CN102025450B - Method for feeding back channel information coding and mobile terminal - Google Patents

Abstract

The invention discloses a method for feeding back channel information coding and a mobile terminal. The method comprises the following steps of: combining a precoder type instruction (PTI) and a rank instruction (RI) into a feedback report by the mobile terminal and setting the PTI before the sequence of RI; coding a linear block code on the feedback report to obtain a code word sequence after coding the feedback report; and feeding back the code word sequence to a base station by the mobile terminal. The invention can improve the performance for feeding back the channel information.

Description

A kind of method and mobile terminal carrying out channel information encoder feedback

Technical field

The present invention relates to wireless communication field, particularly relate to a kind of method and the mobile terminal that carry out channel information encoder feedback.

Background technology

In radio communication, if transmitting terminal and receiving terminal all use many antennas, the mode of spatial reuse can be taked obtain higher speed.Relative to general method for spacial multiplex, a kind of technology of enhancing comprises: receiving terminal feeds back to transmitting terminal channel information, and transmitting terminal uses according to the channel information obtained launches precoding technique to improve transmission performance.Comparatively plain mode carries out precoding for directly using channel characteristics Vector Message, this mode is mainly used in single user multiple-input and multiple-output (Multiple-InputMultiple-Out-put, be called for short MIMO) in, also there is other more excellent but more complicated method, be mainly used in multiuser MIMO.These two kinds of modes all need to know channel information more accurately.

At Long Term Evolution plan (Long Term Evolution, be called for short LTE) in, the feedback of channel information mainly utilizes better simply single code book feedback method, and the performance of the transmitting precoding technique of MIMO depends on the accuracy of wherein code book feedback.

The general principle that channel information based on code book quantizes feedback is briefly described below.

Suppose that Limited Feedback channel capacity is B bps/Hz, so can the number of code word be N=2 ^bindividual.The space of feature vectors of matrix is through quantizing to form code word space CB={w ₁, w ₂..., w _n.This code book (sending and receiving end is identical) is preserved or produced in real time to transmitting terminal and receiving terminal jointly.Receiving terminal selects a code word w mated most with channel according to certain criterion from CB _i, and code word sequence number i is fed back to transmitting terminal.Here, code word sequence number i is called pre-coding matrix instruction (Precoding Matrix Indicator is called for short PMI).Transmitting terminal finds corresponding pre-encoding codeword w according to this sequence number i _i, thus obtain channel information, w _iillustrate the characteristic vector information of channel.

Because the characteristic vector structure of channel matrix H is different, CB further can be divided into code book corresponding to multiple order (layer), and each order corresponding multiple code word can quantize the pre-coding matrix of this order lower channel characteristic vector formation.The characteristic vector number of the corresponding larger characteristic value of sum of ranks channel matrix H of channel is equal, and therefore, code word when in general order is r all can have r to arrange.For LTE Rel.8, code book CB can be divided into 4 sub-codebook CB (1) by the difference of order, CB (2), CB (3), CB (4), as shown in table 1.Each code book has 16 code words.

The code book that table 1LTE Rel.8 divides according to different order

In table 1, to be the code book of r be order

$\mathrm{CB}\left(r\right)=\{w_0^r,w_1^r,...w_{15}^r\}$ Formula 1

Advanced long-term evolution system (the Long Term EvolutionAdvanced of evolution is continued as LTE, be called for short LTE-A) need to support larger system bandwidth (reaching as high as 100MHz), and need the spectrum efficiency improving average spectral efficiency (ase) and Cell Edge User, for this reason, LTE-A needs to strengthen correlation technique, as the transmitting antenna port of MIMO is increased to 8 antennas by 4 antennas.This just needs the code book of design 8 antenna MIMO.The vector space of 8 antenna codebooks of MIMO is more complicated, and permissible accuracy is higher.Like this, 4 antenna codebook feedback quantities during the relative Rel.8 of the feedback quantity of 8 antenna codebooks can increase to some extent.In order under the prerequisite of guarantee 8 antenna MIMO performance, further reduce expense, the design principle giving the MIMO code book of 8 antennas of LTE-A:

1) precoding/feedback arrangement of a subband is made up of two matrixes.As shown in table 2, each order r has two code book CB ₁(r) and CB ₂r (), can be expressed as formula 2 and formula 3.

