be discontinuous OFDM symbols.

For example, in the LTE system, a subframe in the LTE system includes 14 OFDM symbols, and at least 11 OFDM symbols are used for data transmission. The OFDM symbols may be divided into different OFDM symbol groups, each OFDM symbol group includes at least one OFDM symbol, and different OFDM symbol groups correspond to different precoding matrices in the precoding matrix group V, ie, V. The precoding matrix is looped through in different OFDM symbol groups. For example, an OFDM symbol group includes an OFDM symbol, and V={V ₁ , V ₂ , V ₃ , V ₄ }, then symbol1 corresponds to V ₁ , symbol 2 corresponds to V ₂ , symbol 3 corresponds to V ₃ , and symbol 4 corresponds to V ₄ . symbol5 corresponding to V _1, symbol6 corresponding to V _2, symbol7 corresponding to V _3, and so on, as shown in FIG.

Another possible implementation manner is that each precoding unit in the one precoding unit includes at least one physical resource block (PRB).

Optionally, each of the precoding units in the one precoding unit may include the same number of PRBs.

Optionally, if each precoding unit includes at least two PRBs, the at least two PRBs may be consecutive PRBs in the time domain, or may be PRBs that are discontinuous in the time domain.

Manner 2: The I precoding unit is obtained by dividing the time-frequency resource in a frequency domain.

In this manner, a possible implementation manner is that each precoding unit in the one precoding unit includes at least one subcarrier.

Optionally, each of the precoding units in the one precoding unit may include the same number of subcarriers, or may be different.

Optionally, if each precoding unit includes at least two subcarriers, the at least two subcarriers may be consecutive subcarriers or may be discontinuous subcarriers.

Optionally, each precoding unit in the one precoding unit includes a group of sub Carrier, wherein each subcarrier includes a Demodulation Reference Signal (DMRS) symbol.

For example, the LTE system is still used as an example. In a LTE system, a PRB includes 12 subcarriers. The subcarriers can be divided into different subcarrier groups. Each subcarrier group includes at least one subcarrier, and is different. The subcarrier groups correspond to different precoding matrices in the precoding matrix group V, that is, the precoding matrix in V circulates in different subcarrier groups. For example, one subcarrier group includes one subcarrier, and V={V ₁ , V ₂ , V ₃ , V ₄ }, subcarrier1 corresponds to V ₁ , subcarrier2 corresponds to V ₂ , subcarrier3 corresponds to V ₃ , subcarrier ₄ corresponds to V ₄ , subcarrier ₅ . Corresponding to V ₁ , subcarrier 6 corresponds to V ₂ , subcarrier 7 corresponds to V ₃ , and so on, as shown in FIG. 3 .

Another possible implementation manner is that each precoding unit in the one precoding unit includes at least one PRB pair.

Optionally, each of the precoding units in the one precoding unit may include the same number of PRB pairs, or may be different.

Optionally, if each precoding unit includes at least two PRB pairs, the at least two PRB pairs may be consecutive PRB pairs in the frequency domain, or may be discontinuous PRB pairs in the frequency domain.

Manner 3: The I precoding unit is jointly divided by the at least one time-frequency resource in a time domain and a frequency domain.

In this manner, each precoding unit in the one precoding unit includes at least one resource element (Resource Element, RE).

Optionally, each of the precoding units in the one precoding unit may include the same number of REs.

Optionally, if each precoding unit includes at least two REs, the at least two REs may be consecutive REs in the frequency domain and the time frequency, or may be continuous in the frequency domain and discontinuous in time and frequency. The RE may also be a RE that is discontinuous in the frequency domain and continuous in time-frequency, and may also be an RE that is discontinuous in both the frequency domain and the time domain.

In the embodiment of the present invention, when the terminal performs the channel measurement, the different precoding units included in one time-frequency resource are shaped by using different precoding matrices in the precoding matrix group corresponding to the shaping mode determined by the terminal, and the process is performed. In the polling mode (English: precoding cycle or precoder cycling, that is, precoding matrix round robin). Assuming that a particular time-frequency resource is divided into I>1 precoding units in total, the received signal on the i-th pre-coding unit is expressed as: y _i = H _i V _{Ω( i )} x _i ; where H _i is The channel matrix of the i-th precoding unit (the size is Nt x Nr, Nt is the number of transmitting antennas, Nr is the number of receiving antennas), and x _i is the unshaped signal transmitted on the i-th precoding unit (may be a channel) Status information reference signal (CSI-RS), or data signal), V ( i ) is the corresponding precoding matrix on the ith precoding unit, V ( i )= V _{Ω( i )} V ={ V ₁ , V ₂ ,... V _M }, Ω( i ) is a mapping function, indicating 1 i Mapping relationship I M precoding unit precoding matrix. Optionally, Ω( i ) represents an index of a corresponding precoding matrix on the i th precoding unit.

In the embodiment of the present invention, if the number N of the shaping modes is greater than 1, in a possible implementation manner, before S11, the method further includes: the terminal determining an shaping mode from the N shaping modes.

Correspondingly, the terminal in the S13 feeds back the CQI corresponding to the time-frequency resource, and further includes: the terminal feeding back the indication information used to indicate the shaping mode.

Specifically, if there is only one shaping mode, that is, N=1, the terminal and the network side have the same understanding of the shaping mode, so the terminal only needs to perform CQI feedback in the shaping mode, and no feedback is needed to indicate the mode. The indication information of the shaping mode does not need to feed back the related information of the precoding matrix group corresponding to the shaping mode. If there are multiple shaping modes, that is, N>1, the UE may determine one shaping mode in the N shaping modes, perform CQI feedback in the determined shaping mode, and feedback the CQI while feeding back Forming mode.

The indication information used by the terminal to indicate the shaping mode is recorded as a Precoding Mapping Indicator (PMAI).

Based on any of the foregoing embodiments, the shaping mode in the embodiment of the present invention includes the following four implementation manners: mode 1, the shaping mode indicates that in the time domain, different precoding matrix groups corresponding to the shaping mode are used. The precoding matrix is shaped on one of the precoding units in the at least one time-frequency resource.

