CN102237913B - The system of selection of antenna data sending mode and device - Google Patents

Abstract

The invention discloses a kind of system of selection and device of antenna data sending mode.In the above-mentioned methods, transmitting terminal determines the data transmission modes being suitable for receiving terminal according to channel condition information from cdd mode and spatial reuse cdd mode; And transmitting terminal uses established data sending mode to send data.According to technical scheme provided by the invention, solve in correlation technique owing to lacking the scheme selecting data transmission modes in cyclic delay diversity and spatial reuse cyclic delay diversity, cannot according to system channel condition, select data transmission modes to be that cyclic delay diversity and spatial reuse cyclic delay diversity are to send data neatly.Add the stability of link and improve the throughput of system.

Description

The system of selection of antenna data sending mode and device

Technical field

The present invention relates to the communications field, in particular to a kind of system of selection and device of antenna data sending mode.

Background technology

Cyclic delay diversity (Cyclic Delay Diversity, referred to as CDD) be OFDM (Orthogonal Frequency Division Multiplexing, referred to as OFDM) inner conventional a kind of multiple antennas transmitting diversity scheme, it sends identical frequency domain data and carries out different circulation delays to the OFDM symbol of time domain on each physical antenna, obtains frequency diversity gain with this.As shown in Figure 1, information source, after chnnel coding, modulation, forms time domain data through inverse Fourier transform (Inverse Fast FourierTransform, referred to as IFFT) to its transmitting terminal schematic diagram, and with the circulation delay δ of corresponding physical antenna _iafter carrying out corresponding circulation delay, add Cyclic Prefix (Cyclic Prefix, referred to as CP) and send.Here, i=1 ..., Tx, wherein, Tx is transmitting terminal physical antenna number, δ ₁be generally 0.

Simultaneously spatial reuse (Spatial Multiplexing, referred to as SM) there is multiple antenna at transmitting terminal and receiving terminal, and transmitting terminal sends different data and sends stream on different physical antennas, to improve the transmission rate of data.As shown in Figure 2, in the system of transmitting terminal M root physical antenna and receiving terminal Rx root physical antenna, every root physical antenna sends different modulation symbols.

The combination of spatial reuse and cyclic delay diversity, forms a kind of transmission data method newly, is spatial reuse cyclic delay diversity (Spatial Multiplexing Cyclic DelayDiversity, referred to as SM+CDD).As shown in Figure 3, antenna is divided into M subarray to its transmitting terminal by system, and the antenna of each subarray carries out cyclic delay diversity, is equivalent to a virtual-antenna.Spatial reuse structure is formed between many virtual-antennas.

In general, cyclic delay diversity is in the same moment, and different physical antenna can only send data on same carrier wave, and signal to noise ratio is generally higher, can improve throughput by high order modulation coded system; Its covering is larger, compares suitable cell marginal reception end.Spatial reuse cyclic delay diversity is a moment, and different virtual antenna can send multiple different symbol on same carrier wave, and throughput is generally larger, but covers smaller.

Along with the change of receiving terminal position or channel condition, sometimes use cyclic delay diversity better, the multiplexing cyclic delay diversity of usage space is better sometimes.In order to improve the throughput of link stability and system, need to select different data transmission modes to adapt to different applied environments and channel condition.

Summary of the invention

For in correlation technique owing to lacking the scheme of data transmission modes selected in cyclic delay diversity and spatial reuse cyclic delay diversity, data transmission modes cannot be selected flexibly to increase link stability and to promote the problem of throughput and propose the present invention according to channel condition, for this reason, main purpose of the present invention is system of selection and the device of the antenna data sending mode providing a kind of improvement, to solve the problem one of at least.

According to an aspect of the present invention, a kind of system of selection of antenna data sending mode is provided.

System of selection according to antenna data sending mode of the present invention comprises: transmitting terminal determines to be suitable for the data transmission modes of receiving terminal from cyclic delay diversity CDD pattern and spatial reuse cyclic delay diversity SM+CDD pattern according to channel condition information; And transmitting terminal uses established data sending mode to send data.

According to a further aspect in the invention, a kind of choice device of antenna data sending mode is provided.

Choice device according to antenna data sending mode of the present invention comprises: determination module, for determining the data transmission modes being suitable for receiving terminal according to channel condition information from cyclic delay diversity CDD pattern and spatial reuse cyclic delay diversity SM+CDD pattern; Sending module, sends data for using established data sending mode.

Pass through the present invention, transmitting terminal is the data transmission modes being suitable for receiving terminal according to channel condition information determination cyclic delay diversity CDD pattern or spatial reuse cyclic delay diversity SM+CDD pattern, uses the data transmission modes transmitting antenna data being suitable for receiving terminal.Solve in correlation technique owing to lacking the scheme selecting data transmission modes in cyclic delay diversity and spatial reuse cyclic delay diversity, cannot according to system channel condition, select data transmission modes to be that cyclic delay diversity and spatial reuse cyclic delay diversity are to send data neatly.Utilize technique scheme, add the stability of link and improve the throughput of system.

Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from specification, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in write specification, claims and accompanying drawing and obtain.

Accompanying drawing explanation

Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:

Fig. 1 is the structural representation of CDD transmitting terminal in correlation technique;

Fig. 2 is the structural representation of spatial reuse in correlation technique (SM) transmitting terminal;

Fig. 3 be SM and the CDD in correlation technique combine the structural representation of transmitting terminal system;

Fig. 4 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention;

Fig. 5 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention one;

Fig. 6 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention two;

Fig. 7 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention three;

Fig. 8 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention four;

Fig. 9 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention five;

Figure 10 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention six;

Figure 11 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention seven;

Figure 12 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention eight;

Figure 13 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention nine;

Figure 14 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention ten;

Figure 15 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention 11;

Figure 16 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention 12;

Figure 17 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention 13; And

Figure 18 is the structured flowchart of the choice device of antenna data sending mode according to the embodiment of the present invention.

Embodiment

It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.

Wireless communication system comprises transmitting terminal and receiving terminal, and the transmitting terminal in the embodiment of the present invention is the equipment for sending data or information, such as macro base station, micro-base station etc.; Receiving terminal is each Terminal Type for receiving data or information, as travelling carriage, handheld device or data card etc.Introduce each embodiment of the present invention below all to be implemented based on this wireless communication system.

Fig. 4 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention.As shown in Figure 4, the system of selection of this antenna data sending mode comprises:

S402: transmitting terminal determines the data transmission modes being suitable for receiving terminal according to channel condition information from cyclic delay diversity CDD pattern and spatial reuse cyclic delay diversity SM+CDD pattern; And

S404: transmitting terminal uses established data sending mode to send data.

In correlation technique, owing to lacking the scheme selecting data transmission modes in cyclic delay diversity and spatial reuse cyclic delay diversity, data transmission modes cannot be selected flexibly to increase link stability and to promote throughput according to channel condition, adopt the technical scheme that above-described embodiment provides, can according to system channel condition, select neatly data transmission modes be cyclic delay diversity and spatial reuse cyclic delay diversity to send data, add the stability of link and improve the throughput of system.

In a wireless communication system, above-mentioned channel condition information can include but not limited to following one of at least: the information of CINR, BER, spatial coherence.

