CN102237915A - Method and device for selecting antenna data transmitting mode - Google Patents

Abstract

The invention discloses a method and device for selecting an antenna data transmitting mode. The method comprises the following steps: a transmitting end determines a data transmitting mode suitable for a receiving end from a cyclic delay diversity (CDD) mode and a spatial multiplexing beam-forming (SM+BF) mode according to channel state information; and the transmitting end transmits antenna data in the determined data transmitting mode. According to the technical scheme provided by the invention, the problem that a suitable data transmitting mode cannot be flexibly selected from the CDD mode or the SM+BF mode for transmitting data according to the system channel condition in relevant technologies is solved, so that the link stability is enhanced, and the system throughput is increased.

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

(Beamforming BF) is based on the adaptive antenna principle to wave beam forming, utilizes aerial array to pass through advanced signal processing algorithm respectively to a kind of technology of each antenna element weighted.As shown in Figure 1.Data flow sends after multiply by weights on the corresponding physical antenna, and all physical antennas are equivalent to a virtual-antenna.

(Spatial Multiplexing is to have a plurality of antennas simultaneously at transmitting terminal and receiving terminal SM) to spatial reuse, 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 M root transmitting antenna and N root reception antenna, every physical antenna of transmitting terminal sends different modulation symbols.The combination of spatial reuse and wave beam forming forms a kind of new transmission data method, cry the spatial reuse wave beam forming (Spatial Multiplexing Beamforming, SM+BF).

Cyclic delay diversity (Cyclic Delay Diversity, CDD) be OFDM (Orthogonal Frequency Division Multiplexing, OFDM) lining a kind of many antenna transmission diversity scheme commonly used, it sends identical frequency domain data and the OFDM symbol of time domain is carried out different circulation delays on each physical antenna, obtain the frequency diversity gain with this.Its transmitting terminal schematic diagram as shown in Figure 3, information source through chnnel coding, modulation after, (Inverse Fast Fourier Transform IFFT) becomes time domain data, and with the circulation delay δ of corresponding physical antenna through inverse Fourier transform _iAfter carrying out corresponding circulation delay, (Cyclic Prefix CP) sends to add Cyclic Prefix.Here, i=1 ..., Tx, Tx are transmitting terminal physical antenna number, δ ₁Be generally 0.The entire antenna group is equivalent to a virtual-antenna.

In general, cyclic delay diversity can only send a symbol on the same carrier wave of different physical antenna of the same moment, and signal to noise ratio is generally than higher, and available high order modulation coded system improves throughput; Its covering is bigger.The spatial reuse wave beam forming constantly can send a plurality of different symbols on the same carrier wave on the different virtual antenna at one, and throughput is generally bigger, but covers smallerly, and its performance can be subjected to the weights accuracy of wave beam forming and the influence of instantaneity.Along with the variation of receiving terminal position or channel condition, use cyclic delay diversity better sometimes, the multiplexing wave beam forming 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

At the scheme of in cyclic delay diversity and spatial reuse wave beam forming, selecting data transmission modes in the correlation technique owing to shortage, can't the present invention be proposed according to the problem that channel condition selects data transmission modes to increase link stability and lifting throughput flexibly, for this reason, main purpose of the present invention is to provide a kind of system of selection and device of improved antenna data sending mode, to address the above problem.

According to an aspect of the present invention, a kind of system of selection of antenna data sending mode is provided, has comprised: transmitting terminal determines to be suitable for the data transmission modes of receiving terminal from cyclic delay diversity CDD pattern and spatial reuse wave beam forming SM+BF pattern according to channel condition information; And transmitting terminal uses established data sending mode transmitting antenna data.

According to another aspect of the present invention, a kind of choice device of antenna data sending mode is provided, comprise: determination module is used for determining to be suitable for from cyclic delay diversity CDD pattern or spatial reuse wave beam forming SM+BF pattern according to channel condition information the data transmission modes of receiving terminal; Sending module is used to use the established data sending mode to send data.

