CN107222248A

CN107222248A - Channel quality indicates to determine method and device, communication equipment

Info

Publication number: CN107222248A
Application number: CN201610154808.4A
Authority: CN
Inventors: 易立强
Original assignee: Shenzhen ZTE Microelectronics Technology Co Ltd
Current assignee: Sanechips Technology Co Ltd; Shenzhen ZTE Microelectronics Technology Co Ltd
Priority date: 2016-03-17
Filing date: 2016-03-17
Publication date: 2017-09-29
Anticipated expiration: 2036-03-17
Also published as: WO2017157066A1; CN107222248B

Abstract

Method and device, communication equipment are determined the embodiment of the invention discloses a kind of channel quality indicator (CQI), methods described includes：Channel matrix and pre-coding matrix according to being received determine equivalent channel matrix；Noise mean square deviation normalized is carried out to the equivalent channel matrix according to the noise mean square deviation of the channel received；ORTHOGONAL TRIANGULAR DECOMPOSITION is carried out to the equivalent channel matrix after normalization, it is determined that the upper triangular matrix after decomposing；Piecemeal processing is carried out according to main diagonal element and non-master diagonal element to the upper triangular matrix, the mutual information MI values of each layer are determined；The average MI values of code word are calculated according to the MI values of layer, the average MI values based on the code word determine the CQI value of the code word.

Description

Channel quality indicates to determine method and device, communication equipment

Technical field

The present invention relates to mobile communication technology, (CQI, Channel are indicated more particularly, to a kind of channel quality Quality Indicator) determine method and device, communication equipment.

Background technology

Multiinputoutput (MIMO, Multiple-Input Multiple-Output) technology is Current wireless communication Improve the main method of spectrum efficiency.At present, 802.11n/ac, Long Term Evolution (LTE, Long Term Evolution)/senior long term evolution (LTE-A, Long Term Evolution-Advanced) system etc. is new Generation high throughput wireless communication protocol uses the technology.Space division multiplexing is then one kind of MIMO technology Important form, its basic thought is that multi-antenna channel is decomposed into multiple independent parallel subchannels, is passed through Different data flows are sent in these subchannels and improve transmission rate.However, the wireless communication of actual signal transmission Road changes at random, with frequency selectivity and time-varying characteristics.Would generally be using adaptive in communication system Modulation and coding (AMC, Adaptive Modulation and Coding) technology, it is according to channel Shi Zhiliang, the modulation system and code rate of dynamic adjustment transmission of radio links, to improve transmission rate and be The handling capacity of system.Specifically, implement AMC this system channel condition of the receiver based on signal, The factors etc. such as interference estimate that channel quality indicates (CQI, Channel Quality Indicator), then will Emitter of the estimated CQI feedback into system, so as to emitter can with or select suitable modulating-coding Scheme, BLER(block error rate) (BLER, Block Error Rate) is expected so that being obtained at receiver.In this way, Accurately and suitably selected for MCS and for obtaining desired BLER to improve system spectrum utilization rate, The CQI degree of accuracy is extremely important.

It is usually used in determining CQI equivalent SNR mappings (EESM, the Exponential of method such as index at present Effective SNR Metric) and equivalent SNR mappings (MIESM, the Mutual Information of mutual information Effective SNR Metric) etc., although these determinations CQI method can be used in linearity test, such as most Small mean square error (MMSE, Minimum Mean Square Error) detection, it is by being post-processed Signal to noise ratio (SNR, Signal Noise Ratio) calculates equivalent SNR, so that it is determined that CQI.If but above-mentioned Determining CQI method is used for non-linear detection, due to the post processing SNR for being difficult to accurately obtain non-linear detection, Then determine that precision is poor during CQI, it is impossible to obtain the Potential performance gain that non-linear detection is brought completely.

The content of the invention

In order to solve the above technical problems, the embodiments of the invention provide a kind of channel quality indicate determination method and Device, communication equipment.

A kind of channel quality indicator (CQI) provided in an embodiment of the present invention determines method, and methods described includes：

Channel matrix and pre-coding matrix according to being received determine equivalent channel matrix；

Noise mean square deviation normalizing is carried out to the equivalent channel matrix according to the noise mean square deviation of the channel received Change is handled；

ORTHOGONAL TRIANGULAR DECOMPOSITION is carried out to the equivalent channel matrix after normalization, it is determined that the upper triangular matrix after decomposing；

Piecemeal processing is carried out according to main diagonal element and non-master diagonal element to the upper triangular matrix, determined The mutual information MI values of each layer；

The average MI values of code word are calculated according to the MI values of layer, the average MI values based on the code word determine institute State the CQI value of code word.

