CN104243003A - Transmission method and device based on channel state information of codebook - Google Patents

Transmission method and device based on channel state information of codebook Download PDF

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Publication number
CN104243003A
CN104243003A CN201310224583.1A CN201310224583A CN104243003A CN 104243003 A CN104243003 A CN 104243003A CN 201310224583 A CN201310224583 A CN 201310224583A CN 104243003 A CN104243003 A CN 104243003A
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pre
coding matrix
code book
compression
coding
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CN201310224583.1A
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Chinese (zh)
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CN104243003B (en
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张然然
苏昕
拉盖施
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电信科学技术研究院
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636Feedback format
    • H04B7/0639Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0456Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621Feedback content
    • H04B7/063Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621Feedback content
    • H04B7/0632Channel quality parameters, e.g. channel quality indicator [CQI]

Abstract

The invention embodiment discloses a transmission method and device based on channel state information of a codebook; there is no specific scheme for returning the channel state information according to an enhanced codebook in the prior art under four antenna ports; the application can solve the said problems; the method comprises the following steps: a terminal receives indication information sent by a base station, and determines RI and a pre-encoding matrix from compressed four antenna codebooks; determining the RI and a combined coded value used for indicating a first PMI of a first codebook index of the pre-encoding matrix according to set combined coding rules; sending the combined coded value to the base station in a set feedback time according to a feedback mode indicated in the indication information, and sending a second PMI of a second codebook index of the pre-encoding matrix and a CQI to the base station in another set feedback time, thus carrying out channel state information feedback based on the enhanced codebook under four antenna ports.

Description

A kind of transmission method of the channel condition information based on code book and device

Technical field

The present invention relates to communication technical field, particularly a kind of transmission method of the channel condition information based on code book and device.

Background technology

At present, Long Term Evolution strengthens (Long Term Evolution-Advanced, LTE-A) system and supports 10 kinds of transmission modes, and 4 kinds of Physical Uplink Control Channel (Physical Downlink Control Channel, PUCCH) report pattern.Based on the semi-static configuration of high-level signaling, terminal (User Equipment, UE; Also referred to as subscriber equipment) on PUCCH, adopt PUCCH as shown in table 1 to report pattern (Reporting Mode) to feed back different channel quality identification (Channel Quality Indication periodically, CQI), pre-coding matrix mark (Precoding Matrix Indication, PMI) and order instruction (Rank Indication, RI).

Table 1

Concrete, for often kind of transmission mode, it supports that following PUCCH reports pattern:

Transmission mode 1: pattern 1-0 and pattern 2-0.

Transmission mode 2: pattern 1-0 and pattern 2-0.

Transmission mode 3: pattern 1-0 and pattern 2-0.

Transmission mode 4: pattern 1-1 and pattern 2-1.

Transmission mode 5: pattern 1-1 and pattern 2-1.

Transmission mode 6: pattern 1-1 and pattern 2-1.

Transmission mode 7: pattern 1-0 and pattern 2-0.

Transmission mode 8: report if UE is configured to PMI/RI, then support mode 1-1 and pattern 2-1;

If UE is configured to do not have PMI/RI to report, then support mode 1-0 and pattern 2-0.

Transmission mode 9: to report and CSI-RS port number is greater than 1, then support mode 1-1 and pattern 2-1 if UE is configured to PMI/RI;

If UE is configured to not have PMI/RI to report or CSI-RS port number is 1, then support mode 1-0 and pattern 2-0.

Transmission mode 10: to report and CSI-RS port number is greater than 1, then support mode 1-1 and pattern 2-1 if UE is configured to PMI/RI;

If UE is configured to not have PMI/RI to report or CSI-RS port number is 1, then support mode 1-0 and pattern 2-0.

Wherein, report pattern 1-1 for feeding back RI, broadband P MI and broadband CQI.

In PMI calculates, when antenna port number (CRS port or CSI-RS port) is 4, the code book (Codebook) used is as shown in table 2:

Table 2

But, in order to improve the feedback accuracy of 4 antenna port situation lower channel state informations, strengthen to the code book of 4 antenna ports in LTE-A redaction (R12, Release-12).The possible enhanced scheme of code book comprises:

Code book enhanced scheme 1:

W 1 = X n 0 0 X n wheren = 0,1 , . . . , 15

X n = 1 1 1 1 q 1 n q 1 n + 8 q 1 n + 16 q 1 n + 24

Forrank 1 , W 2 , n ∈ { 1 2 Y α ( i ) Y , 1 2 Y jα ( i ) Y , 1 2 Y - α ( i ) Y , 1 2 Y - jα ( i ) Y }

and?Y∈{e 1,e 2,e 3,e 4}??and?α(i)=q 1 2(i-1);

Forrank 2 , W 2 , n ∈ { 1 2 Y 1 Y 2 Y 1 - Y 2 , 1 2 Y 1 Y 2 j Y 1 - j Y 2 }

and(Y 1,Y 2)=(e i,e k)∈{(e 1,e 1),(e 2,e 2),(e 3,e 3),(e 4,e 4),(e 1,e 2),(e 2,e 3),(e 1,e 4),(e 2,e 4)};

Or;

Code book enhanced scheme 2:

W 1 = X n 0 0 X n wheren = 0,1 , . . . 15

X n = 1 1 1 1 q 1 n q 1 n + 8 q 1 n + 16 q 1 n + 24 where q 1 = e j 2 π / 32

Forrank 1 , W 2 , n ∈ { 1 2 Y α ( i ) Y , 1 2 Y jα ( i ) Y , 1 2 Y - α ( i ) Y , 1 2 Y - jα ( i ) Y }

and?Y∈{e 1,e 2,e 3,e 4}and?α(i)=q 1 2(i-1);

For?rank2,

W 2 , n ∈ { 1 2 Y 1 Y 2 Y 1 Y 2 , 1 2 Y 1 Y 2 Y 1 - Y 2 , 1 2 Y 1 Y 2 - Y 1 Y 2 , 1 2 Y 1 Y 2 - Y 1 - Y 2 } ( Y 1 , Y 2 ) ∈ { ( e 2 , e 4 ) }

and

W 2 , n ∈ { 1 2 Y 1 Y 2 Y 1 - Y 2 , 1 2 Y 1 Y 2 j Y 1 - j Y 2 } ( Y 1 , Y 2 ) ∈ { ( e 1 , e 1 ) , ( e 2 , e 2 ) , ( e 3 , e 3 ) , ( e 4 , e 4 ) }

and

W 2 , n ∈ { 1 2 Y 1 Y 2 Y 2 - Y 1 , } ( Y 1 , Y 2 ) ∈ { ( e 1 , e 3 ) , ( e 2 , e 4 ) , ( e 3 , e 1 ) , ( e 4 , e 2 ) }

Wherein, in above-mentioned two kinds of enhanced scheme in Rank3 and Rank4 situation, the code book of existing 4 antenna ports is still continued to use.

In lte-a system, the user of redaction (R12) carries out except PMI feedback except utilizing the code book in table 2, can also choice for use strengthen after code book carry out the feedback of channel condition information.Strengthen code book and adopt different codebook structures from existing code book, be in particular in: a corresponding pre-coding matrix of code book index in existing code book, and by corresponding for an employing two code book indexes pre-coding matrix in code book after strengthening, namely in the code book after strengthening, a pre-coding matrix needs to be determined by a pair code book index (being designated as the first code book index and the second code book index), therefore, the code book after existing PUCCH Mode1-1 cannot support user to use enhancing carries out the feedback of RI, broadband P MI, broadband CQI and subband CQI.

In sum, in 4 antenna port situations, also do not carry out the concrete scheme of the feedback of channel condition information at present based on the code book after enhancing.

Summary of the invention

Embodiments providing a kind of transmission method of the channel condition information based on code book with Zhuan Ge, for solving in 4 antenna port situations, also not carrying out the problem of the concrete scheme of the feedback of channel condition information at present based on the code book after enhancing.

Embodiments provide a kind of sending method of the channel condition information based on code book, comprising:

Terminal, after the indication information receiving base station transmission, from 4 antenna codebooks after compression, determines the pre-coding matrix that order indicates RI and uses;

Described terminal, according to the combined coding rule of setting, determines the combined coding value that described RI indicates PMI corresponding with the first pre-coding matrix of the first code book index being used to indicate described pre-coding matrix;

Described terminal is according to the feedback model indicated in described indication information, in the feedback moment of setting, the combined coding value determined is sent to described base station, in the feedback moment of another setting, the 2nd PMI and channel quality indicator (CQI) that are used to indicate the second code book index of described pre-coding matrix are sent to described base station;

Wherein, 4 antenna codebooks refer under the configuration of 4 pilot frequency port for carry out pre-coding matrix indication feedback and comprise the code book of the first code book index and the second code book index, the span of the first code book index is 0 ~ N-1, wherein N be greater than 1 integer; 4 antenna codebooks after described compression refer to the code book obtained after the first pre-coding matrix set corresponding to the first code book index in described 4 antenna codebooks is compressed, and the first pre-coding matrix set after described compression comprises the part pre-coding matrix in the first pre-coding matrix set before compression.