In this manner, S12 is specifically: the terminal performs shaping on one precoding unit in at least one time-frequency resource by using different precoding matrices in the precoding matrix group corresponding to the shaping mode in the time domain. .

In the mode 2, the shaping mode indicates that in the frequency domain, different precoding matrices in the precoding matrix group corresponding to the shaping mode are used, and shaping is performed on the one precoding unit.

In this manner, S12 is specifically: the terminal performs shaping on one precoding unit in at least one time-frequency resource by using different precoding matrices in the precoding matrix group corresponding to the shaping mode in the frequency domain. .

In the mode 3, the shaping mode indicates that the frequency domain is used in the order of the first time domain and the frequency domain. The different precoding matrices in the precoding matrix group corresponding to the shaping mode are shaped on the one precoding unit.

In this manner, S12 is specifically: the terminal uses one precoding in at least one time-frequency resource according to different precoding matrices in the precoding matrix group corresponding to the shaping mode according to the order of the first time domain and the frequency domain. Forming on the unit.

In the mode 4, the shaping mode indicates that the different precoding matrices in the precoding matrix group corresponding to the shaping mode are used in the order of the pre-frequency domain and the time domain, and the forming is performed on the one precoding unit.

In this manner, S12 is specifically: the terminal uses one precoding in at least one time-frequency resource according to different precoding matrices in the precoding matrix group corresponding to the shaping mode according to the order of the time domain in the pre-frequency domain. Forming on the unit.

Based on any of the foregoing embodiments, the number of the shaping modes is N, N shaping modes, and at least one piece of information in the precoding matrix included in each precoding matrix group corresponding to the shaping mode may be pre-agreed, It can be obtained by semi-static signals or dynamic signals.

Specifically, the network side (such as an eNB) may determine the number of the shaping modes N, N shaping modes, or each shaping according to the operating conditions of the system, such as the channel status, the antenna configuration, the moving speed of the terminal, and the like. The precoding matrix included in the precoding matrix group corresponding to the mode is notified to the terminal by a dynamic signal or a semi-static signal.

For example, if the pre-set Nt size codebook includes L precoding matrices, the network side may select M precoding matrices from the L precoding matrices, and determine the set formed by the selected precoding matrices as The V mode corresponds to the V, and the Mlog2 (L) bit is used to notify the terminal of the index of the selected precoding matrix in the codebook. As another example There are K possible precoding matrix groups in the preset Nt size codebook. Then, the network side can select a precoding matrix group from the K precoding matrix groups as the V corresponding to the shaping mode, and pass log2. (K) A bit that notifies the terminal of the index of the selected precoding matrix group in the codebook.

Based on any of the foregoing embodiments, optionally, the precoding matrix in the precoding matrix group corresponding to the shaping mode is obtained by performing a function operation on a precoding matrix in at least two preset codebooks.

Specifically, it is assumed that the M precoding matrices in the precoding matrix group V corresponding to the shaping mode constitute a composite codebook, and the composite codebook is generated by a plurality of component codebooks, that is, composite The codebook can be expressed as V=f(W ₁ , W ₂ , . . . , W _S ), where V represents a composite codebook of size N _t×r , r is the rank of the composite codebook, W ₁ , W ₂ ,..., W _S is S component codebook, and f( ) represents a function that generates a composite codebook from the component codebook.

The precoding matrix in the precoding matrix group corresponding to the shaping mode is obtained by performing a function operation according to the first precoding matrix in the first codebook and the second precoding matrix in the second codebook. Description.

The shaping mode in the embodiment of the present invention further includes the following two possible implementation manners: mode A, the shaping mode indication uses the same first precoding matrix and different second precoding matrix, respectively, in the I pre Forming on the coding unit.

Specifically, the instruction is traversed in a component codebook when the shaping is performed, and is not traversed in other component codebooks.

In this manner, S12 further includes the following two possible implementation manners: mode A1, the terminal uses the specified first precoding matrix and a different second precoding matrix to perform shaping on the one precoding unit.

For example, taking the 8-antenna codebook in the LTE system as an example, the precoding matrix group V corresponding to the shaping mode is represented as V=W ₁ ×W ₂ , where W ₁ is a broadband component codebook, and W ₂ is a narrowband component. Codebook. Here, 8Tx is only an example. For other antenna configurations and codebook configurations, the solutions provided by the embodiments of the present invention are equally applicable. When the terminal performs shaping, a fixed precoding matrix is used in the first codebook W1, and traversal is performed in the second codebook W2. All precoding units in the real-time resource correspond to the same first precoding matrix (ie, a precoding matrix in the first codebook, also referred to as a first codeword), and each precoding in the time-frequency resource The corresponding precoding matrix (ie, the precoding matrix in the second codebook, also referred to as the second codeword) is traversed, and the precoding matrix corresponding to the i th precoding unit can be represented as V ( i )= V _{Ω( i )} = W ₁ W _{2,Ω( i )} ,1 i I. The terminal performs shaping on the one precoding unit in the time-frequency resource, then calculates the CQI of the time-frequency resource, and returns the CQI.

Optionally, the specified first precoding matrix is preset, or is obtained by a semi-static signal or a dynamic signal, or is determined by the terminal. If the first precoding matrix used is determined by the terminal, the index information of the first precoding matrix used in the first codebook needs to be fed back.

The method A2: For each first precoding matrix in the first codebook, the terminal uses the first precoding matrix and the different second precoding matrix to perform shaping on the one precoding unit respectively; For each of the first precoding matrices in the first codebook, the terminal pairs the time and frequency after shaping The source performs channel measurement, and determines M CQIs corresponding to the time-frequency resource, where M is the number of the first pre-coding matrix in the first codebook; and selecting one CQI from the M CQIs to determine that the time-frequency resource corresponds to CQI.

