WO2012037772A1 - 一种信道状态信息反馈方法和终端 - Google Patents
一种信道状态信息反馈方法和终端 Download PDFInfo
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- WO2012037772A1 WO2012037772A1 PCT/CN2011/001264 CN2011001264W WO2012037772A1 WO 2012037772 A1 WO2012037772 A1 WO 2012037772A1 CN 2011001264 W CN2011001264 W CN 2011001264W WO 2012037772 A1 WO2012037772 A1 WO 2012037772A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0417—Feedback systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0636—Feedback format
- H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
Definitions
- the present invention relates to the field of communications, and in particular, to a channel state information feedback method and terminal.
- a transmitting end and a receiving end use a plurality of antennas to obtain a higher rate in a spatial multiplexing manner.
- an enhanced technology is that the receiving end feeds channel information to the transmitting end, and the transmitting end uses some transmitting precoding techniques according to the obtained channel information, which greatly improves the transmission performance.
- M1MO single-user multi-input multi-output
- channel feature vector information is used for precoding directly; for multi-user MIMO, more accurate channel information is needed.
- the feedback of channel information is mainly a feedback method using a simple single codebook, and the performance of the MIMO transmit precoding technique depends more on the accuracy of the codebook feedback.
- the code word number is called PMT (Prec. odmg Matnx Tndicator, precoding matrix indicator). The transmitting end finds the corresponding precoding codeword according to the serial number ⁇ , thereby obtaining channel information, and ⁇ represents the feature vector information of the channel.
- ⁇ can be divided into multiple codebooks corresponding to Rank (rank), and each Rank corresponds to a plurality of codewords to quantize the precoding matrix formed by the channel feature vectors under the Rank. Since the number of Rank and non-zero feature vectors of the channel are equal, in general, the code words when Rank is ⁇ will have a queue. Therefore, the codebook ⁇ can be divided into multiple subcodebooks according to the difference of Rank, as shown in the table. Number of layers t (Rank)
- % Number of columns is 1 Code number 2 Number of codes Number of columns N Number of code words Mega arrays Word vector collections Beauty
- the codewords to be stored in Rarik>l are in the form of a matrix, wherein the LTE field, the codebook in the meaning of i is the feedback method of the codebook quantization, and the LTE downlink 4 transmit antenna codebook is as shown in the table. As shown in Fig. 2, in fact, the precoding codebook and the channel information quantization codebook in LTE have the same meaning. In the following, for the sake of uniformity, the vector can also be regarded as a matrix of dimension 1.
- the minimum feedback unit of channel information is subband (Bandband) channel information, and one subband is composed of thousands of RBs (Resource Blocks), and each RB is composed of multiple REs (Resource Element).
- the resource unit is composed of RE, which is the smallest unit of time-frequency resources in LTE, and the LTE resource representation method is used in LTE-A.
- Several Subbands can be called Multi-Subband*. Multiple Subbands can be called Wideband.
- the channel status information feedback includes: Channel quality indication (CQT for short) information, PMI, and Rank Indicator (abbreviated as RI).
- CQT Channel quality indication
- PMI PMI
- RI Rank Indicator
- the CSI content that we are most concerned about here is PMT information, but both RT and CQT are also part of the channel state information feedback.
- CQT is an indicator to measure the quality of downlink channels.
- CQT is represented by integer values from 0 to 15, representing different CQI levels, and different CQIs correspond to their respective modulation modes and code rate (MCS).
- MCS modulation modes and code rate
- the RT is used to describe the number of spatially independent channels, corresponding to the rank (Rank) of the channel response matrix.
- the UE needs to feed back RT information, and other modes do not need to feed back RT information.
- the rank of the channel matrix corresponds to the number of layers.
- PUCCH Physical uplink control channel
- PUSCH physical uplink data sharing channel
- LTE-A Long Term Evolution Advanced
- LTE-A supports larger system bandwidth (up to ⁇ ) and is backward compatible with existing LTE standards.
- LTE-A supports up to 8 antennas on the basis of the existing LTE system, and provides some feedback on codebook feedback.
- the enhanced technology mainly enhances the feedback accuracy of the codebook and utilizes the temporal correlation of the channel information and/or the frequency domain correlation compression overhead. This technology can improve the spectrum utilization of the Evolved International Mobile Telecommumcations-Advance (TMT-Advance) system and alleviate the shortage of spectrum resources.
- TMT-Advance Evolved International Mobile Telecommumcations-Advance
- the main idea of the feedback technology of the enhanced codebook is that the feedback of the PMT is increased relative to the feedback of the LTE, and the feedback of the two PMTs is used to jointly represent the state information of the channel, mainly including two kinds of realities.
- Current mode the feedback of the PMT is increased relative to the feedback of the LTE, and the feedback of the two PMTs is used to jointly represent the state information of the channel, mainly including two kinds of realities.
- dual codebook and dual PMI feedback or define a single codebook equivalent to dual codebook and dual PMT feedback. Defining dual codebook and dual PMT feedback can be further described as:
- the precoding/feedback structure of a subband consists of two matrices.
- the codebook is made up of base stations and
- the UE knows in advance at the same time.
- the feedback codewords can vary at different times and on different subbands.
- a matrix represents the properties of a wideband or long-term channel. Another matrix represents the properties of the determined frequency band or short-term channel.
- the matrix codebook used is represented in the form of a finite number of matrix sets, and each matrix is known to the UE and the base station.
- One of the matrices can be a fixed matrix without feedback. This is equivalent to degradation to single codebook feedback (possibly in the case of high rank and low rank uncorrelated channels).
- channel information proposes a structure based on double codebook, which can be further described as:
- the UE feeds back two PMT information to the base station (in some cases, it is not necessary to pass feedback, or a PMT may be predefined as a fixed value, no feedback is performed), respectively PMI1 and PMT2, where PMI1 corresponds to codeword W1 in one codebook CI, and PMT2 corresponds to codeword W2 in another codebook C2.
- the base station has the same information of C1 and C2.
- the above codebook design criteria is a specific codebook form in LTE-A.
- the design of the codebook feedback has two important parts. The first important part is the specific structure, cost and specific codeword of W. It is directly related to the performance of the codebook feedback (although the specific feedback form is feedback WI and W2). , does not directly feedback W), this part of the consideration for the single codebook and the double codebook form are similar.
- the second important part is how to split W into 2 codebooks to better adapt to the channel time domain. / Frequency domain change characteristics, effective cost savings. This is a consideration of the cost savings of dual codebooks. Single codebooks do not have this consideration.
- i 3 ⁇ 4 is a common code word, which can usually be written as a function form ⁇ ( ;1 , : need to determine ⁇ ⁇ .
- Table 4 This method is actually equivalent to the dual codebook dual PMI. The only difference is that the two codebooks C1 and C2 are no longer defined in this method. Instead, the codebook corresponding to the W and the functional relationship is defined. , that is, the virtual codebook is replaced by CI C2 by the actual definition.
- the sum of the overhead required to feed back the information of PMT 1 and PMT 2 (which can also be understood as the overhead of the codebook corresponding to W) is increased relative to the overhead of the single codebook in LTE.
- the codebook is applied to the channel information feedback on the PUCCH, when the W1 and W2 are simultaneously transmitted in a single anger, the CST feedback overhead of the PUCCH exceeds the overhead limit of the II bits, so that the transmission performance of the PUCCH is severe. Falling has a very serious impact on the system.
