CN102244565B - Method and equipment for feeding back channel information as well as method and equipment for generating pre-coding matrix - Google Patents
Method and equipment for feeding back channel information as well as method and equipment for generating pre-coding matrix Download PDFInfo
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- CN102244565B CN102244565B CN201010174341.2A CN201010174341A CN102244565B CN 102244565 B CN102244565 B CN 102244565B CN 201010174341 A CN201010174341 A CN 201010174341A CN 102244565 B CN102244565 B CN 102244565B
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Abstract
The invention discloses a method and equipment for feeding back channel information as well as a method and equipment for generating a pre-coding matrix. The method for feeding back channel information comprises the following steps: a transmitting terminal determines if a rank indication is greater than a RT (Rank Threshold); the transmitting terminal feeds back a PMI (Pre-coding Matrix Indicator)_2 to a receiving terminal when the rank indication is greater than the RT; and the transmitting terminal feeds back the PMI_1 to the receiving terminal when the rank indication is smaller than or equal to the RT, wherein the PMI_1 is broadband/long-term information and the PMI_2 is frequency selectivity/short-term information. According to the invention, the multiplexing with the traditional report information is not needed and the coding rates of the rank indication and other traditional report information are not affected and the report accuracy of the rank indication and other information is not affected; moreover, no additional feedback expenses need to be added.
Description
Technical field
The present invention relates to wireless communication technology, particularly the generation method and apparatus of a kind of feedback of channel information, pre-coding matrix.
Background technology
MIMO (Multiple-Input Multiple-Output, multiple-input, multiple-output) system is used a plurality of transmittings, reception antenna, utilize signal sky, time, frequency-domain combined processing obtains speed, diversity and array gain.In mimo system, if transmitter can be known channel information in some way, just can to transmitted signal, be optimized according to the characteristic of channel, to improve the quality of reception and to reduce the requirement to Receiver Complexity.The general feedback system that adopts quantized channel information in real system, to reduce feedback overhead and feedback delay.
LTE (Long-Term Evolution, Long Term Evolution) eNB (evolvedNodeB in Rel-8/9 (version 8 or 9), evolution base station) can utilize channel reciprocity or UE (User Equipment, subscriber equipment) feedback obtains CSI (the Channel State Information of down channel, channel condition information), wherein several main transmission mode of PDSCH (Physical Downlink Shared Channel, physical down link sharing channel) has all adopted the implicit expression CSI feedback method based on code book.Transmission mode 4, 5, 6, and the PMI of transmission mode 8 (Precoding Matrix Indicator, pre-coding matrix sign) report in pattern UE based on CRS (Cell-specific Reference Signal, the exclusive reference signal in community) measure down channel, and data flow Rank number (the RI:Rank Indication that reports down link to support to eNB according to the reception & disposal algorithm of himself, order index) and the label of pre-coding matrix (PMI), UE also needs to report channel quality (the CQI:Channel Quality Indicator of each code word simultaneously, channel quality indication).Wherein, in the computational process of CQI, UE hypothesis eNB has been used the RI/PMI of its recommendation.
The pre-coding scheme based on code book adopting in LTE Rel-8/9 mainly lays particular emphasis on alone family application scenarios, and Rel-10 (LTE-A:LTE-Advanced, long-term evolution upgrading) in, will further optimize for precoding and feedback mechanism thereof, to support better multi-user scene.According to current discussion result, LTE-A for the basic demand of feedback enhanced scheme is: keeping, under the prerequisite of lower feedback overhead, improving as far as possible CSI feedback accuracy.Under above-mentioned background, substantially determined at present and will in Rel-10, adopt based on dicode feedback scheme originally.In this scheme, channel information be divided into comparatively stable long-term/broadband CSI with there are optionally short-term/frequency selectivity CSI two parts of higher time/frequency, two code books of design, respectively information and frequency selectivity/short-term information during the broadband/length of quantized channel.Based on 2 PMI of two code books feedback, the time/frequency granularity of the feedback that makes 2 PMI based on different, so just can save PMI feedback overhead, thus the performance of raising precoding MIMO system.For simplicity, information when PMI_1 represents broadband/length in application, PMI_2 represents frequency selectivity/short-term information.