Specifically, if the first codebook W ₁ includes K ₁ first precoding matrices, that is, W ₁ ={ W ₁₁ , W ₁₂ ,..., }, the second codebook W ₂ includes K ₂ second precoding matrices, that is, W ₂ ={ W ₂₁ , W ₂₂ ,..., }. For the first codebook W ₁ in a first arbitrary precoding matrix, the terminal I precoding unit precoding unit on each, all have to traverse the first code in the second precoding matrix W ₂ for the present The shaping, that is, the shaping on the i-th precoding unit in the time-frequency resource can be expressed as: V ( i )= W ₁ W _{2, Ω( i )} , and the CQI of the time-frequency resource is calculated.

For example, it is assumed that the time-frequency resource is divided into two precoding units, and the first codebook includes two first precoding matrices, denoted as W ₁₁ , W ₁₂ , and the second codebook includes two second precoding matrices. , expressed as W ₂₁ , W ₂₂ . Then, for the first precoding unit, the terminal performs shaping using W ₁₁ ×W ₂₁ , W ₁₁ ×W ₂₁ , W ₂₁ ×W ₂₁ , and W ₂₁ ×W ₂₂ respectively; for the second precoding unit, the terminal separately Forming is performed using W ₁₁ × W ₂₁ , W ₁₁ × W ₂₁ , W ₂₁ × W ₂₁ , and W ₂₁ × W ₂₂ .

In this manner, the terminal feeds back the CQI corresponding to the time-frequency resource, and further includes: the terminal feeding back the index information of the first pre-coding matrix corresponding to the selected CQI, so that the base station side can obtain the first pre-selected by the terminal. Encoding matrix.

In the mode B, the shaping mode indicates that the first precoding matrix and the different second precoding matrix are used to perform shaping on the one precoding unit.

Specifically, it indicates that all component codebooks are used for shaping. Perform traversal. That is, the terminal uses different first precoding matrices and different second precoding matrices to perform shaping on the one precoding unit.

Correspondingly, when the terminal performs shaping on different precoding units in the time-frequency resource, the precoding matrix corresponding to each precoding unit is represented as V ( i )= W _{1, Ω1( i )} W _{2, Ω2 ( i )} , where W _{1, Ω1( i )} represents a first precoding matrix corresponding to the i th precoding unit, and W _{2, Ω2( i )} represents a second precoding matrix corresponding to the i th precoding unit, Ω1 ( i ) indicating a mapping relationship between precoding units different from the time-frequency resources on the first precoding matrix in the first codebook, and Ω2( i ) indicating the second precoding matrix in the second codebook Mapping relationship between different precoding units in time-frequency resources.

For example, it is assumed that the time-frequency resource is divided into four pre-coding units, and the first codebook includes two first pre-coding matrices, denoted as W ₁₁ , W ₁₂ , and the second codebook includes two second pre-coding matrices. , expressed as W ₂₁ , W ₂₂ . Then: the terminal can shape the first precoding unit by using W ₁₁ ×W ₂₁ , and shape the second precoding unit by using W ₁₁ ×W ₂₂ , and use the W ₂₁ ×W ₂₁ pair of the third precoding. The unit is shaped and the fourth pre-coding unit is shaped using W ₂₁ × W ₂₂ .

Based on the same inventive concept, the embodiment of the present invention further provides a channel state information receiving method on the base station side. For the same part as the terminal side, refer to the related description in the embodiment shown in FIG. 1 , and details are not described herein again. As shown in FIG. 4, the method includes: S41: A base station receives a CQI corresponding to at least one time-frequency resource; S42, the base station determines a pre-coding unit forming station in the time-frequency resource when measuring a terminal channel The shaping mode used, wherein the time-frequency resource is divided into one precoding unit, and the shaping mode represents precoding in a precoding matrix group corresponding to the shaping mode of the one precoding unit in the time-frequency resource The mapping relationship between matrices, I is an integer greater than one.

In a possible implementation manner, the number of the shaping modes is N, N shaping modes, and at least one piece of information in the precoding matrix included in each precoding matrix group corresponding to the shaping mode is pre-agreed, or And being notified by the base station to be notified by a semi-static signal or a dynamic signal; or there is a set correspondence between the at least one piece of information and system parameters other than the at least one piece of information; at least one of the time-frequency resources The number I of coding units is pre-agreed or notified by the semi-static signal or dynamic signal after being determined by the base station; or the number I of pre-coding units in the time-frequency resource and the number of pre-coding units There is a corresponding correspondence between the external system parameters.

In a possible implementation manner, the base station receives the CQI corresponding to the at least one time-frequency resource, and further includes: the base station receives one precoding unit forming station in the time-frequency resource for indicating the terminal channel measurement The index information of the shaping mode used; the base station determines the shaping mode used by the one precoding unit in the time-frequency resource when the terminal channel measures, including: the base station determines according to the index information The shaping mode used by the one precoding unit in the time-frequency resource when the terminal channel is measured.

In a possible implementation manner, the base station receives the CQI corresponding to the at least one time-frequency resource, and further includes: the base station receives the index information of the first pre-coding matrix; and the base station determines that the terminal channel measurement is at the time The shaping mode used by the one precoding unit in the frequency resource includes: determining, by the base station, the I in the time-frequency resource according to the index information of the received first precoding matrix The pre-coding unit is shaped by the shaping mode used.

Based on any of the foregoing embodiments, after S42, the method further includes: the base station selects a shaping mode from the N shaping modes; and the base station uses the precoding corresponding to the shaping mode according to the shaping mode The different precoding matrices in the matrix group shape the downlink data transmitted on the I precoding units in the at least one time-frequency resource.

Optionally, the base station uses, according to the shaping mode, the downlink data transmitted on the one precoding unit of the at least one time-frequency resource by using different precoding matrices in the precoding matrix group corresponding to the shaping mode, And performing the shaping, the base station, in the time domain, using different precoding matrices in the precoding matrix group corresponding to the shaping mode, and assigning the data transmitted on the one precoding unit included in the time-frequency resource Or the base station in the frequency domain, using different precoding matrices in the precoding matrix group corresponding to the shaping mode, shaping the data transmitted on the one precoding unit included in the time-frequency resource; or The base station performs shaping on the data transmitted by the I precoding unit included in the time-frequency resource by using different precoding matrices in the precoding matrix group corresponding to the shaping mode according to the order of the first-order domain and the frequency domain. Or the base station uploads the I precoding units included in the time-frequency resource by using different precoding matrices in the precoding matrix group corresponding to the shaping mode according to the order of the time domain in the first frequency domain. The data were shaped.