By the present invention, transmitting terminal determines that according to channel condition information cyclic delay diversity CDD pattern or spatial reuse wave beam forming SM+BF pattern are the data transmission modes that is suitable for receiving terminal, thereby uses the data transmission modes transmitting antenna data that are fit to.Having solved in the correlation technique to select the suitable data sending mode to send data from CDD pattern or SM+BF pattern according to the system channel condition neatly.Utilize technique scheme, increased the stability and the throughput that has improved system of link.

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

Description of drawings

Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:

Fig. 1 is a BF transmitting terminal schematic diagram in the correlation technique;

Fig. 2 is a SM+BF transmitting terminal schematic diagram in the correlation technique;

Fig. 3 is a CDD transmitting terminal schematic diagram in the correlation technique;

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

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

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

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

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

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

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

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

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

Figure 13 is the flow chart according to second system of selection of the sending mode of the embodiment of the invention eight;

Figure 14 is the flow chart according to the system of selection of the sending mode of the embodiment of the invention nine;

Figure 15 is the flow chart according to the system of selection of the sending mode of the embodiment of the invention ten;

Figure 16 is the flow chart according to the system of selection of the sending mode of the embodiment of the invention 11;

Figure 17 is the flow chart according to the system of selection of the sending mode of the embodiment of the invention 12;

Figure 18 is the flow chart according to the system of selection of the sending mode of the embodiment of the invention 13;

Figure 19 is the flow chart according to the system of selection of the sending mode of the embodiment of the invention 14;

Figure 20 is the flow chart according to the system of selection of the sending mode of the embodiment of the invention 15;

Figure 21 is the flow chart according to the system of selection of the sending mode of the embodiment of the invention 16;

Figure 22 is the structured flowchart according to the choice device of the antenna data sending mode of embodiment 17.

Embodiment

Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.

Wireless communication system comprises transmitting terminal and receiving terminal, and the transmitting terminal in the embodiment of the invention is the equipment that is used to send data or information, such as macro base station, and little base station etc.; Receiving terminal is each Terminal Type that is used to receive data or information, as travelling carriage, handheld device or data card etc.Introducing each embodiment of the present invention below is that the basis is implemented with this wireless communication system all.

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

Determining step S402: transmitting terminal determines to be suitable for the data transmission modes of receiving terminal from cyclic delay diversity CDD pattern and spatial reuse wave beam forming SM+BF pattern according to channel condition information; And

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

In the correlation technique, owing to lack the scheme of in CDD pattern and SM+BF pattern, selecting data transmission modes, can't select data transmission modes to increase link stability and to promote throughput flexibly according to channel condition information, the technical scheme that adopts the foregoing description to provide, can be according to weights information or system channel condition, from CDD pattern or SM+BF pattern, select the suitable data sending mode to send data neatly, increased the stability and the throughput that has improved system of link.

In wireless communication system, above-mentioned channel condition information can include but not limited to following one of at least: weights correlation information, weights range information, signal to noise ratio CINR, mistake are sent out the information of rate BER and spatial coherence.

Wherein, mistake is sent out rate BER for mistake burst rate or bit error rate, feeds back to transmitting terminal by receiving terminal; Perhaps, transmitting terminal comprises the BER under the cyclic delay diversity data transmission modes by calculating _CDDOr the BER under the spatial reuse wave beam forming data transmission modes _SMBF, BER can but be not limited to obtain by the following method:

In the judgement cycle or judgement one of the cycle specify in the minor cycle, the burst number that the statistics transmitting terminal sends altogether is M _TotalIndividual, the corresponding bit number is B _TotalBit, automatically retransmit (Automatic Repeat reQuest, ARQ) or mix automatically and retransmit that (HybridAutomatic Repeat reQuest, HARQ) the first burst number that retransmits is M _RepIndividual, corresponding bit number B _RepBit, then Dui Ying mistake burst rate is BER=M _Rep/ M _Total, perhaps send out rate BER=B by mistake _Rep/ B _Total

Wherein, information signal to noise ratio CINR comprises the CINR under the cyclic delay diversity data transmission modes _CDDOr the CINR under the spatial reuse wave beam forming data transmission modes _SMBFIt can be receiving terminal calculating and feed 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

Expression, Computational process as follows:

(1) the previous channel relevancy matrix of initialization R _Pre, repeated execution of steps (2) finishes up to period T in selected period T.