The two codebook size design of 8 antennas in table 2LTE Rel.10

Order r	CB 1Size	CB 2Size	The size of equivalence code book
				1	16	16	256
2	16	16	256
				3	4	16	64
4	4	8	32
				5	4	1	4
6	4	1	4
				7	4	1	4
8	1	1	1

${\mathrm{CB}}_1\left(r\right)=\{w_1^{r,1},w_2^{r,1},...,w_{N^{r,1}}^{r,1}\}$ Formula 2

${\mathrm{CB}}_2\left(r\right)=\{w_1^{r,2},w_2^{r,2},..,w_{N^{r,2}}^{r,2}\}$ Formula 3

Here, represent code book CB ₁i-th code word matrix of (r), represent code book CB ₂a jth code word matrix of (r).N ^{r, 1}and N ^{r, 2}represent code book CB respectively ₁(r) and code book CB ₂the size of (r).

When subscriber equipment (User Equipment is called for short UE) (referring generally to mobile terminal) feeds back precoding, sequence number i, the j of the code word matrix chosen from two code books feed back as pre-coding matrix instruction PMI1 and PMI2.In the standard of LTE, the minimum feedback unit of channel information is subband (Subband).A subband is by several Resource Block (Resource Block, be called for short RB) composition, the least unit that each RB is running time-frequency resource in LTE by multiple resource element (Resource Element is called for short RE), has continued to use the resource representation method of LTE in LTE-A.Precoding structure refers to the precoding that UE recommends to base station, is in fact also the method for expressing of channel information.

2) structure of this precoding/feedback can be applied to all transmitting antenna array configurations.

3) each matrix in two matrixes is under the jurisdiction of an independent code book.Code book is known by base station and UE simultaneously in advance.Code book can change to some extent on different time and different subbands.

4) a matrix notation broadband or long time channel attribute.On another matrix notation determination frequency band or the in short-term attribute of channel.As shown in table 2, for the order r determined, from code book CB ₁the matrix elected in (r) represent broadband or long time channel attribute, and from code book CB ₂the matrix elected in (r) represent and to determine on frequency band or the attribute of channel in short-term.Like this, each frequency band or the equivalent pre-coding matrix in the short time i, j are PMI1 and PMI2 of UE to base station feedback.Wherein, k=i × j, code book CB under expression order r ₂the size of (r), code book CB under expression order r ₂the size of (r), 1≤r≤8.

5) Rel.8 precoding feedback can be considered as the special shape of this kind of structure, namely the code book of existing Rel.8 can be considered as code book CB ₂, and by CB ₁the number of code book is considered as 1, and namely order is the code book CB under r ₁only there is a unit matrix I _{r × r}, 1≤r≤4.

According to above-mentioned design principle, in the 8 antenna codebook designs of MIMO, need 2 code book CB ₁and CB ₂be placed on UE and base station end simultaneously.At UE after acquisition channel information, from CB ₁and CB ₂middlely choose suitable code word W respectively ₁and W ₂, to base station feedback W ₁and W ₂pMI1 and PMI2 and corresponding order instruction (Rank Indication is called for short RI) information and two CQI information at the most.

Like this, the problem that needs solve is 2 PMI how to be obtained by UE under 8 antenna configuration scenes, 1 RI and 2 CQI information is uploaded to base station under the expense limited.LTE Rel.10 mainly carries out based on Rel.8 existing channel information feed back pattern the solution of this problem.Wherein, the Rel.108 antenna PUCCH 2-1 pattern proposed based on Rel.8PUCCH 2-1 feedback model is that one compares effective method.

Rel.10PUCCH 2-1 pattern by precoder type instruction (Precoder TypeIndication, be called for short PTI), reach can reduce expense again can the object of interval transmission broadband and sub-band information.The report structure body of Rel.10PUCCH 2-1 Mode Feedback information employs following 4 kinds of feedback report: RI+PTI, PMI1, broadband CQI+ broadband P MI2, subband CQI+ subband PMI2 altogether; Namely RI and PTI is an inline conjunction transmission of subframe, and PMI1 is individual transmission in a subframe, and broadband CQI and broadband P MI2 is joint transmission in a subframe, subband CQI and subband PMI2 joint transmission in a subframe.

When scene is 8 antenna configuration, the PUCCH 2-1 of Rel.10 by arrange that PTI indicates base station to know UE current feedback be long time information or short-term information, as shown in table 3.As PTI=0, information when PUCCH 2-1 feeds back long, at this moment comprises following 3 kinds of feedback report: RI+PTI (Report 1), PMI1 (Report 2), broadband CQI+ broadband P MI2 (Report 3).As PTI=1, PUCCH2-1 feeds back short-term information, at this moment comprises following 3 kinds of feedback report: RI+PTI (Report 1), broadband CQI+ broadband P MI2 (Report 2), subband CQI+ subband PMI2 (Report 3).