Embodiments provide a kind of method of reseptance of the channel condition information based on code book, comprising:

Base station sends indication information to terminal, and described indication information is used to indicate described terminal feedback channel condition information and this feeds back the feedback model used;

Described base station is according to described feedback model, in the feedback moment of setting, receive the combined coding value of RI and the PMI that described terminal sends, and terminal transmission described in feedback reception of another setting be used to indicate compression after 4 antenna codebooks in the 2nd PMI and CQI of the second code book index of pre-coding matrix;

The first code book index of the RI that the combined coding value that receives is corresponding and described pre-coding matrix, according to the combined coding rule of setting, is determined in described base station;

Wherein, 4 antenna codebooks refer under the configuration of 4 pilot frequency port for carry out pre-coding matrix indication information feedback and comprise the code book of the first code book index and the second code book index, the span of the first code book index is 0 ~ N-1, wherein N be greater than 1 integer; 4 antenna codebooks after described compression refer to the code book obtained after the first pre-coding matrix set corresponding to the first code book index in described 4 antenna codebooks is compressed, and the first pre-coding matrix set after described compression comprises the part pre-coding matrix in the first pre-coding matrix set before compression.

Embodiments provide a kind of terminal, comprising:

First determination module, for after the indication information receiving base station transmission, from 4 antenna codebooks after compression, the pre-coding matrix determined RI and use;

Second determination module, for the combined coding rule according to setting, determines the combined coding value that described RI indicates PMI corresponding with the first pre-coding matrix of the first code book index being used to indicate described pre-coding matrix;

Feedback module, for according to the feedback model indicated in described indication information, in the feedback moment of setting, the combined coding value determined is sent to described base station, in the feedback moment of another setting, the 2nd PMI and channel quality indicator (CQI) that are used to indicate the second code book index of described pre-coding matrix are sent to described base station;

Wherein, 4 antenna codebooks refer under the configuration of 4 pilot frequency port for carry out pre-coding matrix indication feedback and comprise the code book of the first code book index and the second code book index, the span of the first code book index is 0 ~ N-1, wherein N be greater than 1 integer; 4 antenna codebooks after described compression refer to the code book obtained after the first pre-coding matrix set corresponding to the first code book index in described 4 antenna codebooks is compressed, and the first pre-coding matrix set after described compression comprises the part pre-coding matrix in the first pre-coding matrix set before compression.

Embodiments provide a kind of base station, comprising:

Sending module, for sending indication information to terminal, described indication information is used to indicate described terminal feedback channel condition information and this feeds back the feedback model used;

Receiver module, for according to described feedback model, in the feedback moment of setting, receive the combined coding value of RI and the PMI that described terminal sends, and terminal transmission described in feedback reception of another setting be used to indicate compression after 4 antenna codebooks in the 2nd PMI and CQI of the second code book index of pre-coding matrix;

Processing module, for the combined coding rule according to setting, determines the first code book index of the RI that the combined coding value that receives is corresponding and described pre-coding matrix;

Wherein, 4 antenna codebooks refer under the configuration of 4 pilot frequency port for carry out pre-coding matrix indication information feedback and comprise the code book of the first code book index and the second code book index, the span of the first code book index is 0 ~ N-1, wherein N be greater than 1 integer; 4 antenna codebooks after described compression refer to the code book obtained after the first pre-coding matrix set corresponding to the first code book index in described 4 antenna codebooks is compressed, and the first pre-coding matrix set after described compression comprises the part pre-coding matrix in the first pre-coding matrix set before compression.

In the embodiment of the present invention, terminal receive base station send indication information after, from compression after 4 antenna codebooks, the pre-coding matrix determined RI and use; According to the combined coding rule of setting, determine the combined coding value that this RI is corresponding with a PMI of the first code book index being used to indicate this pre-coding matrix; And according to the feedback model indicated in indication information, in the feedback moment of setting, the combined coding value determined is sent to base station, and in the next one feedback moment, the 2nd PMI and CQI being used to indicate the second code book index of this pre-coding matrix is sent to base station;

Base station sends indication information to terminal, feeds back with indicating terminal feeding back channel state information and this feedback model used; According to described feedback model, in the feedback moment of setting, the combined coding value of the RI that receiving terminal sends and a PMI, at the 2nd PMI and CQI that the feedback reception terminal of another setting sends; And according to the combined coding rule of setting, determine the RI that the combined coding value that receives is corresponding and the first code book index;

Visible, the transmission method of the channel condition information that the embodiment of the present invention provides and device, by the corresponding relation that defines in the combined coding rule of 4 antenna codebooks after compression and setting, under achieving 4 antenna port situations, carry out the feedback of channel condition information based on the code book after strengthening.

Accompanying drawing explanation

The schematic flow sheet of the sending method of the channel condition information based on code book that Fig. 1 provides for the embodiment of the present invention;

The schematic flow sheet of the method for reseptance of the channel condition information based on code book that Fig. 2 provides for the embodiment of the present invention;

The structural representation of the first terminal that Fig. 3 provides for the embodiment of the present invention;

The structural representation of the first base station that Fig. 4 provides for the embodiment of the present invention;

The structural representation of the second terminal that Fig. 5 provides for the embodiment of the present invention;

The structural representation of the second base station that Fig. 6 provides for the embodiment of the present invention.

Embodiment

The present invention passes through the corresponding relation defined in the combined coding rule of 4 antenna codebooks after compressing and setting, under achieving 4 antenna port situations, carries out the feedback of channel condition information based on the code book after enhancing.

In order to support two PMI feedback, when antenna port (CRS port or CSI-RS port) number is 8, PUCCH reports pattern 1-1 to support following two spermotypes (Submode) further:

Submode1: comprise 2 class Report Types: Report Type 5, for feeding back a RI and PMI; Report Type 2b, for feeding back CQI and the 2nd PMI;

Submode2: comprise 2 class Report Types: Report Type 3, for feeding back RI; Report Type 2c, for feeding back CQI, a PMI and the 2nd PMI.

In 4 antenna port situations, pre-coding matrix in code book after enhancing is by each pre-coding matrix in the second pre-coding matrix set corresponding with the 2nd PMI of each pre-coding matrix in the first pre-coding matrix set corresponding to a PMI, formed according to the enhanced scheme of setting, the number of the pre-coding matrix that the code book after enhancing comprises is the number of the pre-coding matrix that the number × the second pre-coding matrix set of the pre-coding matrix that the first pre-coding matrix set comprises comprises, and each pre-coding matrix in code book after strengthening needs jointly to be determined by a PMI and the 2nd PMI.Therefore, existing PUCCH mode1-1 cannot support to use and strengthen after code book carries out RI, broadband P MI(comprises a PMI and the 2nd PMI), broadband CQI and subband CQI feedback; The method similar with 8 antenna ports can be adopted to allow when 4 antenna port and also to support Submode1 and Submode2.

But, because the number of the pre-coding matrix in the code book after enhancing in 4 antenna port situations is different from the number of the pre-coding matrix in code book in 8 antenna port situations, therefore, the feedback method of the subpattern 1 of the PUCCH pattern 1-1 of 8 antenna ports cannot directly apply to the feedback of 4 antenna ports.

Embodiments provide a kind of transmission method of the channel condition information based on code book Ji Zhuan Ge, in order to solve in 4 antenna port situations, carry out the problem of the feedback of channel condition information based on the code book after enhancing; In the embodiment of the present invention, in 4 antenna port situations, PUCCH reports pattern 1-1 also to support, and the PUCCH of similar 8 antenna ports reports the subpattern 1 of pattern 1-1, namely comprise the Report Type of the combined coding value of an a feedback RI and PMI and the Report Type of feedback the 2nd PMI and CQI, adopt above-mentioned pattern cycle to report RI, a PMI, the 2nd PMI and CQI.

Due to the code book enhanced scheme that may use in 4 antenna port situations comprise RI=1 situation under need use 4 bit to represent to need use 4 bit to represent under a PMI and 4 bits represent the 2nd PMI, RI=2 situation that a PMI and 4 bits represent the 2nd PMI, and a PM and 4 bits represent the 2nd PMI to need use 0 bit to represent in RI=3 and RI=4 situation respectively, therefore, comprise 24+24+20+20=34 kind state after a RI and PMI carries out combined coding, need 6 bits to feed back.

Consider that the information bit of the combined coding value of RI and the PMI reported is larger, its transmission reliability is lower, and the 2nd PMI and CQI of subsequent feedback calculates based on the RI fed back an and PMI, therefore, there is error code in the combined coding value of RI and a PMI, can cause makeing mistakes when next feedback cycle internal feedback the 2nd PMI and CQI in feedback procedure.When 4 antenna port, in order to ensure the transmission reliability of PUCCH, need to compress the code book of 4 antenna ports, after enabling RI and a PMI combined coding, information bit is no more than bit number corresponding to the error rate that system tolerates.