Optionally, the precoding matrix in the precoding matrix group corresponding to the shaping mode is based on the first precoding matrix in the first codebook and the second precoding matrix in the second codebook. Obtaining, by the base station, the downlink data transmitted on the one precoding unit of the at least one time-frequency resource according to the shaping mode, using different precoding matrices in the precoding matrix group corresponding to the shaping mode And performing the shaping, comprising: the base station using the same first precoding matrix and different second precoding matrices, respectively shaping the data transmitted on the one precoding unit included in the time-frequency resource; or The base station uses different first precoding matrices and different second precoding matrices to respectively shape the data transmitted on the one precoding unit included in the time-frequency resource.

Optionally, the method further includes: the base station notifying the base station of the selected shaping mode by using a downlink signal.

Specifically, if there is only one shaping mode, that is, N=1, the base station adopts the same shaping mode used by the CQI feedback corresponding to the time-frequency resource, and the one precoding unit included in the time-frequency resource. The data transmitted on the shape is shaped; if there are multiple shaping modes, that is, N>1, the base station can obtain the information according to the CQI corresponding to the time-frequency resource, and integrate the antenna configuration, the moving speed of the terminal, and the like from the N shapes. In the mode, a shaping mode is selected, and the selected shaping mode may have the same or different shaping mode as the CQI feedback corresponding to the time-frequency resource.

Optionally, the base station may notify, by using a downlink signal, indication information indicating a shaping mode selected by the base station for data transmission.

For example, the base station uses a 1-bit signal to notify whether the data is shaped using the shaping mode used by the CQI feedback corresponding to the time-frequency resource, and 1 represents that the eNB uses the shape used by the CQI feedback corresponding to the time-frequency resource. The mode shapes the data, and 0 means the eNB is not used. The shaping mode used by the CQI feedback corresponding to the time-frequency resource shapes the data.

For another example, the base station notifies the indication information indicating the shaping mode selected by the base station for data transmission by the log 2 (N) bit signal.

The above method processing flow can be implemented by a software program, which can be stored in a storage medium, and when the stored software program is called, the above method steps are performed.

Based on the same inventive concept, the embodiment of the present invention further provides a channel state information feedback device. As shown in FIG. 5, the device includes: a shaping module 51, configured to use the shaping mode according to the determined shaping mode. The different precoding matrices in the precoding matrix group are shaped on the precoding unit in the at least one time-frequency resource, wherein the time-frequency resource is divided into one pre-coding unit, and the shaping mode corresponds to one pre-coding a coding matrix group, the mapping mode represents a mapping relationship between a precoding unit in the time-frequency resource and a precoding matrix in the precoding matrix group corresponding to the shaping mode, where I is an integer greater than 1; the measurement module The channel quality indicator (CQI) corresponding to the time-frequency resource is obtained, and the feedback module 53 is configured to feed back the CQI corresponding to the time-frequency resource.

In a possible implementation manner, if the number N of the shaping modes is greater than 1, the feedback module is further configured to: feed back index information of the shaping mode.

In a possible implementation manner, the number of the shaping modes is N, N shaping modes, and at least one piece of information in the precoding matrix included in each precoding matrix group corresponding to the shaping mode is pre-agreed or passed Obtained by a semi-static signal or a dynamic signal; or a set correspondence between the at least one piece of information and system parameters other than the at least one piece of information; the number of precoding units in at least one time-frequency resource For pre-agreed, or by half The static signal or the dynamic signal is acquired; or there is a set correspondence between the number I of precoding units in the time-frequency resource and the system parameter other than the number of pre-coding units.

In a possible implementation manner, the shaping mode indicates that, in the time domain, using different precoding matrices in the precoding matrix group corresponding to the shaping mode, performing on one precoding unit in at least one time-frequency resource Forming; or the shaping mode indicates that in the frequency domain, using different precoding matrices in the precoding matrix group corresponding to the shaping mode, forming on the one precoding unit; or the shaping mode indication Performing shaping on the one precoding unit according to different precoding matrices in the precoding matrix group corresponding to the shaping mode according to the order of the first time domain and the frequency domain; or the shaping mode indication according to the pre-frequency domain The order of the post-time domain is shaped on the one pre-coding unit using different pre-coding matrices in the precoding matrix group corresponding to the shaping mode.

In a possible implementation manner, the precoding matrix in the precoding matrix group corresponding to the shaping mode is calculated according to a function according to a first precoding matrix in the first codebook and a second precoding matrix in the second codebook. Obtaining; the shaping mode indicates that the same first precoding matrix and the different second precoding matrix are used to perform shaping on the one precoding unit respectively; or the shaping mode indicates that a different first preamble is used The coding matrix and the different second precoding matrix are respectively shaped on the one precoding unit.

In a possible implementation manner, if the shaping mode indicates that the same first precoding matrix and the different second precoding matrix are used, respectively forming on the one precoding unit, the shaping module is specifically used And: for each first precoding matrix in the first codebook, using the first precoding matrix and a different second precoding matrix, respectively, on the one precoding unit The measuring module is configured to: perform channel measurement on the shaped time-frequency resource for each first pre-coding matrix in the first codebook, and determine M CQIs corresponding to the time-frequency resource. M is the number of the first precoding matrix in the first codebook; selecting one CQI from the M CQIs is determined as the CQI corresponding to the time-frequency resource; the feedback module is further configured to: feed back the selected CQI corresponding The index information of the first precoding matrix.