In the existing version (Rel-8/9) of LTE, high level can configuration UE adopt PUCCH (PhysicalUplink Control Channel, Physical Uplink Control Channel) carrying out periodicity reports and/or adopts PUSCH (Physical Uplink Shared Channel, physical uplink link sharing channel) to carry out reporting aperiodic.Wherein the reporting information in PUCCH is to choose from 4 kinds of report type (reporting types), and in Rel-8/9, PUCCH can be used the combination of 4 kinds of report type.The PUCCH reporting mode (PUCCH reports pattern) that UE is used also carries out semi-static configuration by high-level signaling.Relation between report type and combination thereof in Rel8/9 (reporting mode) as shown in Table 1.
Table 1: every kind of report type and bit number thereof that PUCCH reporting mode comprises
The existing mechanism that reports designs for single codebook structure, cannot be for this feedback scheme of dicode of Rel-10.At present, Rel-10 feedback scheme just under discussion, does not also have clear and definite scheme.There is company to propose on PUCCH, PMI_1 and RI (Rank Indication, order index) use identical resource, PMI_2 and CQI are used identical resource, the RI that CQI reported based on the last time, PMI_1 and PMI_2 calculate, the feedback cycle of PMI_1 is the integral multiple of RI, and the feedback cycle of RI is the integral multiple of CQI/PMI_2 feedback cycle, does not now feed back CQI/PMI_2 when CQI/PMI_2 and RI or RI/PMI_1 feedback bump.This scheme is called to RI/PMI_1+CQI/PMI_2 scheme.As, when PMI_1 feedback cycle is 1 times of RI feedback cycle, the feedback cycle of RI/PMI_1 is 4 times of CQI/PMI_2 feedback cycle.Fig. 1 is the pattern diagram that reports of RI/PMI_1 and CQI/PMI_2, RI/PMI_1+CQI/PMI_2 scheme report pattern as shown in Figure 1.
The deficiencies in the prior art are:
In RI/PMI_1+CQI/PMI_2 scheme, PMI_1 and RI feed back in same subframe, first need newly to define the reporting types of a kind of PUCCH, also need to introduce one or more new PUCCH reportingmode., larger to the change of existing standard;
Secondly, add the information of PMI_1 in reporting the subframe of RI, as RI needs 3 bits, PMI_1 needs 4 bits, and total number of bits of feedback has increased more than one times, causes PUCCH code rate to be increased to 7/20 by 3/20, now can have a strong impact on the demodulation performance of RI;
Finally, because the information that can carry on PUCCH is limited, can only feed back at present the PMI in broadband, under the feedback model of broadband, the PMI_2 effect of low Rank is little, and feedback PMI_2 takies uplink feedback power resource and can not bring performance gain.
Summary of the invention
Technical problem solved by the invention has been to provide the generation method and apparatus of a kind of feedback of channel information, pre-coding matrix, in order to the scheme of a kind of PMI of feedback to be provided, and according to the scheme of the PMI generating pre-coding matrix of feedback.
A kind of method that feedback of channel information is provided in the embodiment of the present invention, comprises the steps:
Transmitting terminal determines whether RI is greater than RI threshold value R
t;
At RI, be greater than R
ttime, transmitting terminal feeds back PMI_2 to receiving terminal; At RI, be not more than R
ttime, transmitting terminal feeds back PMI_1 to receiving terminal, wherein, information when PMI_1 is broadband/length, PMI_2 is frequency selectivity/short-term information.