In the embodiment of the present invention, the average MI values based on the code word determine the CQI value of the code word, Including：

By the average MI values of code word MI values threshold value difference corresponding with CQI under default each modulation system It is compared, maximum CQI value is used as the code in the MI values threshold value correspondence CQI value for the condition that meets The CQI value of word.

Obtained according to the mapping relations between MI values and signal to noise ratio snr the code word average MI values etc. Imitate SNR；

According to the equivalent SNR and selected modulation system, default CQI and SNR threshold values are searched Between corresponding relation, and find out the corresponding maximum CQI value of the SNR threshold values of the condition of satisfaction, will The maximum CQI value as the code word CQI value.

In the embodiment of the present invention, the mutual information MI values for determining each layer, including：

Modulus processing is carried out to the element of the upper triangular matrix, obtainedMatrix；

It is rightMatrix carries out piecemeal, and obtains the elements in a main diagonal；Search performance is related in default corresponding table The elements in a main diagonal combination index andThe non-master diagonal element value of matrix；

FoundationThe index of the elements in a main diagonal combination of matrix, which is preset in corresponding table, searches corresponding MI values group, WillNon-master diagonal element as interpolation element, MI values group is carried out multi-dimensional interpolation determine it is performance-relevant The elements in a main diagonal of matrix combines corresponding MI values；

WillThe main diagonal element of matrix is as interpolation element, according to obtained performance-relevant leading diagonal member The corresponding MI values of element combination determine every layer of MI values of the upper triangular matrix.

In the embodiment of the present invention, the average MI values that code word is calculated according to the MI values of layer, including：

Layer order recovery according to ORTHOGONAL TRIANGULAR DECOMPOSITION is arrived to the layer order of the channel matrix received according to layer The demapping of code word obtains the MI values of correspondence code word；

If MI_j(k) the average MI of the code word j that received channel matrix is obtained MI values, then code word is represented Value MI_jDetermined according to following formula：

Wherein, K is subcarrier number in bandwidth.

In the embodiment of the present invention, the default corresponding table includesMapping table between matrix and layer MI.

In the embodiment of the present invention, the element to the upper triangular matrix carries out modulus processing, including：

Modulus processing is carried out to the non-master diagonal element of the upper triangular matrix.

A kind of channel quality indicator (CQI) determining device, including：First determining unit, normalized unit, Resolving cell, piecemeal processing unit and the second determining unit, wherein：

First determining unit, for determining equivalent channel square according to the channel matrix and pre-coding matrix that are received Battle array；

Normalized unit, for the noise mean square deviation according to the channel received to the equivalent channel square Battle array carries out noise mean square deviation normalized；

Resolving cell, for carrying out ORTHOGONAL TRIANGULAR DECOMPOSITION to the equivalent channel matrix after normalization, it is determined that decomposing Upper triangular matrix afterwards；

Piecemeal processing unit, for entering to the upper triangular matrix according to main diagonal element and non-master diagonal element The processing of row piecemeal, determines the mutual information MI values of each layer；

Second determining unit, the average MI values for calculating code word according to the MI values of layer, based on the code word Average MI values determine the CQI value of the code word.

In the embodiment of the present invention, second determining unit is additionally operable to the average MI values of code word with presetting Each modulation system under the corresponding MI values threshold values of CQI be compared respectively, in the MI values for the condition that meets Threshold value corresponds to CQI value maximum in CQI value as the CQI value of the code word.

In the embodiment of the present invention, second determining unit, be additionally operable to according to MI values and signal to noise ratio snr it Between mapping relations obtain the code word average MI values equivalent SNR；According to the equivalent SNR and institute The modulation system of selection, searches the corresponding relation between default CQI and SNR threshold values, and find out The corresponding maximum CQI value of SNR threshold values of condition is met, the maximum CQI value is regard as the code The CQI value of word.

In the embodiment of the present invention, the piecemeal processing unit is additionally operable to enter the element of the upper triangular matrix The processing of row modulus, is obtainedMatrix；

In the embodiment of the present invention, the second determining unit is additionally operable to the layer order recovery according to ORTHOGONAL TRIANGULAR DECOMPOSITION To the layer order of the channel matrix received, the MI values of correspondence code word are obtained according to the demapping of layer to code word；

Wherein, K is subcarrier number in bandwidth.