- PMI1 and PMI2 are transmitted separately, for example, PMTI and RT are transmitted simultaneously, although
- the present invention provides a channel state information feedback method and a terminal, which can ensure that the CST feedback overhead on the PUCCH does not exceed the limit, avoids a serious degradation of the transmission performance, and can ensure the accuracy of the PMI feedback under a limited overhead, so that the CSI on the PUCCH Feedback is still more efficient in supporting precoding techniques and is compatible with feedback on PUSCH.
- the present invention provides a channel state information feedback method, in which a terminal uses a codebook to quantize channel state information in LTE-A, and feeds back the channel state information through a physical uplink control channel, including:
- the number of layers used or the codebook of the rank r is ee i (r)
- the codeword included in the total codebook defined in LTE-A is the number of layers or rank r
- W is a single codebook or a double codebook equivalent single codebook
- the C ⁇ t (r) is a single codebook or a double codebook equivalent A single codebook
- the double codebook equivalent single codebook means that the actually used codebook is an actually defined one-single codebook, but two predetermined precoding matrix indicators are needed for determining the r to determine the code.
- the codebook of the word When the channel state information is fed back on the control channel, the number of layers used or the codebook of the rank r is ee i (r), and the codeword included in the total codebook
- the above method may also have the following features:
- the above method may also have the following characteristics:
- the method further includes: the base station notifying the terminal by the higher layer signaling that the codewords in the (: ⁇ fr) are composed of which codewords in C(r).
- the codeword is a satisfying model extracted from C (r ), and the corresponding (X k is /, -/ ⁇ all or part of the codeword; or, half of the codeword constituting C pya3 ⁇ 4 (r) is from (
- the partial codeword extracted from r) and the corresponding a k is ⁇ 1,-1 ⁇ , and the other half of the codeword is extracted from C yusci! (r) , and the corresponding ⁇ 3 ⁇ 4 is a partial codeword of ⁇ / ⁇ , - ⁇ / ⁇ "; or, constitutes a CurcCi7
- the 1/4 code word is a partial code from C and corresponds to 1/2 ⁇ 4.
- ⁇ /4 code word is C, i (the part code word extracted from ⁇ that satisfies the model * should be -1, 1/4 code word is from (:', 3 ⁇ 4 ⁇ (the extracted model JL) *f should be j
- the partial codeword, 1/4 codeword is the satisfaction model extracted from A: ⁇ C// (r), and Jji's partial codeword is £-j.
- the above method may also have the following features:
- the above method can also have the following characteristics: ( ⁇ ⁇ / (in the case of the same value, at most 2 code words t satisfying the model are available at the same time, the above method can also have the following characteristics:
- N 16 or 32;
- the (r) codeword is all or part of the codeword selected from the UU: ⁇ 2 ⁇
- the codeword constituting ( ⁇ . ⁇ (r) is all or part of the codeword selected from 0U; or, the codeword constituting c ⁇ ra (r) is all or part of the codeword selected from ⁇ ;
- the codeword constituting C et (r) is all or part of the codeword selected from UU ' 4i - 2 ;
- the code word of the constituent C PUC i / (r) is all or part of the code word selected from UU V 4 t -3;
- the codeword constituting ( ⁇ (r) is all or part of the codeword selected from the UU.
- the above method may also have the following features:
- the codeword constituting C PUCCU (r ) is all or part of the codeword selected in the codeword of the case of the PVSCH; or, constitutes C uccn
- the codeword of (r) is the satisfaction of the extraction in ⁇ (r)
- the half codeword constituting C rarai (r) is the satisfaction model extracted in the C Ci (r)
- the codeword of the part can also have the following characteristics:
- the codeword constituting the C PUCCU (r) is a codeword selected in the C (r) that satisfies the model u' u " and is all or part of ⁇ 1, - 1 ⁇ ;
- the codeword constituting the C PUCCU (r) is a codeword of all or part of the selected model satisfying the model and being ⁇ 1,
- the codeword constituting u (r) is the satisfaction model selected in the (r) And all or part of the codeword of ⁇ -1, -/ ⁇ ;
- the codeword constituting the CPUCr (r) is a codeword that satisfies the model selected in the C(r), and ⁇ is all or part of the codeword;
- the codeword constituting the C PUCCH (r) is a codeword that satisfies the model selected in the C ftJSCH and is all or part of one.
- the above method can also have the following characteristics: r ,
- a _ corresponds to two values ⁇ 1, -1 ⁇ , respectively:
- the codeword constituting C PUCCH (r) is the satisfaction model selected in the C PljSCU (r)
- the codeword constituting C PUCCH (r ) is the satisfaction model selected in the C ! JSCH (r)
- the above method may further have the following features
- the codeword constituting (r) is the C / Satisfied in s ( )
- the codeword constituting C ⁇ ! (r) is the selected one of the C PUSCH r)
- Ku is -oc k u n a k ti
- the half codeword constituting C puecu ⁇ r) is a partial codeword selected in the C (r) that satisfies the model, and the other half of the codeword corresponds to ku ⁇ -a k u ⁇ u. "A G3 ⁇ 4"
- the above method may also have the following features:
- the codeword constituting C puca! (r) is the satisfaction model selected in the C (; ⁇ )
- codeword constituting C PUCCH (r) is the satisfaction model selected in C (r)
- the half codeword constituting (r) is the satisfaction model selected in C (r) u j u ti
- the above method may also have the following features: ff ⁇ l ⁇ PUCVil (r) and C PtJSCH ) complete the code word for arbitrary column exchange, multiply by The codebook formed by the transformation of the coefficients or all the codewords in common for row exchange is equivalent to the codebook before the conversion.
- the present invention further provides a channel state information feedback method.
- LTE-A a terminal uses a dual codebook to quantize channel state information, and feeds back the channel state information through a physical uplink control channel.
- the number of layers used or the codeword in the first subcodebook (:] (r) of rank r is the number of layers in the total codebook defined in LTE-A or a first portion of a codeword rank codebook d 3 ⁇ 4 (r) r in, and / or, using the number of layers or the second sub-codebook rank of r (3 ⁇ 4 ⁇ ⁇ codeword (r) is the LTE -
- C PUCCU (r) is the codebook (:] ⁇ 3 ⁇ 4 (r) and (r), etc.
- the (r) equivalent weight codebook (: ⁇ (r) all codewords and C j (r) all A set of all new codewords that a codeword can collectively indicate by a function Fi;
- C ⁇ ra (r) is a codebook ⁇ W and
- (r) equivalent virtual single codebook said ( ⁇ (r) Equivalent to a set of all codewords in codebook C and all new codewords that all codewords can collectively indicate via a function F1.
- the above method can also have the following characteristics:
- the above method may also have the following features:
- the method further includes: the base station notifying the terminal of the following information through high layer signaling:
- the code words in (:, ( (r) are composed of which code words in C i plausible (r);
- codewords in (3 ⁇ 4 ⁇ 7 (r) are formed by which codewords in (r);
- codewords in ⁇ UCCH (r) consist of which codewords in C ⁇ ffi (;-);
- the codeword consists of which codewords in (r).