For convenience of description, the preferred structure of the code book used according to 8 antenna ports, by 4 antenna port situations, the code book that the code book enhanced scheme that may use is formed adopts following two-dimentional form to represent:

Definition: v m = 1 e j 2 πm / 32 T ;

1,4 antenna codebooks adopting code book enhanced scheme 1 to obtain are as table 3A and show shown in 3B, wherein, and i 1with i 2be code book index, i 1represent the first code book index, i 2represent the second code book index.

The code book of table 3A:RI=1;

The code book of table 3B:RI=2;

2,4 antenna codebooks adopting code book enhanced scheme 2 to obtain are as table 4A and show shown in 4B, wherein, and i 1with i 2be code book index, i 1represent the first code book index, i 2represent the second code book index.

The code book of table 4A:RI=1;

The code book of table 4B:RI=2;

It should be noted that, the structure of above-mentioned 4 antenna codebooks enumerated is for convenience and the one provided preferably realizes, it is not the restriction of the structure to 4 antenna codebooks, first code book index order corresponding to adopting other between pre-coding matrix and/or between the second code book index with pre-coding matrix in 4 antenna codebooks, changing pre-coding matrix in 4 antenna codebooks does not affect the performance of this 4 antenna codebook with the first code book index and pre-coding matrix with the corresponding order of the second code book index.

The code book compression scheme that the embodiment of the present invention provides is all sequentially design with corresponding between pre-coding matrix and between the second code book index with pre-coding matrix based on showing the first code book index shown in 3A ~ table 3B and table 4A ~ table 4B above.For a code book compression scheme, if the first code book index of code book and the corresponding order between pre-coding matrix and between the second code book index with pre-coding matrix before changing compression, the value of the first code book index after the compression that corresponding code book compression scheme obtains should adjust accordingly, but must to regard as be same code book compression scheme;

Also be, for two code book compression schemes, if the pre-coding matrix number comprised in the code book after compression is identical, and for the arbitrary pre-coding matrix in the code book after any one compression, identical pre-coding matrix can be found from the code book after another one compression, then think that these two code book compression schemes are compression schemes of the same race.

Below in conjunction with Figure of description, the embodiment of the present invention is described in further detail.

Shown in Figure 1, embodiments provide a kind of sending method of the channel condition information based on code book, the method comprises:

Step 11, terminal receive base station send indication information after, from compression after 4 antenna codebooks, the pre-coding matrix determined RI and use;

Wherein, this indication information is used to indicate the feedback that terminal carries out channel condition information, and indicates this to feed back the feedback model used;

Preferably, this indication information can pass through control signal (as Downlink Control Information (Downlink Control Information, DCI)) transmission.

In this step, terminal can according to transmission characteristic and/or terminal capability, from 4 antenna codebooks after compression, and the pre-coding matrix determined RI and use.

Step 12, terminal, according to the combined coding rule of setting, determine the combined coding value that this RI is corresponding with a PMI of the first code book index being used to indicate this pre-coding matrix;

Wherein, the combined coding value defining RI and a PMI in this combined coding rule (is designated as I rI/PMI1), RI and compression after 4 antenna codebooks in pre-coding matrix the first code book index between corresponding relation, one PMI is used to indicate the first code book index of pre-coding matrix in 4 antenna codebooks after compression, and with this compression after 4 antenna codebooks in the first code book index one_to_one corresponding of pre-coding matrix.

The combined coding value determined, according to the feedback model indicated in indication information, in the feedback moment of setting, is sent to base station by step 13, terminal, and in the feedback moment of another setting, the 2nd PMI and CQI of pre-coding matrix is sent to base station.

Wherein, the 2nd PMI is used to indicate the second code book index of pre-coding matrix in 4 antenna codebooks after compression, and with this compression after 4 antenna codebooks in the second code book index one_to_one corresponding of pre-coding matrix.

In the embodiment of the present invention, 4 antenna codebooks refer under the configuration of 4 pilot frequency port for carry out pre-coding matrix indication information feedback and comprise the code book of the first code book index and the second code book index, the span of the first code book index is 0 ~ N-1, wherein N be greater than 1 integer; 4 antenna codebooks after this compression refer to the code book obtained after the first pre-coding matrix set corresponding to a PMI in above-mentioned 4 antenna codebooks is compressed, and the first pre-coding matrix set after this compression comprises the part pre-coding matrix in the first pre-coding matrix set before compression.

Concrete, 4 antenna codebooks in the embodiment of the present invention after compression are by the first pre-coding matrix set after compressing and the second pre-coding matrix set corresponding to the second code book index, adopt the code book enhanced scheme of setting to obtain; Part pre-coding matrix in 4 antenna codebooks before compression is comprised in 4 antenna codebooks after compression.

In force, in order to reduce the RI bit number corresponding with the combined coding value of a PMI, the first pre-coding matrix set corresponding to the first code book index in 4 antenna codebooks is compressed, and total number of the RI determined to make 4 antenna codebooks after based on compression and the combined coding value of a PMI is not more than 2 n, wherein, N is transmitted bit number corresponding to the error rate that system can be tolerated;

Illustrate, if system can tolerate the error rate under 5 bit informations, i.e. N=5, then total number of the RI determined based on 4 antenna codebooks after compression and the combined coding value of a PMI is not more than 2 5=32, namely the combined coding value of RI and a PMI can only get 0 ~ 31;

If system can tolerate the error rate under 4 bit informations, i.e. N=4, then the total number based on the combined coding value of the RI that determines of 4 antenna codebooks after a compression and PMI is not more than 2 4=16, namely the combined coding value of RI and a PMI can only get 0 ~ 15.

In the embodiment of the present invention, the first pre-coding matrix set after compression comprises the part pre-coding matrix in the first pre-coding matrix set before compression, namely the pre-coding matrix that the first pre-coding matrix set after compression comprises is still the pre-coding matrix in the first pre-coding matrix set before compression, the pre-coding matrix that the first pre-coding matrix set before the number of the pre-coding matrix that the first pre-coding matrix set just after compression comprises is less than compression comprises, total number of the RI determined to make 4 antenna codebooks after based on compression and the combined coding value of a PMI is not more than 2 n,

Illustrate, as being that the first pre-coding matrix set boil down to that in the code book of 1, first code book index is corresponding only comprises 15 pre-coding matrixes by order in 4 antenna codebooks, and order is that the first pre-coding matrix set boil down to that in the code book of 2, first code book index is corresponding only comprises 15 pre-coding matrixes, total number of the RI then determined based on 4 antenna codebooks after this compression and the combined coding value of a PMI is minimum can be 31, only needs 5 bits to represent;

And for example, be that the first pre-coding matrix set boil down to that in the code book of 1, first code book index is corresponding only comprises 8 pre-coding matrixes by order in 4 antenna codebooks, and order is that the first pre-coding matrix set boil down to that in the code book of 2, first code book index is corresponding only comprises 8 pre-coding matrixes, total number of the RI then determined based on 4 antenna codebooks after this compression and the combined coding value of a PMI is minimum can be 18, only needs 5 bits to represent; Etc..

In force, the first pre-coding matrix set after compression adopts following arbitrary preferred structure:

Mode one, by compression before the first pre-coding matrix set in pre-coding matrix be divided into group, the pre-coding matrix that wherein often group comprises has identical discrete Fourier transform (Discrete Fourier Transform, DFT) vector; One is chosen arbitrarily, as the pre-coding matrix in the first pre-coding matrix set after compression from the pre-coding matrix that often group comprises.

Further, the DFT vector that each pre-coding matrix often in group comprises putting in order in different pre-coding matrixes may be different.

Based on the first code book index shown in table 3A, table 3B, table 4A and table 4B, the second code book index and pre-coding matrix corresponding sequentially, the code book compression scheme of which one is specially:

Pre-coding matrix in the first pre-coding matrix set before compression is divided into group, wherein often group comprises pre-coding matrix that first code book index is n and the first code book index is pre-coding matrix, the span of n is choose arbitrarily one from often organizing pre-coding matrix, the first pre-coding matrix set after this compression comprises all pre-coding matrixes selected;

Concrete, 16 are got for N, pre-coding matrix in the first pre-coding matrix set before compression is divided into 8 groups, and often group comprises pre-coding matrix that first code book index is n and first code book index is the pre-coding matrix of n+8, chooses arbitrarily one from often organizing pre-coding matrix, the first pre-coding matrix set after this compression comprises all pre-coding matrixes selected, wherein, n=0,1,2 ..., 15;

No matter adopt code book enhanced scheme 1 or adopt code book enhanced scheme 2, the column vector set comprised in the first pre-coding matrix that the first pre-coding matrix that in code book after enhancing, the n-th the first code book indexes are corresponding is corresponding with the n-th+8 the first code book indexes is identical, difference is only its difference that puts in order respectively arranged, specific as follows:

(1) get 16 for N, for the situation of RI=1, the pre-coding matrix that the first code book index comprises for n+8 for n and the first code book index is as shown in table 5A and table 5B:

Table the 5A: the first code book index is n

Table the 5B: the first code book index is n

Contrast table 5A and two groups of pre-coding matrixes on relevant position in table 5B, can find out the DFT vector v that both are corresponding mbe identical, difference is only phase difference of pi/8, i.e. the put in order difference of this DFT vector in different pre-coding matrixes, according to the rule of the codebook design under dual-polarized antenna array, v mfor quantizing beam direction, for quantizing the phase place between dual-polarized array, therefore, 4 antenna codebooks (namely adopting mode a pair 4 antenna codebooks to compress) after adopting compression under dual-polarized array affect minimum with adopting 4 antenna codebooks before compressing on a PMI and the 2nd PMI feedback performance.