(2) in period T,, calculate the active user and in frame structure, be used for channel relevancy matrix on the carrier set of calculating channel correlation matrix according to time sequencing:

Here, N _cRepresent to comprise on the above-mentioned carrier set number of carrier wave,

And α _k〉=0 is respectively the channel coefficient matrix and the proportionality coefficient of k subcarrier in the above-mentioned carrier set.h _Ij(k) channel coefficients that is j root transmitting antenna to k the carrier wave between i root reception antenna, j=1 ..., M, i=1 ..., N, M are actual physics transmitting antenna number or virtual-antenna number, N is the reception antenna number.

Previous channel relevancy matrix update is R _Pre=ρ R _Pre+ (1-ρ) R, ρ is constant and 0≤ρ≤1.

(3) conditional number of the previous channel correlation matrix of calculating:

Wherein, f be one about correlation matrix R _PreProcessing, be preferably:

$f\left(R_{\mathrm{Pre}}\right)=\frac{{\mathrm{\λ}}_{\min }\left(R_{\mathrm{Pre}}\right)}{\mathrm{tr}\left(R_{\mathrm{Pre}}\right)}$ Perhaps $f\left(R_{\mathrm{Pre}}\right)=\frac{{\mathrm{\λ}}_{\min }\left(R_{\mathrm{Pre}}\right)}{{\mathrm{\λ}}_{\max }\left(R_{\mathrm{Pre}}\right)}$ Perhaps f (R _Pre)=λ _Min(R _Pre)

Wherein, the mark of tr (A) representing matrix A, subscript H represents matrix is asked common transposition in distress.λ _Max(R _Pre), λ _Min(R _Pre) be respectively matrix R _PreMinimum and maximum characteristic value.

Below by other embodiment said method is described in detail, following examples contain transmitting terminal sends out the information of rate BER or spatial coherence according to weights correlation information, weights range information, signal to noise ratio CINR, mistake, and multiple channel condition information combines and determines to be suitable for the data transmission modes of receiving terminal.

Embodiment one

In the present embodiment, transmitting terminal determines to be suitable for the data transmission modes of receiving terminal according to the weights correlation information, and in this embodiment, the threshold value that statistical variable is set is Num1.The judgement cycle is T, and unit is a frame.Fig. 5 is the flow chart according to the system of selection of the sending mode of the embodiment of the invention one.As shown in Figure 5, each receiving terminal to the transmitting terminal service carries out following processing to select the multi-antenna technology pattern in each cycle:

Step S502, the previous weights correlation of initialization WR _Pre=α, wherein, α is the constant greater than 0; Statistical variable N _S1=0;

Step S504, according to the time sequencing of frame, transmitting terminal obtains weights W ₁, according to the time sequencing of frame, transmitting terminal calculates the next up-to-date weights W of receiving terminal ₂, then adjacent twice weights correlation of receiving terminal correspondence is WR _Cur=f (W ₁, W ₂), wherein, f is to weights W ₁, W ₂Processing, be preferably f (W ₁, W ₂)=|| W ₁ ^H* W ₂||.Wherein, H is the conjugate transpose of matrix, || W ₁ ^H* W ₂|| representing matrix W ₁ ^H* W ₂Norm.And previous weights correlation is updated to WR _Pre=ρ WR _Pre+ (1-ρ) WR _Cur, ρ is constant and 0≤ρ≤1.And with weights W ₂Value compose to W ₁

With WR _PreCompare with the threshold T r of configuration, if WR _Pre〉=T _r, statistic Ns then ₁Add 1;

Execution in step S504 finishes or Ns up to period T repeatedly ₁〉=Num ₁

If step S506 is Ns ₁〉=Num ₁, select the SM+BF data transmission modes, otherwise, the CDD data transmission modes selected.