- the codeword constituting ⁇ (r) is the model that satisfies the model extracted from (r) and the corresponding ⁇ 3 ⁇ 4 is ⁇ ./', -./ ⁇ Or part of the code word;
- the half codeword constituting ( ⁇ (r) is the satisfaction model extracted from (r)
- the corresponding partial codeword of " ⁇ 1, -1 ⁇ , the other half of the codeword is the satisfaction mode extracted from (r)
- the 1/4 code word constituting (r) is a satisfaction model extracted from C / s (r)
- Ku i should be a partial codeword of 1
- 1/4 codeword is a partial codeword extracted from (the extracted model, and corresponding to 1)
- 1/4 codeword is extracted from C / s ( ) Satisfaction
- the model, and the corresponding ⁇ is the partial codeword of J, : 1/4 codeword is the partial codeword extracted from it, and the corresponding cx k is -j.
- the above method can also have the following characteristics:
- the above method may also have the following characteristics:
- the codeword constituting c ⁇ (r) is all or part of the codeword selected from j; or, the codeword constituting o ⁇ t (r) is all or part of the codeword selected from ⁇ ; 4 4
- the codeword formed is all or part of the codeword selected from the UU;
- the codeword constituting Cn r) is all or part of the codeword selected from the UU; or, the codeword constituting Cn(r) is all or part of the codeword selected from ⁇ .
- the above method may also have the following features:
- the codeword of the foot model optionally, the above method can also have the following characteristics:
- the 4D vector, ⁇ / ⁇ has eight kinds: ⁇ , the case of B, w, ⁇ «building, A is positive t, B is non-negative integer, for each combination of ( ⁇ , ) There are two kinds of values ⁇ 1,./ ⁇ , then:
- the codeword is the satisfaction of the extraction in the C ra ⁇
- the codeword constituting C n:caj (r) is the satisfying model n s u i it selected in the C pusai ( )
- the codeword constituting G r) is the codeword satisfying the model selected, and ⁇ is all or part of the codeword of ⁇ 1, ./' ⁇ ;
- the codeword constituting C P[;c , (r) is a codeword satisfying the model selected in the C ( ), and ⁇ is a codeword of all or part of ⁇ 1,-./' ⁇ ;
- the codeword constituting the C PUCCU ⁇ r) is the satisfaction model selected in the C PUSCH ( )
- the codeword constituting the C PUCCU W is the satisfaction model selected in the C PUSCH ( )
- ⁇ is a codeword of all or part of 1,
- the codeword constituting C P CCU (r) is the satisfaction model selected in the C PL; SC (r)
- the codeword constituting C L; / ( ) is the selected satisfaction model
- the above method may also have the following characteristics:
- the C TOSCii ( ) includes an even number of codewords, and half of the even codewords satisfy the model u s u ⁇ uu"u" n ⁇
- oc k corresponds to a subset of ⁇ 1, -1, ./, ./ ⁇ or ⁇ 1, -1, ./, -/ ⁇ , then
- the codeword constituting C P (r) is all or part of the codewords selected in the C PtJSCH ⁇ that satisfy the model;
- the half codeword constituting the C PUCCU (r) is a partial codeword that satisfies the model selected in the C (r), and the other half of the codeword is a satisfied codeword corresponding thereto.
- the above method may also have the following features:
- the codeword constituting C PUCCii (, ') is the satisfaction model selected in the C ( )
- the codeword constituting C PUCCU (r) is the satisfaction model selected in C ⁇ u : u i u n u u
- the codebook formed by performing arbitrary column exchange, multiplication by constant coefficients, or conversion of all codewords in common, is equivalent to the codebook before conversion.
- the invention also provides a terminal, comprising:
- a quantization unit which is set to: use the codebook amount fli signal state information in Advanced Long Term Evolution (LTE-A);
- the feedback unit is configured to: feed back the channel state information by using a physical uplink control channel; where the quantization module is set to:
- the codeword (r) used in the number of layers or rank r contains a codeword which is a subset of the total codebook number defined in LT.E-A or a codebook C3 ⁇ 4t3 ⁇ 4 ⁇ of rank r ;
- the C, OTi (r) is a single codebook or a codebook equivalent sheep codebook; the (r) is a single codebook or a single codebook equivalent to a silent codebook;
- the double codebook equivalent single codebook refers to a codebook actually used, which is actually a single codebook, but requires 2 precoding matrix indicators for the determined r to determine the codebook of the codeword. .
- r 1. 2 or, the (: (R & lt) duplicate code word, in the C t ra (r) no repetition code word
- the terminal further comprising:
- a receiving module configured to: receive the layer-layer signaling sent by the base station, and obtain, from the high-layer signaling, which codewords in the C i ra (r) are composed of C (r).
- the C (r)+ and C ( r) codewords are exchanged by any column, multiplied by a constant coefficient, or all codewords are exchanged together to form a codebook and a codebook before the conversion.
- the present invention also provides another terminal, including:
- the feedback element is configured to: feed back the channel state information by using a physical uplink control signal; wherein, the quantizing sheep element is set to: a used number of layers or a first sub-codebook of rank r
- the codeword in is the partial codeword in the total codebook defined in LTE-A or the first codebook [r) of rank r, and/or the number of layers used or the second rank r
- the codeword in the subcodebook (r) is a partial codeword in the total codebook defined in LTE A or a second codebook C3 ⁇ 4 ⁇ (r) of rank r;
- C rLmi ( ⁇ is a codebook (r) and C UCCH (r) equivalent single codebook, the (r) is equivalent to the codebook C fatigue, ⁇ r) all codewords and (r) all codewords a set of all new codewords that can be collectively indicated by a function FI;
- CW is a virtual codebook equivalent to Maben ⁇ (r) and (r), where ( ⁇ (r) is equivalent to all codewords in codebook C3 ⁇ 4ra and (: ⁇ all codewords pass a function F A set of all new codewords that can be indicated by the commander.
- ⁇ 1 or 2
- the terminal further includes:
- the receiving unit is configured to: receive the high-level signaling of the transmitting end of the base station, and obtain the following information from the high-level signaling:
- the codewords in (r) consist of which codewords of C(r);
- the codewords in the C ⁇ (r) are composed of which codewords in C3 ⁇ 4 ⁇ , (r);
- the code words in C UCCH (r) are composed of which code words in d (f); or, the code words in the C f (r) are composed of which code words in the dish, the code words in Which codewords are in C> USCH (r).
- the ( ⁇ and ⁇ : ⁇ ) codewords are performed by performing arbitrary column exchange, multiplying by constant coefficients or all codewords to perform row-exchange conversion, and the codebook formed before conversion and the code before transformation This is equivalent.
- the CST feedback can still support the precoding technique more effectively and is compatible with the feedback on the PUSCH.
- the first problem of the embodiments of the present invention is the problem caused by the increase in feedback overhead of PMT1 and ⁇ when LTE-A uses the feedback with enhanced accuracy.
- the idea is suitable for the case of single codebook feedback, and the case of the double codebook equivalent single codebook feedback is also suitable for the case of the dual codebook. If it is a double codebook feedback, it can also be equivalently interpreted as the feedback of the double codebook equivalent single codebook, which belongs to the scope of the present invention.
- the second problem to be paid by the embodiments of the present invention is: ⁇
- the problem that the codebook corresponding to the RI is co-transmitted with excessive overhead or the overhead of PMT2 and CQI transmission is too large.
- the codebook of interest is mainly for the codebook corresponding to the codebook and/or P of PMT1.