A kind of generation method that pre-coding matrix is provided in the embodiment of the present invention, comprises the steps:
Receiving terminal receives PMI_1 or the PMI_2 of transmitting terminal feedback, wherein, information when PMI_1 is broadband/length, PMI_2 is frequency selectivity/short-term information;
Receiving terminal is according to PMI_1 or PMI_2 generating pre-coding matrix.
A kind of transmitter is provided in the embodiment of the present invention, has comprised:
Judge module, for determining whether RI is greater than RI threshold value R
t;
PMI feedback module, for being greater than R at RI
ttime, to receiving terminal feedback PMI_2; At RI, be not more than R
ttime, to receiving terminal feedback PMI_1, wherein, information when PMI_1 is broadband/length, PMI_2 is frequency selectivity/short-term information.
A kind of receiving equipment is provided in the embodiment of the present invention, has comprised:
PMI receiver module, for receiving PMI_1 or the PMI_2 of transmitting terminal feedback, wherein, and information when PMI_1 is broadband/length, PMI_2 is frequency selectivity/short-term information;
Pre-coding matrix module, for according to PMI_1 or PMI_2 generating pre-coding matrix.
Beneficial effect of the present invention is as follows:
In the technical scheme providing in the embodiment of the present invention, at RI, be greater than R
ttime, transmitting terminal feeds back PMI_2 to receiving terminal; At RI, be not more than R
ttime, transmitting terminal feeds back PMI_1 to receiving terminal.During due to difference, feed back PMI_1 and PMI_2, but be greater than R according to RI
tsituation only feed back one of them, therefore do not need to carry out multiplexingly with existing reporting information, can not affect the code rate of RI and other existing reporting informations, the information such as RI are reported to not impact of accuracy; Do not need additionally to increase feedback overhead yet.
Accompanying drawing explanation
Fig. 1 be in background technology RI/PMI_1 and CQI/PMI_2 report pattern diagram;
Fig. 2 is the method implementing procedure schematic diagram of feedback of channel information in the embodiment of the present invention;
Fig. 3 is the generation method implementing procedure schematic diagram of pre-coding matrix in the embodiment of the present invention;
Fig. 4 is feedback scheme schematic diagram under low Rank in the embodiment of the present invention;
Fig. 5 is feedback scheme schematic diagram under high Rank in the embodiment of the present invention;
Fig. 6 is transmitter structural representation in the embodiment of the present invention;
Fig. 7 is receiving equipment structural representation in the embodiment of the present invention.
Embodiment
Inventor notices in invention process: in the situation that supporting low Rank, as Rank1 and Rank2, the correlation of channel is higher, information and frequency selectivity/short-term information two parts in the time of now channel information can being regarded as by broadband/length, so low Rank code book can by two independently code book form, and feed back respectively, PMI_1 and code word combination corresponding to PMI_2 that pre-coding matrix is selected in these two code books form; And in the situation that can supporting high Rank, the correlation of channel is lower, information and frequency selectivity/short-term information two parts while being no longer applicable to channel information to be divided into broadband/length, now in high Rank code book, PMI_1 can be made as unit matrix, and PMI_2 represents the information of channel.
At present, on PUCCH, only support that broadband P MI reports, in adopting above-mentioned code book scheme, under low Rank, only when subband feeds back, the PMI_2 of competence exertion effect works hardly, can not feed back, adopt the mode of fixed value or poll and do not affect systematic function; And PMI_1 is that unit matrix can not feed back completely under high Rank.So in the situation of broadband feedback, only have PMI_1 to work under low Rank in above-mentioned code book scheme, under high Rank, only have PMI_2 to work, on PUCCH, do not need to feed back PMI_1 and PMI_2 simultaneously.
Based on this, in embodiment, will a kind of new feedback scheme be proposed, under low Rank, only feed back PMI_1, under high Rank, only feed back PMI_2, adopt this scheme can reuse reporting types and the pattern of Rel-8, only need to arrange several new Mode State, and need not increase new reporting types and pattern, to existing standard, change less.Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.