Step S508 sends data with selected data transmission modes.

Embodiment two

In the present embodiment, transmitting terminal determines to be suitable for the data transmission modes of receiving terminal according to the weights range information, and in this embodiment, the threshold value that statistical variable is set is Num ₂The judgement cycle is T, and unit is a frame.Fig. 6 is the flow chart according to the system of selection of the sending mode of the embodiment of the invention two.As shown in Figure 6, each receiving terminal to the transmitting terminal service carries out following processing to select the multi-antenna technology pattern in each cycle:

Step S602, the previous weights distance D of initialization _Pre=α, here, α is the constant greater than 0; Statistical variable Ns ₂=0;

Step S604, according to the time sequencing of frame, transmitting terminal obtains weights W ₁, according to the time sequencing of frame, transmitting terminal calculates the next up-to-date weights W of receiving terminal ₂, then the distance of adjacent twice weights of receiving terminal correspondence is D _Cur=d (W ₁, W ₂), here, d is to weights W ₁, W ₂Processing, be preferably:

$d({\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="HSA00000082215300062.png,HSA00000082215300081.png"\; state="\{\{state\}\}">W</figure-callout>}}_1,W_2)={\mathrm{\&lambda;}}_{\max }(W_1{W}_1^H-W_2{W}_2^H),$

$d({\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="HSA00000082215300062.png,HSA00000082215300081.png"\; state="\{\{state\}\}">W</figure-callout>}}_1,W_2)={\mathrm{\&Sigma;}}_{k=1}^{\mathrm{Tx}}{\mathrm{\&Sigma;}}_{h=1}^M{|w_{k,h}^{\left(1\right)}-w_{k,h}^{\left(2\right)}|}^p,$

$d({\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="HSA00000082215300062.png,HSA00000082215300081.png"\; state="\{\{state\}\}">W</figure-callout>}}_1,W_2)={\left({\mathrm{\&Sigma;}}_{k=1}^{\mathrm{Tx}}{\mathrm{\&Sigma;}}_{h=1}^M{|w_{k,h}^{\left(1\right)}-w_{k,h}^{\left(2\right)}|}^p\right)}^{\frac{1}{p}},$

$d({\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="HSA00000082215300062.png,HSA00000082215300081.png"\; state="\{\{state\}\}">W</figure-callout>}}_1,W_2)=\max \{{|{\mathrm{<figure-callout\; id="1"\; label="w"\; filenames="HSA00000082215300062.png,HSA00000082215300081.png"\; state="\{\{state\}\}">w</figure-callout>}}_{\mathrm{1,1}}^{\left(1\right)}-{\mathrm{<figure-callout\; id="1"\; label="w"\; filenames="HSA00000082215300062.png,HSA00000082215300081.png"\; state="\{\{state\}\}">w</figure-callout>}}_{\mathrm{1,1}}^{\left(2\right)}|}^p,...,{|w_{\mathrm{Tx},M}^{\left(1\right)}-w_{\mathrm{Tx},M}^{\left(2\right)}|}^p\},$

Wherein, λ _Max(W ₁W ₁H-W ₂W ₂ ^H) representing matrix W ₁W ₁ ^H-W ₂W ₂ ^HEigenvalue of maximum,

With

Be the beam shape-endowing weight value of described current receiving terminal, w _{M, l} ⁽¹⁾, w _{M, l} ⁽²⁾Be the weights component of the different m root constantly of described current receiving terminal transmitting antenna to l wave beam; M=1,2 ..., Tx, l=1,2 ..., M, Tx are the number of all physical antennas of described transmitting terminal, and M is the number of all wave beams of all antenna transmission of described transmitting terminal, and p is the constant greater than 0;

Previous weights distance is updated to D _Pre=ρ D _Pre+ (1-ρ) D _Cur, ρ is constant and 0≤ρ≤1.And with weights W ₂Value compose to W ₁

With D _PreCompare with threshold value Dr, if D _Pre〉=D _r, statistic Ns then ₂Add 1;

Execution in step S604 finishes or Ns up to period T repeatedly ₂〉=Num ₂, Num ₂Threshold value for configuration.