- the main idea of the embodiment of the present invention is that in the mode in which PM1. and PM2 are fed back in the same-f frame/different sub-ti, the codeword in the codebook Cca used for feedback channel.state information on the PUCCH is LTE-A.
- the total codebook defined in (the selected part of the codeword is constructed ( ⁇ ; is the child)
- the C ; G£ and ⁇ ai in the application of the dual codebook refer to the codebook corresponding to W.
- the feature description of the codebook corresponding to W1 and W2 can be considered as an equivalent method included in the present invention according to what is described in the background art.
- the codebook C OT corresponding to W used by the PUCCH is a subset of the codebook corresponding to W1 used by the PUSCH, and/or the codebook corresponding to W2 used by the codebook C tM PUSCH corresponding to the W2 used by the PUCCH (: A subset of ⁇ .
- This description is included by the description of the subset of PUSCH and is an equivalent method of the present invention.
- the embodiment of the present invention provides a channel state information feedback method.
- the terminal uses the codebook to quantize the channel state information, and feeds back the channel state information through the physical uplink control channel, and feeds back the feedback on the physical uplink control channel.
- the codeword C i ea (r) used in the layer number or the rank r is a codeword which is the total codebook layer defined in LTE-A or the codebook C FUSC with rank r . a subset of codewords contained in I (r).
- the dual codebook equivalent single codebook means that the actually used codebook is a single codebook actually defined, but two precoding matrix indicators are needed for the determined r to determine the codebook of the codeword.
- the embodiment of the invention further provides a terminal, including:
- a quantization unit configured to: quantize channel state information using a codebook in Advanced Long Term Evolution (LTE-A);
- a feedback unit configured to: feed back the channel state information by using a physical uplink control channel; where the quantization module is configured to:
- Layers or codeword codebook of rank r (r) is included in the total code using LTE-A as defined in the present or in the number of layers of rank r codebook (: ⁇ ⁇ 3 ⁇ 4 (r) contained in the code a subset of words;
- the (r) is a single codebook or a codebook equivalent single codebook;
- the (: si (r) is a single codebook or a codebook equivalent single codebook;
- the dual codebook equivalent single codebook means that the actually used codebook is a single codebook actually defined, but two precoding matrix indicators are needed for the determined r to determine the codebook of the codeword.
- the terminal further includes:
- a receiving module configured to: receive the layer layer signaling sent by the base station, and obtain, from the high layer signaling, the codewords in the (: ⁇ ⁇ ⁇ (r) component of (r).
- the embodiment of the present invention further provides another channel state information feedback method.
- the terminal uses the dual codebook to quantize the channel state information, and feeds back the channel state information through the physical uplink control channel, where:
- the number of layers used or the codeword in the first subcodebook (r) of rank r is the number of layers in the total codebook defined in LTE A or a partial codeword in the first codebook (r) of rank r, and/or, a layer number used or a second subcodebook of rank r, C ra/ (a codeword in er- » is LTE-A
- C PLmi ( ⁇ is a codebook (r) and C ⁇ CT (r) equivalent codebook, the ⁇ ⁇ ( ⁇ is equal to all codewords in the codebook (r) and C; UCCH (r)
- a codeword is formed by a function F1. A set of all new codewords that can be collectively indicated;
- the C ⁇ r is equivalent to all codewords in the codebook d3 ⁇ 4ra and (: ⁇ all codewords pass a function F ⁇ A set of all new code words that can be collectively indicated.
- the present invention also provides another terminal, which includes:
- a feedback unit configured to: feed back the channel state information by using a physical uplink control channel, where the quantized sheep element is set to: a used number of layers or a first sub-codebook of rank I"
- the codeword in W is a partial codeword in the total codebook defined in LTE-A or a partial codeword in the first codebook ⁇ r) of rank r, and/or the number of layers used or rank r
- the codeword in the two subcodebook C ⁇ tX (r) is the number of layers in the total codebook defined in LTE A. or the second codebook Cra (r; i;
- C PtjaM (r) is the codebook (r) and (r) equivalent of the codebook, the ⁇ ⁇ , ( ⁇ is equal to all codewords in the codebook C [J ⁇ 7 (r) and (r) a set of all new codewords that all codewords can collectively indicate via a function FI;
- C pusai (r) is a codebook (: (r) and C usai (r) equivalent virtual single codebook, said ((r) is equivalent to all codewords in the codebook and (3 ⁇ 4 ⁇ all codewords pass A set of all new codewords that a function F1 can collectively indicate.
- the terminal further includes:
- a receiving unit configured to: receive high-level signaling of the transmitting end of the base station, and obtain the following information from the high-level signaling:
- the codeword in the (r) consists of which codewords in C(r);
- code words in (r) are composed of which code words in d 3 ⁇ 4 (r);
- codewords in C(r) consist of which codewords in (r);
- the codeword in (r) consists of which codewords in d 3 ⁇ 4 (r),
- the codeword consists of which codewords in (r).
- the system supports the custom mode of c t;e , and the base station informs the terminal through upper layer signaling that c p cai is composed of which code words in c pusc .
- c P i is composed of which code words in the C PUSCH
- a bitmap (bit map) manner can be used. This method is very flexible and can be customized by the base station according to the current channel environment.
- the predefined approach has different methods for each Rank and for various possible different codebooks.
- the codewords in C PUSCH are mainly designed for dual-polarized channels with more models and features.
- the present invention provides a criterion for selecting the most efficient codeword combination construct (: ⁇ ) based on some CPUSCH codebooks having descriptive features.
- the dual codebook is used to feed back the channel information W jointly represented by the two PMTs or the single codebook equivalent to the dual codebook, and the channel information quantized value W matrix jointly represented by the two PMIs has 2"3 ⁇ 4 kinds of values.
- the channel information quantized value W matrix jointly represented by the two PMIs has 2"3 ⁇ 4 kinds of values.
- Generally single code In the case of the various possible codeword matrices of the present representation, there is no repeated codeword matrix, but in the double codebook or the double codebook equivalent single codebook feedback, due to different combinations of ⁇ and PMT2 indications There are duplicate codewords.
- the repetitive horse neck is used to solve some problems caused by PMTI wideband feedback and PMT2 subband feedback, and improve system performance.
- the information is mainly broadband information, such as broadband PMT1 and Broadband PMI2, therefore, the double codebook equivalent single codebook used by PUCCH, or the codebook in the double codebook and function F virtual representation does not need to have duplicate codewords. If there are duplicate codewords, the number of valid codewords will be reduced and performance will not be guaranteed.
- the actual feedback form is dual codebook dual PMT feedback or dual codebook equivalent single codebook dual PMI feedback, and there is a duplicate codeword, there is no duplicate codeword in the single codebook or double codebook defined in the codeword. That is, C t; cci is a single codebook or a double codebook composed of non-repeated codewords selected therefrom.
- C ⁇ refers to a single codebook equivalent to a double codebook, or a single codebook equivalent to a virtual double codebook.
- the channel information W jointly represented by the two PMTs has various structural features, indicating the total codebook, which is actual.
- a single codebook equivalent to a double codebook defined or virtually defined.
- the codebook used on the PUCCH is a two-codebook equivalent single codebook that is actually defined or virtually defined.
- (; ⁇ , the codeword in the codebook constructs the codeword in the Cpucai codebook some codeword combinations with relatively effective structures are selected from these structures:
- the codebook or the double codebook equivalent single codebook has a duplicate codeword or there is no duplicate codeword, for any value of 1, at least four corresponding satisfaction models in (; ⁇ )
- the codeword is: So all the codewords are full of 'the above model, double
- the two codebooks can respectively correspond to different overheads.