Based on the same inventive concept, the embodiment of the present invention further provides a channel state information receiving device. As shown in FIG. 6, the device includes: a receiving module 61, configured to receive a channel quality indicator (CQI) corresponding to at least one time-frequency resource. a determining module 62, configured to determine a shaping mode used by the one precoding unit in the time-frequency resource when the terminal channel is measured, wherein the time-frequency resource is divided into one pre-coding unit The shaping mode corresponds to a precoding matrix group, and the shaping mode represents a mapping relationship between a precoding unit in the time-frequency resource and a precoding matrix in the precoding matrix group corresponding to the shaping mode, where An integer greater than one.

In a possible implementation manner, the number of the shaping modes is N, N shaping modes, and at least one piece of information in the precoding matrix included in each precoding matrix group corresponding to the shaping mode is pre-agreed or The determining module determines and is notified by a semi-static signal or a dynamic signal; or a set correspondence between the at least one piece of information and system parameters other than the at least one piece of information; at least one pre-frequency resource The number I of coding units is pre-agreed or The fixed module determines and is notified by a semi-static signal or a dynamic signal; or there is a set correspondence between the number I of precoding units in the time-frequency resource and the system parameter other than the number of pre-coding units.

In a possible implementation manner, the receiving module is further configured to: receive index information of a shaping mode used for forming a precoding unit in the time-frequency resource when the terminal channel is measured; The module is specifically configured to: according to the index information, determine a shaping mode used by the one precoding unit in the time-frequency resource when measuring the terminal channel.

In a possible implementation manner, the shaping mode indicates that, in the time domain, using different precoding matrices in the precoding matrix group corresponding to the shaping mode, performing on one precoding unit in at least one time-frequency resource Forming; or the shaping mode indicates that in the frequency domain, using different precoding matrices in the precoding matrix group corresponding to the shaping mode, forming on the one precoding unit; or the shaping mode indication Performing shaping on the one precoding unit according to different precoding matrices in the precoding matrix group corresponding to the shaping mode according to the order of the first time domain and the frequency domain; or the shaping mode indication according to the pre-frequency domain The order of the post-time domain is shaped on the one pre-coding unit using different pre-coding matrices in the precoding matrix group corresponding to the shaping mode.

In a possible implementation manner, the shaping mode indicates that the same first precoding matrix and the different second precoding matrix are used to perform shaping on the one precoding unit respectively; or the shaping mode indicates different use The first precoding matrix and the different second precoding matrix are respectively shaped on the one precoding unit.

In a possible implementation manner, the receiving module is further configured to: receive index information of the first precoding matrix; the determining module is specifically configured to: determine, according to the index information of the received first precoding matrix, the terminal The shaping mode used by the one precoding unit in the time-frequency resource during channel measurement.

Based on the same inventive concept, the embodiment of the present invention further provides a terminal, which is the same as the above-mentioned channel state information feedback method in the embodiment, and the related description in the embodiment shown in FIG. Narration. As shown in FIG. 7, the terminal includes: a transceiver 71, and at least one processor 72 connected to the transceiver 71. The processor 72 is configured to read a program in the memory 73 and perform the following process: Determining the shaping mode, using different precoding matrices in the precoding matrix group corresponding to the shaping mode, performing shaping on a precoding unit in at least one time-frequency resource, wherein the time-frequency resource is divided into I a precoding unit, the shaping mode corresponding to a precoding matrix group, the shaping mode characterizing a mapping between a precoding unit in a time-frequency resource and a precoding matrix in a precoding matrix group corresponding to the shaping mode Relationship, I is an integer greater than 1; channel measurement is performed on the shaped time-frequency resource, and a channel quality indicator (CQI) corresponding to the time-frequency resource is obtained; and the transceiver is controlled to feed back the CQI corresponding to the time-frequency resource; the transceiver 71, for receiving and transmitting data under the control of the processor 72.

In FIG. 7, the bus bar architecture may include any number of interconnected bus bars and bridges, specifically connected by one or more processors represented by the processor 72 and various circuits of the memory represented by the memory 73. . The busbar architecture also links various other circuits such as peripherals, voltage regulators, and power management circuits. It is well known and, therefore, will not be further described herein. The bus interface provides an interface. Transceiver 71 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium. For different user devices, the user interface 74 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

The processor 72 is responsible for managing the bus bar architecture and the usual processing, and the memory 73 can store the data used by the processor 72 in performing the operations.

In a possible implementation manner, if the number N of the shaping modes is greater than 1, the processor reads the program in the memory, and further performs: controlling the transceiver to feed back the index information of the shaping mode.

In a possible implementation manner, if the shaping mode indicates that the same first precoding matrix and different second precoding matrix are used, respectively forming on the one precoding unit, The processor reads the program in the memory, and specifically performs: using, for each first precoding matrix in the first codebook, the first precoding matrix and the different second precoding matrix, respectively Forming on the first precoding unit; performing channel measurement on the shaped time-frequency resource for each first precoding matrix in the first codebook, and determining M CQIs corresponding to the time-frequency resource, M is the number of the first precoding matrix in the first codebook; selecting one CQI from the M CQIs to determine the CQI corresponding to the time-frequency resource; controlling the transceiver to feed back the first precoding corresponding to the selected CQI The index information of the matrix.

Based on the same inventive concept, the embodiment of the present invention further provides a base station, which is the same as the above-mentioned one of the channel state information receiving methods in the embodiment. For details, refer to the related description in the embodiment shown in FIG. Let me repeat. As shown in FIG. 8, the base station includes: receiving and receiving The machine 81 and the at least one processor 82 connected to the transceiver 81, wherein: the processor 82 is configured to read the program in the memory 83, and execute the following process: receiving, by the transceiver, at least one time-frequency resource corresponding Channel quality indicator (CQI); determining a shaping mode used for forming one precoding unit in the time-frequency resource when measuring the terminal channel, wherein the time-frequency resource is divided into one pre-coding unit, The shaping mode corresponds to a precoding matrix group, and the shaping mode represents a mapping relationship between a precoding unit in the time-frequency resource and a precoding matrix in the precoding matrix group corresponding to the shaping mode, where I is greater than An integer of 1; a transceiver 81 for receiving and transmitting data under the control of the processor 82.