Show the Feedback Design of PUCCH 2-1 under the antenna configuration of base station 8 in 3LTE Re1.10

When base station be 4 antennas and 2 antenna configuration time, because PMI1 is defined as 1, there is no need to arrange PTI=0.So, when scene be 4 antennas and 2 antenna configuration time, PTI=1.

Due to interchannel noise interference, base station is correct at the PTI obtained, RI mistake time, also there will be problem.Here corresponding analysis is provided.Be fed back to example analysis with PMI1 below, PMI2 feedback there will be identical situation.

The PMI1 of UE feedback is order is r ₁code book CB ₁(r ₁) in certain matrix sequence number, when base station is by order r ₁be mistaken for r ₂time, r here ₁≠ r ₂so base station thinks that PMI1 is order r ₂code book CB ₁(r ₂) in certain matrix sequence number.At this moment following situation may be there is in theory.

1) if now the numerical value of PMI1 is beyond order r ₂code book CB ₁(r ₂) size, then cannot retrieve efficient precoding matrix.

2) if CB ₁(r ₂) and CB ₁(r ₁) in code word matrix dimension not identical, even if the numerical value of PMI1 does not exceed order r ₂code book CB ₁(r ₂) size, can not use from the pre-coding matrix be retrieved.

Such as under 8 × 2 typical scenes (base station configure 8 antennas, UE configure 2 antennas), R1 only has two kinds of option RI=1 or RI=2.But be no matter that RI=1 is mistaken for RI=2 or RI=2 and is mistaken for RI=1, as shown in Table 3, code book CB during RI=1 and RI=2 ₁size be just the same, do not exist RI erroneous judgement after, retrieve according to PMI the situation that corresponding code book can not get code word matrix.

Under 8 × 4 scenes (base station configure 8 antennas, UE configure 4 antennas), RI only has 4 kinds of options RI=1, RI=2, RI=3, RI=4.At this moment, except occurring that RI=1 is mistaken for RI=2 and RI=2 and is mistaken for except the situation of RI=1, also may occur that RI=1 is mistaken for RI=3, RI=3 is mistaken for RI=4 etc. situation.Erroneous judgement situation between RI=1,2 is identical with 8 × 2 scenes previously discussed, and situation is in addition due to CB ₁and CB ₂size under different order may be different, likely can cause according to the result of the PMI retrieval of feeding back less than corresponding codewords matrix.At this moment decoding failure, current feedback channel information cannot use.

The dimension of W1 code word matrix when being 1,2 with RI when RI is 3,4 is different, also can affect the normal use of channel information.

Systematic function can be caused to reduce due to RI mistake or even cannot use the situation of current feedback information, prior art it is generally acknowledged that RI information can be more important than other channel information.Therefore, generally consider RI to be placed on separately in a subframe to carry out transmitting to reduce the error rate at present.If there is having RI and other information (such as the binary sequence of a PMI bit or a PMI1) when the situation of an inline conjunction transmission of subframe, following two kinds of measures can be adopted:

1) expense limiting RI and other information front list entries bit number of namely encoding is less than or equal to 5 bits, this is because when output codons sequence is determined in encoded, before coding, the bit number of list entries is fewer, after coding, the information redundance of sequence is larger, and the ability of opposing psophometer noise interference is stronger.5 bits are the empirical values extensively received.

2) can representing that the binary sequence of RI is placed on before the binary sequence of other information of expression before coding.Because encode, the 1st row of the linear block codes adopted are complete 1 sequences, be in list entries foremost bit information can load in complete 1 sequence, thus better to be protected.

In the design of Rel.10PUCCH 2-1, PTI and RI is formed a feedback report, be placed in a subframe by PTI and RI and carry out coding transmission.When base station adopts 8 antenna configuration, the importance of PTI is greater than the importance of RI.The above-mentioned Article 2 measure that current general technology adopts just is not suitable in Rel.10PUCCH 2-1 the needs PTI and RI being formed feedback report and carry out feeding back.

Summary of the invention

When base station adopts 8 antenna configuration, the indicative function of PTI in PUCCH 2-1 is extremely important.If due to factors such as interchannel noise interference, base station obtains the PTI of mistake to feedback information decoding, then can cause following serious consequence.

1) Report 2 information cannot solve.As shown in Table 3, because the information content of the Report2 of PTI=0 and PTI=1 is completely different with type, then the situation that Report 2 can be caused to solve, this just needs UE to base station retransmission information.

2) subsequent channel information cannot be judged.If the feedback cycle of PTI=0 and PTI=1 is different, PTI judge to make mistakes will cause the feedback sequence that cannot judge next PUCCH 2-1 beginning where, thus can cause channel information next time cannot decoding.