If step S606 is Ns ₂〉=Num ₂, select data transmission modes CDD, otherwise, data transmission modes SM+BF selected;

Step S608 sends data with selected data transmission modes.

Embodiment three

In the present embodiment, transmitting terminal determines to be suitable for the data transmission modes of receiving terminal according to transmission rate, and wherein, transmission rate is by the signal to noise ratio CINR under the CDD pattern _CDDAnd/or the signal to noise ratio CINR under the SM+BF pattern _SMBFInformation is determined.

Fig. 7 is the flow chart according to the system of selection of the data transmission modes of the embodiment of the invention three.As shown in Figure 7, transmitting terminal carries out following processing to all receiving terminals of its service:

Step S702 calculates the signal to noise ratio CINR of this receiving terminal under cyclic delay diversity _CDD, and, find the order of modulation M that is fit to the modulation coding mode correspondence under this signal to noise ratio with its lattice of tabling look-up _CDD, code rate P _CDD, number of repetition R _CDD, and the transmission rate that computation cycles postpones under the diversity data transmission modes is V _CDD=M _CDD* P _CDD/ R _CDD

Step S704 calculates the CINR of receiving terminal under spatial reuse wave beam forming data transmission modes _SMBF, and, find the pairing order of modulation M of its modulation coding mode with its lattice of tabling look-up _SMBF, code rate P _SMBF, coding number of repetition R _SMBFAnd the transmission rate V under the multiplexing wave beam forming data transmission modes of computer memory _SMBF=α _SMBF* M _SMBF* P _SMBF/ R _SMBFα wherein _SMBFMIMO code rate during for spatial reuse.

Step S706, relatively V _CDD, V _SMBFIf, V _CDD〉=V _SMBF, select cdd mode, otherwise select the spatial reuse beam-forming mode.

Step S708 uses selected data transmission modes to send the data of this receiving terminal.

Embodiment four

In the present embodiment, transmitting terminal determines to be suitable for the data transmission modes of receiving terminal according to the information of spatial coherence, and Fig. 8 is the flow chart according to the system of selection of the sending mode of the embodiment of the invention four.As shown in Figure 8, each receiving terminal to the transmitting terminal service carries out following processing to select the multi-antenna technology pattern in each cycle:

Step S802, the previous channel relevancy matrix of initialization R _Pre, repeated execution of steps S804 finishes up to period T in selected period T.

Step S804, in period T, according to time sequencing, calculate the active user and be used for channel relevancy matrix on the carrier set of calculating channel correlation matrix in frame structure:

Here, N _cRepresent to comprise on the above-mentioned carrier set number of carrier wave,

And α _k〉=0 is respectively the channel coefficient matrix and the proportionality coefficient of k subcarrier in the above-mentioned carrier set.h _Ij(k) channel coefficients that is j root transmitting antenna to k the carrier wave between i root reception antenna, j=1 ..., M, i=1 ..., N, M are actual physics transmitting antenna number or virtual-antenna number, N is the reception antenna number.

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

Previous channel relevancy matrix update is R _Pre=ρ R _Pre+ (1-ρ) R, ρ is constant and 0≤ρ≤1.

Step S806, calculate the conditional number of previous channel relevancy matrix:

Wherein, f be one about correlation matrix R _PreProcessing, be preferably:

$f\left(R_{\mathrm{Pre}}\right)=\frac{{\mathrm{\&lambda;}}_{\min }\left(R_{\mathrm{Pre}}\right)}{\mathrm{tr}\left(R_{\mathrm{Pre}}\right)}$ Perhaps $f\left(R_{\mathrm{Pre}}\right)=\frac{{\mathrm{\&lambda;}}_{\min }\left(R_{\mathrm{Pre}}\right)}{{\mathrm{\&lambda;}}_{\max }\left(R_{\mathrm{Pre}}\right)}$ Perhaps f (R _Pre)=λ _Min(R _Pre)

Wherein, the mark of tr (A) representing matrix A, subscript H represents matrix is asked common transposition in distress.λ _Max(R _Pre), λ _Min(R _Pre) be respectively matrix R _PreMinimum and maximum characteristic value.Step S808, if

Select the spatial reuse beam-forming mode, otherwise select cdd mode.