A kind of communication equipment, the communication equipment includes described CQI determining devices.

In the technical scheme of the embodiment of the present invention, determined according to the channel matrix and pre-coding matrix received etc. Imitate channel matrix；Noise is carried out to the equivalent channel matrix according to the noise mean square deviation of the channel received equal Normalized square mean processing；ORTHOGONAL TRIANGULAR DECOMPOSITION is carried out to the equivalent channel matrix after normalization, it is determined that after decomposing Upper triangular matrix；The upper triangular matrix is carried out at piecemeal according to main diagonal element and non-master diagonal element Reason, determines the mutual information MI values of each layer；The average MI values of code word are calculated according to the MI values of layer, are based on The average MI values of the code word determine the CQI value of the code word.The technical scheme of the embodiment of the present invention is used The upper triangular matrix element modulus matrix and layer MI value mapping tables, energy of advance simulation building modulation mode combination Non-linear detection performance directly is equivalent to, the accurate purpose for calculating CQI is reached, so as to improve system spectrum Utilization rate.Using piecemeal processing method computation of table lookup layer MI, it is adaptable to the non-linear detection of different types, Also reduce simultaneously and table look-up and handle complexity.

Brief description of the drawings

Fig. 1 determines the schematic diagram of principle for CQI in the mimo system of the embodiment of the present invention；

Fig. 2 determines the flow chart of method for the CQI of the embodiment of the present invention；

Fig. 3 is the schematic flow sheet that layer MI values are determined based on method of partition of the embodiment of the present invention；

Fig. 4 is the schematic flow sheet that CQI is determined by comparing MI value thresholdings of the embodiment of the present invention；

Fig. 5 is another schematic flow sheet that CQI is determined by comparing SNR value thresholding of the embodiment of the present invention；

Fig. 6 is the structure composition schematic diagram of the CQI determining devices of the embodiment of the present invention.

Embodiment

The characteristics of in order to more fully hereinafter understand the embodiment of the present invention and technology contents, below in conjunction with the accompanying drawings Realization to the embodiment of the present invention is described in detail, appended accompanying drawing purposes of discussion only for reference, is not used for Limit the embodiment of the present invention.

For by M_TIndividual transmitting antenna and M_RThe space division multiplexing mimo system of individual reception antenna composition, is received To signal y determined by following formula：

Y=Hs+N

Wherein,For transmission signal vector, each element includes Ω bits, s in s_i=θ, θ is constellation point set；For received signal vector；H is M_R×M_TTie up channel matrix；It is white complex gaussian noise vector, variance is σ²。

As shown in figure 1, in OFDM-MIMO reception systems, the wireless signal of space propagation passes through OFDM Reception processing, log-likelihood ratio (LLR, Log-Likelihood Ratio) is exported by the detection of detector, Then work decoding is completed by decoder.And channel condition information (CSI, Channel State Information) The channel matrix H and noise variance σ then obtained by estimation²Computing is obtained.Receiving terminal is anti-according to channel condition The parameter of channel condition information (CSI) is presented, it is order instruction (RI, Rank Indication), precoding square Battle array indicates that (PMI, Precoding Matrix Indicator) and channel quality indicate the finite aggregate of (CQI) Close.CQI generally defines modulation system, bit rate and the efficiency of each CQI indexes.Receiving terminal needs foundation Current channel condition reports highest CQI.Highest CQI corresponds to estimated reception downlink transmission The BLER of block be not above the modulation of defined percentage (such as 10%) and coding strategy (MCS, Modulation and Coding Scheme)。

In feedback CSI is calculated, CQI determination depend on currently transmitted pattern and for present channel most Good RI and PMI selection.The CQI grades of feedback directly reflect receptivity under conditions present, and it is with connecing Detector selected by receipts machine is closely related.For space division multiplexing then select linearity test, such as MMSE, after The equivalent SINR of processing can use channel estimation parameter clearly to calculate, but performance is not so good as non-linear detection It is superior.Non-linear detection, such as spherical detection (SD, Sphere Decoder), is resulted in performance The performance detected close to maximal possibility estimation (ML, Maximum Likelihood), so as to obtain extensively should With.But due to the non-linear relation of detection, it is difficult to directly obtain its equivalent performance, in addition in order to reduce detection Search complexity, has also carried out some approximate and simplified processing, so making CQI calculating then becomes in computing More there is challenge.