But the error in judgement of RI makes at most this major channel information can not get using, and the decoding error of channel information several times under can not causing most probably as the error in judgement of PTI.And due to the configuration of 8 × 2 are configurations the most common in 8 antenna scenes, the error in judgement of RI can not make this major channel information can not get using.Under another kind of common 8 antenna scenes 8 × 4 configure, the probability that RI=1 and RI=2 occurs is higher than RI=3 and RI=4.So the probability that the situation that the error in judgement of RI makes this major channel information can not get using occurs can not be very high.

The probability that the error in judgement of RI causes this major channel information to can not get using on the one hand is not high, can not get using even if result in this major channel information on the other hand, and the channel information that also can not affect next time uses.And the error in judgement of PTI can cause this secondary channel cannot be used completely on the one hand, if the feedback cycle of PTI=0 with PTI=1 is different, will judge the original position of lower major channel information, thus under causing, channel information several times cannot use equally.

By above-mentioned analysis, a conclusion can be drawn: PTI is more important than RI.Therefore, need to adjust coding strategy to the feedback report comprising PTI and RI in Re-10PUCCH 2-1, be converted into the thinking of laying special stress on protecting PTI by the thinking of laying special stress on protecting RI.

The technical problem to be solved in the present invention is to provide a kind of method and the mobile terminal that carry out channel information encoder feedback, improves the performance of feedback of channel information.

In order to solve the problems of the technologies described above, the invention provides a kind of method of carrying out channel information encoder feedback, comprise: precoder type instruction (PTI) and order instruction (RI) are combined into a feedback report, before PTI being arranged at the sequence representing RI by mobile terminal; Described feedback report is carried out to the coding of linear block codes, obtain the codeword sequence after described feedback report coding; Described codeword sequence is fed back to base station by described mobile terminal.

Further, said method can also have following characteristics:

Described feedback report comprises the binary bit of 1 PTI and the binary sequence of 1 expression RI successively.

Further, said method can also have following characteristics:

When the reception antenna port that described mobile terminal configures is 2, described feedback report comprises the binary sequence that the binary bit of 1 PTI and 1 bit represent RI; When the reception antenna port that described mobile terminal configures is 4, described feedback report comprises the binary sequence of the binary bit of 1 PTI and the expression RI of 2 bits; When the reception antenna port that described mobile terminal configures is 8, described associating sequence to be encoded comprises the binary sequence of the binary bit of 1 PTI and the expression RI of 3 bits.

In order to solve the problems of the technologies described above, present invention also offers a kind of mobile terminal carrying out channel information encoder feedback, described mobile terminal, for precoder type instruction (PTI) and order instruction (RI) are combined into a feedback report, before PTI being arranged at the sequence representing RI; Described feedback report is carried out to the coding of linear block codes, obtain the codeword sequence after described feedback report coding; Described codeword sequence is fed back to base station.

Further, above-mentioned mobile terminal can also have following characteristics:

Described feedback report comprises the binary bit of 1 PTI and the binary sequence of 1 expression RI successively.

Further, above-mentioned mobile terminal can also have following characteristics:

When the reception antenna port that described mobile terminal configures is 2, described feedback report comprises the binary sequence that the binary bit of 1 PTI and 1 bit represent RI; When the reception antenna port that described mobile terminal configures is 4, described feedback report comprises the binary sequence of the binary bit of 1 PTI and the expression RI of 2 bits; When the reception antenna port that described mobile terminal configures is 8, described associating sequence to be encoded comprises the binary sequence of the binary bit of 1 PTI and the expression RI of 3 bits.

The technical problem to be solved in the present invention is to provide a kind of method and the mobile terminal that arrange feedback report, improves the performance of feedback of channel information.

In order to solve the problems of the technologies described above, present invention also offers a kind of method that feedback report is set, comprise: precoder type instruction (PTI) and order instruction (RI) are combined into a feedback report, before PTI being arranged at the binary sequence representing RI by mobile terminal.

Further, said method can also have following characteristics:

Described feedback report comprises the binary bit of 1 PTI and the binary sequence of 1 expression RI successively.

In order to solve the problems of the technologies described above, present invention also offers a kind of mobile terminal that feedback report is set, described mobile terminal, for precoder type instruction (PTI) and order instruction (RI) are combined into a feedback report, before PTI being arranged at the binary sequence representing RI.

Further, above-mentioned mobile terminal can also have following characteristics:

Described feedback report comprises the binary bit of 1 PTI and the binary sequence of 1 expression RI successively.