Wherein, BER, for missing burst rate or bit error rate, feeds back to transmitting terminal by receiving terminal; Or transmitting terminal is by calculating, and circular is as follows:

Specify in the minor cycle for one in the judgement cycle, the burst number that statistics transmitting terminal sends altogether is M _totalindividual, corresponding bit number is B _totalbit, the burst number that HARQ or AQR first retransmits is M _repindividual, corresponding bit number B _repbit, then corresponding mistake burst rate is BER=M _rep/ M _total, or bit error rate BER=B _rep/ B _total.

Wherein, CINR comprises the CINR under cyclic delay diversity data transmission modes or the CINR under spatial reuse cyclic delay diversity data transmission modes.It can be that receiving terminal calculates and feeds back to transmitting terminal, also can be that transmitting terminal oneself calculates

Wherein, above-mentioned spatial coherence is by the conditional number of channel correlation matrix represent, preferred account form (namely within the selected cycle, carry out design conditions number according to channel correlation matrix R in a frame or multiframe ) as follows:

(1) initialization earlier channel correlation matrix R _pre, in selected cycle T, repeated execution of steps (2) is until cycle T terminates.

(2) in cycle T, according to time sequencing, the channel relevancy matrix of active user in the frame structure in specific carriers set is calculated: here, N _crepresent the number carrier set that is used for calculating channel relevancy matrix comprising carrier wave, and α _k>=0 is channel coefficient matrix and the proportionality coefficient of a kth subcarrier in above-mentioned carrier set respectively.H _ijk () is the channel coefficients on the kth carrier wave between jth root transmitting antenna to i root reception antenna, j=1 ..., M, i=1 ..., N, M are actual physics transmitting antenna number or virtual-antenna number, and N is reception antenna number.

Earlier channel correlation matrix is updated to R _pre=ρ R _pre+ (1-ρ) R, ρ are constant and 0≤ρ≤1.

(3) conditional number of earlier channel correlation matrix is calculated: wherein, f be one about correlation matrix R _preprocess, be preferably:

$f\left(R_{\mathrm{Pre}}\right)=\frac{{\mathrm{\λ}}_{\min }\left(R_{\mathrm{Pre}}\right)}{\mathrm{tr}\left(R_{\mathrm{Pre}}\right)}$ Or $f\left(R_{\mathrm{Pre}}\right)=\frac{{\mathrm{\λ}}_{\min }\left(R_{\mathrm{Pre}}\right)}{{\mathrm{\λ}}_{\max }\left(R_{\mathrm{Pre}}\right)}$ Or f (R _pre)=λ _min(R _pre)

Wherein, the mark of tr (A) representing matrix A, subscript H represents Matrix Calculating transposition in distress altogether.λ _max(R _pre), λ _min(R _pre) be respectively matrix R _preminimum and maximum characteristic value.

In preferred implementation process, above-mentioned channel condition information comprises CINR, and the data transmission modes that above-mentioned transmitting terminal determines to be suitable for receiving terminal may further include following process:

(1) the signal to noise ratio CINR under CDD pattern is determined _cDDcorresponding order of modulation M _cDD, code rate P _cDD, coding number of repetition R _cDD, and calculate the transmission rate V under CDD pattern _cDD=M _cDD× P _cDD÷ R _cDD;

(2) signal to noise ratio CINR when determining to adopt modulation coding mode under SM+CDD pattern _sMCDDcorresponding order of modulation M _sMCDD, code rate P _sMCDD, coding number of repetition R _sMCDD, and calculate the transmission rate V under SM+CDD pattern _sMCDD=α × M _sMCDD× P _sMCDD÷ R _sMCDD, wherein, code rate when α is spatial reuse ring delay diversity;

(3) at V _cDDwith V _sMCDDin determine the greater, and determine that the data transmission modes that the greater is corresponding is the data transmission modes being suitable for receiving terminal.

By above-mentioned process, the data transmission modes of applicable receiving terminal can be determined according to CINR, thus data transmission modes can be selected neatly to be that cyclic delay diversity and spatial reuse cyclic delay diversity are to send data.

Below in conjunction with Fig. 5, above-mentioned preferred implementation process is described.

Fig. 5 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention one.As shown in Figure 5, transmitting terminal is handled as follows all receiving terminals that it is served:

Step S502: calculate the signal to noise ratio CINR of this receiving terminal under cyclic delay diversity _cDD, and to table look-up lattice with it, find the order of modulation M that the modulation coding mode under this signal to noise ratio applicable is corresponding _cDD, code rate P _cDD, number of repetition R _cDD, and under computation cycles delay diversity data transmission modes, transmission rate is V _cDD=M _cDD× P _cDD/ R _cDD;

Step S504: calculate the CINR of receiving terminal under spatial reuse cyclic delay diversity data transmission modes _sMCDDdetermine the order of modulation M corresponding to its modulation coding mode _sMCDD, code rate P _sMCDD, coding number of repetition R _sMCDD; Transmission rate V under the multiplexing cyclic delay diversity data transmission modes of computer memory _sMCDD=α × M _sMCDD× P _sMCDD/ R _sMCDD; MIMO code rate when α is spatial reuse.

Step S506: compare V _cDD, V _sMCDDif, V _cDD>=V _sMCDDselect cdd mode (namely determining that CDD pattern is suitable data transmission modes), otherwise, select spatial reuse cdd mode (namely determining that SM+CDD pattern is suitable data transmission modes), and send the data of this receiving terminal by selected data transmission modes.

In preferred implementation process, channel condition information comprises the information of spatial coherence, and spatial coherence is by the conditional number of channel correlation matrix represent, the data transmission modes that above-mentioned transmitting terminal determines to be suitable for receiving terminal can further include following process:

(1) acquisition is calculated

or or wherein, described tr (R) represents the mark of channel relevancy matrix R, λ _maxand λ (R) _min(R) eigenvalue of maximum and the minimal eigenvalue of described R is represented respectively;

Above-mentioned R can calculate again in the following manner: wherein, N represents the number carrier set for calculating channel relevancy matrix comprising carrier wave, and α _k>=0 is channel coefficient matrix and the proportionality coefficient of a kth subcarrier in above-mentioned carrier set respectively, h _ijk () is the channel coefficients on the kth carrier wave between jth root transmitting antenna to i root reception antenna, j=1 ..., M, i=1 ..., N, M are actual physics transmitting antenna number or virtual-antenna number, and N is reception antenna number.

Because above-mentioned numerical procedure only carrys out design conditions number according to channel correlation matrix R in a frame , the conditional number thus calculated can not representation space correlation very accurately.

In reality, optimal way above-mentioned can be adopted to carry out design conditions number , namely within the selected cycle, carry out design conditions number according to channel correlation matrix R in multiframe .According to the conditional number that this kind of mode calculates spatial coherence can be embodied preferably.Preferred account form is mentioned above, repeats no more herein.

(2) if greater than condition number threshold value time, determine that SM+CDD pattern is applicable data transmission modes, otherwise, determine that CDD pattern is the data transmission modes being suitable for receiving terminal.

By above-mentioned process, the data transmission modes of applicable receiving terminal can be determined according to the information of spatial coherence, thus data transmission modes can be selected neatly to be that cyclic delay diversity and spatial reuse cyclic delay diversity are to send data.

Below in conjunction with Fig. 6, above-mentioned preferred implementation process is described.

Fig. 6 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention two.As shown in Figure 6, transmitting terminal predetermined threshold value all receiving terminals of its service are handled as follows:

Step S602: initialization earlier channel correlation matrix R _pre, in selected cycle T, repeated execution of steps S604 is until cycle T terminates.

