CN102263613B - A kind of channel state information feedback method and device - Google Patents
A kind of channel state information feedback method and device Download PDFInfo
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- CN102263613B CN102263613B CN201110225533.6A CN201110225533A CN102263613B CN 102263613 B CN102263613 B CN 102263613B CN 201110225533 A CN201110225533 A CN 201110225533A CN 102263613 B CN102263613 B CN 102263613B
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Abstract
The invention discloses a kind of channel state information feedback method and device, can obtain channel condition information, and feed back the channel condition information according to feedback on reservation method on PUSCH.The information feedback technology of the present invention, channel condition information can be determined according to channel information, corresponding feedback model is selected according to reporting schemes, and use the feedback model feeding back channel state information, solve the problems, such as that the system performance caused by channel information feedback method expense is bigger in the prior art is poor, so as to improve the performance of feedback accuracy and communication system.
Description
Technical field
The present invention relates to the communications field, and in particular to a kind of channel state information feedback method and device.
Background technology
In wireless communication system, transmitting terminal and receiving terminal take the mode of spatial reuse to obtain higher using more antennas
Speed.Relative to general method for spacial multiplex, a kind of technology of enhancing is that receiving terminal feeds back to transmitting terminal channel information, hair
Sending end, using transmitting precoding technique, can be greatly enhanced transmission performance according to the channel information of acquisition.It is more for single user
Multi output (SU-MIMO, Single User Multi-input Multi-output) is inputted, directly uses channel characteristics vector
Information carries out precoding；For multiuser MIMO (MU-MIMO), it is necessary to which more accurately channel information instructs multi-user to prelist
Code.
In 3GPP Long Term Evolutions (Long Term Evolution, LTE) in the works, the feedback of channel information is mainly profit
It is accurate to be fed back with the performance of the feedback method of better simply single code book, and the transmitting precoding technique of MIMO dependent on code book
Degree.
In the standard of LTE, the minimum feedback unit of channel information is subband (Subband), and a subband is by several
Resource block (RB, Resource Block) forms, and each RB is made of multiple resource units (RE, Resource Element)；
RE is the least unit of running time-frequency resource in LTE.Corresponding object can be subband during user equipment (UE) feedback channel information
Or multiple subbands, and broadband (Wideband) (Subband),.
There are many transmission modes and feedback model, several main transmission modes are as follows in LTE：
Pattern 1：Single antenna port：(the Single-antenna port of port 0：port 0)；
Pattern 2：Transmitting diversity (Transmit diversity)；
Pattern 3：Open-Loop Spatial Multiplexing (Open-loop spatial multiplexing)；
Pattern 4：Closed-Loop Spatial Multiplexing (Closed-loop spatial multiplexing)；
Pattern 5：Multi-user's multiple-input and multiple-output (Multi-user MIMO)；
Pattern 6：Closed loop Rank=1 precodings (Closed-loop Rank=1precoding)；
Mode 7：Single current beamforming：(the Single-antenna port of port 5：port 5).
There are different feedback models and feedback content under different transmission modes.During spatial reuse, uplink channel information
Feedback content mainly has three kinds：
Precoding matrix indicators information (PMI), characteristic feature Vector Message, recommends base station, for downlink precoding
Technology.
PMI is the index of an instruction code word, and the code word of instruction is used for characteristic feature Vector Message.In four-antenna system
In, PMI information includes list PMI；In eight antenna systems, PMI information includes i1 and i2.
Order designator information (RI), characterizes the order of channel, recommends the number of plies that base station is supported as downlink.
Channel quality indication (CQI) information (CQI), characterize the quality information of channel, and letter is characterized with the modulation coding scheme of recommendation
The modulation coding scheme of road quality, more high-order represents that performance is better.
The important channel information of the above (PMI/RI/CQI) is divided into following two in the feedback kind of uplink：
Periodic feedback, the feedback being mainly carried on Physical Uplink Control Channel (PUCCH).
Non-periodic feedback, the feedback being carried on Physical Uplink Shared Channel (PUSCH).
Periodic feedback must configure, and non-periodic feedback is the feedback of irregular flip-over type；It is aperiodic on PUSCH
Feedback is a kind of higher feedback of precision, belongs to the feedback of auxiliary, for putting forward high-precision feedback.
The feedback model of non-periodic feedback is as shown in table 1：
Table 1
In Mode x-y in table 1, x represents the feedback of CQI, and 1 is the feedback of Wideband CQI, and 2 be Subband CQI
Feedback, 3 be the high-rise CQI feedback configured.
Y represents PMI feedbacks, and 0 is no PMI, and 1 is single PMI, and 2 be multiple PMI.
Closed-Loop Spatial Multiplexing always supports the feedback of PMI, so the feedback model on the PUSCH of its support is：Modes
1-2,2-2,3-1.
Modes1-2：For each Subband, all feed back 1 PMI and feed back CQI for whole bandwidth.
Modes2-2：Feed back a broadband CQI (wideband CQI), and M a broadband PMI, feedback preferable subbands
Positional information, the joint CQI of M subband and the joint PMI of M subband；
Modes3-1：In S subband of bandwidth range of high level configuration, feedback joint CQI, joint PMI, and feedback are each
The single CQI of subband.
In actual feedback, RI also with above-mentioned CQI information and PMI information same PUSCH subframe internal feedback.
RI is restricted to a numerical value in the range of 1 to N, N=min (Nt, Nr)；Wherein, Nt represents transmitting antenna number, and Nr represents to connect
Receive antenna number.
The feedback of CQI is broadly divided into subband CQI (subband CQI) and broadband CQI, that is, multiple subbands in implication
Joint CQI.Its implication assumes that the CQI grades that can be supported when downlink is transmitted using a subband and assumes that downlink uses respectively
The CQI grades that can be supported during multiple subband common transports.
CQI otherwise for same resource units can be 1 or 2.Mainly related with RI, when RI=1 is 1 CQI；
It is 2 CQI during RI ＞ 1.It is 4bit during 1 CQI；When feeding back 2 CQI, the 2nd CQI uses differential technique, based on the 1st CQI
Difference, is 3bit.As it can be seen that the maximum cost of the feedback method is 11bit, this is also that CSI information is most when being fed back on PUCCH
Big supported expense.