Fig. 2 is the method implementing procedure schematic diagram of feedback of channel information, as shown in the figure, during feedback channel information, can comprise the steps:
In enforcement, R
tbe self-defining, in enforcement, it is mainly according to 2 PMI, to feed back applicable scope to determine, does not also come to a conclusion at present, may be to determine according to last 8 antenna codebooks of determining in following agreement, and possible values is 2 or 4.
In enforcement, PMI_1 be stable long-term/broadband CSI, PMI_2 has optionally short-term/frequency selectivity CSI of higher time/frequency;
The cycle that transmitting terminal feeds back RI to receiving terminal is the integral multiple of feedback PMI_1 or PMI_2.Generally, the feedback cycle of RI is the integral multiple of CQI/PMI_1 or CQI/PMI_2 feedback cycle, when RI and CQI/PMI_1 or CQI/PMI_2 feedback bump, does not feed back CQI/PMI_1 or CQI/PMI_2.
In enforcement, transmitting terminal can feed back PMI and CQI by report pattern 1-1 or the 2-1 in LTE version 8 or 9.
Accordingly, in the embodiment of the present invention, also provide with the corresponding receiving terminal of transmitting terminal on execution mode, the also i.e. generation method of the pre-coding matrix on receiving terminal.Describe below.
Fig. 3 is the generation method implementing procedure schematic diagram of pre-coding matrix, as shown in the figure, when generating pre-coding matrix, can comprise the steps:
In enforcement, when receiving terminal receives the PMI_1 of transmitting terminal feedback, receiving terminal can adopt fixing or definite PMI_2 and the PMI_1 generating pre-coding matrix of polling mode.
In enforcement, when receiving terminal receives the PMI_2 of transmitting terminal feedback, receiving terminal can be unit matrix and PMI_2 generating pre-coding matrix by PMI_1;
Or, when receiving terminal receives the PMI_2 of transmitting terminal feedback, using PMI_2 as pre-coding matrix.
In enforcement, receiving terminal receives PMI and the CQI of transmitting terminal feedback by report pattern 1-1 or the 2-1 in LTE version 8 or 9.
In declarative procedure, to from transmitting terminal (as UE) and the enforcement of receiving terminal (as base station), describe respectively, but this does not also mean that the two must coordinate enforcement, in fact, when transmitting terminal and receiving terminal divide while coming into effect, it also solves the problem of transmitting terminal and receiving terminal separately, when just the two is combined with, can obtain better technique effect.Also it should be noted that, in enforcement, also can be using base station as transmitting terminal, and UE is as receiving terminal, there is no difference in enforcement.
Illustrate respectively that RI is greater than R below
tand RI is not more than R
ttime enforcement.
One, RI is not more than R
ttime enforcement.
At RI, be not more than R
ttime, may further include:
In feedback, during PMI_1, feed back in the lump CQI, described CQI is that transmitting terminal adopts fixing or polling mode after determining PMI_2, according to RI, PMI_1, PMI_2, calculates.
Concrete, when high level configuration feedback broadband P MI and CQI, the threshold value of establishing Rank is R
t, as the Rank≤R reporting
ttime, transmitting terminal is according to the broadband P MI_1 selecting and adopt PMI_2 fixing or that polling mode obtains, calculates broadband CQI, then uses and reports pattern 1-1 or 2-1 to report PMI_1 and CQI.
Receiving terminal adopts the PMI_2 that same way as obtains to synthesize pre-coding matrix according to the PMI_1 receiving with transmitting terminal.As, when the feedback cycle of RI is 4 times of CQI/PMI_1 feedback cycle, Fig. 4 is feedback scheme schematic diagram under low Rank, feedback system is as shown in Figure 4.
In concrete enforcement, that transmitting terminal refers to can be UE, and UE determines RI, PMI_1 according to the channel information receiving, CQI to base station feedback, and UE can carry out: (1) determines PMI_1 according to channel information; (2) adopt fixing or polling mode to obtain PMI_2; (3) calculate broadband CQI; (4) use and report pattern 1-1 or 2-1 to report PMI_1 and CQI to the base station as receiving terminal.