Based on the first code book index shown in table 3A, table 3B, table 4A and table 4B, the second code book index and pre-coding matrix corresponding sequentially, as a kind of preferred structure, in the first pre-coding matrix set before the first pre-coding matrix set after this compression comprises compression, the first code book index is pre-coding matrix.

Illustrate, when getting 16, RI=1 for N, 4 antenna codebooks adopting code book enhanced scheme 1 or code book enhanced scheme 2 to be formed can the structure of boil down to as shown in table 6A:

Table 6A

Based on the first code book index shown in table 3A, table 3B, table 4A and table 4B, the second code book index and pre-coding matrix corresponding sequentially, as another kind of preferred structure, in the first pre-coding matrix set before the first pre-coding matrix set after this compression comprises compression, the first code book index is pre-coding matrix.

Illustrate, when getting 16, RI=1 for N, 4 antenna codebooks adopting code book enhanced scheme 1 or code book enhanced scheme 2 to be formed can the structure of boil down to as shown in table 6B:

Table 6B

Under this preferred structure, in 4 antenna codebooks after compression, the first code book index can continue to use the first code book index that in the first pre-coding matrix set before compression, pre-coding matrix is corresponding, be 8 ~ 15 as shown the first code book index in 4 antenna codebooks in 6B after this compression, also (namely redefining the first code book index that each pre-coding matrix is corresponding) can be renumberd for the pre-coding matrix comprised the first pre-coding matrix set after compression, as in 4 antenna codebooks after this compression, the first code book index is 0 ~ 8, as long as ensure that terminal and base station are consistent to the understanding of the first code book index in 4 antenna codebooks after compressing.

(2) get 16 for N, for the situation of RI=2, the pre-coding matrix that the first code book index comprises for n+8 for n and the first code book index is as shown in table 7A and table 7B:

Table the 7A: the first code book index is n, and adopts code book enhanced scheme 1

Table the 7B: the first code book index is n+8, and adopts code book enhanced scheme 1:

Contrast table 7A and two groups of pre-coding matrixes on relevant position in table 7B, can find out the v that both discoveries are corresponding mvector is identical or v mwith v m 'numbering difference be identical, difference is only the phase place between dual-polarized array, therefore, under dual-polarized array adopt compression after 4 antenna codebooks and adopt compression before 4 antenna codebooks on a PMI and the 2nd PMI feedback performance impact minimum.

As a kind of preferred structure, in the first pre-coding matrix set before the first pre-coding matrix set after this compression comprises compression, the first code book index is pre-coding matrix.

Illustrate, when RI=1,4 antenna codebooks adopting code book enhanced scheme 1 to be formed can the structure of boil down to as shown in table 8A:

Table 8A

Illustrate, when RI=2,4 antenna codebooks adopting code book enhanced scheme 2 to be formed can the structure of boil down to as shown in table 8B:

Table 8B

As another kind of preferred structure, in the first pre-coding matrix set before the first pre-coding matrix set after this compression comprises compression, the first code book index is pre-coding matrix.

Under this preferred structure, in 4 antenna codebooks after compression, the first code book index can continue to use the first code book index that in the first pre-coding matrix set before compression, pre-coding matrix is corresponding, also (namely redefining the first code book index that each pre-coding matrix is corresponding) can be renumberd for the pre-coding matrix comprised the first pre-coding matrix set after compression, as in 4 antenna codebooks after this compression, the first code book index is 0 ~ 8, as long as ensure that terminal and base station are consistent to the understanding of the first code book index in 4 antenna codebooks after compressing.

It should be noted that, based on the first code book index shown in table 3A, table 3B, table 4A and table 4B, the second code book index and pre-coding matrix corresponding sequentially, under which, get 16 for N, in 4 antenna codebooks after compression, the first code book index corresponds to the pre-coding matrix set W that comprises 8 pre-coding matrixes 1, as:

W 1 = X n 0 0 X n , X n = 1 1 1 1 q 1 n q 1 n + 8 q 1 n + 16 q 1 n + 24 , q 1 = e j 2 π / 32 , n = 0 , . . . , 7 ;

And for example, W 1 = X n 0 0 X n , X n = 1 1 1 1 q 1 n q 1 n + 8 q 1 n + 16 q 1 n + 24 , q 1 = e j 2 π / 32 , n = 8 , . . . , 15 ;

32 different discrete Fourier transform (Discrete Fourier Transform, DFT) vectors are comprised in 4 antenna codebooks after this compress mode ensure that compression v m = 1 e j 2 πm / 32 T , m = 0 , . . . , 21 .

Mode two, by compression before the first pre-coding matrix set in pre-coding matrix be divided into group, wherein, the first row DFT vector of two pre-coding matrixes often in group is adjacent DFT vector; One is chosen arbitrarily, as the pre-coding matrix in the first pre-coding matrix set after compression from often organizing pre-coding matrix.

Wherein, so-called adjacent DFT vector refers to, v m = 1 e j 2 πm / 32 T Middle m gets two DFT vectors that two adjacent number values obtain, as v mand v m+1.

Based on the first code book index shown in table 3A, table 3B, table 4A and table 4B, the second code book index and pre-coding matrix corresponding sequentially, the code book compression scheme of which two is specially:

In the first pre-coding matrix set before the first pre-coding matrix set after this compression comprises compression, the first code book index is the pre-coding matrix of even number or odd number;

No matter adopt code book enhanced scheme 1 or adopt code book enhanced scheme 2, the pre-coding matrix (or getting the pre-coding matrix that the first code book index is odd number) that the first code book index is even number is got in code book after enhancing, quantification beam direction can be made to carry out even rarefaction, therefore, 4 antenna codebooks (namely adopting mode two to compress 4 antenna codebooks) after adopting compression under dual-polarized array affect minimum with adopting 4 antenna codebooks before compressing on a PMI and the 2nd PMI feedback performance.

Illustrate, when getting 16, RI=1 for N, 4 antenna codebooks adopting code book enhanced scheme 1 or code book enhanced scheme 2 to be formed can the structure of boil down to as shown in table 9A or as shown in table 9B:

Table 9A

Table 9B

Illustrate, when getting 16, RI=2 for N, 4 antenna codebooks adopting code book enhanced scheme 1 to be formed can the structure of boil down to as shown in table 10A:

Table 10A

It should be noted that, when RI=2,4 antenna codebooks adopting code book enhanced scheme 1 to be formed can only comprise structure and the similar of table shown in 10A of the pre-coding matrix that the first code book index is odd number in the first pre-coding matrix set before compression by boil down to, will not enumerate herein.

Illustrate, when getting 16, RI=2 for N, 4 antenna codebooks adopting code book enhanced scheme 2 to be formed can the structure of boil down to as shown in table 10B:

Table 10B

It should be noted that, when RI=2,4 antenna codebooks adopting code book enhanced scheme 2 to be formed can only comprise structure and the similar of table shown in 10B of the pre-coding matrix that the first code book index is odd number in the first pre-coding matrix set before compression by boil down to, will not enumerate herein.

Under which, in 4 antenna codebooks after compression, the first code book index can continue to use the first code book index that in the first pre-coding matrix set before compression, pre-coding matrix is corresponding, as in 4 antenna codebooks after this compression, the first code book index is 0, 2, 4, 14 or 1, 3, 5, 15, also (namely redefining the first code book index that each pre-coding matrix is corresponding) can be renumberd for the pre-coding matrix comprised the first pre-coding matrix set after compression, as in 4 antenna codebooks after this compression, the first code book index is 0 ~ 8, as long as ensure that terminal and base station are consistent to the understanding of the first code book index in 4 antenna codebooks after compressing.

It should be noted that, under which, based on the first code book index shown in table 3A, table 3B, table 4A and table 4B, the second code book index and pre-coding matrix corresponding sequentially, get 16 for N, in 4 antenna codebooks after compression, the first code book index corresponds to the pre-coding matrix set W that comprises 8 pre-coding matrixes 1, as:

W 1 = X n 0 0 X n , X n = 1 1 1 1 q 1 n q 1 n + 8 q 1 n + 16 q 1 n + 24 , q 1 = e j 2 π / 32 , n = 0 , 2,4 , . . . , 14 ;

Or,

W 1 = X n 0 0 X n , X n = 1 1 1 1 q 1 n q 1 n + 8 q 1 n + 16 q 1 n + 24 , q 1 = e j 2 π / 32 , n = 1,3,5 , . . . , 15 ;

16 equally spaced DFT vectors are comprised in 4 antenna codebooks after this compress mode ensure that compression v m = 1 e j 2 πm / 32 T , m = 0 , 2 , . . . , 1 4 or v m = 1 e j 2 πm / 32 T , m = 1,3 , . . . , 15 .