Step S810 uses selected data transmission modes to send the data of this receiving terminal.

Embodiment five

In the present embodiment, transmitting terminal is sent out the data transmission modes that rate BER determines to be suitable for receiving terminal according to mistake, and Fig. 9 is the flow chart according to the system of selection of the sending mode of the embodiment of the invention five.As shown in Figure 9, transmitting terminal predetermined threshold value BER ₀, all receiving terminals of its service are carried out following processing:

Step S902 obtains the BER of receiving terminal feedback, or utilizes the BER under HARQ or the ARQ calculating current data sending mode;

If step S904 is BER＜BER ₀, select the spatial reuse beam-forming mode more excellent, otherwise select cdd mode more excellent.

Step S906 sends data with selected more excellent data transmission modes.

Embodiment six

In the present embodiment, transmitting terminal is sent out rate BER, the signal to noise ratio CINR under the CDD pattern according to mistake _CDD, determining to be suitable for the data transmission modes of receiving terminal, Figure 10 is the flow chart according to the system of selection of the sending mode of the embodiment of the invention six.As shown in figure 10, transmitting terminal preestablishes a signal-noise ratio threshold value CDD_TH1 and a threshold value mistake rate threshold value B ER ₀, all receiving terminals of its service are carried out following processing:

Step S1002 to the receiving terminal of current usage space diversity cdd mode, obtains the CINR under the CDD pattern _CDDIf, CINR _CDD＞CDD_TH1 determines that then the spatial reuse beam-forming mode is more excellent; Otherwise, determine that cdd mode is more excellent.

Step S1004 to the receiving terminal of the multiplexing beam-forming mode of current usage space, obtains the BER of receiving terminal feedback _SMBF, or utilize HARQ or ARQ to calculate BER under the current data sending mode _SMBFIf BER _SMBF＞BER ₀, select cdd mode more excellent, otherwise select the spatial reuse beam-forming mode more excellent.

Step S1006: send data with selected more excellent data transmission modes.

Embodiment seven

In the present embodiment, transmitting terminal is sent out rate BER, the signal to noise ratio CINR under the CDD pattern according to mistake _CDDAnd the signal to noise ratio CINR under the SM+BF pattern _SMBF, determining to be suitable for the data transmission modes of receiving terminal, Figure 11 is the flow chart according to the system of selection of the sending mode of the embodiment of the invention seven.As shown in figure 11, transmitting terminal preestablishes interval threshold value [CDD_TH1, CDD_TH2] and [SMBF_TH1, SMBF_TH2].Wherein, 0≤CDD_TH1≤CDD_TH2,0≤SMBF_TH1≤SMBF_TH2, transmitting terminal carries out following processing to all receiving terminals of its service:

Step S1102, current data receiver formula is the receiving terminal of cdd mode; Calculate the CINR under this pattern _CDDIf, CINR _CDD＜CDD_TH1 determines that then the CDD pattern is more excellent; If CINR _CDD＞CDD_TH2 determines that then SM+BF is more excellent; If CDD_TH1≤CINR _CDD≤ CDD_TH2 then carries out the method for each specified data sending mode among the embodiment three to embodiment six, determines that cdd mode or spatial reuse beam-forming mode are more excellent.

Step S1104, current data receiver formula is the receiving terminal of spatial reuse beam-forming mode; Calculate the CINR under this pattern _SMBFIf, CINR _SMBF＜SMBF_TH1 determines that then the CDD pattern is more excellent; If CINR _SMBF＞SMBF_TH2 determines that then SM+BF is more excellent; If SMBF_TH1≤CINR _SMBF≤ SMBF_TH2 then carries out the method for each specified data sending mode among the embodiment three to embodiment six, determines that cdd mode or spatial reuse beam-forming mode are more excellent.