When calculating broadband CQI, need RI, PMI_1, PMI_2, in standard, stipulate, RI and PMI, CQI can not report in same subframe, so in reporting the subframe of PMI, CQI, need to adopt the RI reporting last time while calculating CQI.
At RI, be not more than R
ttime, can further include:
On high level configuration subband CQI, give the correct time, the CQI of the selected subband of feedback UE, described CQI is that transmitting terminal adopts fixing or polling mode after determining PMI_2, according to RI, PMI_1, PMI_2, calculates.
Concrete, on high level configuration subband CQI, to give the correct time, the threshold value of establishing Rank is R
t, as the Rank≤R reporting
ttime, transmitting terminal, according to the RI reporting last time and broadband P MI_1, adopts PMI_2 fixing or that polling mode obtains, calculates selected subband CQI, then uses the L that reports pattern 2-1 to report subband CQI and corresponding indication subband positional information.
The behavior that transmitting terminal is carried out mainly comprises: (1) feedback RI; (2) feedback PMI_1, feedback CQI.
What receiving terminal referred to can be base station, and it adopts the PMI_2 that same way as obtains to synthesize pre-coding matrix according to the PMI_1 receiving with transmitting terminal.
Receiving terminal generally does not need to calculate CQI, under special circumstances, under MU (multi-user), is to obtain new CQI according to reporting the CQI obtaining to revise again.
Two, RI is greater than R
ttime enforcement.
At RI, be greater than R
ttime, may further include:
When feedback PMI_2, feed back in the lump CQI, described CQI is that transmitting terminal is unit matrix by PMI_1, according to RI, PMI_1, PMI_2, calculates.
Concrete, as the Rank > R reporting
ttime, PMI_1 can be unit matrix, only needs just can calculate broadband CQI according to a broadband P MI_2 who selects, and then uses and reports pattern 1-1 or 2-1 to report PMI_2 and CQI, receiving terminal PMI_1 is according to a preconcerted arrangement unit matrix, and with its synthetic pre-coding matrix; Or directly using the PMI_2 receiving as pre-coding matrix.As, when the feedback cycle of RI is 4 times of CQI/PMI_2 feedback cycle, Fig. 5 is feedback scheme schematic diagram under high Rank, feedback system is as shown in Figure 5.
At RI, be greater than R
ttime, can further include:
On high level configuration subband CQI, give the correct time, the CQI of the selected subband of feedback UE, described CQI is that transmitting terminal is unit matrix by PMI_1, according to RI, PMI_1, PMI_2, calculates.
Concrete, on high level configuration subband CQI, to give the correct time, the threshold value of establishing Rank is R
t, as the Rank > R reporting
ttime, transmitting terminal, according to the RI reporting last time and broadband P MI_2, is unit matrix by PMI_1, calculates selected subband CQI, then uses the L that reports pattern 2-1 to report subband CQI and corresponding indication subband positional information.
As a possible embodiment, several Mode State and corresponding feedback quantity thereof that while feeding back for 8Tx, PUCCH ReportType2 newly increases in table 2, have been provided.
Table 2: new PUCCH Mode State and corresponding feedback quantity example thereof
Wherein, CQI-1, Δ CQI-2 refers to: when RI > 1, need to feed back 2 CQI, in order to save feedback quantity, in standard, regulation is only fed back CQI-1 and CQI-2 with respect to the deviation delta CQI-2 of CQI-1.
In enforcement, RI=1 and 1 < RI≤R
tprocessing is identical, and just RI=1 need to feed back a CQI, 1 < RI≤R
twhy need to feed back two CQI, be separately because their feedback quantity is different in embodiment table.
Mode 1-1, Mode 2-1 are as broad as long in Report Type 2 (reporting types 2), but in standard, Mode 2-1 also comprises the situation that a kind of UE selects subband to report, i.e. Report Type1 in table 1.