In order to improve the transmission reliability of PUCCH further, the information bit of the combined coding value of RI and a PMI can be reduced further, such as, the information bit of the combined coding value of a RI and PMI is reduced to 4 bits, preferably, the first pre-coding matrix set after this compression can also adopt following preferred structure:

Mode three, arbitrarily choose employing mode one or employing mode two compress after the first pre-coding matrix set in part pre-coding matrix, using the pre-coding matrix chosen as the first pre-coding matrix set after final compression.

Such as, from the first pre-coding matrix set after employing mode one or employing mode two are compressed, choosing arbitrarily 7 pre-coding matrixes as the first pre-coding matrix set after final compression, is 4 bits to make the information bit of the combined coding value of RI and a PMI.

Illustrate, when RI=1, the first pre-coding matrix set after compressing employing mode one is compressed further, obtains the structure as shown in table 11A, wherein, adopts code book enhanced scheme 1 or 2;

Show 11A:RI=1 and adopt code book enhanced scheme 1 or 2

Illustrate, when getting 16, RI=2 for N, the first pre-coding matrix set after compressing employing mode one is compressed further, obtains the structure as shown in table 11B, wherein, adopts code book enhanced scheme 1;

Show 11B:RI=2 and adopt code book enhanced scheme 1

Illustrate, when getting 16, RI=2 for N, the first pre-coding matrix set after compressing employing mode one is compressed further, obtains the structure as shown in table 11C, wherein, adopts code book enhanced scheme 2:

Show 11C:RI=2 and adopt code book enhanced scheme 2

In force, 4 antenna codebooks after this compression adopt following structure:

Order the first pre-coding matrix set that to be the first pre-coding matrix set that in the code book of 1, first code book index is corresponding be after compression; And/or,

Order the first pre-coding matrix set that to be the first pre-coding matrix set that in the code book of 2, first code book index is corresponding be after compression.

Specifically comprise following situation:

One, in this 4 antenna codebook, order is either type compression in the code book employing aforesaid way one ~ mode three of 1, and the code book that order is 2 does not compress;

Two, in this 4 antenna codebook, order is either type compression in the code book employing aforesaid way one ~ mode three of 1, and the code book that order is 2 adopts either type compression in aforesaid way one ~ mode three;

Three, in this 4 antenna codebook, order be 1 code book do not compress, and the code book that order is 2 adopts either type compression in aforesaid way one ~ mode three.

Further, in step 12, terminal is according to the combined coding rule of setting, and determine the combined coding value that this RI is corresponding with a PMI of the first code book index being used to indicate this pre-coding matrix, wherein, the combined coding rule of setting specifically comprises:

If order is the first pre-coding matrix set that in the code book of 1, first code book index is corresponding is the first pre-coding matrix set after compression, the combined coding value that then in this combined coding rule, RI=1 is corresponding and the number of the first code book index are all identical with the number of the pre-coding matrix that the first pre-coding matrix set after compression comprises, and the first code book index that each combined coding value correspondence one is different;

If order is the first pre-coding matrix set that in the code book of 2, first code book index is corresponding is the first pre-coding matrix set after compression, the combined coding value that then in this combined coding rule, RI=2 is corresponding and the number of the first code book index are all identical with the number of the pre-coding matrix that the first pre-coding matrix set after compression comprises, and the first code book index that each combined coding value correspondence one is different.

Get 16 for N, illustrate this combined coding rule:

1, the code book of RI=1 adopts mode one to compress, and the code book of RI=2 does not compress, then totally 5 bit informations after RI and a PMI combined coding, and corresponding combined coding rule is as shown shown in 12A:

Table 12A

2, the code book of RI=1 and the code book of RI=2 all adopt mode one to compress, then totally 5 bit informations after RI and a PMI combined coding, and corresponding combined coding rule is as shown in table 12B:

Table 12B

3, the code book of RI=1 does not compress, and the code book of RI=2 adopts mode one to compress, then totally 5 bit informations after RI and a PMI combined coding, and corresponding combined coding rule is as shown in table 12C:

Table 12C

4, the code book of RI=1 adopts mode one to compress, and the code book of RI=2 does not compress, then totally 5 bit informations after RI and a PMI combined coding, and corresponding combined coding rule is as shown in table 12D:

Table 12D

5, the code book of RI=1 adopts mode two to compress, and the code book of RI=2 adopts mode one to compress, then totally 5 bit informations after RI and a PMI combined coding, and corresponding combined coding rule is as shown in table 12E:

Table 12E

6, the code book of RI=1 adopts mode two to compress, and the code book of RI=2 adopts mode two to compress, then totally 5 bit informations after RI and a PMI combined coding, and corresponding combined coding rule is as shown in table 12F:

Table 12F

7, the code book of RI=1 does not compress, and the code book of RI=2 adopts mode two to compress, then totally 5 bit informations after RI and a PMI combined coding, and corresponding combined coding rule is as shown in table 12G:

Table 12G

8, the code book of RI=1 and the code book of RI=2 all adopt mode three to compress, and the code book of RI=2 adopts mode three to compress, then totally 4 bit informations after RI and a PMI combined coding, and corresponding combined coding rule is as shown in table 12H:

Table 12H

It should be noted that, below 8 kinds of preferred code book compression schemes are only listed, according to the compress mode (i.e. mode one ~ mode three) that the embodiment of the present invention provides, also comprise other code book compression schemes, code book as RI=1 adopts mode one to carry out compressing and the code book of RI=2 adopts mode two to compress, and for example, the code book of RI=1 adopts mode three to carry out compressing and the code book of RI=2 adopts mode two to compress, for another example, the code book of RI=1 adopts mode three to carry out compressing and the code book of RI=2 does not compress, etc., due to the combined coding rule combined coding Regularia corresponding with above-mentioned 8 kinds of preferred code book compression schemes seemingly, illustrate no longer one by one herein.

In the embodiment of the present invention, the structure of 4 antenna codebooks after the compression that terminal and base station use, rear informing base station can be determined by terminal, also rear notification terminal can be determined by base station, can also be arranged by terminal and base station, can also specify in agreement or standard, as long as can ensure between terminal with base station consistent to the Structure Understanding of 4 antenna codebooks after used compression;

The combined coding rule of setting, rear informing base station can be determined by terminal, also rear notification terminal can be determined by base station, can also be arranged by terminal and base station, can also specify in agreement or standard, as long as can ensure between terminal with base station consistent to the combined coding rule understanding of setting.

Based on above-described embodiment, the embodiment of the present invention additionally provides a kind of method of reseptance of the channel condition information based on code book, and shown in Figure 2, the method comprises:

Step 21, base station send indication information to terminal, and this indication information is used to indicate terminal feedback channel condition information and this feeds back the feedback model used;

Preferably, this indication information can pass through control signal (as DCI) transmission.

Step 22, base station are according to this feedback model, in the feedback moment of setting, the combined coding value of RI and a PMI that receiving terminal sends, another feedback reception terminal transmission be used to indicate compression after 4 antenna codebooks in the 2nd PMI and CQI of the second code book index of pre-coding matrix;

Step 23, base station, according to the combined coding rule of setting, determine the first code book index of the RI that the combined coding value that receives is corresponding and this pre-coding matrix.

Wherein, the combined coding value I of RI and a PMI is defined in this combined coding rule rI/PMI1, the first code book index (i of pre-coding matrix in 4 antenna codebooks after RI and compression 1) between corresponding relation.

Further, in 4 antenna codebooks of base station after determining the compression that terminal sends after the first code book index of pre-coding matrix and the second code book index, just can determine the pre-coding matrix that terminal is recommended from 4 antenna codebooks after compressing.

In the embodiment of the present invention, 4 antenna codebooks refer under the configuration of 4 pilot frequency port for carry out pre-coding matrix indication information feedback and comprise the code book of the first code book index and the second code book index, the span of the first code book index is 0 ~ N-1, wherein N be greater than 1 integer; 4 antenna codebooks after this compression refer to the code book obtained after the first pre-coding matrix set corresponding to the first code book index in this 4 antenna codebook is compressed, and the first pre-coding matrix set after this compression comprises the part pre-coding matrix in the first pre-coding matrix set before compression.

In force, the first pre-coding matrix set after compression adopts following arbitrary preferred structure:

Mode one, by compression before the first pre-coding matrix set in pre-coding matrix be divided into group, two pre-coding matrixes that wherein often group comprises have identical discrete Fourier transform DFT vector; One is chosen arbitrarily, as the pre-coding matrix in the first pre-coding matrix set after compression from the pre-coding matrix that often group comprises; Specifically refer to the description of end side, repeat no more herein.