Fig. 2 determines the flow chart of method for the CQI of the embodiment of the present invention, as shown in Fig. 2 the present invention is implemented The CQI of example determines that method comprises the following steps：

Step 201, equivalent channel matrix is obtained by optimal pre-coding matrix.

Specifically, if representing to receive obtained channel matrix, the optimal precoding square that W obtains for expression with H Battle array, then equivalent channel matrix H_e(k) it is：

H_e(k)=H (k) W (k)

Wherein, k is subcarrier index on correspondence symbol.Especially, transmitting terminal MIMO space division multiplexings are used Big delay CDD (Cyclic Delay Diversity) form, W (k) is then selected according to fixed rule.

Step 202, noise mean square deviation normalized is carried out to equivalent channel matrix.

If the noise mean square deviation for representing to estimate to obtain with σ, normalized is：

Wherein,It is the equivalent channel matrix after normalization, noise mean square deviation can be calculated by preposition module, The noise mean square deviation is directly obtained when the embodiment of the present invention is used.

Step 203, asked according to identical ORTHOGONAL TRIANGULAR DECOMPOSITION (QR) method in space division multiplexing non-linear detection R matrixes are obtained, concrete mode is as follows：

Wherein, Q (k) is orthogonal matrix, and R (k) is upper triangular matrix.

In non-linear detection, SD methods are generally used, channel matrix can be carried out QR decomposition and carried out by it Trigonometric ratio, so that suitable for tree search algorithm.The SD methods of use are different, and QR decomposition methods also understand some It is different.In order to reach preferable performance, QR decomposition methods can be decomposed to classical QR and are adjusted, adjustment inspection Layer order is surveyed, such as FSD (Fixed-complexity Sphere Detection) is then using sequence QR methods. Here the QR decomposition methods implemented, are decomposed corresponding to the QR used in current space division multiplexing non-linear detection Method, has so also just reached method and the actual uniformity for receiving non-linear detection that CQI is used in determining. Adjusted because the QR of use decomposes to decompose classical QR, the rule of triangular matrix (R matrixes) Rule property is broken, and directly mapping MI by R matrixes tables look-up and handle, and encounters difficulty.

Step 204, piecemeal processing is carried out according to main diagonal element and non-master diagonal element by R matrixes, asked for Mutual information (MI, Mutual information) value of layer.

The code word modulation mode combination that this step may be used according to transmitting terminal is carried out respectively, and modulation system can be with It is QPSK, 16QAM, any of 64QAM and 256QAM, but not limited to this.For simplification Processing, can generally select code word to use identical modulator approach, such as two code word modulation mode combinations 64QAM-64QAM, but it is also possible to use different modulation systems between use code word.

Fig. 3 is the schematic flow sheet that layer MI values are determined based on method of partition of the embodiment of the present invention, such as Fig. 3 Shown, the piecemeal processing method of the embodiment of the present invention specifically includes following steps：

Step 301, R matrixes under identical QR decomposition methods are asked in space division multiplexing non-linear detection

Step 302, modulus value processing is carried out to obtained R matrix elements.Concrete mode is as follows：

Wherein, R_ij(k) the i-th row jth column element of R (k) matrix is represented respectively.It is, in general, that QR is decomposed into Ensure the uniqueness decomposed, main diagonal element is arithmetic number, so modulus computing can be only in non-leading diagonal member Carried out on element.Influence of the element to non-linear detection performance comes approximately through its modulus value on R matrix off-diagonals Weigh.Modulus computing can greatly reduce the dimension of R matrixes, simplify mapping table size and lookup method, And ask for the complexity of MI computings.

Step 303, byThe elements in a main diagonal that the partitioning of matrix is obtained, it is related that it combines determination performance of tabling look-up The elements in a main diagonal combination index and non-master diagonal element value.Performance-relevant master couple mentioned here Diagonal element combined index can be one, it is also possible to multiple.

R element modulus matrix and layer MI mapping tables are divided into two parts under modulation system, diagonal based on a part The index and non-master diagonal element value table of line element combination, by taking 4 reception antenna, 3 layers of MIMO as an example, such as Shown in table 1；Another part is that the index that the elements in a main diagonal is combined combines corresponding with non-master diagonal element MI value tables, by taking 4 reception antenna, 3 layers of MIMO as an example, as shown in table 2.