Step S604: in cycle T, according to time sequencing, calculates the channel relevancy matrix that active user is used for calculating in the carrier set of channel relevancy matrix in the frame structure: here, N _crepresent the number above-mentioned carrier set comprising carrier wave, and α _k>=0 is channel coefficient matrix and the proportionality coefficient of a kth subcarrier in specific carriers set respectively.H _ijk () is the channel coefficients on the kth carrier wave between jth root transmitting antenna to i root reception antenna, j=1 ..., M, i=1 ..., N, M are actual physics transmitting antenna number or virtual-antenna number, and N is reception antenna number.

Here, be used for calculating the carrier set of channel relevancy matrix, can be the time-frequency two-dimensional data subcarrier that receiving terminal sends in subchannel corresponding to upstream data, or the data subcarrier etc. in subcarrier corresponding to ascending pilot frequency or subchannel corresponding to the downlink data that sends to receiving terminal.

Earlier channel correlation matrix is updated to R _pre=ρ R _pre+ (1-ρ) R, ρ are constant and 0≤ρ≤1.

Step S606: the conditional number calculating earlier channel correlation matrix: wherein, f be one about correlation matrix R _preprocess, be preferably:

Wherein, the mark of tr (A) representing matrix A, subscript H represents Matrix Calculating transposition in distress altogether.λ _max(R _pre), λ _min(R _pre) be respectively matrix R _preminimum and maximum characteristic value.

$f\left(R_{\mathrm{Pre}}\right)=\frac{{\mathrm{\λ}}_{\min }\left(R_{\mathrm{Pre}}\right)}{\mathrm{tr}\left(R_{\mathrm{Pre}}\right)}$ Or $f\left(R_{\mathrm{Pre}}\right)=\frac{{\mathrm{\λ}}_{\min }\left(R_{\mathrm{Pre}}\right)}{{\mathrm{\λ}}_{\max }\left(R_{\mathrm{Pre}}\right)}$ Or f (R _pre)=λ _min(R _pre)

Step S608: if selected spatial reuse cdd mode, otherwise, select cdd mode

Step S610: the data sending this receiving terminal by selected data transmission modes.

In preferred implementation process, above-mentioned channel condition information comprises BER, and the data transmission modes that above-mentioned transmitting terminal determines to be suitable for receiving terminal may further include following process:

(1) unit arranging the first judgement cycle T 1, T1 is frame;

(2) BER of receiving terminal feedback is obtained, or the BER under utilizing mixed automatic retransfer or autonomous retransmission to calculate current data sending mode;

(3) if BER is less than send out rate threshold value B ER by mistake ₀, then determine that SM+CDD pattern is applicable data transmission modes, otherwise determine that CDD pattern is applicable data transmission modes.

By above-mentioned process, the data transmission modes of applicable receiving terminal can be determined according to BER, thus data transmission modes can be selected neatly to be that cyclic delay diversity and spatial reuse cyclic delay diversity are to send data.

Below in conjunction with Fig. 7, above-mentioned preferred implementation process is described.

Fig. 7 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention three.As shown in Figure 7, transmitting terminal predetermined threshold value BER ₀, all receiving terminals of its service are handled as follows:

Step S702: the BER obtaining receiving terminal feedback, or the BER under utilizing HARQ or ARQ to calculate current data sending mode;

Step S704: if BER < is BER ₀, select spatial reuse cdd mode more excellent, otherwise select cdd mode more excellent.

Step S706: send data by selected more excellent data transmission modes.

In preferred implementation process, channel condition information comprises: BER and CINR, and the data transmission modes that above-mentioned transmitting terminal determines to be suitable for receiving terminal can further include following process:

(1) to the receiving terminal of current use CDD pattern, the CINR under CDD pattern is obtained, if CINR is greater than the first signal-noise ratio threshold value CDD_TH ₀, then determine that SM+CDD pattern is applicable data transmission modes, otherwise, determine that CDD pattern is applicable data transmission modes.

(2) to the receiving terminal of current use SM+CDD pattern, the BER of this receiving terminal feedback is obtained, or the BER under utilizing mixed automatic retransfer or autonomous retransmission to calculate current data sending mode, if BER is greater than send out rate threshold value B ER by mistake ₀, determine that CDD pattern is applicable data transmission modes, otherwise, determine that SM+CDD pattern is applicable data transmission modes.

By above-mentioned process, the data transmission modes of applicable receiving terminal can be determined according to CINR and BER, thus data transmission modes can be selected neatly to be that cyclic delay diversity and spatial reuse cyclic delay diversity are to send data.

Below in conjunction with Fig. 8, above-mentioned preferred implementation process is described.

Fig. 8 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention four.As shown in Figure 8, transmitting terminal predetermined threshold value BER ₀and CDD_TH ₀, all receiving terminals of its service are handled as follows:

Step S802: to the receiving terminal of current use cdd mode, obtains the CINR under cdd mode, if CINR > is CDD_TH1, then determines that spatial reuse cdd mode is more excellent; Otherwise, determine that cdd mode is more excellent.

Step S804: to the receiving terminal of the multiplexing cdd mode of current usage space, within the judgement cycle, obtains the BER of receiving terminal feedback, or the BER under utilizing HARQ or ARQ to calculate current data sending mode; If BER > is BER ₀, select cdd mode more excellent, otherwise select spatial reuse cdd mode more excellent.

Step S806: send data by selected more excellent data transmission modes.

In preferred implementation process, channel condition information comprises signal to noise ratio CINR, and the data transmission modes that transmitting terminal determines to be suitable for receiving terminal can further include following process:

(1) the first thresholding interval [CDD_TH1 is set, CDD_TH2], to the receiving terminal using CDD pattern, calculate the CINR under CDD pattern, if CINR < is CDD_TH1, then determine that CDD pattern is the data transmission modes being suitable for receiving terminal; If CINR > is CDD_TH2, then determine that SM+CDD pattern is the data transmission modes being suitable for receiving terminal; If CINR is arranged in the first thresholding interval, the scheme that any one transmitting terminal above-mentioned determines to be suitable for the data transmission modes of receiving terminal can be performed, determine that CDD pattern or SM+CDD pattern are the data transmission modes being suitable for receiving terminal;

(2) the second threshold value interval [SMCDD_TH1, SMCDD_TH2] is set, to the receiving terminal using SM+CDD pattern, the CINR under the multiplexing cdd mode of computer memory; If CINR < is SMCDD_TH1, then determine that CDD pattern is the data transmission modes being suitable for receiving terminal; If CINR > is SMCDD_TH2, then determine that SM+CDD pattern is the data transmission modes being suitable for receiving terminal; If CINR is arranged in the second threshold value interval, then can perform the scheme that any one transmitting terminal above-mentioned determines to be suitable for the data transmission modes of receiving terminal, determine that CDD pattern or SM+CDD pattern are the data transmission modes being suitable for receiving terminal.

Below in conjunction with Fig. 9, above-mentioned preferred implementation process is described.

Fig. 9 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention five.As shown in Figure 9, transmitting terminal presets interval threshold value [CDD_TH1, CDD_TH2] and [SMCDD_TH1, SMCDD_TH2].Herein, 0≤CDD_TH1≤CDD_TH2,0≤SMCDD_TH1≤SMCDD_TH2, is handled as follows all receiving terminals of its service:

Step S902: current data receiver formula is the receiving terminal of cdd mode; Calculate the CINR under this pattern, if CINR < is CDD_TH1, then determine that cdd mode is more excellent; If CINR > is CDD_TH2, then determine that spatial reuse cdd mode is more excellent; If CDD_TH1≤CINR≤CDD_TH2, then perform the scheme (specifically can see Fig. 5 ~ Fig. 8) that any one transmitting terminal above-mentioned determines to be suitable for the data transmission modes of receiving terminal, determine cdd mode or spatial reuse cdd mode more excellent.