In FIG. 8, the bus bar architecture may include any number of interconnected bus bars and bridges, specifically connected by one or more processors represented by the processor 82 and various circuits of the memory represented by the memory 83. . The busbar architecture can also couple various other circuits, such as peripherals, voltage regulators, and power management circuits, as is well known in the art, and therefore, will not be further described herein. The bus interface provides an interface. Transceiver 81 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.

The processor 82 is responsible for managing the bus bar architecture and the usual processing, and the memory 83 can store the data used by the processor 82 in performing the operations.

In a possible implementation manner, the number of the shaping modes is N, N shaping modes, and at least one piece of information in the precoding matrix included in each precoding matrix group corresponding to the shaping mode is pre-agreed or The processor determines and is notified by a semi-static signal or a dynamic signal; or there is a set correspondence between the at least one piece of information and system parameters other than the at least one piece of information; The number I of precoding units in at least one time-frequency resource is pre-agreed or notified by the processor through a semi-static signal or a dynamic signal; or the number I of precoding units in the time-frequency resource is divided There is a set correspondence between system parameters other than the number of precoding units.

In a possible implementation manner, the processor reads a program in the memory, and specifically performs: receiving, by the transceiver, a precoding unit forming station in the time-frequency resource for indicating terminal channel measurement The index information of the shaping mode used; according to the index information, the shaping mode used by the one precoding unit in the time-frequency resource when determining the terminal channel is determined.

In a possible implementation, the processor reads the program in the memory, and specifically performs: receiving, by the transceiver, index information of the first precoding matrix; and according to the index information of the received first precoding matrix, The shaping mode used for forming one precoding unit in the time-frequency resource when determining the terminal channel is determined.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Thus, the present invention can take the form of a fully hardware embodiment, a fully software embodiment, or an embodiment combining soft and hardware aspects. Moreover, the present invention may take the form of a computer program product embodied on one or more computer usable storage media (including but not limited to disk memory, CD-ROM, optical memory, etc.) containing computer usable code therein. .

The present invention has been described with reference to flowchart illustrations and/or block diagrams of a method, apparatus (system), and computer program product according to embodiments of the invention. It should be understood that the computer program instructions Each of the processes and/or blocks in the flowcharts and/or block diagrams, and combinations of the flowcharts and/or blocks in the flowcharts. These computer program instructions can be provided to a processor of a general purpose computer, a special purpose computer, an embedded processor or other programmable data processing device to produce a machine for executing instructions by a processor of a computer or other programmable data processing device Means are generated for implementing the functions specified in one or more flows of the flowchart or in a block or blocks of the block diagram.

The computer program instructions can also be stored in a computer readable memory that can boot a computer or other programmable data processing device to operate in a particular manner, such that instructions stored in the computer readable memory produce an article of manufacture including the instruction device. The instruction means implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device to perform a series of operational steps on a computer or other programmable device to produce computer-implemented processing on a computer or other programmable device. The instructions executed on the steps provide steps for implementing the functions specified in one or more flows of the flowchart or in a block or blocks of the flowchart.

Additional changes and modifications of the described embodiments of the invention will be apparent to those skilled in the <RTIgt; Therefore, the scope of the appended claims is intended to be construed as including the embodiment of the invention

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, the present invention is intended to cover such modifications and variations as fall within the scope of the present invention and its equivalents. Changes and variants.

S11-S13‧‧‧ steps

Claims (30)