Table 1

Table 2

Here table look-up utilization is table 1, is combined with main diagonal elementExemplified by, it is related to its performance The elements in a main diagonal combination index be probably i and j, non-master diagonal element value can determine that by i and j.

Matrix element value is different with modulation mode combination difference, and usually, order of modulation is higher, Span is bigger.

Step 304,Non-master diagonal element is looked into as interpolation element according to the index that the elements in a main diagonal is combined The corresponding MI values group of table carries out multi-dimensional interpolation and determines that performance-relevant the elements in a main diagonal combines corresponding MI.

MI values group described here is that the index combined in the elements in a main diagonal is determined, to non-master diagonal element Value extracts the vectorial corresponding MI value sets of composition, and MI values can be represented using following formula in set：

MI=f (i, x, y, z)

Wherein,To extract function, x, y, z represents correspondence respectivelyMatrix non-master diagonal element value decimation value, F () is under leading diagonal index i, by x, y, z composition of vector to MI value mapping functions.The elements in a main diagonal Index with MI groups form by setting eligible R matrix elements value and code word modulation mode combination in advance, Statistics determination is largely emulated using true link to obtain.So, also with regard to that can reach that high accuracy reflection is real non- Linear receptivity.The multi-dimensional interpolation of use can be linear interpolation or other kinds of interpolation side Method.

Step 305,Main diagonal element is as interpolation element according to obtained performance-relevant leading diagonal member The corresponding MI values of element combination determine R every layer of MI value of matrix.

Below continuing on Fig. 2 handling process.

Step 205, the average MI values of code word are calculated.

The adjustment detection layers order recovery decomposed according to QR to primary reception channel matrix H layer sequentially, then Layer tries to achieve the MI values of correspondence code word to the demapping of code word.If MI_j(k) the code word j that correspondence H (k) is obtained is represented MI values, for ofdm system, in addition it is also necessary to the subcarrier that will be calculated in CQI feedback correspondence bandwidth MI values are averaging processing.

Wherein K is that subcarrier number is calculated in bandwidth.

Step 206, compared by thresholding and determine optimal CQI.

The MI of code word MI values threshold values corresponding with CQI under the different modulating mode pre-set are compared, Selection meets maximum CQI value in condition and finally reports value as the code word.

Wherein, Θ is code word modulation system set, and α is the modulation system selected in gathering；It is modulation methods Formula is the code word j tried to achieve under α MI values, T^αFor the corresponding thresholding of difference CQI grades under modulation system α Value.Threshold value can be by pre-setting the corresponding modulation system code check of CQI grades and expecting the parameters such as BLER Obtained by link performance emulation.

Fig. 4 is the schematic flow sheet that CQI is determined by comparing MI value thresholdings of the embodiment of the present invention, is such as schemed Shown in 4, it includes：Equivalent channel matrix is calculated, and is transported by the channel matrix obtained and optimal pre-coding matrix Obtain；Channel is normalized, and equivalent channel matrix is normalized using the noise mean square deviation of acquisition； R matrixes are asked for during QR is decomposed, and the normalization matrix obtained to preposition module implements non-linear detection phase Tongfang The QR of method, which is decomposed, obtains R matrixes；Piecemeal processing method calculates MI values, and R matrixes carry out leading diagonal member Element and the processing of non-master diagonal element piecemeal, by searching R element modulus matrix and layer under modulation mode combination MI values mapping table and multi-dimensional interpolation calculate MI values；The average MI of demapping computation code word, here demapping bag The demapping between respective layer adjustment order demapping and layer and code word is decomposed containing QR, by the MI of same code word Value cumulative mean obtains the MI values of respective layer；Optimal CQI is determined, by the MI of code word and is pre-set CQI correspondences MI value threshold values under different modulating mode, selection meets in condition maximum CQI value as the code Word finally reports value.The flow that abovementioned steps can refer to shown in Fig. 2 understands.

Fig. 5 is another schematic flow sheet that CQI is determined by comparing SNR value thresholding of the embodiment of the present invention, Fig. 5 compared to Fig. 4 be compared determine CQI use measurement on it is otherwise varied.Code word is being obtained in Fig. 5 MI values after, obtain equivalent SNR by MI values and SNR mapping relations, by correspondence code word equivalent SNR, Only processing one of which modulation system, such as most high-order modulating, then the CQI by pre-setting may be selected Corresponding equivalent SNR value threshold value determines the code word optimal CQI value.