CQI is an index for weighing down channel quality quality.In 36-213 agreements CQI with 0 to 15 integer value
To represent, different CQI grades are represented respectively, and different CQI correspond to respective modulation system and encoder bit rate (MCS).
RI is used for the number for describing space independent channel, the order of respective channels response matrix.In Open-Loop Spatial Multiplexing and close
, it is necessary to which UE feeds back RI information under annular space multiplexer mode, RI information need not be fed back under other patterns.
PMI refers to the call number of the precoding codebook of UE feedbacks.Closed-Loop Spatial Multiplexing, MU-MIMO, RI=1 closed loop this 3
, it is necessary to feed back PMI information under kind pattern, PMI information is not fed back under other emission modes.
Specifically, the cqi definition occurred in LTE is various, and according to different principles, CQI can be divided as follows：
Broadband CQI and subband CQI are divided into according to Measurement bandwidth；
Wideband CQI refer to the channel status instruction to all subband, and what is obtained is on subband set S
CQI information, namely broadband CQI information；
Subband CQI refer to the CQI information of each subband.LTE corresponds to effective bandwidth according to different system bandwidths
RB (Resource Block, resource block) divide into several RB groups, each RB group be referred to as subband.
Subband CQI can be divided into full subband CQI feedback (all subband CQI) again and optimal M subband CQI is anti-
Present (Best M CQI)：Full subband CQI reports the CQI information of all subbands；Best M CQI are to select M from sets of subbands S
A subband, reports the CQI information of this M subband, and reports the positional information of M subband at the same time.
Single current CQI and double fluid CQI are divided into according to code stream number；
Single current CQI：Applied to single-antenna transmission port0, port5, transmitting diversity, the closed loop space of MU-MIMO, RI=1
Multiplexing, UE reports the CQI information of single code stream at this time；
Double-current CQI：Applied to Closed-Loop Spatial Multiplexing pattern.For Open-Loop Spatial Multiplexing pattern, due to channel condition information
It is unknown, and equilibrium treatment has been carried out to double-current channel information in precoding, therefore under Open-Loop Spatial Multiplexing, the CQI of 2 code streams
It is equal.
Absolute value CQI and differential CQI (Differential CQI) are divided into according to CQI method for expressing
Absolute value CQI is exactly the CQI indexes (CQI index) represented with 4bit；
Differential CQI (Differential CQI) is the CQI index represented with 2bit or 3bit；Differential CQI is divided into again
2nd code stream relative to the differential CQI of the 1st code stream, subband CQI relative to subbandCQI differential CQI and
Suband CQI relative to broadband CQI differential CQI.
It is divided into wideband CQI, UE selected (subband CQI), High layer according to CQI reporting schemes
configured(subband CQI)；
Wideband CQI refer to the CQI information of subband set S；
UE selected (subband CQI) i.e. Best M CQI, feed back the CQI information of selected M subband, together
When report the position of M subband；
High layer configured (subband CQI) are full subband CQI, for each subband feedback
One CQI information.
High layer configured and UE selected are the feedback systems of subband CQI.
In lte-a system, information feedback can be completed by following steps：
Step 1：Estimate down channel for UE to UE pilot signal transmitteds in base station.
Step 2：UE estimates down channel according to pilot signal.
Step 3：UE determines channel condition information, including RI, PMI and CQI.
Step 4：UE is according to feedback model to base station feedback channel condition information.
Senior long term evolution (Long Term Evolution Advanced, LTE-A) the evolution mark of system as LTE
Standard, supports the system bandwidth (reaching as high as 100MHz) of bigger, and the existing standards of backward compatibility LTE.In order to obtain higher
Cell mean spectral efficiency and covering and the handling capacity for improving cell edge, LTE-A is on the basis of existing LTE system, downlink
Support most 8 antennas, and some feedback enhancing technologies are proposed in terms of code book feedback, mainly strengthen code book
Feedback accuracy and drawed in one's expenditure using the temporal correlation and/or frequency domain correlation of channel information.Above-mentioned technology can be improved and drilled
Into ternational Mobile Telecommunications (International Mobile Telecommunications-Advance, IMT-Advance)
The availability of frequency spectrum of system, alleviation frequency spectrum resource are in short supply.Meanwhile the design and enhancing of code book are also required to take into full account that dual polarization is believed
The feature in road.New code book enhancing technological core is to represent a pre-coding matrix jointly using two indexes of i1 and i2.
At present, multi-antenna technology has been widely used in lte-a system, and thing followed multiple antennas calibration problem is also drawn
Extensive concern is played.Antenna calibration problem refers to：In multi-antenna systems, there are regular hour delay between each antenna
And phase error, the change of channel condition caused by these errors will influence the selection of CQI and PMI, so as to influence whole
The performance of telecommunications system.And when CQI the and PMI precision of feedback is inadequate, it will so that the performance damage that antenna calibration problem is brought
Lose more obvious.
When Closed-Loop Spatial Multiplexing system supports feedback model 2-2, feedback content includes broadband CQI, broadband PMI, and M
The joint CQI of a subband and joint PMI of M subband, and broadband RI.Since selections of the RI to PMI and CQI is most important,
Therefore, the feedback accuracy of RI influences system performance very big.Again since antenna calibration and feedback delay and scheduling delay are asked
Topic so that channel condition during transmission data and channel condition during feedback are not inconsistent, can serious shadow when RI feedback accuracies are insufficient
Ring the accuracy of RI.
The content of the invention
In view of this, it is a primary object of the present invention to provide a kind of channel state information feedback method and device, to carry
High feedback accuracy, lifting system performance.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of channel state information feedback method, this method include：
Terminal obtains channel condition information, and physically on row shared channel PUSCH according to feedback on reservation Mode Feedback
The channel condition information；
Wherein, the channel condition information includes at least one of：Channel quality indication (CQI) information CQI, pre-coding matrix
Indicator information PMI, order designator information RI；The RI includes the joint RI that M son takes；
In four-antenna system, the PMI information is list PMI；In eight antenna systems, the PMI information is included and prelisted
Code Matrix Indicator information i1 and i2.