The present invention can improve the performance of feedback of channel information.

Accompanying drawing explanation

Fig. 1 is the method schematic diagram arranging feedback report in embodiment;

Fig. 2 is the method schematic diagram carrying out feedback report encoder feedback.

Embodiment

When RI and PTI that the present invention is directed to above-mentioned descending MIMO 8 antenna PUCCH 2-1 forms feedback report, PTI is than RI more importantly analysis result, proposes the scheme improving PTI protected degree.

Carry out the mobile terminal of feedback of channel information for precoder type instruction (PTI) and order instruction (RI) are combined into a feedback report, before PTI being arranged at the sequence representing RI; Described feedback report is carried out to the coding of linear block codes, obtain the codeword sequence after described feedback report coding; Described codeword sequence is fed back to base station.

The mobile terminal of feedback report is set for precoder type instruction (PTI) and order instruction (RI) are combined into a feedback report, before PTI being arranged at the binary sequence representing RI.

Described feedback report comprises the binary bit of 1 PTI and the binary sequence of 1 expression RI successively.

When the reception antenna port that described mobile terminal configures is 2, described feedback report comprises the binary sequence that the binary bit of 1 PTI and 1 bit represent RI; When the reception antenna port that described mobile terminal configures is 4, described feedback report comprises the binary sequence of the binary bit of 1 PTI and the expression RI of 2 bits; When the reception antenna port that described mobile terminal configures is 8, described associating sequence to be encoded comprises the binary sequence of the binary bit of 1 PTI and the expression RI of 3 bits.

As shown in Figure 1, the present invention proposes a kind of method arranging feedback report, comprise: precoder type instruction (PTI) and order instruction (RI) are combined into a feedback report, before PTI being arranged at the binary sequence representing RI by mobile terminal.

Wherein, described feedback report comprises the binary bit of 1 PTI and the binary sequence of 1 expression RI successively.

When the reception antenna port that described mobile terminal configures is 2, described feedback report comprises the binary sequence that the binary bit of 1 PTI and 1 bit represent RI; When the reception antenna port that described mobile terminal configures is 4, described feedback report comprises the binary sequence of the binary bit of 1 PTI and the expression RI of 2 bits; When the reception antenna port that described mobile terminal configures is 8, described associating sequence to be encoded comprises the binary sequence of the binary bit of 1 PTI and the expression RI of 3 bits.

As shown in Figure 2, the present invention also proposes a kind of method of carrying out feedback of channel information, comprise: precoder type instruction (PTI) and order instruction (RI) are combined into a feedback report, before PTI being arranged at the sequence representing RI by mobile terminal; Described feedback report is carried out to the coding of linear block codes, obtain the codeword sequence after described feedback report coding; Described codeword sequence is fed back to base station by described mobile terminal.

Wherein, described feedback report comprises the binary bit of 1 PTI and the binary sequence of 1 expression RI successively.

When the reception antenna port that described mobile terminal configures is 2, described feedback report comprises the binary sequence that the binary bit of 1 PTI and 1 bit represent RI; When the reception antenna port that described mobile terminal configures is 4, described feedback report comprises the binary sequence of the binary bit of 1 PTI and the expression RI of 2 bits; When the reception antenna port that described mobile terminal configures is 8, described associating sequence to be encoded comprises the binary sequence of the binary bit of 1 PTI and the expression RI of 3 bits.

The method of carrying out feedback of channel information is described below in detail:

(N, A) linear block codes basic sequence e is prestored in base station end and UE end ₀, e ₁..., e _n-1.E _ithe binary vector of to be length be L, 0≤i≤N-1, N > 8, L > 8.

Step 1:UE, according to high-level signaling instruction or according to existing feedback cycle relation, sets the value p of PTI.

Step 2:UE determines whether to calculate RI according to the value p of PTI, if p=0, measures present channel, calculates RI.If p=1, get the RI of RI as current feedback of last feedback.If p ≠ 0 and p ≠ 1, enter abnormality processing flow process.Herein, the value of RI represents with variable r.

Step 3: calculate the binary sequence a representing PTI and RI respectively ₀and b _k-1, b _k-2..., b ₀.K∈{1，2，3}。Wherein, a ₀∈ { 0,1}; b _i∈ { 0,1}, 0≤i≤K-1; P=a ₀;

Step 4: calculate the feedback report c comprising PTI and RI ₀, c ₁..., c _k.This feedback report is a binary sequence.Here, c ₀=a ₀, c _i=b _k-i, 1≤i≤K.