Based on same inventive concept, a kind of transmitter, receiving equipment are also provided in the embodiment of the present invention, because the principle that these equipment are dealt with problems is similar to a kind of a kind of generation method of method of feedback of channel information, pre-coding matrix, therefore the enforcement of these equipment can, referring to the enforcement of method, repeat part and repeat no more.
Fig. 6 is transmitter structural representation, as shown in the figure, in transmitter, can comprise:
In enforcement, PMI feedback module can also be further used for being not more than R at RI
t, in feedback, during PMI_1, feeding back in the lump CQI, described CQI is that transmitting terminal adopts fixing or polling mode after determining PMI_2, according to RI, PMI_1, PMI_2, calculates.
In enforcement, PMI feedback module can also be further used for being greater than R at RI
t, when feedback PMI_2, feeding back in the lump CQI, described CQI is that transmitting terminal is unit matrix by PMI_1, according to RI, PMI_1, PMI_2, calculates.
In enforcement, PMI feedback module can also be further used for feeding back PMI and CQI by report pattern 1-1 or 2-1 in LTE version 8 or 9.
Fig. 7 is receiving equipment structural representation, as shown in the figure, in receiving equipment, can comprise:
In enforcement, pre-coding matrix module can also be further used for, when receiving the PMI_1 of transmitting terminal feedback, adopting fixing or definite PMI_2 and the PMI_1 generating pre-coding matrix of polling mode.
In enforcement, pre-coding matrix module can also be further used for when receiving the PMI_2 of transmitting terminal feedback, is unit matrix, with PMI_2 generating pre-coding matrix by PMI_1; Or, when receiving the PMI_2 of transmitting terminal feedback, using PMI_2 as pre-coding matrix.
In enforcement, PMI receiver module can also be further used for receiving PMI and the CQI of transmitting terminal feedback by report pattern 1-1 or 2-1 in LTE version 8 or 9.
For convenience of description, the each several part of the above device is divided into various modules with function or unit is described respectively.Certainly, when enforcement is of the present invention, the function of each module or unit can be realized in same or a plurality of software or hardware.
In technical scheme provided by the invention, at RI≤R
ttime only feed back PMI_1; At RI > R
ttime only feed back PMI_2.
Further, at RI≤R
ttime, can adopt PMI_2 fixing or that polling mode obtains
The technical scheme that the embodiment of the present invention provides does not need to carry out multiplexingly with existing reporting information, can not affect the code rate of RI and other existing reporting informations, therefore the information such as RI is reported to not impact of accuracy; Due to this programme, continue to use report type and the Reporting Modes of Rel-8 simultaneously, do not need additionally to increase feedback overhead.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, implement software example or in conjunction with the form of the embodiment of software and hardware aspect completely.And the present invention can adopt the form that wherein includes the upper computer program of implementing of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code one or more.
The present invention is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present invention, equipment (system) and computer program.Should understand can be in computer program instructions realization flow figure and/or block diagram each flow process and/or the flow process in square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, the instruction of carrying out by the processor of computer or other programmable data processing device is produced for realizing the device in the function of flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame on computer or other programmable devices.
Although described the preferred embodiments of the present invention, once those skilled in the art obtain the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (14)
1. a method for feedback of channel information, is characterized in that, comprises the steps:
Transmitting terminal determines whether order index RI is greater than RI threshold value R
t;
At RI, be greater than R
ttime, transmitting terminal identifies PMI_2 to receiving terminal feeding back precoding matrix on PUCCH; At RI, be not more than R
ttime, transmitting terminal feeds back PMI_1 to receiving terminal on PUCCH, wherein, information when PMI_1 is broadband/length, PMI_2 is frequency selectivity/short-term information.