The channel condition information that terminal is fed back includes：
Broadband channel information, M son take the precoding matrix indicators information PMI of each subband, and M son takes each
The joint RI that the CQI of subband and M son take；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information i2 of each subband, and M son takes each
The joint RI that the CQI of subband and M son take；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information PMI of each subband, the connection that M son takes
Close the joint RI that CQI and M son take；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information i2 of each subband, the connection that M son takes
Close the joint RI that CQI and M son take；Alternatively,
Broadband channel information, the joint precoding matrix indicators information i2 that M son takes, M son take each subband
CQI and the joint RI that takes of M son；Alternatively,
Broadband channel information, joint the precoding matrix indicators information i2, the joint CQI that M son takes that M son takes
The joint RI taken with M son；Alternatively,
Broadband channel information, the joint precoding matrix indicators information PMI that M son takes, M son take each subband
CQI and the joint RI that takes of M son；Alternatively,
Broadband channel information, the joint precoding matrix indicators information PMI that M son takes, the joint that M son takes
The joint RI that CQI and M son take；
Wherein, M is less than the subband number that system bandwidth is included.
The M subband is discontinuous subband.
The channel condition information that terminal is fed back includes：
Broadband channel information, M son take the precoding matrix indicators information i2 of each subband, and M son takes each
The joint RI that the CQI of subband and M son take；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information i2 of each subband, the connection that M son takes
Close the joint RI that CQI and M son take；Alternatively,
Broadband channel information, the joint precoding matrix indicators information i2 that M son takes, M son take each subband
CQI and the joint RI that takes of M son；Alternatively,
Broadband channel information, joint the precoding matrix indicators information i2, the joint CQI that M son takes that M son takes
The joint RI taken with M son；Alternatively,
Broadband channel information, the joint precoding matrix indicators information PMI that M son takes, M son take each subband
CQI and the joint RI that takes of M son；Alternatively,
Broadband channel information, the joint precoding matrix indicators information PMI that M son takes, the joint that M son takes
The joint RI that CQI and M son take；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information PMI of each subband, the connection that M son takes
Close the joint RI that CQI and M son take；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information PMI of each subband, and M son takes each
The joint RI that the CQI of subband and M son take；
Wherein, M is less than the subband number that system bandwidth is included.
The M subband is continuous subband.
The broadband channel information includes one below and combinations thereof：Broadband CQI, broadband PMI, on the broadband width
Precoding designator i2, broadband RI on precoding designator i1, the broadband width.
The broadband CQI includes one below and combinations thereof：Broadband CQI, broadband CQI；The differential CQI is different codes
Differential CQI between word stream；
Differential CQI between the streams of code words is：When there is two streams of code words, the broadband CQI of second streams of code words is base
In the differential CQI of first streams of code words broadband CQI.
The CQI that the M son takes each subband includes one below and combinations thereof：M son takes the exhausted of each subband
CQI, M sons are taken with the differential CQI of each subband；The differential CQI is one of the following：Differential CQI based on broadband CQI；Base
In the differential CQI of one of subband CQI；The differential CQI of joint CQI based on M subband；Difference between different streams of code words
CQI；
Differential CQI between the streams of code words is：When there is two streams of code words, the subband CQI of second streams of code words is base
In the differential CQI of the corresponding subband CQI of first streams of code words.
The joint CQI that the M son takes includes one below and combinations thereof：Joint CQI, the M subband that M son takes
On joint differential CQI；The differential CQI is one of the following：Differential CQI based on broadband CQI；Difference between different streams of code words
CQI；
Differential CQI between the streams of code words is：When there is two streams of code words, the connection of M subband of second streams of code words
Close the differential CQI that CQI is the joint CQI of the M subband based on first streams of code words.
A kind of information feedback device, the device include：
Acquisition module, channel condition information is obtained for terminal；
Feedback module, for terminal on PUSCH according to channel condition information described in feedback on reservation Mode Feedback.
The feedback module is used to feed back following channel condition information according to one of following feedback system on PUSCH：
Broadband channel information, M son take the precoding matrix indicators information i2 of each subband, and M son takes each
The joint RI that the CQI of subband and M son take；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information i2 of each subband, the connection that M son takes
Close the joint RI that CQI and M son take；Alternatively,
Broadband channel information, the joint precoding matrix indicators information i2 that M son takes, M son take each subband
CQI and the joint RI that takes of M son；Alternatively,
Broadband channel information, joint the precoding matrix indicators information i2, the joint CQI that M son takes that M son takes
The joint RI taken with M son；Alternatively,
Broadband channel information, the joint precoding matrix indicators information PMI that M son takes, M son take each subband
CQI and the joint RI that takes of M son；Alternatively,
Broadband channel information, the joint precoding matrix indicators information PMI that M son takes, the joint that M son takes
The joint RI that CQI and M son take；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information PMI of each subband, the connection that M son takes
Close the joint RI that CQI and M son take；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information PMI of each subband, and M son takes each
The joint RI that the CQI of subband and M son take；Wherein, M is less than the subband number that system bandwidth is included,
The M subband that the feedback module is applied is discontinuous subband；
Wherein, the broadband channel information includes one below and combinations thereof：Broadband CQI, broadband PMI, the broadband band
Precoding designator i2, the broadband RI on precoding designator i1, the broadband width on width；
Alternatively, the feedback module is used on PUSCH feed back following channel status letter according to one of following feedback model
Breath：
Broadband channel information, M son take the precoding matrix indicators information i2 of each subband, and M son takes each
The joint RI that the CQI of subband and M son take；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information i2 of each subband, the connection that M son takes
Close the joint RI that CQI and M son take；Alternatively,
Broadband channel information, the joint precoding matrix indicators information i2 that M son takes, M son take each subband
CQI and the joint RI that takes of M son；Alternatively,
Broadband channel information, joint the precoding matrix indicators information i2, the joint CQI that M son takes that M son takes
The joint RI taken with M son；Alternatively,
Broadband channel information, the joint precoding matrix indicators information PMI that M son takes, M son take each subband
CQI and the joint RI that takes of M son；Alternatively,
Broadband channel information, the joint precoding matrix indicators information PMI that M son takes, the joint that M son takes
The joint RI that CQI and M son take；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information PMI of each subband, the connection that M son takes
Close the joint RI that CQI and M son take；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information PMI of each subband, and M son takes each
The joint RI that the CQI of subband and M son take；
Wherein, M is less than the subband number that system bandwidth is included；
The M subband that the feedback module is applied is continuous subband；
The broadband channel information includes one below and combinations thereof：Broadband CQI, broadband PMI, on the broadband width
Precoding designator i2, broadband RI on precoding designator i1, the broadband width.