Step 5: according to following formula to binary sequence c ₀, c ₁..., c _kcarry out coding and obtain d ₀, d ₁..., d _n-1.

$d_j=\underset{i=0}{\overset{K}{\mathrm{\Σ}}}\left(c_i{e}_i\left(j\right)\right)\mathrm{mod}2$

Wherein, e _ithe binary vector of to be length be L.E _ij () represents vector e _ijth+1 element.1≤i≤N，0≤j≤L-1。Xmod2 represents x 2 remainders.Now, A=K+1.

The sequence d that step 6:UE exports after determining that subframe loads coding ₀, d ₁..., d _n-1feed back to base station.

Provide several embodiment of the present invention below.

Specific embodiment one

Known base station configures 8 transmitting antenna ports, and UE holds configuration 2 reception antenna ports.Prestore (20, A) linear block codes basic sequence e in base station end and UE end simultaneously ₀, e ₁..., e ₁₂, as shown in table 4.E _ito be length be 20 binary vector, 0≤i≤12.A is determined by the list entries bit number needing to encode.

The basic sequence (basis sequences) of table 4 (20, A) linear block codes

j	e 0(j)	e 1(j)	e 2(j)	e 3(j)	e 4(j)	e 5(j)	e 6(j)	e 7(j)	e 8(j)	e 9(j)	e 10(j)	e 11(j)	e 12(j)
														0	1	1	0	0	0	0	0	0	0	0	1	1	0
1	1	1	1	0	0	0	0	0	0	1	1	1	0
														2	1	0	0	1	0	0	1	0	1	1	1	1	1
3	1	0	1	1	0	0	0	0	1	0	1	1	1
														4	1	1	1	1	0	0	0	1	0	0	1	1	1
5	1	1	0	0	1	0	1	1	1	0	1	1	1
														6	1	0	1	0	1	0	1	0	1	1	1	1	1
7	1	0	0	1	1	0	0	1	1	0	1	1	1
														8	1	1	0	1	1	0	0	1	0	1	1	1	1
9	1	0	1	1	1	0	1	0	0	1	1	1	1
														10	1	0	1	0	0	1	1	1	0	1	1	1	1
11	1	1	1	0	0	1	1	0	1	0	1	1	1
														12	1	0	0	1	0	1	0	1	1	1	1	1	1
13	1	1	0	1	0	1	0	1	0	1	1	1	1
														14	1	0	0	0	1	1	0	1	0	0	1	0	1
15	1	1	0	0	1	1	1	1	0	1	1	0	1
														16	1	1	1	0	1	1	1	0	0	1	0	1	1
17	1	0	0	1	1	1	0	0	1	0	0	1	1
														18	1	1	0	1	1	1	1	1	0	0	0	0	0
19	1	0	0	0	0	1	1	0	0	0	0	0	0

Step 101:UE is according to high-level signaling instruction or according to existing feedback cycle relation, and the value p=1 of setting PTI, namely determines the content of feedback.

Step 102: because the value p=1 of PTI, according to the form of Rel.10PUCCH 2-1, UE gets the order RI of last feedback as current order RI.Here, the value of RI is represented with variable r.r∈{1，2}。

Step 103: the binary representation sequence b calculating RI ₀.B ₀meet r=b ₀+ 1 and b ₀∈ { 0,1}.

Step 104: the feedback report and the binary sequence 1, b that generate PTI and RI ₀.

Step 105: calculate coded sequence according to following formula.

d _j＝(e ₀(j)+re ₁(j))mod2

Here, e _ito be length be 20 binary vector.E _ij () represents vector e _ijth+1 element.1≤i≤12，0≤j≤19。Xmod2 represents x 2 remainders.Obviously, now A=2.

Step 106:UE is by coded sequence d ₀, d ₁... d ₁₉load, on present frame, issues base station.

Specific embodiment two

Known base station configures 8 transmitting antenna ports, and UE holds configuration 2 reception antenna ports.Prestore (20, A) linear block codes basic sequence e in base station end and UE end simultaneously ₀, e ₁..., e ₁₂, as shown in table 4.E _ito be length be 20 binary vector, 0≤i≤12.A is determined by the list entries bit number needing to encode.

Step 201:UE is according to high-level signaling instruction or according to existing feedback cycle relation, and the value p=0 of setting PTI, namely determines the content of feedback.

Step 202: because the value p=0 of PTI, according to the form of Rel.10PUCCH 2-1, UE measures channel, calculates the RI made new advances.Here, the value of RI is represented with variable r.r∈(1，2}。

Step 203: the binary representation sequence b calculating RI ₀.B ₀meet r=b ₀+ 1 and b ₀∈ { 0,1}.