- An extreme case is the case of 5) mentioned in the prior art, in which case W1 or W2 may even be a fixed matrix, and the codebook is degenerated into a single codebook feedback combined with a fixed matrix to represent channel information.
- the present invention provides the following method of constructing C pucai :
- the codeword of the recw Raiikl codebook is all or part of the codeword whose model k is ⁇ 1, -1 ⁇ extracted from the Rank! codebook, where it may be a single codebook or Is the codebook, such as. ⁇ C ccM is a double codebook, the real body, W is split into W1 and W2 representations, and corresponds to two codebooks respectively, which can be determined according to the method of ⁇ .
- the codeword of the codebook is all or part of the codeword whose full k is ⁇ ./,-./ ⁇ extracted from the (;., Rank! codebook).
- the C cai method is constructed by C PUSCH and the real body division of W1, W2. Can be easily described as how the codewords in C' and / or C ca ' from the sum or codebook
- the part of the codeword that constitutes the 'PUCCII Rank! codebook is the part of the codeword extracted from the C P " 3 ⁇ 4W Rank" codebook , and the corresponding codeword is ⁇ ,- ⁇ , and the remaining codewords are
- the partial codewords that are extracted from the US PUSCN Rank! codebook and whose corresponding a is -/ are:
- This method cannot be described as how the codewords in ( ⁇ and / or ( ⁇ ⁇ / are extracted from d w and/or the codebook, mainly suitable for a specific transmission mode on the sub-PUCCH, indicating the codebook information of w in one The status of the transmission in the Report Type (the information of the rank is not included here) ⁇ .
- JL*f should be a partial codeword of 1 and 1/4 of the codeword is from ⁇ PUSCH
- ⁇ 3" should be ⁇ is a partial codeword of j.
- the optional C UCCII Rankl codebook only exists for a maximum of ⁇ two corresponding codewords satisfy the model of the present method can not be described as t and / or c CCLI how the codeword from and / or c codebook Extract. It is mainly suitable for a specific transmission mode on the PUCCH, indicating the codebook information of W The case of transmission in a Report Type (the information of the rank is not included here)
- the codewords constituting the (;. ⁇ 7 Rank! codebook are all selected from L
- the codewords constituting the PU ⁇ PUCCli Rankl codebook are all or part of the codewords selected from the JU; or, the codewords constituting the Rank1 codebook are all selected from UU., ', 4; Or part of the code word;
- the codeword constituting the Rank1 codebook is all or part of the codeword selected from the UU;
- the codeword of the PU CH Rankl codebook is all or part of the codeword selected from the UU;
- the codewords constituting the C Rank1 codebook are all or part of the codewords selected from the UU.
- the C PUCCH Rankl codebook there is only no more than 2 codewords satisfying the model corresponding to a certain one.
- the single codebook feeds back the channel information W jointly represented by the two PMTs, and has a plurality of structural features, and represents a total codebook, which is a two-codebook equivalent single codebook that is actually defined or virtually defined.
- the codebook used on the PUCCH is a two-codebook equivalent single codebook that is actually defined or virtually defined.
- some codeword combinations with more efficient structures are selected from these structures:
- the codeword constituting the C i;c , Rank 2 codebook is all or part of the codeword selected in the codeword of the case of the type A ⁇ u n in the c t3 ⁇ 4 i Rank2 codebook.
- the partial codeword constituting the Rank2 codebook is extracted from the Rank2 codebook, and satisfies the model and corresponds to a codeword of 1, the remaining codewords are from the Rank2 code.
- codeword The codeword extracted in this paper satisfies the model and corresponds to "codeword"; a special case is that half of the codeword of the C pi Rank2 codebook is drawn from (:' R.ank2 codebook Take the codeword that satisfies the model and corresponds to ⁇ , and the other half of the codeword is from C ; a k u i -c k u i
- the channel information W jointly represented by the two PMTs has various structural features, and C represents the total codebook, which is A single codebook equivalent to a two-codebook that is actually defined or virtually defined.
- C represents the total codebook, which is A single codebook equivalent to a two-codebook that is actually defined or virtually defined.
- the ⁇ and ⁇ are different 4D vectors.
- u u corresponding to the four values ⁇ 1, -1,./,-./ ⁇ , respectively.
- the present invention provides the following method of constructing C t; ei :
- the codeword constituting the CPUCCU Rank3 codebook is the C selected in the H Rank3 codebook.
- the satisfaction is u : u j u ti
- the model and corresponds to all or part of the codeword t of ⁇ 1,- 1 ⁇
- the codeword constituting the C puccu Rank3 codebook is a codeword selected in the C-set H Rank3 codebook that satisfies the above model, and c k corresponds to all or part of ⁇ 1, / ⁇ .
- the codeword constituting the C pucai Rank3 codebook is the one selected in the C PU Rank3 codebook.
- the model and corresponds to all or part of the codeword of 1.
- the codeword constituting the C P , m , and Rank 3 codebooks is d f , the codeword selected in the Rank 3 codebook that satisfies the above model, and “all or part of the codeword of 1
- Neutralize ⁇ is a different 4-dimensional vector. For each ⁇ and sum combination ( Mi , u" corresponds to 2 values ⁇ 1, -1 ⁇ , respectively.
- the codeword of the Rank3 codebook is the codeword selected in the Rank3 codebook that satisfies the above model and is all or part of i.
- the codeword of the nk3 codebook is selected in the Rank 3 codebook to satisfy the above mode.
- Medium 7 and 7 ⁇ are different 4-dimensional vectors. For each Ui and u u and the combination ( u t , u u ), respectively correspond to two values ⁇ 1, ./ ⁇ .
- the code word of C'-P ThreadU,,CCH, Rank3 codebook is C Pi , . , ra Rank3 codebook selected to satisfy the above mode
- ⁇ is the codeword of all or part of ⁇
- the codeword of the Rank3 codebook is the codeword selected in the Rank3 codebook that satisfies the above volume type and corresponds to all or part of j.
- the code word of the mechanical C PUCCH ank3 codebook is selected in the Rank3 codebook to satisfy the above mode.
- the codeword of the nk3 codebook is (; the selected one of the ank3 codebooks satisfies the above mode.
- k3 codebook codeword to meet the above and J correspond to all or OC k codewords Rank3 selected codebook portion
- u and u u are different 4-dimensional vectors. For each U ⁇ and u" and combination, it corresponds to two values ⁇ -1, / ⁇ , respectively.
- the codeword constituting the Rank3 codebook is selected in the Rank 3 codebook to satisfy the above mode.
- the codeword constituting the Rank3 codebook is selected in the Rank 3 codebook to satisfy the above
- o k corresponds to all or part of the codeword of .j
- the C Rank3 codebook includes an even number of codewords. Half of the even number of codewords satisfy the model. The other half corresponds to it, and the sum is not a k u i - k u ik u -o k u k u l
- the same 4-dimensional vector, % corresponds to ⁇ ,- ⁇ ,, /,- ⁇ or a subset of ⁇ ,- ⁇ ,, /,-./ ⁇ (such as ⁇ i,-i ⁇ ). That is to say, for the combination of ⁇ and M consult, there are at least two code words and
- the codeword constituting the CPUCCU Rank3 codebook is all or part of the codewords selected in the C Rank3 codebook that satisfy the model;
- composition code of the '' Rank3 codebook' is all or part of the codeword selected in the ⁇ PUSCH Rank3 codebook;
- the half codeword of the 'PUCCll Rank3 codebook is the partial codeword of the G FUSCII Rank3 codebook that satisfies the model, and the other half corresponds to the ku i -o k u. a k u si code. word
- the channel information W jointly represented by the two PMTs has various structural features, indicating the total codebook, which is actual.