A kind of terminal, the terminal include information determination module and information feedback module；Wherein,
Described information determining module, feedback method is determined for determining channel condition information, and according to configured information；
Described information feedback module, for according to the feedback method, by PUSCH by determined by information determination module
Channel condition information is sent to base station.
Described information determining module is used to determine joint RI that broadband RI and M son take according to configured information；And according to
The joint RI that newest broadband RI and M son take determines CQI and PMI.
The feedback module is used for the joint RI for taking the broadband RI and M son, and CQI and PMI information are sent
To base station.
The configured information is the high-rise configuration signal information that base station is sent；
The CQI includes one below and combinations thereof：Per height in the joint CQI and M subband of broadband CQI, M subband
The CQI of band；
In four-antenna system, the PMI includes one below and combinations thereof：Joint PMI, M of broadband PMI, M subband
The PMI of each subband on height band；
In eight antenna systems, the PMI includes one below and combinations thereof：The connection of broadband i1, broadband i2, M subband
Close the i2 that i2, M sons take each subband.
The information feedback technology of the present invention, can determine channel condition information, according to upper according to channel information
Report mode selects corresponding feedback model, and uses the feedback model feeding back channel state information, solves and believes in the prior art
The problem of system performance caused by road information feedback method expense is bigger is poor, so as to improve feedback accuracy and communication
The performance of system.
Brief description of the drawings
Fig. 1 is the information feedback flow chart of the embodiment of the present invention；
Fig. 2 is the information feedback flow chart of the preferred embodiment of the present invention one；
Fig. 3 is the information feedback installation drawing of the embodiment of the present invention one.
Embodiment
Come that the present invention will be described in detail below with reference to attached drawing and in conjunction with the embodiments.It should be noted that do not conflicting
In the case of, the feature in embodiment and embodiment in the application can be mutually combined.
Referring to Fig. 1, Fig. 1 is the information feedback flow chart of the embodiment of the present invention, and flow shown in Fig. 1 includes following
Step：
S102：Terminal obtains channel condition information, including：CQI, PMI and RI；Wherein, in eight antenna systems, PMI letters
Breath includes precoding designator i1 and i2；In four-antenna system, PMI information includes list PMI.
S104：Terminal is on PUSCH according to feedback on reservation Mode Feedback channel condition information.
By above-mentioned steps, terminal obtains channel condition information, according to feedback on reservation Mode Feedback channel shape on PUSCH
State information, overcomes the problem of feedback of channel information Mode Feedback information is inaccurate in the prior art, improves feedback accuracy, from
And improve the performance of communication system.
Preferably, in S104, the channel condition information that terminal is fed back includes：
Broadband channel information, M son take the precoding matrix indicators information i2 of each subband, and M son takes each
The joint RI that the CQI of subband and M son take；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information i2 of each subband, the connection that M son takes
Close the joint RI that CQI and M son take；Alternatively,
Broadband channel information, the joint precoding matrix indicators information i2 that M son takes, M son take each subband
CQI and the joint RI that takes of M son；Alternatively,
Broadband channel information, joint the precoding matrix indicators information i2, the joint CQI that M son takes that M son takes
The joint RI taken with M son；Alternatively,
Broadband channel information, the joint precoding matrix indicators information PMI that M son takes, M son take each subband
CQI and the joint RI that takes of M son；Alternatively,
Broadband channel information, the joint precoding matrix indicators information PMI that M son takes, the joint that M son takes
The joint RI that CQI and M son take；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information PMI of each subband, the connection that M son takes
Close the joint RI that CQI and M son take；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information PMI of each subband, and M son takes each
The joint RI that the CQI of subband and M son take；
Wherein, M is less than the subband number that system bandwidth is included.Preferably, M subband can be in above-mentioned feedback method
Discontinuous subband, or continuous subband.
Preferably, broadband CQI can include differential CQI, and wherein differential CQI is one of the following：Difference between streams of code words
Divide CQI；Preferably, when there is two streams of code words, the broadband CQI of second streams of code words can be based on first streams of code words broadband
The differential CQI of CQI.
Preferably, the CQI that M son takes each subband can be differential CQI, wherein, differential CQI is one of the following：Base
In the differential CQI of broadband CQI；Differential CQI based on one of subband CQI；The difference of joint CQI based on M subband
CQI；Differential CQI between different streams of code words；Especially, when there is two streams of code words, the subband CQI of second streams of code words can be with
It is the differential CQI based on the corresponding subband CQI of first streams of code words.
Preferably, the joint CQI that M son takes can be differential CQI, wherein, differential CQI is one of the following：Based on width
Differential CQI with CQI；Differential CQI between different streams of code words；When there is two streams of code words, M subband of second streams of code words
Joint CQI can be the M subband based on first streams of code words joint CQI differential CQI.
By above preferred embodiment, CQI is transmitted using differential mode, reduces expense, and improve precision.
Embodiment one
Flow shown in Figure 2, the flow include the following steps：
Downlink channel condition is tested in S201, base station to terminal pilot signal transmitted for UE；
S203, the terminal estimate downlink channel condition according to the pilot signal received, obtain channel condition information；Institute
Stating channel condition information includes：CQI information, PMI information and RI information；
Wherein, in eight antenna systems, the PMI information includes precoding designator i1 and i2；In four-antenna system,
The PMI information includes list PMI；
S205, the terminal is on PUSCH according to feedback on reservation Mode Feedback channel condition information.