Step S904: current data receiver formula is the receiving terminal of spatial reuse cdd mode; Calculate the CINR under this pattern, if CINR < is SMCDD_TH1, then determine that cdd mode is more excellent; If CINR > is SMCDD_TH2, then determine that spatial reuse cdd mode is more excellent; If SMCDD_TH1≤CINR≤SMCDD_TH2, then perform the scheme (specifically can see Fig. 5 ~ Fig. 8) that any one transmitting terminal above-mentioned determines to be suitable for the data transmission modes of receiving terminal, determine cdd mode or spatial reuse cdd mode more excellent.

Step S906: send data by selected more excellent data transmission modes.

In preferred implementation process, the data transmission modes that above-mentioned transmitting terminal determines to be suitable for receiving terminal can further include following process:

(1) unit arranging the second judgement cycle T 2, T2 is frame;

(2) L determination point is set in the second judgement cycle, wherein, L be greater than 1 integer;

(3) perform at each determination point the scheme that any one transmitting terminal above-mentioned determines to be suitable for the data transmission modes of receiving terminal, determine that CDD pattern or SM+CDD pattern are the data transmission modes being suitable for receiving terminal, and add up the times N 1 that CDD pattern is the data transmission modes being suitable for receiving terminal, or statistics SM+CDD pattern is the times N 2 of the data transmission modes being suitable for receiving terminal;

(4) if N1/L is more than or equal to predetermined value Tr, determine that CDD pattern is the data transmission modes being suitable for receiving terminal, otherwise, determine that SM+CDD pattern is the data transmission modes being suitable for receiving terminal;

(5) if N2/L is more than or equal to predetermined value Tr, determine that SM+CDD pattern is the data transmission modes being suitable for receiving terminal, otherwise, determine that CDD pattern is the data transmission modes being suitable for receiving terminal.

Below in conjunction with Figure 10 and Figure 11, above-mentioned preferred implementation process is described.

Figure 10 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention six.As shown in Figure 10, setting threshold T r and judgement cycle T unit are frames, set L judgement moment (determination point), be handled as follows all receiving terminals of its service within the judgement cycle:

Step S1002: initialization CDD_NUM=0;

Step S1004: perform the scheme that any one transmitting terminal above-mentioned determines to be suitable for the data transmission modes of receiving terminal in each judgement moment, if cdd mode is more excellent, then CDD_NUM=CDD_NUM+1;

Step S1006: repeated execution of steps S1004 until end cycle or (CDD_NUM/L) >=Tr;

Step S1008: if (CDD_NUM/L) >=Tr, selects cdd mode more excellent, otherwise selects spatial reuse cdd mode more excellent.

Step S1010: carry out transmission data by the more excellent data transmission modes of selection in next cycle.Enter the next judgement cycle.

Figure 11 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention seven; As shown in figure 11, setting threshold T r and adjudicating cycle T unit is frame; Within the judgement cycle, set L judgement moment (determination point), all receiving terminals of its service be handled as follows:

Step S1102: initialization SMCDD_NUM=0;

Step S1104: perform the scheme that any one transmitting terminal above-mentioned determines to be suitable for the data transmission modes of receiving terminal in each judgement moment, if spatial reuse cdd mode is more excellent, then SMCDD_NUM=SMCDD_NUM+1;

Step S1106: repeated execution of steps S1104 until end cycle or (SMCDD_NUM/L) >=Tr;

Step S1108: if (SMCDD_NUM/L) >=Tr, selects spatial reuse cdd mode more excellent, otherwise selects cdd mode more excellent.

Step S1110: carry out transmission data by the more excellent data transmission modes of selection in next cycle.Enter the next judgement cycle.

In preferred implementation process, the data transmission modes that transmitting terminal determines to be suitable for receiving terminal can further include following process:

(1) unit arranging the 3rd judgement cycle T 3, T3 is frame;

(2) within the 3rd judgement cycle, transmitting terminal judges data transmission rate trend according to channel condition information;

Preferably, channel condition information comprises CINR, and step (2) may further include following process:

A, multiple determination point is set within the 3rd judgement cycle, the CINR successively under each determination point obtains current data sending mode, and adds up CINR>=CINR in the 3rd judgement cycle ₀times N _s, CINR ₀it is the second signal-noise ratio threshold value;

If B is N _s≤ N ₁, then determine that data transmission rate trend is for declining, N ₁be first number threshold value; If N _s>=N ₂, then determine that data transmission rate trend is for rising, N ₂be second number threshold value; If N ₁< N _s< N ₂, then determine that data transmission rate trend is constant.

Preferably, channel condition information comprises sends out rate BER by mistake, and step (2) can further include following process:

A, the 3rd judgement cycle was divided into multiple minor cycle;

B, within each minor cycle, obtain the BER of receiving terminal feedback or the BER under utilizing mixed automatic retransfer or autonomous retransmission to calculate current data sending mode successively;

C, statistics the 3rd judgement cycle in BER≤BER ₀times N _s, BER ₀for sending out rate threshold value by mistake;

If D is N _s≤ N ₁, then determine that data transmission rate trend is for declining, N ₁be first number threshold value; If N _s>=N ₂, then determine that data transmission rate trend is for rising, N ₂be second number threshold value; If N ₁< N _s< N ₂, then determine that data transmission rate trend is constant.

(3) determine that CDD pattern or SM+CDD pattern are the data transmission modes being suitable for receiving terminal according to data transmission rate trend.

Preferably, step (3) may further include following process:

If A transmission rate trend rises, between current data transmission rate and maximum transmission rate, determine that pattern corresponding to data transmission rate is the data transmission modes being suitable for receiving terminal;

Preferably, between current data transmission rate and maximum transmission rate, determine the pattern that a data transmission rate is corresponding, can inquire about in pre-configured Speedometer Drive, obtain the pattern that this data transmission rate is corresponding.

Wherein, above-mentioned Speedometer Drive is transmitting terminal according to the pre-configured form of method below: transmission rate corresponding for different modulating coded system when transmission rate corresponding for different modulating coded system when using cyclic delay diversity and usage space multiplexing cyclic delay diversity sorted, form a form, and the direction that regulation transmission rate increases is the direction that speed rises, and the direction that transmission rate reduces is the direction that speed declines.Every a line in form can comprise data transmission modes, modulation coding mode, transmission rate and unique index ID (Index).An example as shown in Table 1, in form, arranges by transmission rate from small to large.Coding number of repetition R=1, α=1 during cyclic delay diversity, α=2 during spatial reuse cyclic delay diversity.Modulation system comprises quarternary phase-shift keying (QPSK) (Quadrature Phase Shift Keying, referred to as QPSK), quadrature amplitude modulation (Quadrature Amplitude Modulation, referred to as QAM), 16QAM, 64QAM, code rate comprises 1/2,2/3,3/4,5/6.