A channel state information feedback method is characterized in that: the method uses a different precoding matrix in a precoding matrix group corresponding to the shaping mode according to the determined shaping mode, and prefetches in at least one time-frequency resource. The coding unit performs the shaping, wherein the time-frequency resource is divided into one pre-coding unit, and the shaping mode corresponds to a pre-coding matrix group, and the shaping mode represents one pre-coding unit and the Fu in the time-frequency resource. The mapping relationship between precoding matrices in the precoding matrix group corresponding to the mode, I is an integer greater than 1; the terminal performs channel measurement on the shaped time-frequency resource, and obtains a channel quality indicator corresponding to the time-frequency resource (CQI); the terminal feeds back the CQI corresponding to the time-frequency resource. The channel state information feedback method according to claim 1, wherein if the number N of the shaping mode is greater than 1, the terminal feeds back the CQI corresponding to the time-frequency resource, and further includes: the terminal feedback information of the shaping mode . The channel state information feedback method of claim 1, wherein the one precoding unit divides the time-frequency resource in a time domain; or the one precoding unit is the time-frequency resource in a frequency domain. Or the first precoding unit is obtained by jointly dividing the time-frequency resource in the time domain and the frequency domain. The channel state information feedback method according to claim 3, wherein the one precoding unit is Each precoding unit includes at least one orthogonal frequency division multiplexing (OFDM) symbol, or at least one physical resource block (PRB); or each of the one precoding unit includes at least one subcarrier Or at least one PRB pair; or each precoding unit of the one precoding unit includes at least one resource granule (RE). The channel state information feedback method of claim 4, wherein each of the one precoding units comprises a group of subcarriers, wherein each subcarrier includes at least one demodulation reference signal (DMRS) symbol . The channel state information feedback method according to claim 1, wherein the number of the shaping modes is N, the N shaping modes, and at least one of the precoding matrices included in the precoding matrix group corresponding to each of the shaping modes The information is pre-agreed or obtained through a semi-static signal or a dynamic signal; or there is a set correspondence between the at least one piece of information and system parameters other than the at least one piece of information; at least one time-frequency resource The number I of precoding units is pre-agreed, or obtained by semi-static signals or dynamic signals; or the number I of precoding units in the time-frequency resource and the system other than the number of pre-coding units There is a corresponding relationship between the parameters. The channel state information feedback method according to any one of claims 1 to 6, wherein the shaping mode indicates that different pre-coding matrix groups in the pre-coding matrix group corresponding to the shaping mode are used in the time domain. An encoding matrix, which is shaped on one of the precoding units in the at least one time-frequency resource; or the shaping mode indicates that different precoding matrices in the precoding matrix group corresponding to the shaping mode are used in the frequency domain, Forming on the one precoding unit; or the shaping mode indicating using different precoding matrices in the precoding matrix group corresponding to the shaping mode according to the order of the first time domain and the frequency domain, in the I Forming on the precoding unit; or the shaping mode indicating that different precoding matrices in the precoding matrix group corresponding to the shaping mode are used in the order of the time domain after the first frequency domain, on the one precoding unit Make a shape. The channel state information feedback method according to any one of claims 1 to 6, wherein the precoding matrix in the precoding matrix group corresponding to the shaping mode is based on a first precoding matrix in the first codebook. The second precoding matrix in the second codebook is obtained by a function operation; the shaping mode indicates that the same first precoding matrix and a different second precoding matrix are used, respectively, on the one precoding unit Or the shaping mode indicates that different first precoding matrices and different second precoding matrices are used to perform shaping on the one precoding unit. The channel state information feedback method according to claim 8, wherein if the shaping mode indicates that the same first precoding matrix and a different second precoding matrix are used, respectively Forming on the coding unit, the terminal performs shaping on one precoding unit in at least one time-frequency resource according to the shaping mode, using different precoding matrices in the precoding matrix group corresponding to the shaping mode The method includes: for each first precoding matrix in the first codebook, the terminal uses the first precoding matrix and the different second precoding matrix to perform shaping on the one precoding unit respectively; The terminal performs channel measurement on the shaped time-frequency resource, and determines a channel quality indicator (CQI) corresponding to the time-frequency resource, including: for each first pre-coding matrix in the first codebook, the terminal pair The shaped time-frequency resource performs channel measurement, and determines M CQIs corresponding to the time-frequency resource, where M is the number of the first pre-coding matrix in the first codebook; and selecting one CQI from the M CQIs is determined as The CQI corresponding to the time-frequency resource; the terminal feeding back the CQI corresponding to the time-frequency resource, and further comprising: the terminal feeding back index information of the first pre-coding matrix corresponding to the selected CQI. A channel state information receiving method, the method comprising: receiving, by a base station, a channel quality indicator (CQI) corresponding to at least one time-frequency resource; and determining, by the base station, a channel in the time-frequency resource when measuring the terminal channel The shaping mode used by the precoding unit to be shaped, wherein the time-frequency resource is divided into one precoding unit, and the shaping mode corresponds to a precoding matrix group, and the shaping mode represents I in the time-frequency resource A mapping relationship between precoding units and precoding matrices in a precoding matrix group corresponding to the shaping mode, where I is an integer greater than one. The channel state information receiving method according to claim 10, wherein the one precoding unit divides the time-frequency resource in a time domain; or The one precoding unit is obtained by dividing the time-frequency resource in a frequency domain; or the one precoding unit is jointly divided by the time-frequency resource in a time domain and a frequency domain. The channel state information receiving method of claim 11, wherein each of the one precoding units comprises at least one orthogonal frequency division multiplexing (OFDM) symbol, or at least one physical resource block ( PRB); or each precoding unit in the one precoding unit includes at least one subcarrier, or at least one PRB pair; or each precoding unit in the one precoding unit includes at least one resource element (RE ). The channel state information receiving method of claim 12, wherein each of the one precoding units comprises a group of subcarriers, wherein each subcarrier includes at least one demodulation reference signal (DMRS) symbol . The channel state information receiving method according to claim 10, wherein the number of the shaping modes is N, N shaping modes, and at least one of the precoding matrices included in the precoding matrix group corresponding to each shaping mode The item information is pre-agreed or notified by the semi-static signal or dynamic signal after being determined by the base station; or there is a corresponding correspondence between the at least one piece of information and system parameters other than the at least one piece of information; The number I of precoding units in at least one time-frequency resource is pre-agreed or The base station is determined to be notified by a semi-static signal or a dynamic signal; or there is a set correspondence relationship between the number I of precoding units in the time-frequency resource and system parameters other than the number of pre-coding units. The channel state information receiving method of claim 10, wherein the receiving, by the base station, the CQI corresponding to the at least one time-frequency resource, the method further comprises: the base station receiving the time-frequency resource for indicating the terminal channel measurement The index information of the shaping mode used by the one precoding unit is shaped; the base station determines the shaping mode used by the one precoding unit in the time-frequency resource when measuring the terminal channel, including: The base station determines, according to the index information, a shaping mode used for forming one precoding unit in the time-frequency resource when measuring the terminal channel. The channel state information receiving method according to any one of claims 10 to 15, wherein the shaping mode indicates that different precoding matrices in the precoding matrix group corresponding to the shaping mode are used in the time domain, Forming on one of the precoding units of the at least one time-frequency resource; or the shaping mode indicating that different precoding matrices in the precoding matrix group corresponding to the shaping mode are used in the frequency domain, in the I Forming on the precoding unit; or the shaping mode indicating that different precoding matrices in the precoding matrix group corresponding to