Step 204: the feedback report and the binary sequence 0, b that generate PTI and RI ₀.

Step 205: calculate coded sequence according to following formula.

d _j＝(e ₀(j)+re ₁(j))mod2

Here, e _ito be length be 20 binary vector.E _ij () represents vector e _ijth+1 element.1≤i≤12，0≤j≤19。Xmod2 represents x 2 remainders.Obviously, now A=2.

Step 206:UE is by coded sequence d ₀, d ₁... d ₁₉load, on present frame, issues base station.

Specific embodiment three

Known base station configures 8 transmitting antenna ports, and UE holds configuration 4 reception antenna ports.Prestore (20, A) linear block codes basic sequence e in base station end and UE end simultaneously ₀, e ₁..., e ₁₂, as shown in table 4.E _ito be length be 20 binary vector, 0≤i≤12.A is determined by the list entries bit number needing to encode.

Step 301:UE is according to high-level signaling instruction or according to existing feedback cycle relation, and the value p=1 of setting PTI, namely determines the content of feedback.

Step 302:UE, according to the value p=1 of PTI, gets the order RI of last feedback as current order RI.Here, represent the value of RI with variable r, r ∈ { 1,2,3,4}.

Step 303: the binary representation sequence b calculating RI ₁, b ₀; b ₁, b ₀meet r=2b ₁+ b ₀+ 1 and b ₀, b ₁∈ { 0,1}.

Step 304: the feedback report and the binary sequence 1, b that generate PTI and RI ₁, b ₀.

Step 305: calculate coded sequence according to following formula.

d _j＝(e ₀(j)+b ₁e ₁(j)+b ₀e ₂(j))mod2

Here, e _ito be length be 20 binary vector.E _ij () represents vector e _ijth+1 element.1≤i≤12，0≤j≤19。X mod2 represents x 2 remainders.Obviously, now A=3.

Step 306:UE is by coded sequence d ₀, d ₁... d ₁₉load, on present frame, issues base station.

Specific embodiment four

Known base station configures 8 transmitting antenna ports, and UE holds configuration 4 reception antenna ports.Prestore (20, A) linear block codes basic sequence e in base station end and UE end simultaneously ₀, e ₁..., e ₁₂, as shown in table 4.E _ito be length be 20 binary vector, 0≤i≤12.A is determined by the list entries bit number needing to encode.

Step 401:UE is according to high-level signaling instruction or according to existing feedback cycle relation, and the value p=0 of setting PTI, namely determines the content of feedback.

Step 402:UE, according to the value p=0 of PTI, measures channel, calculates the channel informations such as RI.Here, represent the value of RI with variable r, r ∈ { 1,2,3,4}.

Step 403: the binary representation sequence b calculating RI ₁, b ₀, b ₁, b ₀meet r=2b ₁+ b ₀+ 1 and b ₀, b ₁∈ { 0,1}.

Step 404: the feedback report and the binary sequence 0, b that generate PTI and RI ₁, b ₀.

Step 405: calculate coded sequence according to following formula.

d _j＝(e ₀(j)+b ₁e ₁(j)+b ₀e ₂(j))mod2

Here, e _ito be length be 20 binary vector.E _ij () represents vector e _ijth+1 element.1≤i≤12，0≤j≤19。Xmod2 represents x 2 remainders.Obviously, now A=3.

Step 406:UE is by coded sequence d ₀, d ₁... d ₁₉load, on present frame, issues base station.

Specific embodiment five

Known base station configures 8 transmitting antenna ports, and UE holds configuration 8 reception antenna ports.Prestore (20, A) linear block codes basic sequence e in base station end and UE end simultaneously ₀, e ₁..., e ₁₂, as shown in table 4.E _ito be length be 20 binary vector, 0≤i≤12.A is determined by the list entries bit number needing to encode.

Step 501:UE is according to high-level signaling instruction or according to existing feedback cycle relation, and the value p=1 of setting PTI, namely determines the content of feedback.

Step 502:UE, according to the value p=1 of PTI, gets the order RI of last feedback as current order RI.Here, represent the value of RI with variable r, r ∈ { 1,2,3,4,5,7,8}.

Step 503: the binary representation sequence b calculating RI ₂, b ₁, b ₀; b ₂, b ₁, b ₀meet r=4b ₂+ 2b ₁+ b ₀+ 1 and b ₀, b ₁, b ₂∈ { 0,1}.

Step 504: the feedback report and the binary sequence 1, b that generate PTI and RI ₂, b ₁, b ₀.