Table 1

Data transmission modes	Modulation coding mode	Data transmission rate (bit/hertz)	Index ID
				Cyclic delay diversity	QPSK 1/2	1	1

Cyclic delay diversity	QPSK 3/4	1.5	2
				Cyclic delay diversity	16QAM 1/2	2	3
Spatial reuse cyclic delay diversity	QPSK 1/2	2	4
				Cyclic delay diversity	64QAM 1/2	3	5
Spatial reuse cyclic delay diversity	QPSK 3/4	3	6
				Cyclic delay diversity	64QAM 2/3	4	7
Spatial reuse cyclic delay diversity	16QAM 1/2	4	8
				Cyclic delay diversity	64QAM 3/4	4.5	9
Cyclic delay diversity	64QAM 5/6	5	10
				Spatial reuse cyclic delay diversity	64QAM 1/2	6	11
Spatial reuse cyclic delay diversity	64QAM 2/3	8	12

Spatial reuse cyclic delay diversity	64QAM 3/4	9	13
				Spatial reuse cyclic delay diversity	64QAM 5/6	10	14

If B transmission rate trend declines, between current data transmission rate and minimum transmission rate, determine that pattern corresponding to data transmission rate is the data transmission modes being suitable for receiving terminal;

Preferably, between current data transmission rate and minimum transmission rate, determine the pattern that a data transmission rate is corresponding, also can inquire about in pre-configured Speedometer Drive, obtain the pattern that this data transmission rate is corresponding.

If C transmission rate trend is constant, keep current data transmission modes constant.

Below in conjunction with Figure 12 ~ Figure 17, above-mentioned preferred implementation process is described.

Figure 12 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention eight.Wherein, multiple receiving terminal has been served below a transmitting terminal.At transmitting terminal end configuration judgement cycle N _tthe unit of T, T is frame, N _tit is the minor cycle number in the judgement cycle.The threshold value of configuration BER is BER ₀, the threshold value of statistic is N ₁, N ₂, be positive integer, and N ₁≤ N ₂.Configured rate table, as shown in Table 1 above.Transmitting terminal is at each judgement cycle N _teach receiving terminal is handled as follows in T, to adjust data transmission rate, and by modulation coding mode corresponding to data transmission rate and data transmission modes transmission data.

Step S1202: if first time adjustment, initialization ID=1, that is, select cyclic delay diversity data transmission modes and modulating-coding method mode to be that QPSK1/2 transmits data, otherwise ID is the value of last adjustment, i=1.

Step S1204: the burst number that statistics transmitting terminal sends altogether within the cycle of (i-1) T+1 to iT is M _totalindividual, corresponding bit number is B _totalbit, the burst number that HARQ or AQR first retransmits is M _repindividual, corresponding bit number B _repbit, then corresponding bit error rate BER=B _rep/ B _total.

Step S1206:i=i+1; If BER≤BER ₀, N _s=N _s+ 1.

Step S1208: repeat step S1204 to step S1206, until judgement end cycle or N _s>=N ₂.

Step S1210: if N _s>=N ₂, judge that this receiving terminal transmission rate trend rises, ID=min (ID+1,14); If N _s≤ N ₁, judgement declines, ID=max (1, ID-1); If N ₁< N _s< N ₂, keep message transmission rate constant, i.e. ID=ID.

Step S1212: the ID selected with step S1210 corresponding data transmission modes transmission data.

It should be noted that the method adopted in the present embodiment can be also BER=M with missing burst rate _rep/ M _totalrealize.

Figure 13 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention nine.Wherein, below a transmitting terminal, serve multiple receiving terminal, at transmitting terminal configuration judgement cycle N _tthe unit of T, T is frame, N _tit is the minor cycle number in the judgement cycle.The threshold value of configuration BER is BER ₀, the threshold value of statistic is N ₁, N ₂, be positive integer, and N ₁≤ N ₂.Configured rate table, as shown in table 1.Transmitting terminal is at each judgement cycle N _teach receiving terminal is handled as follows in T, to adjust data transmission rate, and by modulation coding mode corresponding to data transmission rate and data transmission modes transmission data.

Step S1302 ~ step S1304: identical with above-mentioned steps S1202 ~ step S1204, repeats no more herein.

Step S1306:i=i+1; If BER>=BER ₀, N _s=N _s+ 1.

Step S1308: repeat step S1304 to step S1306, until judgement end cycle or N _s>=N ₂.

Step S1310: if N _s>=N ₂, judge that this receiving terminal transmission rate trend declines, ID=max (1, ID-1); If N _s≤ N ₁judgement is risen, ID=min (ID+1,14); If N ₁< N _s< N ₂, keep message transmission rate constant, ID=ID.

Step S1312: the ID selected with step S1310 corresponding data transmission modes transmission data.

It should be noted that the method adopted in the present embodiment can be also BER=M with missing burst rate _rep/ M _totalrealize.

Figure 14 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention ten.Wherein, multiple receiving terminal has been served below a transmitting terminal.At transmitting terminal end configuration judgement cycle N _tthe unit of T, T is frame, N _tit is the minor cycle number in the judgement cycle.The initial value of configuration BER is BER ₀, the threshold value of statistic is N ₁, N ₂, be positive integer, and N ₁≤ N ₂.Configured rate table, as shown in table 1.Transmitting terminal is at each judgement cycle N _teach receiving terminal is handled as follows in T, to adjust data transmission rate, and by modulation coding mode corresponding to data transmission rate and data transmission modes transmission data.

Step S1402 ~ step S1404: identical with above-mentioned steps S1202 ~ step S1204, repeats no more herein.

Step S1406: if BER≤BER ₀, N _s=N _s+ 1;

Step S1408:i=i+1; BER ₀=BER.

Step S1410: repeat step S1404 ~ step S1408 until judgement end cycle or N _s>=N ₂.

Step S1412: if N _s>=N ₂, judge that this receiving terminal transmission rate trend rises, ID=min (ID+1,14); If N _s≤ N ₁, judgement declines, ID=max (1, ID-1); If N ₁< N _s< N ₂, keep message transmission rate constant, ID=ID.

Step S1414: the ID selected with step S1412 corresponding data transmission modes transmission data.

It should be noted that the method adopted in the present embodiment can be also BER=M with missing burst rate _rep/ M _totalrealize.

Figure 15 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention 11.Wherein, multiple receiving terminal has been served below a transmitting terminal.At transmitting terminal end configuration judgement cycle N _tthe unit of T, T is frame, N _tit is the minor cycle number in the judgement cycle.The threshold value of configuration CINR is CINR ₀, the threshold value of statistic is N ₁, N ₂, be positive integer, and N ₁≤ N ₂.Configured rate table, as shown in Table 1.Transmitting terminal is at each judgement cycle N _teach receiving terminal is handled as follows in T, to adjust data transmission rate, and by modulation coding mode corresponding to data transmission rate and data transmission modes transmission data.

Step S1502: if first time adjustment, initialization ID=1, that is, select cyclic delay diversity data transmission modes and modulating-coding method mode to be that QPSK1/2 transmits data, otherwise ID is the value of last adjustment.i＝1。

Step S1504: at judgement moment iT, obtain the CINR under current data sending mode.

Step S1506:i=i+1; If CINR>=CINR ₀, N _s=N _s+ 1.

Step S1508: repeat step S 1504 ~ step S 1506 until judgement end cycle or N _s>=N ₂.

Step S1510: if N _s>=N ₂, judge that this receiving terminal transmission rate trend rises, ID=min (ID+1,14); If N _s≤ N ₁, judgement declines, ID=max (1, ID-1); If N ₁< N _s< N ₂, keep message transmission rate constant, ID=ID.

Step S1512: the ID selected with step S1510 corresponding data transmission modes transmission data.