- a single codebook equivalent to a double codebook defined or virtually defined. ⁇ -FUCCIl indicates
- the codebook used on the PUCCH is a double codebook equivalent single codebook defined by actual definition or virtual twist.
- some codeword combinations having a more efficient structure are selected from these structures:
- the codewords that are all Rank4 codebooks are the satisfaction model selected in the C w / Rank4 codebook u : u i u n U ⁇
- the codeword constituting the Fuc i R.ank4 codebook is C L; ⁇ R.ank4 codebook selected to satisfy the model, and corresponds to all or part of the codeword of j;
- the half codeword constituting the Rank4 codebook is a codeword selected in the dge Rank4 codebook that satisfies the model 11 ' u> 11,1 and corresponds to 1; the other half of the codeword
- Method Constructs C PUCCH If the codewords in ⁇ satisfy the model described in the above methods after performing equivalent transformation (column exchange or multiplication by constant coefficients or all codewords are used for row exchange), the similarities provided in methods 2 to 5 may be used. Method Constructs C PUCCH . The codewords in the code also have corresponding equivalent transformation forms.
- Embodiment 1 High-level signaling bitmap definition
- each bit corresponds to one of the codewords, and the base station sets the bit to 0 to indicate that the codeword is not selected, and sets the value of ⁇ bi ⁇ to indicate that the codeword is selected as the codeword.
- the base station through the lower layer signaling Gao Mbit send this to the UE, determines the C PUCCH codeword.
- the base station sends the Mbit to the UE through the high layer signaling, where: M1 bits in the i M bit correspond to M1 code words in the codebook, and each bit in the M1 bit is read.
- the base station indicates that the codeword is not selected by setting the read bit to 0, and the bit is set to indicate that the codeword is selected as the codeword of the ⁇ UCCH ;
- the M2 bits in the i M bits correspond to the M1 code words in the codebook, and each bit in the M2 bits is read.
- the base station indicates that the code word is not selected by setting the read bit to 0, and setting the bit to ⁇ indicates that the read is selected.
- the codeword is used as the codeword of ( ⁇ ⁇ / . It can also be a structure for the dual codebook.
- the base station sends the M i to the UE through the high layer signaling, and the M codewords in the corresponding codebook d 3 ⁇ 4 , for each Bit, the base station indicates that the codeword corresponding to the ⁇ bit is not selected by setting the read bit to 0, and the codeword indicating that the bit corresponding to the read bit is selected as the codeword.
- the codewords in C' are all used (: why, the code word.
- the base station sends the Mbit to the UE through the high layer signaling, and the M codewords in the corresponding codebook.
- the base station sets the bit to 0 to indicate that the bit is not selected.
- the code word, the bit is I indicates that the code word corresponding to the bit is selected as the code word of C ei , and all the code words in u scl! all use the code word of the proud C.
- Embodiment 2 The decimated codeword in the Rank1 codebook constitutes c PUCCH
- a protocol code used by PUSCH is
- bj is a vector, such as a typical DFT vector
- a parameter that is related to the dimension of a vector usually refers to the number of transmit antennas.
- ⁇ is an integer power of 2
- C' (the codebook corresponding to W2) consists of 2 code words, for example, when Rank1 is included
- Ye ⁇ 1 : ⁇ 2 , ⁇ ,- m 2 is generally equal to 4 N 6 , g is a vector of ⁇ L ⁇ I, the first element is 1 other elements are 0, real
- the vector is a column-selected vector.
- Wi is multiplied by the codeword in d 3 ⁇ 4 , it can be understood as selecting the codeword in the codebook corresponding to the column structure W in X w .
- the equivalent c i; ⁇ (the codebook corresponding to W) contains the codeword obtained by any codeword in the left of any codeword, that is, there are X ⁇ codewords. In this case, the PUSCH is extracted.
- the codebook (: ⁇ ; ⁇ medium codeword, the constructed PUCCH specific codebook can be:
- the C USCH sampling structure C ⁇ uccu can be any method.
- This embodiment can be generalized to the case of Raii.k2, and Cj ⁇ extracts an even-numbered codeword.
- the extracted codeword construction in C SCJ of Raii.k2 can be any method.
- the variant codebook obtained by performing column exchange or/or multiplication by the constant coefficient or all codewords may also use the extraction method described in this embodiment, or may perform column exchange or multiplication by
- the anamorphic method described in this embodiment can also be used for the anamorphic codebook obtained by coordinating the coefficients or all the codewords. t C ⁇ COT in there respective codeword representation equivalent transformation.
- Example 3 Rankl extracted from the codeword in the codebook C PUSCH configuration (; for example: a double codebook used is one kind PUSCH l corresponding codebook) consists of a codeword W]
- A is the number of columns in matrix X, 1) is a vector, such as a typical DFT vector (but not limited to this case; brother), there are a total of N basic vectors be b ⁇ , described as:
- Equivalent (: ⁇ ⁇ 3 ⁇ 4 (W corresponding codebooks) d 3 ⁇ 4 comprise any multiplying codeword any codeword to obtain a code word, that is 3 ⁇ 42 codewords.
- the codebook of the PUSCH (:; ⁇ ⁇ medium codeword is extracted, and the constructed PUCCH specific codebook C 'a/ can be ':
- the extracted codeword construction ⁇ OTi can be any method
- Embodiment 4 is constructed by extracting codewords from (:; Rankl codebook (::
- a double codebook used by PUSCH is
- Mi l ⁇ , which is the number of columns of the matrix X w , l is a vector, such as a typical DFT vector (but not limited to this case), there are a total of N basic vectors b. ⁇ b ⁇ , described as:
- a parameter related to the dimension of the vector generally refers to the number of transmitting antennas.
- C' (the codebook corresponding to W2) is composed of M 2 code words, for example, when Rank1 contains:
- the equivalent c i; ⁇ (W corresponding to the codebook) contains the codeword obtained by any codeword in any of the codewords left by d, that is, there is a codeword.
- the codebook of the PUSCH (: medium codeword, constructed PUCCH codebook (: "' ⁇ FUCCH can be:
- the description of this method is from (: 'How does TOtra describe from the extraction code, not from C ⁇ C ⁇ how to extract the codeword from ⁇ , more true
- the description of the latter may be equivalent to a description of the former according to its relationship, and the description of the former may not be equivalent to the way of the latter.
- the mode in this embodiment the deformed Maben can also use the extraction method described in this embodiment, or, for ( ⁇ 3 ⁇ 4 column exchange or The anamorphic method described in this embodiment can also be used by multiplying the constant coefficient or all the imaginary characters to perform the row exchange.
- C PVCCH C;, v/ the codeword in ⁇ also has the corresponding equivalent. Transform the representation.
- Embodiment 5 J Rank 2 codebook extracting codeword composition
- C uscll (the corresponding codebook of W1.) is composed of codewords.