Fig. 6 is the structure composition schematic diagram of the CQI determining devices of the embodiment of the present invention, as shown in fig. 6, this The CQI determining devices of inventive embodiments include：First determining unit 60, normalized unit 61, point Unit 62, the determining unit 64 of piecemeal processing unit 63 and second are solved, wherein：

First determining unit 60, for determining equivalent channel according to the channel matrix and pre-coding matrix that are received Matrix；

Normalized unit 61, for according to the noise mean square deviation of the channel received to the equivalent channel Matrix carries out noise mean square deviation normalized；

Resolving cell 62, for carrying out ORTHOGONAL TRIANGULAR DECOMPOSITION to the equivalent channel matrix after normalization, it is determined that point Upper triangular matrix after solution；

Piecemeal processing unit 63, for the upper triangular matrix according to main diagonal element and non-master diagonal element Piecemeal processing is carried out, the mutual information MI values of each layer are determined；

Second determining unit 64, the average MI values for calculating code word according to the MI values of layer, based on described The average MI values of code word determine the CQI value of the code word.

As a kind of implementation, second determining unit 64, be additionally operable to by the average MI values of code word with The corresponding MI values threshold values of CQI are compared respectively under default each modulation system, are meeting the MI of condition It is worth CQI value maximum in threshold value correspondence CQI value as the CQI value of the code word.

As a kind of implementation, second determining unit 64 is additionally operable to according to MI values and signal to noise ratio snr Between mapping relations obtain the code word average MI values equivalent SNR；According to the equivalent SNR and Selected modulation system, searches the corresponding relation between default CQI and SNR threshold values, and search Go out to meet the corresponding maximum CQI value of SNR threshold values of condition, using the maximum CQI value as described The CQI value of code word.

As a kind of implementation, the piecemeal processing unit 63 is additionally operable to the member to the upper triangular matrix Element carries out modulus processing, obtainsMatrix；

As a kind of implementation, second determining unit 64 is additionally operable to the layer according to ORTHOGONAL TRIANGULAR DECOMPOSITION Order recovery obtains correspondence code word to the layer order of the channel matrix received according to the demapping of layer to code word MI values；

Wherein, K is subcarrier number in bandwidth.

In the embodiment of the present invention, the piecemeal processing unit 63 is asked the element of the upper triangular matrix Mould processing, including：

It will be appreciated by those skilled in the art that the reality of each processing unit in CQI determining devices shown in Fig. 6 Existing function can refer to foregoing CQI determine method embodiment associated description and understand.CQI shown in Fig. 6 The function of each unit in determining device can be realized by running on the program on processor, can also pass through tool The logic circuit of body and realize.

The embodiment of the present invention also describes a kind of communication equipment, it is characterised in that before the communication equipment includes State the CQI determining devices of each embodiment.

In the embodiment of the present invention, communication equipment includes base station, via node, micro-base station etc., can also include Mobile terminal such as mobile phone etc..

, can in several embodiments provided herein, it should be understood that disclosed apparatus and method To realize by another way.Apparatus embodiments described above are only schematical, for example, institute The division of unit is stated, only a kind of division of logic function there can be other dividing mode when actually realizing, Such as：Multiple units or component can be combined, or be desirably integrated into another system, or some features can be neglected Slightly, or do not perform.In addition, the coupling each other of shown or discussed each part or directly coupling Close or communication connection can be by some interfaces, the INDIRECT COUPLING or communication connection of equipment or unit, can Be it is electrical, machinery or other forms.

The above-mentioned unit illustrated as separating component can be or may not be it is physically separate, as The part that unit is shown can be or may not be physical location, you can positioned at a place, also may be used To be distributed on multiple NEs；Part or all of unit therein can be selected according to the actual needs Realize the purpose of this embodiment scheme.

In addition, each functional unit in various embodiments of the present invention can be fully integrated into a processing unit, Can also be each unit individually as a unit, can also two or more units be integrated in one In individual unit；Above-mentioned integrated unit can both be realized in the form of hardware, it would however also be possible to employ hardware adds soft The form of part functional unit is realized.