Figure 16 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention 12.Wherein, multiple receiving terminal has been served below a transmitting terminal.At transmitting terminal end configuration judgement cycle N _tthe unit of T, T is frame, N _tit is the minor cycle number in the judgement cycle.The threshold value of configuration CINR is CINR ₀, the threshold value of statistic is N ₁, N ₂, be positive integer, and N ₁≤ N ₂.Configured rate table, as shown in Table 1.Transmitting terminal is at each judgement cycle N _teach receiving terminal is handled as follows in T, to adjust data transmission rate, and by modulation coding mode corresponding to data transmission rate and data transmission modes transmission data.

Step S1602 ~ step S1604: identical with above-mentioned steps S1502 ~ step S1504, repeats no more herein.

Step S1606:i=i+1; If CINR≤CINR ₀, N _s=N _s+ 1.

Step S1608: repeat step S1604 ~ step S1606 until judgement end cycle or N _s>=N ₂.

Step S1610: if N _s>=N ₂, judge that this receiving terminal transmission rate trend declines, ID=max (1, ID-1); If N _s≤ N ₁, judgement is risen, ID=min (ID+1,14); If N ₁< N _s< N ₂, keep message transmission rate constant, ID=ID.

Step S1612: the ID selected with step S1610 corresponding data transmission modes transmission data.

Figure 17 is the flow chart of the system of selection of antenna data sending mode according to the embodiment of the present invention 13.Wherein, multiple receiving terminal has been served below a transmitting terminal.At transmitting terminal end configuration judgement cycle N _tthe unit of T, T is frame, N _tit is the minor cycle number in the judgement cycle.The initial value of configuration CINR is CINR ₀, the threshold value of statistic is N ₁, N ₂, be positive integer, and N ₁≤ N ₂.Configured rate table, as shown in Table 1.Transmitting terminal is at each judgement cycle N _teach receiving terminal is handled as follows in T, to adjust data transmission rate, and by modulation coding mode corresponding to data transmission rate and data transmission modes transmission data.

Step S1702 ~ step S1704: identical with above-mentioned steps S1502 ~ step S1504, repeats no more herein.

Step S1706: if CINR>=CINR ₀, N _s=N _s+ 1.

Step S1708:i=i+1; CINR ₀=CINR.

Step S1710: repeat step S1704 ~ step S1708 until judgement end cycle or N _s>=N ₂.

Step S1712: if N _s>=N ₂, judge that this receiving terminal transmission rate trend rises, ID=min (ID+1,14); If N _s≤ N ₁, judgement declines, ID=max (1, ID-1); If N ₁< N _s< N ₂, keep message transmission rate constant, ID=ID.

Step S1714: the ID selected with step S1712 corresponding data transmission modes transmission data.

Figure 18 is the structured flowchart of the choice device of antenna data sending mode according to the embodiment of the present invention.The choice device of this antenna data sending mode comprises: determination module 10 and sending module 12.

Determination module 10, for determining the data transmission modes being suitable for receiving terminal according to channel condition information from cdd mode and spatial reuse cdd mode;

Sending module 12, for using established data sending mode transmitting antenna data.

Adopt said apparatus, can according to system channel state information, select data transmission modes to be that cyclic delay diversity and spatial reuse cyclic delay diversity are to send data neatly.Thus add the stability of link and improve the throughput of system.

In a wireless communication system, above-mentioned channel condition information can include but not limited to following one of at least: the information of CINR, BER, spatial coherence.

Wherein, BER, for missing burst rate or bit error rate, feeds back to transmitting terminal by receiving terminal; Or transmitting terminal is by calculating, and circular face is mentioned, and repeats no more herein.

Wherein, above-mentioned spatial coherence is by the conditional number of channel correlation matrix represent, computational process also mention above, repeat no more herein.

Preferably, determination module 10 may further include: the first determining unit 100, signal to noise ratio CINR during for determining to adopt modulation coding mode under CDD pattern _cDDcorresponding order of modulation M _cDD, code rate P _cDD, coding number of repetition R _cDD; First computing unit 102, for calculating the transmission rate V under CDD pattern _cDD=M _cDD× P _cDD÷ R _cDD; Second determining unit 104, signal to noise ratio CINR during for determining to adopt modulation coding mode under SM+CDD pattern _sMCDDcorresponding order of modulation M _sMCDD, code rate P _sMCDD, coding number of repetition R _sMCDD; Second computing unit 106, for calculating the transmission rate V under SM+CDD pattern _sMCDD=α × M _sMCDD× P _sMCDD÷ R _sMCDD, wherein, code rate when α is spatial reuse ring delay diversity; 3rd determining unit 108, at V _cDDwith V _sMCDDin determine the greater, and determine that the data transmission modes that the greater is corresponding is applicable data transmission modes.

In preferred implementation process, the working method that above-mentioned each unit be combined with each other see Fig. 5, can repeat no more herein.

Preferably, determination module 10 may further include and calculates unit 11 for calculating acquisition ; 4th determining unit 112, for greater than condition number threshold value time, determine that SM+CDD pattern is applicable data transmission modes, otherwise, determine that CDD pattern is applicable data transmission modes.

In preferred implementation process, the working method that above-mentioned each unit be combined with each other see Fig. 6, can repeat no more herein.

Preferably, determination module 10 may further include: the first setting unit 114, and for arranging the first judgement cycle T 1, wherein, the unit of T1 is frame; First acquiring unit 116, for obtaining the BER of receiving terminal feedback, or the BER under utilizing mixed automatic retransfer or autonomous retransmission to calculate current data sending mode; 5th determining unit 118, sends out rate threshold value B ER for being less than at BER by mistake ₀time, determine that SM+CDD pattern is applicable data transmission modes, otherwise determine that CDD pattern is applicable data transmission modes.

In preferred implementation process, the working method that above-mentioned each unit be combined with each other see Fig. 7, can repeat no more herein.

Preferably, determination module 10 may further include: second acquisition unit 120, for the receiving terminal using CDD pattern, obtains the CINR under CDD pattern; 6th determining unit 122, for being greater than the first signal-noise ratio threshold value CDD_TH at CINR ₀time, determine that SM+CDD pattern is applicable data transmission modes, otherwise, determine that CDD pattern is applicable data transmission modes; 3rd acquiring unit 124, for the receiving terminal using SM+CDD pattern, obtains the BER of this receiving terminal feedback, or the BER under utilizing mixed automatic retransfer or autonomous retransmission to calculate current data sending mode; 7th determining unit 126, sends out rate threshold value B ER for being greater than at BER by mistake ₀time, determine that CDD pattern is applicable data transmission modes, otherwise, determine that SM+CDD pattern is applicable data transmission modes.

In preferred implementation process, the working method that above-mentioned each unit be combined with each other see Fig. 8, can repeat no more herein.

In preferred implementation process, CINR can also be adopted to determine with above-mentioned each scheme that scheme combines, to determine that CDD pattern or SM+CDD pattern are the data transmission modes (namely more excellent data receiver formula) being suitable for receiving terminal.Can see Fig. 9.

In preferred implementation process, the judgement cycle can also be adopted to determine with above-mentioned each scheme that scheme combines, to determine that CDD pattern or SM+CDD pattern are the data transmission modes (namely more excellent data receiver formula) being suitable for receiving terminal.Can see Figure 10.

Preferably, determination module 10 may further include: the second setting unit 128, is frame for arranging the unit of the 3rd judgement cycle T 3, T3; Judging unit 130, within the 3rd judgement cycle, judges data transmission rate trend according to channel condition information; 8th determining unit 132, for determining that according to data transmission rate trend CDD pattern or SM+CDD pattern are the data transmission modes being suitable for receiving terminal.