- N can be 32, 16, and the like;
- the codebook corresponding to C 2 is composed of code words, for example, when R:ank: 2 contains
- the selected loss when W is multiplied by (3 ⁇ 4 ⁇ 3 ⁇ 4 ), can be understood as selecting the column in X® to construct the codeword in the codebook corresponding to W.
- the code word obtained by the code word that is, there are X ⁇ ⁇ ? words. .
- the codebook of the PUSCH (the codeword in ⁇ , the constructed PUCCH specific codebook C ⁇ can be:
- ⁇ 16 o'clock or, or, or,
- Embodiment 6 J.C R.ank3 codebook extracting codeword composition ⁇
- the codebook corresponding to W1 is composed of codewords
- S is a vector such as a typical DFT vector (but not limited to this case)
- N is the integer power of 2.
- C 2 (the codebook corresponding to W2) is composed of codewords.
- Rank3 contains 16 codewords:
- the codeword in the codebook of the PUSCH is extracted, and the specific PUCCH codebook can be:
- Extraction method 1 The code word structure can be extracted from (3 ⁇ 4 ⁇ 3 ⁇ 4 ), and the code word structure (:] can be extracted from (:] ⁇ 3 ⁇ 4 to extract the code word W ... f - 2 with an even index. It is an odd number of code words W " W, (3) W, (5) W, (7) ... all or part of the code word. That is to say, the method described in the previous Rmikl, R.ank2 embodiment also applies to Rank3.
- Extraction method 2 The code word structure can be extracted from any method.
- the code word C can be extracted from FUSCII to extract the following code words:
- C PVCCH The code word structure extracted from d 3 ⁇ 4 can be any method, and C ⁇ CCH can be all forms described in the second method of extraction mode or:
- extracting the codeword construct ⁇ can be any method, extracting the codeword construct C from d; UCCH can be extracted The following code words:
- Example 7 constituting the codeword extracted from the codebook C PUSCH Rank4 in
- N o is the number of columns of the matrix xW , which is a vector, such as a typical DFT vector (but not limited to this case; brother), there are a total of N basic vectors ⁇ b ⁇ , such as ⁇ b , for different DFT vectors are described as:
- a parameter that is related to the dimension of a vector usually refers to the number of transmit antennas.
- C USCII (the codebook corresponding to W2) is composed of m 2 code words.
- RaiiM contains 8 code words:
- the CCH structure of the extracted codeword in JC USCH can be any method.
- the codeword structure c can be extracted from d 3 ⁇ 4 .
- the codeword can be the code word w 'W 2 ) W 4 ) W 6 ) ... W v/ - 2 ) or Index is an odd number of code words W) W- 3) W ... w 2V / - all code words. That is to say, the Rank method described in the previous implementation is reversed.
- the extraction method under Ran.k2 Rank3 is also applicable to Raiik4.
- ⁇ C' extracted codeword structure (: ⁇ can be any method, the extracted codeword structure can be extracted the following codeword:
- the variant codebook obtained by performing column exchange with or/or c 'PUSCJI or multiplying by constant coefficient or all codewords may also use the extraction method described in this embodiment, or, for C, row or column exchange or
- the derivation code obtained by multiplying the constant coefficient or all the code words in line exchange can also use the extraction method disclosed in this embodiment.
- pucai C ⁇ UCCH c rmi also has a corresponding equivalent transformation representation of the codeword.
- Embodiment 8 extracts a codeword from a R3 ⁇ 4ik5-7 codebook of CV f .. v/ to form CF ; UCCH
- a codebook used by PUSCH is
- the PUCCH codebook used for extraction is
- a double codebook equivalent single codebook of Rank 1 is:
- ⁇ is related to the second index.
- This codebook is equivalent to the Rank 1 codebook in Embodiments 2, 3, and 4, except that the C' si Rank! codebook in Embodiments 2, 3, and 4 defines two codebooks and one functional relationship.
- the present embodiment defines a single codebook format equivalent to a dual codebook. But in either case, the two methods are equivalent, and the codebook can be defined in any way, and the index of the feedback is two.
- ⁇ can be regarded as the feedback index corresponding to the codebook C1 in the embodiment 2, 3, 4, which can be regarded as the cable 1 corresponding to the codebook C2 in the embodiment 2, 3, 4
- Embodiments 2, 3, 4 and C' si are equivalent codebooks in this embodiment, the difference is only implemented in the second embodiment, the double codebook is used in the embodiment 2, 3, 4, and the embodiment is a double codebook equivalent.
- the codebook feedback method but the idea of constructing the CPUCCU for the codebook is completely consistent. Therefore, the method described in the previous embodiment can be used for the C PUSCU in this embodiment.
- Embodiments 2, 3, and 4 Since the contents of Embodiments 2, 3, and 4 are many, they will not be described here, and only some of them are extracted. The law is an example.
- the codeword structure can be selected (corresponding to the idea of Embodiment 2, and the repeated codeword is not included after extraction):
- the extracted codeword methods described in the above two parties are essentially the same, but are two different implementation methods. More specifically, it can be expressed as: extracting all or part of the codewords from the following 28 codewords:
- the Raii.k2 codebook can be represented by the following dual codebook equivalent single codebook.
- the difference is that in the embodiment 5 This is achieved by using a dual codebook.
- This embodiment is a two-codebook equivalent single-codebook feedback method, but the idea of extracting the codebook construct C ⁇ et is completely consistent. Therefore, the methods described in the foregoing embodiments can also be used to extract C, UCCH, and/or how to extract c from the C; USCH according to how to extract C; UCCJi from C USCH in Embodiment 5, or simply how to ⁇ Perform codeword extraction and/or codeword extraction.
- the codeword construction C w can be selected to select some or all of the following codewords (corresponding to the idea of Embodiment 5, and the repeated codewords are not included after extraction):
- the Raii.k3 codebook can be represented by the following double codebook equivalent single codebook.
- W ⁇ , m , 3 ⁇ 4, m disturb is a matrix determined by the value of ⁇ ⁇ ,, which is related to the first index 'and the second index to be fed back.
- the R.ank3 codebook in this embodiment 6 It is equivalent, the difference is that the Rank3 codebook defines two codebooks and one functional relationship in Embodiment 6. However, this embodiment defines a single codebook form equivalent to a double codebook. The two methods are equivalent, and the codebook can be defined in any way, and the index of the feedback is 2.
- the ⁇ can be regarded as the feedback index corresponding to the codebook C1 in the embodiment 6, and can be regarded as It is an index corresponding to the codebook C2 in the sixth embodiment.
- the difference between the embodiment 6 and the embodiment is an equivalent codebook.
- the difference is that the dual codebook is used in the embodiment 6 to implement the dual codebook equivalent single-codebook feedback method, but the ear code and the codebook are used.
- the idea of constructing C ⁇ et is completely consistent. Therefore, the method described in the previous embodiment can be used for the present embodiment. The content of the method is not described here, and only the partial extraction method is taken as an example.
- RanM codebook can be represented by the following double codebook equivalent single codebook ⁇ 3 ⁇ 4 I
- W ⁇ : , n is a matrix that needs to be determined by the value of mn. These parameters are related to the first index ⁇ and the second index ⁇ that require feedback.