2. the method for claim 1, is characterized in that, at RI, is not more than R
ttime, further comprise:
In feedback during PMI_1, feedback channel quality indication CQI in the lump, described CQI is that transmitting terminal adopts fixing or polling mode after determining PMI_2, according to RI, PMI_1, PMI_2, calculates.
3. the method for claim 1, is characterized in that, at RI, is greater than R
ttime, further comprise:
When feedback PMI_2, feed back in the lump CQI, described CQI is that transmitting terminal is unit matrix by PMI_1, according to RI, PMI_1, PMI_2, calculates.
4. method as claimed in claim 2 or claim 3, is characterized in that, transmitting terminal is by reporting pattern 1-1 or 2-1 feedback PMI and CQI in Long Term Evolution LTE version 8 or 9.
5. a generation method for pre-coding matrix, is characterized in that, comprises the steps:
Receiving terminal receives PMI_1 or the PMI_2 of transmitting terminal feedback on PUCCH, wherein, information when PMI_1 is broadband/length, PMI_2 is frequency selectivity/short-term information;
When receiving terminal receives the PMI_1 of transmitting terminal feedback, according to adopting fixing or definite PMI_2 and the PMI_1 generating pre-coding matrix of polling mode.
6. method as claimed in claim 5, is characterized in that, when receiving terminal receives the PMI_2 of transmitting terminal feedback, is unit matrix, with PMI_2 generating pre-coding matrix by PMI_1;
Or, when receiving terminal receives the PMI_2 of transmitting terminal feedback, using PMI_2 as pre-coding matrix.
7. the method as described in claim 5 or 6, is characterized in that, receiving terminal receives PMI and the CQI of transmitting terminal feedback by report pattern 1-1 or the 2-1 in LTE version 8 or 9.
8. a transmitter, is characterized in that, comprising:
Judge module, for determining whether RI is greater than RI threshold value R
t;
PMI feedback module, for being greater than R at RI
ttime, on PUCCH, to receiving terminal, feed back PMI_2; At RI, be not more than R
ttime, on PUCCH, to receiving terminal, feed back PMI_1, wherein, information when PMI_1 is broadband/length, PMI_2 is frequency selectivity/short-term information.
9. equipment as claimed in claim 8, is characterized in that, PMI feedback module is further used for being not more than R at RI
t, in feedback, during PMI_1, feeding back in the lump CQI, described CQI is that transmitting terminal adopts fixing or polling mode after determining PMI_2, according to RI, PMI_1, PMI_2, calculates.
10. equipment as claimed in claim 8, is characterized in that, PMI feedback module is further used for being greater than R at RI
t, when feedback PMI_2, feeding back in the lump CQI, described CQI is that transmitting terminal is unit matrix by PMI_1, according to RI, PMI_1, PMI_2, calculates.
11. equipment as described in claim 9 or 10, is characterized in that, PMI feedback module is further used for by reporting pattern 1-1 or 2-1 feedback PMI and CQI in LTE version 8 or 9.
12. 1 kinds of receiving equipments, is characterized in that, comprising:
PMI receiver module, for receive PMI_1 or the PMI_2 of transmitting terminal feedback on PUCCH, wherein, and information when PMI_1 is broadband/length, PMI_2 is frequency selectivity/short-term information;
Pre-coding matrix module, for when receiving the PMI_1 of transmitting terminal feedback, according to adopting fixing or definite PMI_2 and the PMI_1 generating pre-coding matrix of polling mode.
13. equipment as claimed in claim 12, is characterized in that, pre-coding matrix module is further used for when receiving the PMI_2 of transmitting terminal feedback, is unit matrix, with PMI_2 generating pre-coding matrix by PMI_1; Or, when receiving the PMI_2 of transmitting terminal feedback, using PMI_2 as pre-coding matrix.
14. equipment as described in claim 12 or 13, is characterized in that, PMI receiver module is further used for receiving PMI and the CQI of transmitting terminal feedback by report pattern 1-1 or 2-1 in LTE version 8 or 9.
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