Mode two, by compression before the first pre-coding matrix set in pre-coding matrix be divided into group, wherein, often the first row DFT vector of two pre-coding matrixes comprising of group is adjacent DFT vector; Prelist from every group; Specifically refer to the description of end side, repeat no more herein.

In order to improve the transmission reliability of PUCCH further, the information bit of the combined coding value of RI and a PMI can be reduced further, such as, the information bit of the combined coding value of a RI and PMI is reduced to 4 bits, preferably, the first pre-coding matrix set after this compression can also adopt following preferred structure:

Mode three, choose part pre-coding matrix in the first pre-coding matrix set after compression arbitrarily, using the pre-coding matrix chosen as the first pre-coding matrix set after final compression; Specifically see the description of end side, repeat no more herein.

Such as, from the first pre-coding matrix set after employing mode one or employing mode two are compressed, choosing arbitrarily 7 pre-coding matrixes as the first pre-coding matrix set after final compression, is 4 bits to make the information bit of the combined coding value of RI and a PMI.

In force, 4 antenna codebooks after this compression adopt following structure:

Order the first pre-coding matrix set that to be the first pre-coding matrix set that in the code book of 1, first code book index is corresponding be after compression; And/or,

Order the first pre-coding matrix set that to be the first pre-coding matrix set that in the code book of 2, first code book index is corresponding be after compression.

Specifically comprise following situation:

One, in this 4 antenna codebook, order is either type compression in the code book employing aforesaid way one ~ mode three of 1, and the code book that order is 2 does not compress;

Two, in this 4 antenna codebook, order is either type compression in the code book employing aforesaid way one ~ mode three of 1, and the code book that order is 2 adopts either type compression in aforesaid way one ~ mode three;

Three, in this 4 antenna codebook, order be 1 code book do not compress, and the code book that order is 2 adopts either type compression in aforesaid way one ~ mode three.

Further, if order is the first pre-coding matrix set that in the code book of 1, first code book index is corresponding is the first pre-coding matrix set after compression, the combined coding value that then in this combined coding rule, RI=1 is corresponding and the number of the first code book index are all identical with the number of the pre-coding matrix that the first pre-coding matrix set after compression comprises, and the first code book index that each combined coding value correspondence one is different, specifically see the description of end side;

If order is the first pre-coding matrix set that in the code book of 2, first code book index is corresponding is the first pre-coding matrix set after compression, the combined coding value that then in this combined coding rule, RI=2 is corresponding and the number of the first code book index are all identical with the number of the pre-coding matrix that the first pre-coding matrix set after compression comprises, and the first code book index that each combined coding value correspondence one is different, specifically see the description of end side.

Said method handling process can realize with software program, and this software program can be stored in storage medium, when the software program stored is called, performs said method step.

Based on same inventive concept, a kind of terminal is additionally provided in the embodiment of the present invention, the principle of dealing with problems due to this terminal is similar to the sending method of the above-mentioned channel condition information based on code book, therefore the enforcement of this terminal see the enforcement of the sending method of the channel condition information based on code book, can repeat part and repeats no more.

Shown in Figure 3, the terminal that the embodiment of the present invention provides, comprising:

First determination module 31, for after the indication information receiving base station transmission, from 4 antenna codebooks after compression, the pre-coding matrix determined RI and use;

Second determination module 32, for the combined coding rule according to setting, determines the combined coding value that RI that the first determination module 31 is determined is corresponding with a PMI of the first code book index being used to indicate this pre-coding matrix;

Feedback module 33, for according to the feedback model indicated in indication information, in the feedback moment of setting, the combined coding value determined is sent to base station, in the feedback moment of another setting, the 2nd PMI and channel quality indicator (CQI) that are used to indicate the second code book index of this pre-coding matrix are sent to base station;

Wherein, 4 antenna codebooks refer under the configuration of 4 pilot frequency port for carry out pre-coding matrix indication information feedback and comprise the code book of the first code book index and the second code book index, the span of the first code book index is 0 ~ N-1, wherein N be greater than 1 integer; 4 antenna codebooks after compression refer to the code book obtained after the first pre-coding matrix set corresponding to the first code book index in 4 antenna codebooks is compressed, and the first pre-coding matrix set after compression comprises the part pre-coding matrix in the first pre-coding matrix set before compression.

Preferably, the first pre-coding matrix set after compression adopts following arbitrary preferred structure:

Mode one, by compression before the first pre-coding matrix set in pre-coding matrix be divided into group, two pre-coding matrixes that wherein often group comprises have identical discrete Fourier transform DFT vector; One is chosen arbitrarily, as the pre-coding matrix in the first pre-coding matrix set after compression from the pre-coding matrix that often group comprises;

Mode two, by compression before the first pre-coding matrix set in pre-coding matrix be divided into group, wherein, often the first row DFT vector of two pre-coding matrixes comprising of group is adjacent DFT vector; One is chosen arbitrarily, as the pre-coding matrix in the first pre-coding matrix set after compression from often organizing pre-coding matrix.。

Preferably, the first pre-coding matrix set after compression can also adopt following preferred structure:

Mode three, choose part pre-coding matrix in the first pre-coding matrix set after compression arbitrarily, using the pre-coding matrix chosen as the first pre-coding matrix set after final compression.

Preferably, 4 antenna codebooks after compression adopt following structure:

Order the first pre-coding matrix set that to be the first pre-coding matrix set that in the code book of 1, first code book index is corresponding be after compression; And/or,

Order the first pre-coding matrix set that to be the first pre-coding matrix set that in the code book of 2, first code book index is corresponding be after compression.

Further, if order is the first pre-coding matrix set that in the code book of 1, first code book index is corresponding is the first pre-coding matrix set after compression, the combined coding value that then in this combined coding rule, RI=1 is corresponding and the number of the first code book index are all identical with the number of the pre-coding matrix that the first pre-coding matrix set after compression comprises, and the first code book index that each combined coding value correspondence one is different;

If order is the first pre-coding matrix set that in the code book of 2, first code book index is corresponding is the first pre-coding matrix set after compression, the combined coding value that then in this combined coding rule, RI=2 is corresponding and the number of the first code book index are all identical with the number of the pre-coding matrix that the first pre-coding matrix set after compression comprises, and the first code book index that each combined coding value correspondence one is different.

Based on same inventive concept, a kind of base station is additionally provided in the embodiment of the present invention, the principle of dealing with problems due to this base station is similar to the method for reseptance of the above-mentioned channel condition information based on code book, therefore the enforcement of this base station see the enforcement of the method for reseptance of the channel condition information based on code book, can repeat part and repeats no more.

Shown in Figure 4, the base station that the embodiment of the present invention provides, comprising:

Sending module 41, for sending indication information to terminal, indication information is used to indicate terminal feedback channel condition information and this feeds back the feedback model used;

Receiver module 42, for according to this feedback model, in the feedback moment of setting, the combined coding value of RI and a PMI that receiving terminal sends, and another setting the transmission of feedback reception terminal be used to indicate compression after 4 antenna codebooks in the 2nd PMI and CQI of the second code book index of pre-coding matrix;

Processing module 43, for the combined coding rule according to setting, determines the first code book index of the RI that the combined coding value that receives is corresponding and this pre-coding matrix;

Wherein, 4 antenna codebooks refer under the configuration of 4 pilot frequency port for carry out pre-coding matrix indication information feedback and comprise the code book of the first code book index and the second code book index, the span of the first code book index is 0 ~ N-1, wherein N be greater than 1 integer; 4 antenna codebooks after compression refer to the code book obtained after the first pre-coding matrix set corresponding to the first code book index in 4 antenna codebooks is compressed, and the first pre-coding matrix set after compression comprises the part pre-coding matrix in the first pre-coding matrix set before compression.

Preferably, the first pre-coding matrix set after compression adopts following arbitrary preferred structure:

Mode one, by compression before the first pre-coding matrix set in pre-coding matrix be divided into group, two pre-coding matrixes that wherein often group comprises have identical discrete Fourier transform DFT vector; One is chosen arbitrarily, as the pre-coding matrix in the first pre-coding matrix set after compression from the pre-coding matrix that often group comprises;

Mode two, by compression before the first pre-coding matrix set in pre-coding matrix be divided into group, wherein, often the first row DFT vector of two pre-coding matrixes comprising of group is adjacent DFT vector; One is chosen arbitrarily, as the pre-coding matrix in the first pre-coding matrix set after compression from often organizing pre-coding matrix.

Preferably, the first pre-coding matrix set after compression can also adopt following structure:

Mode three, choose part pre-coding matrix in the first pre-coding matrix set after compression arbitrarily, using the pre-coding matrix chosen as the first pre-coding matrix set after final compression.

Preferably, 4 antenna codebooks after compression comprise:

Order the first pre-coding matrix set that to be the first pre-coding matrix set that in the code book of 1, first code book index is corresponding be after compression; And/or,

Order the first pre-coding matrix set that to be the first pre-coding matrix set that in the code book of 2, first code book index is corresponding be after compression.