- the Rank4 codebook in this embodiment is equivalent, the difference is in the embodiment , (, ⁇ Rank4 codebook defines 2 codebooks and a function relationship. And the real implementation of the definition is a code This equivalent single-code form. But in either form, the two methods are equivalent, and the codebook can be defined in any way.
- the index of the feedback is 2. Two. It can be seen as The feedback index of the codebook CI in Embodiment 7 can be regarded as the index of the codebook C2 in the corresponding embodiment.
- the demodulation code obtained by performing column exchange on d 3 ⁇ 4 and/or C ⁇ USCH or multiplying by constant coefficient or all code words to perform row exchange may also use the extraction method described in this embodiment.
- the demodulation codebook obtained by performing column exchange or multiplying by the constant coefficient or all the codewords to perform row exchange may also use the extraction method described in this embodiment, that is, the method described in the present ⁇ - ⁇
- the codebook extraction method is applicable to the codebook obtained by performing equivalent conversion (column exchange or multiplication by constant coefficient or common exchange of all codewords) on the codewords of the codebooks in the embodiment of the present invention.
- the codewords in C P , C ⁇ UCCH , and C ucclI also have corresponding equivalent transformation representations.
- the present invention can also provide a terminal for feeding back channel state information based on the channel state information feedback method provided by the present invention.
- the application principle is the same as the above method, and details are not described herein again.
- the accuracy of the PMI feedback can be guaranteed under a limited overhead, so that the CST feedback on the PUCCH can still support the precoding technology more effectively, and the feedback compatibility with the PUSCH is good.
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RU2012119779/07A RU2510135C2 (ru) | 2010-09-20 | 2011-08-01 | Способ и терминал для передачи обратной связью информации о состоянии канала |
KR1020127011704A KR101352600B1 (ko) | 2010-09-20 | 2011-08-01 | 채널상태정보 피드백 방법 및 단말 |
JP2012537294A JP5458186B2 (ja) | 2010-09-20 | 2011-08-01 | チャネル状態情報のフィードバック方法及び端末 |
BR112012012867-1A BR112012012867B1 (pt) | 2010-09-20 | 2011-08-01 | Método para a retroalimentação de informações de situação de canal e terminal |
MX2012006338A MX2012006338A (es) | 2010-09-20 | 2011-08-01 | Metodo y terminal para realimentacion de informacion del estado del canal. |
US13/505,866 US8532218B2 (en) | 2010-09-20 | 2011-08-01 | Method and terminal for channel state information feedback |
ES11826299T ES2776104T3 (es) | 2010-09-20 | 2011-08-01 | Método y terminal para retroalimentación de información de estado de canal |
EP11826299.7A EP2621107B1 (en) | 2010-09-20 | 2011-08-01 | Method and terminal for channel state information feedback |
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CN201010290522.1 | 2010-09-20 | ||
CN201010290522.1A CN101944985B (zh) | 2010-09-20 | 2010-09-20 | 一种信道状态信息反馈方法 |
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US (1) | US8532218B2 (zh) |
EP (1) | EP2621107B1 (zh) |
JP (1) | JP5458186B2 (zh) |
KR (1) | KR101352600B1 (zh) |
CN (1) | CN101944985B (zh) |
BR (1) | BR112012012867B1 (zh) |
ES (1) | ES2776104T3 (zh) |
MX (1) | MX2012006338A (zh) |
RU (1) | RU2510135C2 (zh) |
WO (1) | WO2012037772A1 (zh) |
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CN102916768B (zh) * | 2012-09-19 | 2016-06-29 | 华为技术有限公司 | 高速专用物理控制信道的反馈方法、装置和系统 |
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EP3306826B1 (en) * | 2012-10-03 | 2019-06-05 | Sckipio Technologies S.i Ltd | Hybrid precoder |
CN104184560A (zh) * | 2013-05-24 | 2014-12-03 | 中兴通讯股份有限公司 | 信道状态信息反馈方法和终端 |
WO2014196822A1 (ko) | 2013-06-05 | 2014-12-11 | 엘지전자 주식회사 | 무선 통신 시스템에서 채널상태정보 전송 방법 및 장치 |
US20140362940A1 (en) * | 2013-06-07 | 2014-12-11 | Nec Laboratories America, Inc. | Channel State Information (CSI) Feedback and Subsampling |
CN105515730B (zh) * | 2014-09-22 | 2018-07-10 | 中兴通讯股份有限公司 | 信道信息的反馈方法、装置及系统 |
US10536984B2 (en) * | 2015-01-30 | 2020-01-14 | Telefonaktiebolaget Lm Ericsson (Publ) | Communicating control data in a wireless communication network |
CN106612134A (zh) * | 2015-10-23 | 2017-05-03 | 中国移动通信集团公司 | 一种码本反馈方法及装置 |
CN109891767A (zh) * | 2016-11-26 | 2019-06-14 | 华为技术有限公司 | 一种确定预编码矩阵的方法、装置及系统 |
SG11201906429TA (en) | 2017-03-31 | 2019-08-27 | Lg Electronics Inc | Method for transmitting uplink data in wireless communication system and apparatus therefor |
CN111064499B (zh) | 2018-10-16 | 2023-11-10 | 华为技术有限公司 | 指示和确定预编码向量的方法以及通信装置 |
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2010
- 2010-09-20 CN CN201010290522.1A patent/CN101944985B/zh active Active
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2011
- 2011-08-01 KR KR1020127011704A patent/KR101352600B1/ko active IP Right Grant
- 2011-08-01 ES ES11826299T patent/ES2776104T3/es active Active
- 2011-08-01 MX MX2012006338A patent/MX2012006338A/es active IP Right Grant
- 2011-08-01 WO PCT/CN2011/001264 patent/WO2012037772A1/zh active Application Filing
- 2011-08-01 US US13/505,866 patent/US8532218B2/en active Active
- 2011-08-01 JP JP2012537294A patent/JP5458186B2/ja active Active
- 2011-08-01 RU RU2012119779/07A patent/RU2510135C2/ru active
- 2011-08-01 EP EP11826299.7A patent/EP2621107B1/en active Active
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CN101686079A (zh) * | 2008-09-25 | 2010-03-31 | 三星电子株式会社 | 网络mimo系统及其信令处理方法 |
CN101426225A (zh) * | 2008-12-09 | 2009-05-06 | 中兴通讯股份有限公司 | 一种终端上报信道质量指示报告的方法 |
CN101944985A (zh) * | 2010-09-20 | 2011-01-12 | 中兴通讯股份有限公司 | 一种信道状态信息反馈方法 |
Also Published As
Publication number | Publication date |
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US8532218B2 (en) | 2013-09-10 |
JP5458186B2 (ja) | 2014-04-02 |
CN101944985B (zh) | 2015-03-25 |
EP2621107A4 (en) | 2017-02-15 |
KR101352600B1 (ko) | 2014-01-17 |
EP2621107B1 (en) | 2019-11-27 |
ES2776104T3 (es) | 2020-07-29 |
BR112012012867B1 (pt) | 2021-09-21 |
KR20120080235A (ko) | 2012-07-16 |
US20120224652A1 (en) | 2012-09-06 |
CN101944985A (zh) | 2011-01-12 |
BR112012012867A2 (pt) | 2019-12-31 |
EP2621107A1 (en) | 2013-07-31 |
MX2012006338A (es) | 2012-10-09 |
JP2013509838A (ja) | 2013-03-14 |
RU2510135C2 (ru) | 2014-03-20 |
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