In preferred implementation process, the working method that above-mentioned each unit be combined with each other see Figure 11 ~ Figure 17, can repeat no more herein.

In sum, pass through the above embodiment of the present invention, the selection scheme of the antenna data sending mode provided, can according to system channel state information (such as, the change of channel condition and application scenarios), select data transmission modes to be that cyclic delay diversity and spatial reuse cyclic delay diversity are to send data neatly.Thus add the stability of link and improve the throughput of system.

Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (17)

1. a system of selection for antenna data sending mode, is characterized in that, comprising:

Transmitting terminal determines the data transmission modes being suitable for receiving terminal according to channel condition information from cyclic delay diversity CDD pattern and spatial reuse cyclic delay diversity SM+CDD pattern; And

Described transmitting terminal uses described established data sending mode to send data;

Wherein, described transmitting terminal determines that the data transmission modes being suitable for receiving terminal comprises:

The unit arranging the 3rd judgement cycle T 3, T3 is frame;

Within the described 3rd judgement cycle, transmitting terminal judges data transmission rate trend according to channel condition information;

Determine that described CDD pattern or described SM+CDD pattern are the data transmission modes being suitable for receiving terminal according to described data transmission rate trend.

2. method according to claim 1, is characterized in that, described channel condition information comprises signal to noise ratio CINR, and described transmitting terminal determines that the data transmission modes being suitable for receiving terminal comprises:

Determine the signal to noise ratio CINR under described CDD pattern _cDDcorresponding order of modulation M _cDD, code rate P _cDD, coding number of repetition R _cDD, and calculate the transmission rate V under described CDD pattern _cDD=M _cDD× P _cDD÷ R _cDD;

Determine the signal to noise ratio CINR under described SM+CDD pattern _sMCDDcorresponding order of modulation M _sMCDD, code rate P _sMCDD, coding number of repetition R _sMCDD, and calculate the transmission rate V under described SM+CDD pattern _sMCDD=α × M _sMCDD× P _sMCDD÷ R _sMCDD, wherein, code rate when α is spatial reuse ring delay diversity;

At described V _cDDwith described V _sMCDDin determine the greater, and determine that the data transmission modes that described the greater is corresponding is the data transmission modes being suitable for receiving terminal.

3. method according to claim 1, is characterized in that, described channel condition information comprises the information of spatial coherence, and described spatial coherence is by the conditional number of channel correlation matrix represent, described transmitting terminal determines that the data transmission modes being suitable for receiving terminal comprises:

Calculate described in obtaining

If greater than condition number threshold value time, determine that described SM+CDD pattern is the data transmission modes being suitable for receiving terminal, otherwise, determine that described CDD pattern is the data transmission modes being suitable for receiving terminal.

4. method according to claim 3, is characterized in that, calculates in the following manner described in obtaining

or or wherein, described tr (R) represents the mark of channel relevancy matrix R, λ _maxand λ (R) _min(R) eigenvalue of maximum and the minimal eigenvalue of described R is represented respectively;

Described R calculates in the following manner: wherein, N _crepresent the number carrier set that is used for calculating channel relevancy matrix comprising carrier wave, $H\left(k\right)=\left[\begin{array}{cccc}{h}_{11}\left(k\right)& h_{12}\left(k\right)& ...& h_{1M}\left(k\right)\\ .& .& .& .\\ .& .& .& .\\ .& .& .& .\\ h_{N1}\left(k\right)& h_{N2}\left(k\right)& ...& h_{\mathrm{NM}}\left(k\right)\end{array}\right]$ And α _k>=0 is channel coefficient matrix and the proportionality coefficient of a kth subcarrier in described carrier set respectively, h _ijk () is the channel coefficients on the kth carrier wave between jth root transmitting antenna to i root reception antenna, j=1 ..., M, i=1 ..., N, M are actual physics transmitting antenna number or virtual-antenna number, and N is reception antenna number.

5. method according to claim 1, is characterized in that, described channel condition information comprises sends out rate BER by mistake, and described transmitting terminal determines that the data transmission modes being suitable for receiving terminal comprises:

The unit arranging the first judgement cycle T 1, T1 is frame;

The BER of described receiving terminal feedback is obtained within the judgement cycle, or the BER under utilizing mixed automatic retransfer or autonomous retransmission to calculate current data sending mode;

If described BER is less than send out rate threshold value B ER by mistake ₀, then determine that described SM+CDD pattern is the data transmission modes being suitable for receiving terminal, otherwise determine that described CDD pattern is the data transmission modes being suitable for receiving terminal.

6. method according to claim 1, is characterized in that, described channel condition information comprises: BER and CINR, and described transmitting terminal determines that the data transmission modes being suitable for receiving terminal comprises:

To the receiving terminal using described CDD pattern, obtain the CINR under described CDD pattern, if CINR is greater than the first signal-noise ratio threshold value CDD_TH ₀, then determine that described SM+CDD pattern is the data transmission modes being suitable for receiving terminal, otherwise, determine that described CDD pattern is the data transmission modes being suitable for receiving terminal;

To the receiving terminal using described SM+CDD pattern, obtain the BER of this receiving terminal feedback, or the BER under utilizing mixed automatic retransfer or autonomous retransmission to calculate current data sending mode, if BER is greater than send out rate threshold value B ER by mistake ₀, determine that described CDD pattern is the data transmission modes being suitable for receiving terminal, otherwise, determine that described SM+CDD pattern is the data transmission modes being suitable for receiving terminal.

7. the method according to any one of claim 2 to 6, is characterized in that, described channel condition information comprises CINR, and described transmitting terminal determines that the data transmission modes being suitable for receiving terminal comprises:

First thresholding interval [CDD_TH1 is set, CDD_TH2], to the receiving terminal using described CDD pattern, calculate the CINR under described CDD pattern, if CINR<CDD_TH1, then determine that described CDD pattern is the data transmission modes being suitable for receiving terminal; If CINR>CDD_TH2, then determine that described SM+CDD pattern is the data transmission modes being suitable for receiving terminal; If described CINR is arranged in described first thresholding interval, enforcement of rights requires that the determination described in any one of 2-6 is suitable for the step of the data transmission modes of receiving terminal, determines that described CDD pattern or described SM+CDD pattern are the data transmission modes being suitable for receiving terminal;

Second threshold value interval [SMCDD_TH1, SMCDD_TH2] is set, to the receiving terminal using described SM+CDD pattern, the CINR under the multiplexing cdd mode of computer memory; If CINR<SMCDD_TH1, then determine that described CDD pattern is the data transmission modes being suitable for receiving terminal; If CINR>SMCDD_TH2, then determine that described SM+CDD pattern is the data transmission modes being suitable for receiving terminal; If described CINR is arranged in described second threshold value interval, then enforcement of rights requires that the transmitting terminal described in any one of 2-6 determines the data transmission modes being suitable for receiving terminal, determines that described CDD pattern or described SM+CDD pattern are the data transmission modes being suitable for receiving terminal.