Further, if order is the first pre-coding matrix set that in the code book of 1, first code book index is corresponding is the first pre-coding matrix set after compression, the combined coding value that then in this combined coding rule, RI=1 is corresponding and the number of the first code book index are all identical with the number of the pre-coding matrix that the first pre-coding matrix set after compression comprises, and the first code book index that each combined coding value correspondence one is different;

If order is the first pre-coding matrix set that in the code book of 2, first code book index is corresponding is the first pre-coding matrix set after compression, the combined coding value that then in this combined coding rule, RI=2 is corresponding and the number of the first code book index are all identical with the number of the pre-coding matrix that the first pre-coding matrix set after compression comprises, and the first code book index that each combined coding value correspondence one is different.

Below in conjunction with particular hardware structure, the structure of the terminal that the embodiment of the present invention provides, processing mode are described.

Shown in Figure 5, this terminal at least comprises: memory 51, processor 52 and antenna 53, wherein:

4 antenna codebooks after compression are at least stored in memory 51, and the combined coding rule of setting;

Antenna 53 receives the indication information that base station sends, and Trigger processor 52 performs the feedback of channel condition information;

Processor 52 under the triggering of antenna 53, from memory 51 store compression after 4 antenna codebooks in, the pre-coding matrix determined RI and use; According to the combined coding rule of the setting stored in memory 51, determine the combined coding value that this RI is corresponding with a PMI of the first code book index being used to indicate this pre-coding matrix, and the feedback model indicated in the indication information received according to antenna 53, marker antenna 53 is in the feedback moment of setting, the combined coding value self determined sends to base station, in the feedback moment of another setting, the 2nd PMI and CQI being used to indicate the second code book index of this pre-coding matrix is sent to base station.

Wherein, 4 antenna codebooks refer under the configuration of 4 pilot frequency port for carry out pre-coding matrix indication information feedback and comprise the code book of the first code book index and the second code book index, the span of the first code book index is 0 ~ N-1, wherein N be greater than 1 integer; 4 antenna codebooks after compression refer to the code book obtained after the first pre-coding matrix set corresponding to the first code book index in 4 antenna codebooks is compressed, and the first pre-coding matrix set after this compression comprises the part pre-coding matrix in the first pre-coding matrix set before compression.

It should be noted that, the concrete structure of the first pre-coding matrix set after compression, and the combined coding rule of setting is see the description of method part, repeats no more herein.

Shown in Figure 6, this base station at least comprises: memory 61, processor 62 and antenna 63, wherein:

4 antenna codebooks after compression are at least stored in memory 61, and the combined coding rule of setting;

Antenna 63, under the triggering of processor 62, sends indication information to terminal, and this indication information is used to indicate terminal feedback channel condition information and this feeds back the feedback model used; And under the triggering of processor 62, according to this feedback model, in the feedback moment of setting, the combined coding value of the RI that receiving terminal sends and a PMI, feedback reception terminal of another setting send be used to indicate compression after 4 antenna codebooks in the 2nd PMI and CQI of the second code book index of pre-coding matrix, and Trigger processor 62 works;

Processor 62 is under the triggering of antenna 63, the combined coding rule of the setting stored from memory 61, determine the RI that the combined coding value that receives is corresponding and the first code book index, further, in 4 antenna codebooks after the compression stored from memory 61, determine the first code book index of receiving and pre-coding matrix corresponding to the second code book index.

Wherein, 4 antenna codebooks refer under the configuration of 4 pilot frequency port for carry out pre-coding matrix indication information feedback and comprise the code book of the first code book index and the second code book index, the span of the first code book index is 0 ~ N-1, wherein N be greater than 1 integer; 4 antenna codebooks after compression refer to the code book obtained after the first pre-coding matrix set corresponding to the first code book index in 4 antenna codebooks is compressed, and the first pre-coding matrix set after this compression comprises the part pre-coding matrix in the first pre-coding matrix set before compression.

It should be noted that, the concrete structure of the first pre-coding matrix set after compression, and the combined coding rule of setting is see the description of method part, repeats no more herein.

Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.

The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.

Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims (20)