Wherein, the channel condition information that the terminal is fed back on the PUSCH includes：
Broadband channel information, M son take the precoding matrix indicators information i2 of each subband, and M son takes each
The joint RI that the CQI of subband and M son take；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information i2 of each subband, the connection that M son takes
Close the joint RI that CQI and M son take；Alternatively,
Broadband channel information, the joint precoding matrix indicators information i2 that M son takes, M son take each subband
CQI and the joint RI that takes of M son；Alternatively,
Broadband channel information, joint the precoding matrix indicators information i2, the joint CQI that M son takes that M son takes
The joint RI taken with M son；Alternatively,
Broadband channel information, the joint precoding matrix indicators information PMI that M son takes, M son take each subband
CQI and the joint RI that takes of M son；Alternatively,
Broadband channel information, the joint precoding matrix indicators information PMI that M son takes, the joint that M son takes
The joint RI that CQI and M son take；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information PMI of each subband, the connection that M son takes
Close the joint RI that CQI and M son take；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information PMI of each subband, and M son takes each
The joint RI that the CQI of subband and M son take；
Wherein, M is less than the subband number that system bandwidth is included.
Wherein, the joint CQI that M son takes is following one and combinations thereof：Joint CQI, the M subband that M son takes
On joint differential CQI；
Wherein, the CQI that M son takes each subband is following one and combinations thereof：M son take each subband CQI,
M son takes the differential CQI of each subband；
Wherein, the broadband channel information can include：Broadband RI, broadband CQI and broadband PMI；Alternatively, the broadband letter
Road information can include：Broadband RI, broadband CQI, broadband i1 and broadband i2；
Wherein, M subband can be continuous subband, or discontinuous subband；
Wherein, broadband CQI is following one and combinations thereof：Broadband CQI, broadband CQI；In practical applications, such as Fig. 3
It is shown, a kind of feedback terminal can be designed based on above-mentioned technology description, including：
Acquisition module 32, for obtaining channel condition information, including：CQI information, PMI information and RI information；
In eight antenna systems, the PMI includes precoding designator i1 and i2；In four-antenna system, the PMI bags
Include single PMI；
Feedback module 34, on PUSCH according to feedback on reservation Mode Feedback channel condition information, the letter of feedback
Channel state information includes：
Broadband channel information, M son take the precoding matrix indicators information i2 of each subband, and M son takes each
The joint RI that the CQI of subband and M son take；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information i2 of each subband, the connection that M son takes
Close the joint RI that CQI and M son take；Alternatively,
Broadband channel information, the joint precoding matrix indicators information i2 that M son takes, M son take each subband
CQI and the joint RI that takes of M son；Alternatively,
Broadband channel information, joint the precoding matrix indicators information i2, the joint CQI that M son takes that M son takes
The joint RI taken with M son；Alternatively,
Broadband channel information, the joint precoding matrix indicators information PMI that M son takes, M son take each subband
CQI and the joint RI that takes of M son；Alternatively,
Broadband channel information, the joint precoding matrix indicators information PMI that M son takes, the joint that M son takes
The joint RI that CQI and M son take；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information PMI of each subband, the connection that M son takes
Close the joint RI that CQI and M son take；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information PMI of each subband, and M son takes each
The joint RI that the CQI of subband and M son take；
Wherein, M is less than the subband number that system bandwidth is included.
Wherein M subband can be continuous subband, or discontinuous subband；
Wherein, the broadband channel information includes one below and combinations thereof：Broadband CQI, broadband CQI, the width
The precoding designator i2 on precoding designator i1, the broadband width with the PMI in bandwidth, on the broadband width,
Broadband RI；
The feedback model for the channel condition information that the present embodiment is fed back by increase on PUSCH, has adapted to antenna calibration
With the application of code book enhancing technology, feedback accuracy is improved, so as to considerably improve system performance.
Embodiment two
In eight antenna transmissions, channel condition information includes CQI, PMI and RI.Wherein, due to eight antenna enhancement technologies
Using PMI information includes precoding designator i1 and i2.Specifically, carry out non-periodic feedback on PUSCH, and from son
With the M subband selected in set S, the process that UE carries out information feedback includes the following steps：
Step 1：Terminal determines channel condition information according to pilot signal, including CQI, RI and precoding designator i1 and
i2。
Step 2：Terminal is on PUSCH to base station reporting status information of channel.
Preferably, in step 2, UE according to one of following feedback model on PUSCH to base station feedback channel condition information：
Mode one：UE reports the joint CQI of M subband；UE reports the i1 in S sets of subbands, while reports S subband
On the joint i2 that takes of i2 and M son；UE reports broadband CQI for each streams of code words；UE reports broadband RI；UE reports M son
The joint RI taken；
Wherein, when streams of code words number is more than 1, the broadband CQI information of other streams of code words can be relative to first code
The differential CQI of word stream CQI information；
Wherein, when streams of code words number is more than 1, the joint CQI information that M son of other streams of code words takes can be opposite
In the differential CQI for the joint CQI information that M son of first streams of code words takes；Alternatively, all streams of code words or partial codeword stream
The joint CQI information that M son takes is the differential CQI relative to broadband CQI information.When streams of code words number is 1, M subband
CQI information can be absolute cqi value, or relative to the differential CQI of broadband CQI information；
Mode two：UE reports M son to take the CQI of each subband；UE reports the i1 in S sets of subbands, while reports S
The joint i2 that i2 and M son on height band take；UE reports broadband CQI for each streams of code words；UE reports broadband RI；UE is reported
The joint RI that M son takes；
Wherein, when streams of code words number is more than 1, the broadband CQI information of other streams of code words can be relative to first code
The differential CQI of word stream CQI information；
Wherein, when streams of code words number is more than 1, the CQI information that M son of other streams of code words takes each subband can be
The differential CQI of the CQI information of each subband is taken relative to M son of first streams of code words；Alternatively, all streams of code words or part
The CQI information that M son of streams of code words takes each subband is the differential CQI relative to broadband CQI information.When streams of code words number is
When 1, the CQI information of each subband of M subband can be absolute cqi value, or relative to the difference of broadband CQI information
CQI；
Mode three：UE reports the joint CQI of M subband；UE reports the i1 in S sets of subbands, while reports S subband
On i2 and M son take the i2 of each subband；UE reports broadband CQI for each streams of code words；UE reports broadband RI；UE reports M
Joint RI on height band；
Wherein, when streams of code words number is more than 1, the broadband CQI information of other streams of code words can be relative to first code
The differential CQI of word stream CQI information；
Wherein, when streams of code words number is more than 1, the joint CQI information that M son of other streams of code words takes can be opposite
In the differential CQI for the joint CQI information that M son of first streams of code words takes；Alternatively, all streams of code words or partial codeword stream
The joint CQI information that M son takes is the differential CQI relative to broadband CQI information.When streams of code words number is 1, M subband
CQI information can be absolute cqi value, or relative to the differential CQI of broadband CQI information；
Mode four：UE reports M son to take the CQI of each subband；UE reports the i1 in S sets of subbands, while reports S
I2 and M son on height band take the i2 of each subband；UE reports broadband CQI for each streams of code words；UE reports broadband RI；UE
Report the joint RI that M son takes；
Wherein, when streams of code words number is more than 1, the broadband CQI information of other streams of code words can be relative to first code
The differential CQI of word stream CQI information；
Wherein, when streams of code words number is more than 1, the CQI information that M son of other streams of code words takes each subband can be
The differential CQI of the CQI information of each subband is taken relative to M son of first streams of code words；Alternatively, all streams of code words or part
The CQI information that M son of streams of code words takes each subband is the differential CQI relative to broadband CQI information.When streams of code words number is
When 1, the CQI information of each subband of M subband can be absolute cqi value, or relative to the difference of broadband CQI information
CQI；
Wherein, the selected M subband that S son takes can be continuous subband, or discontinuous subband.