8. the method according to any one of claim 2 to 6, is characterized in that, described transmitting terminal determines that the data transmission modes being suitable for receiving terminal comprises:

The unit arranging the second judgement cycle T 2, T2 is frame;

In the described second judgement cycle, L determination point is set, wherein, L be more than or equal to 1 integer;

Require that the determination described in any one of 2-6 is suitable for the step of the data transmission modes of receiving terminal in each described determination point enforcement of rights, determine that described CDD pattern or described SM+CDD pattern are the data transmission modes being suitable for receiving terminal, and add up the times N 1 that described CDD pattern is the data transmission modes being suitable for receiving terminal, or add up the times N 2 that described SM+CDD pattern is the data transmission modes being suitable for receiving terminal;

If N1/L is more than or equal to predetermined value Tr, determine that described CDD pattern is the data transmission modes being suitable for receiving terminal, otherwise, determine that described SM+CDD pattern is the data transmission modes being suitable for receiving terminal;

If N2/L is more than or equal to predetermined value Tr, determine that described SM+CDD pattern is the data transmission modes being suitable for receiving terminal, otherwise, determine that described CDD pattern is the data transmission modes being suitable for receiving terminal.

9. method according to claim 7, is characterized in that, described transmitting terminal determines that the data transmission modes being suitable for receiving terminal comprises:

The unit arranging the second judgement cycle T 2, T2 is frame;

In the described second judgement cycle, L determination point is set, wherein, L be more than or equal to 1 integer;

Require that the determination described in 7 is suitable for the step of the data transmission modes of receiving terminal in each described determination point enforcement of rights, determine that described CDD pattern or described SM+CDD pattern are the data transmission modes being suitable for receiving terminal, and add up the times N 1 that described CDD pattern is the data transmission modes being suitable for receiving terminal, or add up the times N 2 that described SM+CDD pattern is the data transmission modes being suitable for receiving terminal;

If N1/L is more than or equal to predetermined value Tr, determine that described CDD pattern is the data transmission modes being suitable for receiving terminal, otherwise, determine that described SM+CDD pattern is the data transmission modes being suitable for receiving terminal;

If N2/L is more than or equal to predetermined value Tr, determine that described SM+CDD pattern is the data transmission modes being suitable for receiving terminal, otherwise, determine that described CDD pattern is the data transmission modes being suitable for receiving terminal.

10. method according to claim 1, is characterized in that, described channel condition information comprises CINR, according to channel condition information, transmitting terminal judges that data transmission rate trend comprises:

Multiple determination point is set within the described 3rd judgement cycle, the CINR successively under each described determination point obtains current data sending mode, and adds up CINR>=CINR in the described 3rd judgement cycle ₀times N _s, described CINR ₀it is the second signal-noise ratio threshold value;

If N _s≤ N ₁, then determine that described data transmission rate trend is for declining, described N ₁be first number threshold value; If N _s>=N ₂, then determine that described data transmission rate trend is for rising, described N ₂be second number threshold value; If N ₁<N _s<N ₂, then determine that described data transmission rate trend is constant.

11. methods according to claim 1, is characterized in that, described channel condition information comprises BER, according to channel condition information, transmitting terminal judges that data transmission rate trend comprises:

3rd judgement cycle was divided into multiple minor cycle;

The BER of described receiving terminal feedback is obtained successively within each described minor cycle, or the BER under utilizing mixed automatic retransfer or autonomous retransmission to calculate current data sending mode;

Add up BER≤BER in the described 3rd judgement cycle ₀times N _s, described BER ₀for sending out rate threshold value by mistake;

If N _s≤ N ₁, then determine that described data transmission rate trend is for declining, described N ₁be first number threshold value; If N _s>=N ₂, then determine that described data transmission rate trend is for rising, described N ₂be second number threshold value; If N ₁<N _s<N ₂, then determine that described data transmission rate trend is constant.

12. methods according to claim 1,10 or 11, is characterized in that, determine that described CDD pattern or described SM+CDD pattern are that the data transmission modes being suitable for receiving terminal comprises according to described data transmission rate trend:

If described transmission rate trend rises, between current data transmission rate and maximum transmission rate, determine that pattern corresponding to data transmission rate is the data transmission modes being suitable for receiving terminal;

If described transmission rate trend declines, between current data transmission rate and minimum transmission rate, determine that pattern corresponding to data transmission rate is the data transmission modes being suitable for receiving terminal;

If described transmission rate trend is constant, keep current data transmission modes constant.

The choice device of 13. 1 kinds of antenna data sending modes, is characterized in that, comprising:

Determination module, for determining the data transmission modes being suitable for receiving terminal according to channel condition information from cyclic delay diversity CDD pattern and spatial reuse cyclic delay diversity SM+CDD pattern;

Sending module, sends data for using described established data sending mode;

Wherein, described determination module comprises:

Second setting unit is frame for arranging the unit of the 3rd judgement cycle T 3, T3;

Judging unit, within the described 3rd judgement cycle, judges data transmission rate trend according to channel condition information;

8th determining unit, for determining that according to described data transmission rate trend described CDD pattern or described SM+CDD pattern are the data transmission modes being suitable for receiving terminal.

14. devices according to claim 13, is characterized in that, described determination module comprises:

First determining unit, for determining the signal to noise ratio CINR under described CDD pattern _cDDcorresponding order of modulation M _cDD, code rate P _cDD, coding number of repetition R _cDD;

First computing unit, for calculating the transmission rate V under described CDD pattern _cDD=M _cDD× P _cDD÷ R _cDD;

Second determining unit, for determining the signal to noise ratio CINR under described SM+CDD pattern _sMCDDcorresponding order of modulation M _sMCDD, code rate P _sMCDD, coding number of repetition R _sMCDD;

Second computing unit, for calculating the transmission rate V under described SM+CDD pattern _sMCDD=α × M _sMCDD× P _sMCDD÷ R _sMCDD, wherein, code rate when α is spatial reuse ring delay diversity;

3rd determining unit, at described V _cDDwith described V _sMCDDin determine the greater, and determine that the data transmission modes that described the greater is corresponding is the data transmission modes being suitable for receiving terminal.

15. devices according to claim 14, is characterized in that, described determination module comprises:

Computing unit, for calculating the conditional number obtaining channel correlation matrix ;

4th determining unit, for greater than condition number threshold value time, determine that described SM+CDD pattern is the data transmission modes being suitable for receiving terminal, otherwise, determine that described CDD pattern is the data transmission modes being suitable for receiving terminal.

16. devices according to claim 14, is characterized in that, described determination module comprises:

First setting unit, for arranging the first judgement cycle T 1, wherein, the unit of T1 is frame;

First acquiring unit, obtains the BER of described receiving terminal feedback, or the BER under utilizing mixed automatic retransfer or autonomous retransmission to calculate current data sending mode;

5th determining unit, sends out rate threshold value B ER for being less than at described BER by mistake ₀time, determine that described SM+CDD pattern is the data transmission modes being suitable for receiving terminal, otherwise determine that described CDD pattern is the data transmission modes being suitable for receiving terminal.

17. devices according to claim 14, is characterized in that, described determination module comprises:

Second acquisition unit, for the receiving terminal using described CDD pattern, obtains the CINR under described CDD pattern;

6th determining unit, for being greater than the first signal-noise ratio threshold value CDD_TH at CINR ₀time, determine that described SM+CDD pattern is the data transmission modes being suitable for receiving terminal, otherwise, determine that described CDD pattern is the data transmission modes being suitable for receiving terminal;

3rd acquiring unit, for the receiving terminal using described SM+CDD pattern, obtains the BER of this receiving terminal feedback, or the BER under utilizing mixed automatic retransfer or autonomous retransmission to calculate current data sending mode;

7th determining unit, sends out rate threshold value B ER for being greater than at BER by mistake ₀time, determine that described CDD pattern is the data transmission modes being suitable for receiving terminal, otherwise, determine that described SM+CDD pattern is the data transmission modes being suitable for receiving terminal.