Step 505: calculate coded sequence according to following formula.

d _i＝(e ₀(j)+b ₂e ₁(j)+b ₁e ₂(j)+b ₀e ₃(j))mod2

Here, e _ito be length be 20 binary vector.E _ij () represents vector e _ijth+1 element.1≤i≤12，0≤j≤19。Xmod2 represents x 2 remainders.Obviously, now A=4.

Step 506:UE is by coded sequence d ₀, d ₁... d ₁₉load, on present frame, issues base station.

Specific embodiment six

Known base station configures 8 transmitting antenna ports, and UE holds configuration 8 reception antenna ports.Prestore (20, A) linear block codes basic sequence e in base station end and UE end simultaneously ₀, e ₁..., e ₁₂, as shown in table 4.E _ito be length be 20 binary vector, 0≤i≤12.A is determined by the list entries bit number needing to encode.

Step 601:UE is according to high-level signaling instruction or according to existing feedback cycle relation, and the value p=0 of setting PTI, namely determines the content of feedback.

Step 602:UE, according to the value p=0 of PTI, measures channel, calculates the channel informations such as RI.Here, represent the value of RI with variable r, r ∈ { 1,2,3,4,5,7,8}.

Step 603: the binary sequence b calculating RI ₂, b ₁, b ₀; b ₂, b ₁, b ₀meet r=4b ₂+ 2b ₁+ b ₀+ 1 and b ₀, b ₁, b ₂∈ { 0,1}.

Step 604: the feedback report and the binary sequence 0, b that generate PTI and RI ₂, b ₁, b ₀.

Step 605: calculate coded sequence according to following formula.

d _j＝(e ₀(j)+b ₁e ₁(j)+b ₀e ₂(j)+b ₀e ₃(j))mod2

Here, e _ito be length be 20 binary vector.E _ij () represents vector e _ijth+1 element.1≤i≤12，0≤j≤19。Xmod2 represents x 2 remainders.Obviously, now A=4.

Step 606:UE is by coded sequence d ₀, d ₁... d ₁₉load, on present frame, issues base station.

It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combination in any mutually.

Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art can make various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.

The all or part of step that one of ordinary skill in the art will appreciate that in said method is carried out instruction related hardware by program and is completed, and described program can be stored in computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can use one or more integrated circuit to realize.Correspondingly, each module/unit in above-described embodiment can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.

Claims (10)

1. carry out a method for channel information encoder feedback, it is characterized in that,

Configure the scene of 8 transmitting antenna ports in base station under, precoder type indicates PTI and order instruction RI to be combined into a feedback report, before PTI being arranged at the sequence representing RI by mobile terminal; Described feedback report is carried out to the coding of linear block codes, obtain the codeword sequence after described feedback report coding; Described codeword sequence is fed back to described base station by described mobile terminal.

2. the method for claim 1, is characterized in that,

Described feedback report comprises the binary bit of 1 PTI and the binary sequence of 1 expression RI successively.

3. method as claimed in claim 2, is characterized in that,

The binary sequence of described expression RI is 3 bits.

4. a method for feedback report is set, it is characterized in that,

Configure the scene of 8 transmitting antenna ports in base station under, precoder type indicates PTI and order instruction RI to be combined into a feedback report, before PTI being arranged at the binary sequence representing RI by mobile terminal.

5. method as claimed in claim 4, is characterized in that,

Described feedback report comprises the binary bit of 1 PTI and the binary sequence of 1 expression RI successively.

6. carry out a mobile terminal for channel information encoder feedback, it is characterized in that,

Described mobile terminal, for configure 8 transmitting antenna ports in base station scene under, precoder type indicated PTI and order instruction RI to be combined into a feedback report, before PTI being arranged at the sequence representing RI; Described feedback report is carried out to the coding of linear block codes, obtain the codeword sequence after described feedback report coding; Described codeword sequence is fed back to described base station.

7. mobile terminal as claimed in claim 6, is characterized in that,

Described feedback report comprises the binary bit of 1 PTI and the binary sequence of 1 expression RI successively.

8. mobile terminal as claimed in claim 7, is characterized in that,

The binary sequence of described expression RI is 3 bits.

9. a mobile terminal for feedback report is set, it is characterized in that,

Described mobile terminal, for configure 8 transmitting antenna ports in base station scene under, precoder type indicated PTI and order instruction RI to be combined into a feedback report, before PTI being arranged at the binary sequence representing RI.

10. mobile terminal as claimed in claim 9, is characterized in that,

Described feedback report comprises the binary bit of 1 PTI and the binary sequence of 1 expression RI successively.