Embodiment three
In four antenna transmissions, channel condition information includes CQI, PMI and RI.Specifically, carried out on PUSCH aperiodic
Feedback, and when the M subband selected from sets of subbands S is discontinuous subband, the mistake of UE progress information feedbacks
Journey includes the following steps：
In four antenna transmissions, channel condition information includes CQI, PMI and RI.Specifically, carried out on PUSCH aperiodic
Feedback, and the M subband selected from sets of subbands S, the process that UE carries out information feedback include the following steps：
Step 1：Terminal determines channel condition information, including CQI, RI and precoding designator PMI according to pilot signal
Information.
Step 2：Terminal is on PUSCH to base station reporting status information of channel.
Preferably, in step 2, UE according to one of following feedback model on PUSCH to base station feedback channel condition information：
Mode one：UE reports the joint CQI of M subband；UE reports the PMI in S sets of subbands, while reports M son
The joint PMI taken；UE reports broadband CQI for each streams of code words；UE reports broadband RI；UE reports the joint RI that M son takes；
Wherein, when streams of code words number is more than 1, the broadband CQI information of other streams of code words can be relative to first code
The differential CQI of word stream CQI information；
Wherein, when streams of code words number is more than 1, the joint CQI information that M son of other streams of code words takes can be opposite
In the differential CQI for the joint CQI information that M son of first streams of code words takes；Alternatively, all streams of code words or partial codeword stream
The joint CQI information that M son takes is the differential CQI relative to broadband CQI information.When streams of code words number is 1, M subband
CQI information can be absolute cqi value, or relative to the differential CQI of broadband CQI information；
Mode two：UE reports M son to take the CQI of each subband；UE reports the PMI in S sets of subbands, reports at the same time
The joint PMI that M son takes；UE reports broadband CQI for each streams of code words；UE reports broadband RI；UE reports the connection that M son takes
Close RI；
Wherein, when streams of code words number is more than 1, the broadband CQI information of other streams of code words can be relative to first code
The differential CQI of word stream CQI information；
Wherein, when streams of code words number is more than 1, the CQI information that M son of other streams of code words takes each subband can be
The differential CQI of the CQI information of each subband is taken relative to M son of first streams of code words；Alternatively, all streams of code words or part
The CQI information that M son of streams of code words takes each subband is the differential CQI relative to broadband CQI information.When streams of code words number is
When 1, the CQI information of each subband of M subband can be absolute cqi value, or relative to the difference of broadband CQI information
CQI；
Mode three：UE reports the joint CQI of M subband；UE reports the PMI in S sets of subbands, while reports M son
Take the PMI of each subband；UE reports broadband CQI for each streams of code words；UE reports broadband RI；UE reports the connection that M son takes
Close RI；
Wherein, when streams of code words number is more than 1, the broadband CQI information of other streams of code words can be relative to first code
The differential CQI of word stream CQI information；
Wherein, when streams of code words number is more than 1, the joint CQI information that M son of other streams of code words takes can be opposite
In the differential CQI for the joint CQI information that M son of first streams of code words takes；Alternatively, all streams of code words or partial codeword stream
The joint CQI information that M son takes is the differential CQI relative to broadband CQI information.When streams of code words number is 1, M subband
CQI information can be absolute cqi value, or relative to the differential CQI of broadband CQI information；
Mode four：UE reports M son to take the CQI of each subband；UE reports the PMI in S sets of subbands, reports at the same time
M son takes the PMI of each subband；UE reports broadband CQI for each streams of code words；UE reports broadband RI；UE reports M son to take
Joint RI；
Wherein, when streams of code words number is more than 1, the broadband CQI information of other streams of code words can be relative to first code
The differential CQI of word stream CQI information；
Wherein, when streams of code words number is more than 1, the CQI information that M son of other streams of code words takes each subband can be
The differential CQI of the CQI information of each subband is taken relative to M son of first streams of code words；Alternatively, all streams of code words or part
The CQI information that M son of streams of code words takes each subband is the differential CQI relative to broadband CQI information.When streams of code words number is
When 1, the CQI information of each subband of M subband can be absolute cqi value, or relative to the difference of broadband CQI information
CQI；
Wherein, the selected M subband that S son takes can be continuous subband, or discontinuous subband.
Implementation
The device includes：Acquisition module 32, feedback module 34；Wherein,
Acquisition module 32, for obtaining channel condition information, including：CQI, PMI and RI；
In eight antenna systems, PMI includes precoding designator i1 and i2；In four-antenna system, PMI includes list PMI；
Feedback module 34, is connected to acquisition module 32, for terminal on PUSCH according to feedback on reservation Mode Feedback channel
Status information.