the shaping mode are used in the order of the first time domain and the frequency domain, on the one precoding unit Make a shape; or The shaping mode indicates that the forming is performed on the one precoding unit by using different precoding matrices in the precoding matrix group corresponding to the shaping mode according to the order of the time domain in the first frequency domain. The channel state information receiving method according to any one of claims 10 to 15, wherein the shaping mode indicates that the same first precoding matrix and a different second precoding matrix are used, respectively, in the one precoding Forming on the unit; or the shaping mode indicates that different first precoding matrices and different second precoding matrices are used to perform shaping on the one precoding unit. The channel state information receiving method of claim 17, wherein the receiving, by the base station, the CQI corresponding to the at least one time-frequency resource, the method further includes: the base station receiving the index information of the first precoding matrix; the base station determining The shaping mode used by the one precoding unit in the time-frequency resource when the terminal channel is measured includes: the base station determines the terminal channel measurement time according to the index information of the received first precoding matrix The shaping mode used by the one precoding unit in the time-frequency resource is shaped. A channel state information feedback device, comprising: a shaping module, configured to use different precoding matrices in a precoding matrix group corresponding to the shaping mode according to the determined shaping mode, at least one The precoding unit in the time-frequency resource performs shaping, wherein the time-frequency resource is divided into one pre-coding unit, and the shaping mode corresponds to a pre-coding matrix group, and the shaping mode represents I in the time-frequency resource. The mapping relationship between the precoding matrices in the precoding matrix group corresponding to the shaping mode and the precoding unit, I An integer that is greater than one; a measurement module configured to perform channel measurement on the shaped time-frequency resource to obtain a channel quality indicator (CQI) corresponding to the time-frequency resource; and a feedback module configured to feedback the time-frequency resource corresponding CQI. The channel state information feedback device according to claim 19, wherein if the number N of the shaping modes is greater than 1, the feedback module is further configured to: feed back index information of the shaping mode. The channel state information feedback device according to claim 19, wherein the number of the shaping modes is N, N shaping modes, and at least one of the precoding matrices included in the precoding matrix group corresponding to each of the shaping modes The information is pre-agreed or obtained through a semi-static signal or a dynamic signal; or there is a set correspondence between the at least one piece of information and system parameters other than the at least one piece of information; at least one time-frequency resource The number I of precoding units is pre-agreed, or obtained by semi-static signals or dynamic signals; or the number I of precoding units in the time-frequency resource and the system other than the number of pre-coding units There is a corresponding relationship between the parameters. The channel state information feedback device according to any one of claims 19 to 21, wherein the shaping mode indicates that different precoding matrices in the precoding matrix group corresponding to the shaping mode are used in the time domain. Forming on one of the precoding units of the at least one time-frequency resource; or the shaping mode indicating that different precoding matrices in the precoding matrix group corresponding to the shaping mode are used in the frequency domain, in the I Forming on the precoding unit; or The shaping mode indicates that the forming is performed on the one precoding unit by using different precoding matrices in the precoding matrix group corresponding to the shaping mode according to the order of the first time domain and the frequency domain; or the shaping mode The indication is performed on the one precoding unit by using different precoding matrices in the precoding matrix group corresponding to the shaping mode according to the order of the time domain after the frequency domain. The channel state information feedback device according to any one of claims 19 to 21, wherein the precoding matrix in the precoding matrix group corresponding to the shaping mode is based on a first precoding matrix in the first codebook. The second precoding matrix in the second codebook is obtained by a function operation; the shaping mode indicates that the same first precoding matrix and a different second precoding matrix are used, respectively, on the one precoding unit Or the shaping mode indicates that different first precoding matrices and different second precoding matrices are used to perform shaping on the one precoding unit. The channel state information feedback device of claim 23, wherein if the shaping mode indicates that the same first precoding matrix and a different second precoding matrix are used, respectively forming on the one precoding unit The shaping module is specifically configured to: use, for each first precoding matrix in the first codebook, the first precoding matrix and the different second precoding matrix, respectively, in the one precoding unit Forming; the measuring module is specifically configured to: for each first precoding matrix in the first codebook, Performing channel measurement on the time-frequency resource after the shaping, determining M CQIs corresponding to the time-frequency resource, where M is the number of the first pre-coding matrix in the first codebook, and selecting a CQI from the M CQIs The CQI corresponding to the time-frequency resource; the feedback module is further configured to: feed back index information of the first pre-coding matrix corresponding to the selected CQI. A channel state information receiving device, comprising: a receiving module, configured to receive a channel quality indicator (CQI) corresponding to at least one time-frequency resource; and a determining module, configured to determine when the terminal channel is measured The shaping mode used by the one precoding unit in the time-frequency resource, wherein the time-frequency resource is divided into one pre-coding unit, and the shaping mode corresponds to a pre-coding matrix group, and the shaping mode And mapping a mapping relationship between a precoding unit in the time-frequency resource and a precoding matrix in the precoding matrix group corresponding to the shaping mode, where I is an integer greater than 1. The channel state information receiving apparatus according to claim 25, wherein the number of the shaping modes is N, N shaping modes, and at least one of the precoding matrices included in the precoding matrix group corresponding to each of the shaping modes The information is pre-agreed or determined by the determining module and notified by a semi-static signal or a dynamic signal; or there is a set correspondence between the at least one piece of information and system parameters other than the at least one piece of information; The number I of precoding units in at least one time-frequency resource is pre-agreed or determined by the determining module and notified by a semi-static signal or a dynamic signal; or the number of pre-coding units in the time-frequency resource There is a set correspondence relationship with system parameters other than the number of precoding units. The channel state information receiving apparatus according to claim 25, wherein the receiving module is further configured to: receive an assignment used by the one precoding unit in the time-frequency resource for indicating the measurement of the terminal channel The indexing information of the shape mode is specifically configured to: determine, according to the index information, a shaping mode used by the one precoding unit in the time-frequency resource when measuring the terminal channel. The channel state information receiving apparatus according to any one of claims 25 to 27, wherein the shaping mode indicates that different precoding matrices in the precoding matrix group corresponding to the shaping mode are used in the time domain, Forming on one of the precoding units of the at least one time-frequency resource; or the shaping mode indicating that different precoding matrices in the precoding matrix group corresponding to the shaping mode are used in the frequency domain, in the I Forming on the precoding unit; or the shaping mode indicating that different precoding matrices in the precoding matrix group corresponding to the shaping mode are used in the order of the first time domain and the frequency domain, on the one precoding unit The shaping is performed; or the shaping mode indicates that the shaping is performed on the one precoding unit by using different precoding matrices in the precoding matrix group corresponding to the shaping mode according to the order of the time domain after the frequency domain. The channel state information receiving apparatus according to any one of claims 25 to 27, wherein the shaping mode indicates that the same first precoding matrix and a different second precoding matrix are used, respectively, in the one precoding Forming on the unit; Or the shaping mode indicates that different first precoding matrices and different second precoding matrices are used to perform shaping on the one precoding unit respectively. The channel state information receiving device of claim 29, wherein the receiving module is further configured to: receive index information of the first precoding matrix; the determining module is specifically configured to: according to the received first precoding The index information of the matrix determines the shaping mode used by the one precoding unit in the time-frequency resource when measuring the terminal channel.