1. based on a sending method for the channel condition information of code book, it is characterized in that, the method comprises:
Terminal, after the indication information receiving base station transmission, from 4 antenna codebooks after compression, determines the pre-coding matrix that order indicates RI and uses;
Described terminal, according to the combined coding rule of setting, determines the combined coding value that described RI indicates PMI corresponding with the first pre-coding matrix of the first code book index being used to indicate described pre-coding matrix;
Described terminal is according to the feedback model indicated in described indication information, in the feedback moment of setting, the combined coding value determined is sent to described base station, in the feedback moment of another setting, the 2nd PMI and channel quality indicator (CQI) that are used to indicate the second code book index of described pre-coding matrix are sent to described base station;
Wherein, 4 antenna codebooks refer under the configuration of 4 pilot frequency port for carry out pre-coding matrix indication feedback and comprise the code book of the first code book index and the second code book index, the span of the first code book index is 0 ~ N-1, wherein N be greater than 1 integer; 4 antenna codebooks after described compression refer to the code book obtained after the first pre-coding matrix set corresponding to the first code book index in described 4 antenna codebooks is compressed, and the first pre-coding matrix set after described compression comprises the part pre-coding matrix in the first pre-coding matrix set before compression.
2. the method for claim 1, is characterized in that, the first pre-coding matrix set after described compression is:
Mode one, the pre-coding matrix in the first pre-coding matrix set before described compression to be divided into group, two pre-coding matrixes that wherein often group comprises have identical discrete Fourier transform DFT vector; One is chosen arbitrarily, as the pre-coding matrix in the first pre-coding matrix set after compression from the pre-coding matrix that often group comprises;
Or,
Mode two, the pre-coding matrix in the first pre-coding matrix set before described compression to be divided into group, wherein, often the first row DFT vector of two pre-coding matrixes comprising of group is adjacent DFT vector; One is chosen arbitrarily, as the pre-coding matrix in the first pre-coding matrix set after compression from often organizing pre-coding matrix.
3. method as claimed in claim 2, it is characterized in that, the first pre-coding matrix set after described compression adopts following structure:
Mode three, choose part pre-coding matrix in the first pre-coding matrix set after described compression arbitrarily, using the pre-coding matrix chosen as the first pre-coding matrix set after final compression.
4. the method as described in any one of claims 1 to 3, is characterized in that, 4 antenna codebooks after described compression adopt following structure:
Order the first pre-coding matrix set that to be the first pre-coding matrix set that in the code book of 1, first code book index is corresponding be after compression; And/or,
Order the first pre-coding matrix set that to be the first pre-coding matrix set that in the code book of 2, first code book index is corresponding be after compression.
5. method as claimed in claim 4, is characterized in that,
If order is the first pre-coding matrix set that in the code book of 1, first code book index is corresponding is the first pre-coding matrix set after compression, the combined coding value that then in described combined coding rule, RI=1 is corresponding and the number of the first code book index all identical with the number of the pre-coding matrix that the first pre-coding matrix set after described compression comprises, and corresponding different first code book index of each combined coding value;
If order is the first pre-coding matrix set that in the code book of 2, first code book index is corresponding is the first pre-coding matrix set after compression, the combined coding value that then in described combined coding rule, RI=2 is corresponding and the number of the first code book index all identical with the number of the pre-coding matrix that the first pre-coding matrix set after described compression comprises, and corresponding different first code book index of each combined coding value.
6. based on a method of reseptance for the channel condition information of code book, it is characterized in that, the method comprises:
Base station sends indication information to terminal, and described indication information is used to indicate described terminal feedback channel condition information and this feeds back the feedback model used;
Described base station is according to described feedback model, in the feedback moment of setting, receive the combined coding value of RI and the PMI that described terminal sends, and terminal transmission described in feedback reception of another setting be used to indicate compression after 4 antenna codebooks in the 2nd PMI and CQI of the second code book index of pre-coding matrix;
The first code book index of the RI that the combined coding value that receives is corresponding and described pre-coding matrix, according to the combined coding rule of setting, is determined in described base station;
Wherein, 4 antenna codebooks refer under the configuration of 4 pilot frequency port for carry out pre-coding matrix indication information feedback and comprise the code book of the first code book index and the second code book index, the span of the first code book index is 0 ~ N-1, wherein N be greater than 1 integer; 4 antenna codebooks after described compression refer to the code book obtained after the first pre-coding matrix set corresponding to the first code book index in described 4 antenna codebooks is compressed, and the first pre-coding matrix set after described compression comprises the part pre-coding matrix in the first pre-coding matrix set before compression.
7. method as claimed in claim 6, it is characterized in that, the first pre-coding matrix set after described compression adopts following structure:
Mode one, the pre-coding matrix in the first pre-coding matrix set before described compression to be divided into group, two pre-coding matrixes that wherein often group comprises have identical discrete Fourier transform DFT vector; One is chosen arbitrarily, as the pre-coding matrix in the first pre-coding matrix set after compression from the pre-coding matrix that often group comprises;
Or,
Mode two, the pre-coding matrix in the first pre-coding matrix set before described compression to be divided into group, wherein, often the first row DFT vector of two pre-coding matrixes comprising of group is adjacent DFT vector; One is chosen arbitrarily, as the pre-coding matrix in the first pre-coding matrix set after compression from often organizing pre-coding matrix.
8. method as claimed in claim 7, it is characterized in that, the first pre-coding matrix set after described compression adopts following structure:
Mode three, choose part pre-coding matrix in the first pre-coding matrix set after described compression arbitrarily, using the pre-coding matrix chosen as the first pre-coding matrix set after final compression.
9. the method as described in any one of claim 6 ~ 8, is characterized in that, 4 antenna codebooks after described compression adopt following structure:
Order the first pre-coding matrix set that to be the first pre-coding matrix set that in the code book of 1, first code book index is corresponding be after compression; And/or,
Order the first pre-coding matrix set that to be the first pre-coding matrix set that in the code book of 2, first code book index is corresponding be after compression.
10. method as claimed in claim 9, is characterized in that,
If order is the first pre-coding matrix set that in the code book of 1, first code book index is corresponding is the first pre-coding matrix set after compression, the combined coding value that then in described combined coding rule, RI=1 is corresponding and the number of the first code book index all identical with the number of the pre-coding matrix that the first pre-coding matrix set after described compression comprises, and corresponding different first code book index of each combined coding value;
If order is the first pre-coding matrix set that in the code book of 2, first code book index is corresponding is the first pre-coding matrix set after compression, the combined coding value that then in described combined coding rule, RI=2 is corresponding and the number of the first code book index all identical with the number of the pre-coding matrix that the first pre-coding matrix set after described compression comprises, and corresponding different first code book index of each combined coding value.
11. 1 kinds of terminals, is characterized in that, this terminal comprises:
First determination module, for after the indication information receiving base station transmission, from 4 antenna codebooks after compression, the pre-coding matrix determined RI and use;
Second determination module, for the combined coding rule according to setting, determines the combined coding value that described RI indicates PMI corresponding with the first pre-coding matrix of the first code book index being used to indicate described pre-coding matrix;
Feedback module, for according to the feedback model indicated in described indication information, in the feedback moment of setting, the combined coding value determined is sent to described base station, in the feedback moment of another setting, the 2nd PMI and channel quality indicator (CQI) that are used to indicate the second code book index of described pre-coding matrix are sent to described base station;
Wherein, 4 antenna codebooks refer under the configuration of 4 pilot frequency port for carry out pre-coding matrix indication feedback and comprise the code book of the first code book index and the second code book index, the span of the first code book index is 0 ~ N-1, wherein N be greater than 1 integer; 4 antenna codebooks after described compression refer to the code book obtained after the first pre-coding matrix set corresponding to the first code book index in described 4 antenna codebooks is compressed, and the first pre-coding matrix set after described compression comprises the part pre-coding matrix in the first pre-coding matrix set before compression.
12. terminals as claimed in claim 11, is characterized in that, the first pre-coding matrix set after described compression adopts following structure:
Mode one, the pre-coding matrix in the first pre-coding matrix set before described compression to be divided into group, two pre-coding matrixes that wherein often group comprises have identical discrete Fourier transform DFT vector; One is chosen arbitrarily, as the pre-coding matrix in the first pre-coding matrix set after compression from the pre-coding matrix that often group comprises;
Or,
Mode two, the pre-coding matrix in the first pre-coding matrix set before described compression to be divided into group, wherein, often the first row DFT vector of two pre-coding matrixes comprising of group is adjacent DFT vector; One is chosen arbitrarily, as the pre-coding matrix in the first pre-coding matrix set after compression from often organizing pre-coding matrix.
13. terminals as claimed in claim 12, is characterized in that, the first pre-coding matrix set after described compression adopts following structure:
Mode three, choose part pre-coding matrix in the first pre-coding matrix set after described compression arbitrarily, using the pre-coding matrix chosen as the first pre-coding matrix set after final compression.
14. terminals as described in any one of claim 11 ~ 13, it is characterized in that, 4 antenna codebooks after described compression adopt following structure:
Order the first pre-coding matrix set that to be the first pre-coding matrix set that in the code book of 1, first code book index is corresponding be after compression; And/or,
Order the first pre-coding matrix set that to be the first pre-coding matrix set that in the code book of 2, first code book index is corresponding be after compression.
15. terminals as claimed in claim 14, is characterized in that,
If order is the first pre-coding matrix set that in the code book of 1, first code book index is corresponding is the first pre-coding matrix set after compression, the combined coding value that then in described combined coding rule, RI=1 is corresponding and the number of the first code book index all identical with the number of the pre-coding matrix that the first pre-coding matrix set after described compression comprises, and corresponding different first code book index of each combined coding value;
If order is the first pre-coding matrix set that in the code book of 2, first code book index is corresponding is the first pre-coding matrix set after compression, the combined coding value that then in described combined coding rule, RI=2 is corresponding and the number of the first code book index all identical with the number of the pre-coding matrix that the first pre-coding matrix set after described compression comprises, and corresponding different first code book index of each combined coding value.
16. 1 kinds of base stations, is characterized in that, this base station comprises:
Sending module, for sending indication information to terminal, described indication information is used to indicate described terminal feedback channel condition information and this feeds back the feedback model used;
Receiver module, for according to described feedback model, in the feedback moment of setting, receive the combined coding value of RI and the PMI that described terminal sends, and terminal transmission described in feedback reception of another setting be used to indicate compression after 4 antenna codebooks in the 2nd PMI and CQI of the second code book index of pre-coding matrix;
Processing module, for the combined coding rule according to setting, determines the first code book index of the RI that the combined coding value that receives is corresponding and described pre-coding matrix;
Wherein, 4 antenna codebooks refer under the configuration of 4 pilot frequency port for carry out pre-coding matrix indication information feedback and comprise the code book of the first code book index and the second code book index, the span of the first code book index is 0 ~ N-1, wherein N be greater than 1 integer; 4 antenna codebooks after described compression refer to the code book obtained after the first pre-coding matrix set corresponding to the first code book index in described 4 antenna codebooks is compressed, and the first pre-coding matrix set after described compression comprises the part pre-coding matrix in the first pre-coding matrix set before compression.
17. base stations as claimed in claim 16, is characterized in that, the first pre-coding matrix set after described compression adopts following structure:
Mode one, the pre-coding matrix in the first pre-coding matrix set before described compression to be divided into group, two pre-coding matrixes that wherein often group comprises have identical discrete Fourier transform DFT vector; One is chosen arbitrarily, as the pre-coding matrix in the first pre-coding matrix set after compression from the pre-coding matrix that often group comprises;
Or,
Mode two, the pre-coding matrix in the first pre-coding matrix set before described compression to be divided into group, wherein, often the first row DFT vector of two pre-coding matrixes comprising of group is adjacent DFT vector; One is chosen arbitrarily, as the pre-coding matrix in the first pre-coding matrix set after compression from often organizing pre-coding matrix.
18. base stations as claimed in claim 17, is characterized in that, the first pre-coding matrix set after described compression adopts following structure:
Mode three, choose part pre-coding matrix in the first pre-coding matrix set after described compression arbitrarily, using the pre-coding matrix chosen as the first pre-coding matrix set after final compression.
19. base stations as described in any one of claim 16 ~ 18, it is characterized in that, 4 antenna codebooks after described compression adopt following structure:
Order the first pre-coding matrix set that to be the first pre-coding matrix set that in the code book of 1, first code book index is corresponding be after compression; And/or,
Order the first pre-coding matrix set that to be the first pre-coding matrix set that in the code book of 2, first code book index is corresponding be after compression.
20. base stations as claimed in claim 19, is characterized in that,
If order is the first pre-coding matrix set that in the code book of 1, first code book index is corresponding is the first pre-coding matrix set after compression, the combined coding value that then in described combined coding rule, RI=1 is corresponding and the number of the first code book index all identical with the number of the pre-coding matrix that the first pre-coding matrix set after described compression comprises, and corresponding different first code book index of each combined coding value;
If order is the first pre-coding matrix set that in the code book of 2, first code book index is corresponding is the first pre-coding matrix set after compression, the combined coding value that then in described combined coding rule, RI=2 is corresponding and the number of the first code book index all identical with the number of the pre-coding matrix that the first pre-coding matrix set after described compression comprises, and corresponding different first code book index of each combined coding value.
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CN107888323A (en) * 2016-09-29 2018-04-06 电信科学技术研究院 The transmission method and equipment of a kind of channel condition information
CN107888323B (en) * 2016-09-29 2020-01-17 电信科学技术研究院 Method and device for transmitting channel state information
US10644767B2 (en) 2016-09-29 2020-05-05 China Academy Of Telecommunications Technology Channel state information transmission method and device for determining a pre-coding matrix for downlink transmission
WO2018228486A1 (en) * 2017-06-16 2018-12-20 Qualcomm Incorporated Channel state information feedback for semi-open-loop and open-loop schemes
WO2020119715A1 (en) * 2018-12-11 2020-06-18 Qualcomm Incorporated Compressed csi feedback for non-contiguous frequency resources

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