Feedback module 34, which is used for feeding back channel state information, the channel condition information on PUSCH, to be included：
Broadband channel information, M son take the precoding matrix indicators information i2 of each subband, and M son takes each
The joint RI that the CQI of subband and M son take；Or
Broadband channel information, M son take the precoding matrix indicators information i2 of each subband, the connection that M son takes
Close the joint RI that CQI and M son take；Or
Broadband channel information, the joint precoding matrix indicators information i2 that M son takes, M son take each subband
CQI and the joint RI that takes of M son；Or
Broadband channel information, joint the precoding matrix indicators information i2, the joint CQI that M son takes that M son takes
The joint RI taken with M son；Or
Broadband channel information, the joint precoding matrix indicators information PMI that M son takes, M son take each subband
CQI and the joint RI that takes of M son；Or
Broadband channel information, the joint precoding matrix indicators information PMI that M son takes, the joint that M son takes
The joint RI that CQI and M son take；Or
Broadband channel information, M son take the precoding matrix indicators information PMI of each subband, the connection that M son takes
Close the joint RI that CQI and M son take；Or
Broadband channel information, M son take the precoding matrix indicators information PMI of each subband, and M son takes each
The joint RI that the CQI of subband and M son take；
Wherein, M is less than the subband number that system bandwidth is included.
Wherein, the M subband can be discontinuous subband, or continuous subband.
The embodiment of the present invention additionally provides a kind of terminal, for according to configured information to base station feedback channel condition information,
The terminal includes information determination module and information feedback module；Wherein,
Information determination module, channel condition information is determined for terminal, and determines feedback method according to configured information.
Information feedback module, is connected to information determination module, for according to the feedback method, by PUSCH by information
Channel condition information determined by determining module is sent to base station.
Preferably, configured information is the high-rise configuration signal information that base station is sent.
Preferably, information determination module is used for the joint RI that broadband RI and M subband are determined according to configured information；Information is anti-
Feedback module is then used to send the joint RI of the broadband RI and M subband to base station.
Preferably, information determination module can determine CQI and PMI according to the joint RI of newest broadband RI and M subband.
CQI can include the CQI of each subband in broadband CQI and M subband CQI or M subband, and PMI can include list PMI or prelist
Code designator i1 and i2.
It should be noted that the terminal described in above-described embodiment corresponds to above-mentioned embodiment of the method, it is specific real
Existing process had carried out detailed description in embodiment of the method, and details are not described herein.
In summary as it can be seen that either method or device, information feedback technology of the invention can basis
Channel information determines channel condition information, selects corresponding feedback model according to reporting schemes, and feed back using the feedback model
Channel condition information, it is poor to solve the bigger caused system performance of channel information feedback method expense in the prior art
The problem of, so as to improve the performance of feedback accuracy and communication system.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (14)
1. a kind of channel state information feedback method, it is characterised in that this method includes：
Terminal obtains channel condition information, and physically on row shared channel PUSCH according to described in feedback on reservation Mode Feedback
Channel condition information；
Wherein, the channel condition information includes：Channel quality indication (CQI) information CQI, precoding matrix indicators information PMI, order
Indicator information RI；The RI includes the joint RI that M son takes, wherein, M is less than the subband number that system bandwidth is included, M
Preferable subband in the subband that a subband is included by the system bandwidth；
In four-antenna system, the PMI information is list PMI；In eight antenna systems, the PMI information includes precoding square
Battle array indicator information i1 and i2.
2. according to the method described in claim 1, it is characterized in that, the channel condition information that terminal is fed back includes：
Broadband channel information, M son take the precoding matrix indicators information PMI of each subband, and M son takes each subband
CQI and the joint RI that takes of M son；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information i2 of each subband, and M son takes each subband
CQI and the joint RI that takes of M son；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information PMI of each subband, the joint that M son takes
The joint RI that CQI and M son take；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information i2 of each subband, the joint CQI that M son takes
The joint RI taken with M son；Alternatively,
Broadband channel information, the joint precoding matrix indicators information i2 that M son takes, M son take the CQI of each subband
The joint RI taken with M son；Alternatively,
Broadband channel information, the joint precoding matrix indicators information i2 that M son takes, the joint CQI and M that M son takes
Joint RI on height band；Alternatively,
Broadband channel information, the joint precoding matrix indicators information PMI that M son takes, M son take each subband
The joint RI that CQI and M son take；Alternatively,
Broadband channel information, the joint precoding matrix indicators information PMI that M son takes, the joint CQI and M that M son takes
Joint RI on height band.
3. according to the method described in claim 2, it is characterized in that, the M subband is discontinuous subband.
4. according to the method described in claim 2, it is characterized in that, the M subband is continuous subband.
5. according to claim 2 to 4 any one of them method, it is characterised in that
The broadband channel information includes one below and combinations thereof：Broadband CQI, broadband PMI, prelisting on the broadband width
Precoding designator i2, broadband RI on code designator i1, the broadband width.
6. according to the method described in claim 5, it is characterized in that,
The broadband CQI includes one below and combinations thereof：Broadband CQI, broadband CQI；The differential CQI is different streams of code words
Between differential CQI；
Differential CQI between the streams of code words is：When there is two streams of code words, the broadband CQI of second streams of code words is based on the
The differential CQI of one streams of code words broadband CQI.
7. according to claim 2 to 4 any one of them method, it is characterised in that
The CQI that the M son takes each subband includes one below and combinations thereof：M son takes the absolute of each subband
CQI, M sons take the differential CQI of each subband；The differential CQI is one of the following：Differential CQI based on broadband CQI；It is based on
The differential CQI of one of subband CQI；The differential CQI of joint CQI based on M subband；Difference between different streams of code words
CQI；
Differential CQI between the streams of code words is：When there is two streams of code words, the subband CQI of second streams of code words is based on the
The differential CQI of the corresponding subband CQI of one streams of code words.
8. the method according to the description of claim 7 is characterized in that
The joint CQI that the M son takes includes one below and combinations thereof：What CQI, M sons of joint that M son takes took
Joint differential CQI；The differential CQI is one of the following：Differential CQI based on broadband CQI；Differential CQI between different streams of code words；
Differential CQI between the streams of code words is：When there is two streams of code words, the joint CQI of M subband of second streams of code words
It is the differential CQI of the joint CQI of the M subband based on first streams of code words.