One of ordinary skill in the art will appreciate that：Realize that all or part of step of above method embodiment can To be completed by the related hardware of programmed instruction, foregoing program can be stored in an embodied on computer readable and deposit In storage media, the program upon execution, performs the step of including above method embodiment；And foregoing storage Medium includes：Movable storage device, read-only storage (ROM, Read Only Memory), magnetic disc or Person's CD etc. is various can be with the medium of store program codes.

Or, if the above-mentioned integrated unit of the present invention is realized using in the form of software function module and as independently Production marketing or in use, can also be stored in a computer read/write memory medium.Based on so Understanding, the part that the technical scheme of the embodiment of the present invention substantially contributes to prior art in other words can To be embodied in the form of software product, the computer software product is stored in a storage medium, bag Some instructions are included to so that a computer equipment (can be personal computer, server or network Equipment etc.) perform all or part of each of the invention embodiment methods described.And foregoing storage medium bag Include：Movable storage device, read-only storage (ROM, Read Only Memory), magnetic disc or CD Etc. it is various can be with the medium of store program codes.

The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited to This, any one skilled in the art the invention discloses technical scope in, can readily occur in Change or replacement, should all be included within the scope of the present invention.Therefore, protection scope of the present invention should It is defined by the scope of the claims.

Claims

1. a kind of channel quality indicator (CQI) determines method, it is characterised in that methods described includes：

2. CQI according to claim 1 determines method, it is characterised in that described to be based on the code The average MI values of word determine the CQI value of the code word, including：

3. CQI according to claim 1 determines method, it is characterised in that described to be based on the code The average MI values of word determine the CQI value of the code word, including：

4. the CQI according to any one of claims 1 to 3 determines method, it is characterised in that described The mutual information MI values of each layer are determined, including：

5. the CQI according to any one of claims 1 to 3 determines method, it is characterised in that described The average MI values of code word are calculated according to the MI values of layer, including：

<mrow> <msub> <mi>MI</mi> <mi>j</mi> </msub> <mo>=</mo> <mfrac> <mn>1</mn> <mi>K</mi> </mfrac> <munderover> <mo>&Sigma;</mo> <mrow> <mi>k</mi> <mo>=</mo> <mn>0</mn> </mrow> <mrow> <mi>K</mi> <mo>-</mo> <mn>1</mn> </mrow> </munderover> <msub> <mi>MI</mi> <mi>j</mi> </msub> <mrow> <mo>(</mo> <mi>k</mi> <mo>)</mo> </mrow> </mrow>

Wherein, K is subcarrier number in bandwidth.

6. CQI according to claim 4 determines method, it is characterised in that the default corresponding table IncludingMapping table between matrix and layer MI.

7. CQI according to claim 4 determines method, it is characterised in that described to described upper three The element of angular moment battle array carries out modulus processing, including：

8. a kind of channel quality indicator (CQI) determining device, it is characterised in that described device includes：First Determining unit, normalized unit, resolving cell, piecemeal processing unit and the second determining unit, wherein：

9. CQI determining devices according to claim 8, it is characterised in that described second determines list Member, is additionally operable to the average MI values of code word MI values thresholding corresponding with CQI under default each modulation system Value is compared respectively, the maximum CQI value conduct in the MI values threshold value correspondence CQI value for the condition that meets The CQI value of the code word.

10. CQI determining devices according to claim 8, it is characterised in that described second determines list Member, is additionally operable to obtain the average MI of the code word according to the mapping relations between MI values and signal to noise ratio snr The equivalent SNR of value；According to the equivalent SNR and selected modulation system, search default CQI with Corresponding relation between SNR threshold values, and it is corresponding maximum to find out the SNR threshold values of the condition of satisfaction CQI value, using the maximum CQI value as the code word CQI value.

11. the CQI determining devices according to any one of claim 8 to 10, it is characterised in that institute Piecemeal processing unit is stated, is additionally operable to carry out modulus processing to the element of the upper triangular matrix, obtainsMatrix；

12. the CQI determining devices according to any one of claim 8 to 10, it is characterised in that the Two determining units, are additionally operable to the layer order recovery of foundation ORTHOGONAL TRIANGULAR DECOMPOSITION to the layer of the channel matrix received Sequentially, the MI values of correspondence code word are obtained according to the demapping of layer to code word；

Wherein, K is subcarrier number in bandwidth.

13. a kind of communication equipment, it is characterised in that it is any that the communication equipment includes claim 8 to 12 CQI determining devices described in.