9. a kind of information feedback device, it is characterised in that the device includes：
Acquisition module, obtains channel condition information, the channel condition information includes for terminal：Channel quality indication (CQI) information
CQI, precoding matrix indicators information PMI, order designator information RI；The RI includes the joint RI that M son takes, wherein, M
The subband number included less than system bandwidth, preferable subband in the subband that M subband is included by the system bandwidth；
Feedback module, for terminal on PUSCH according to channel condition information described in feedback on reservation Mode Feedback.
10. device according to claim 9, it is characterised in that the feedback module is used on PUSCH according to following anti-
One of feedback mode feeds back following channel condition information：
Broadband channel information, M son take the precoding matrix indicators information i2 of each subband, and M son takes each subband
CQI and the joint RI that takes of M son；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information i2 of each subband, the joint CQI that M son takes
The joint RI taken with M son；Alternatively,
Broadband channel information, the joint precoding matrix indicators information i2 that M son takes, M son take the CQI of each subband
The joint RI taken with M son；Alternatively,
Broadband channel information, the joint precoding matrix indicators information i2 that M son takes, the joint CQI and M that M son takes
Joint RI on height band；Alternatively,
Broadband channel information, the joint precoding matrix indicators information PMI that M son takes, M son take each subband
The joint RI that CQI and M son take；Alternatively,
Broadband channel information, the joint precoding matrix indicators information PMI that M son takes, the joint CQI and M that M son takes
Joint RI on height band；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information PMI of each subband, the joint that M son takes
The joint RI that CQI and M son take；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information PMI of each subband, and M son takes each subband
CQI and the joint RI that takes of M son；The M subband that the feedback module is applied is discontinuous subband；
Wherein, the broadband channel information includes one below and combinations thereof：Broadband CQI, broadband PMI, on the broadband width
Precoding designator i1, precoding designator i2, broadband RI on the broadband width；
Alternatively, the feedback module is used to feed back following channel condition information according to one of following feedback model on PUSCH：
Broadband channel information, M son take the precoding matrix indicators information i2 of each subband, and M son takes each subband
CQI and the joint RI that takes of M son；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information i2 of each subband, the joint CQI that M son takes
The joint RI taken with M son；Alternatively,
Broadband channel information, the joint precoding matrix indicators information i2 that M son takes, M son take the CQI of each subband
The joint RI taken with M son；Alternatively,
Broadband channel information, the joint precoding matrix indicators information i2 that M son takes, the joint CQI and M that M son takes
Joint RI on height band；Alternatively,
Broadband channel information, the joint precoding matrix indicators information PMI that M son takes, M son take each subband
The joint RI that CQI and M son take；Alternatively,
Broadband channel information, the joint precoding matrix indicators information PMI that M son takes, the joint CQI and M that M son takes
Joint RI on height band；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information PMI of each subband, the joint that M son takes
The joint RI that CQI and M son take；Alternatively,
Broadband channel information, M son take the precoding matrix indicators information PMI of each subband, and M son takes each subband
CQI and the joint RI that takes of M son；
The M subband that the feedback module is applied is continuous subband；
The broadband channel information includes one below and combinations thereof：Broadband CQI, broadband PMI, prelisting on the broadband width
Precoding designator i2, broadband RI on code designator i1, the broadband width.
11. a kind of terminal, it is characterised in that the terminal includes information determination module and information feedback module；Wherein,
Described information determining module, feedback method is determined for determining channel condition information, and according to configured information, wherein,
The channel condition information includes：Channel quality indication (CQI) information CQI, precoding matrix indicators information PMI, order designator information
RI；The RI includes the joint RI that M son takes, wherein, M is less than the subband number that system bandwidth is included, and M subband is institute
State preferable subband in the subband that system bandwidth is included；
Described information feedback module, for according to the feedback method, by PUSCH by channel determined by information determination module
Status information is sent to base station.
12. terminal according to claim 11, it is characterised in that described information determining module is used for true according to configured information
The joint RI that fixed width takes with RI and M son；And according to the joint RI that newest broadband RI and M son take determine CQI and
PMI。
13. terminal according to claim 11, it is characterised in that the feedback module is used for broadband RI and M subband
On joint RI, and CQI and PMI information sent to base station.
14. terminal according to claim 13, it is characterised in that
The configured information is the high-rise configuration signal information that base station is sent；
The CQI includes one below and combinations thereof：Each subband in the joint CQI of broadband CQI, M subband and M subband
CQI；
In four-antenna system, the PMI includes one below and combinations thereof：Joint PMI, M of broadband PMI, M subband
Take the PMI of each subband；
In eight antenna systems, the PMI includes one below and combinations thereof：Broadband i1, broadband i2, M subband joint i2,
M son takes the i2 of each subband.
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| WO2012095054A2 (en) * | 2012-03-01 | 2012-07-19 | 华为技术有限公司 | Wireless communication method, user equipment, nodeb, and system |
| CN103391154B (en) * | 2012-05-10 | 2017-10-10 | 中兴通讯股份有限公司 | The feedback method and device of channel condition information |
| CN103516488A (en) * | 2012-06-15 | 2014-01-15 | 电信科学技术研究院 | Channel state information feedback method, terminal and network side device |
| CN103716078B (en) * | 2012-09-29 | 2019-03-12 | 中兴通讯股份有限公司 | A kind of processing method and processing device of channel state information |
| CN104009828B (en) * | 2013-02-26 | 2017-11-17 | 华为技术有限公司 | A kind of channel state information feedback method and equipment |
| CN104468052B (en) * | 2013-09-23 | 2018-08-03 | 联芯科技有限公司 | The selection method of channel quality indication (CQI) information |
| EP3096483B1 (en) | 2014-02-19 | 2019-10-09 | Huawei Technologies Co., Ltd. | Channel state information feedback method and apparatus, user equipment and base station |
| CN105450560B (en) * | 2014-08-14 | 2019-02-12 | 华为技术有限公司 | A kind of method of channel feedback transmission |
| CN110838858B (en) * | 2019-11-08 | 2021-04-06 | 北京紫光展锐通信技术有限公司 | Codebook determination method and device |
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| CN101969363A (en) * | 2010-09-30 | 2011-02-09 | 中兴通讯股份有限公司 | Channel state information feedback method and terminal |
| CN102013956A (en) * | 2010-11-25 | 2011-04-13 | 中兴通讯股份有限公司 | Method and device for feeding back channel state information |
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