Step S1106 sends data with selected more excellent data transmission modes.

Embodiment eight

Present embodiment is that of embodiment three to embodiment seven optimizes distortion, and in the present embodiment, above-mentioned determining step can further include following processing:

(1) the second judgement period T 2 is set, the unit of T2 is a frame;

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

(3) carry out the scheme of each determining step above-mentioned at each determination point, determine that CDD pattern or SM+BF pattern are the data transmission modes that is suitable for receiving terminal, and statistics CDD pattern is the times N 1 that is suitable for the data transmission modes of receiving terminal, and perhaps adding up the SM+BF pattern is the times N 2 that is suitable for the data transmission modes of receiving terminal;

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

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

Above-mentioned data transmission modes determines that a preferred scheme of method is as follows:

At judgement L=1 and do judgement during for the integral multiple of period T constantly, transmitting terminal is set the judgement period T, and unit is a frame; All receiving terminals to its service carry out following processing:

When totalframes was the integral multiple of T, adopting the data sending mode of any one method selection among the embodiment three to embodiment seven was cyclic delay diversity or spatial reuse wave beam forming.And in the next judgement cycle, use these mode transfer data.Enter the next judgement cycle.

Above-mentioned data transmission modes determines that another preferred scheme of method is as follows:

Figure 12 is the flow chart according to first system of selection of the sending mode of the embodiment of the invention eight.As shown in figure 12, set threshold T r and judgement period T, in the judgement cycle, set L the judgement moment (determination point), all receiving terminals of its service are carried out following processing:

Step S1202, initialization CDD_NUM=0;

Step S1204 constantly carries out the scheme of embodiment three to embodiment seven arbitrary determining steps in each judgement, if cdd mode is more excellent, and CDD_NUM=CDD_NUM+1 then;

Step S1206, repeated execution of steps S1204 is up to end cycle or CDD_NUM/L 〉=Tr;

Step S1208 if CDD_NUM/L 〉=Tr selects cdd mode more excellent, otherwise selects the spatial reuse beam-forming mode more excellent.

Step S1210 sends data with the more excellent data transmission modes of selection in next cycle.Enter the next judgement cycle.

Above-mentioned data transmission modes determines that another preferred scheme of method is as follows:

Figure 13 is the flow chart according to second system of selection of the sending mode of the embodiment of the invention eight.As shown in figure 13, set threshold T r and judgement period T, in the judgement cycle, set L the judgement moment (determination point), all receiving terminals of its service are carried out following processing:

Step S1302, initialization SMBF_NUM=0;

Step S1304 constantly carries out the scheme of embodiment three to embodiment seven arbitrary determining steps in each judgement, if the spatial reuse beam-forming mode is more excellent, and SMBF_NUM=SMBF_NUM+1 then;

Step S1306, repeated execution of steps S1304 is up to end cycle or SMBF_NUM/L 〉=Tr;

Step S1308 if SMBF_NUM/L 〉=Tr selects the spatial reuse beam-forming mode more excellent, otherwise selects cdd mode more excellent.

Step S1310 sends data with the more excellent data transmission modes of selection in next cycle.Enter the next judgement cycle.

Embodiment nine

In the present embodiment, transmitting terminal is sent out rate BER judgment data transmission rate trend according to mistake, and determines that according to speed trend CDD pattern or SM+BF pattern are the data transmission modes that is suitable for receiving terminal.

In the present embodiment, a Speedometer Drive is set at first by the following method: in the time of will using cyclic delay diversity during the multiplexing wave beam forming of the transmission rate of different modulating coded system correspondence and usage space the transmission rate of different modulating coded system correspondence sort, form a form, and the direction that the regulation transmission rate increases is the direction that speed rises, and the direction that transmission rate reduces is the direction that speed descends.Each row in the form comprises data transmission modes, modulation coding mode, transmission rate and unique index ID (Index).An example in the form, is arranged by transmission rate as shown in Table 1 from small to large.Coding number of repetition R=1, α during cyclic delay diversity=1, α during the spatial reuse wave beam forming=2.Modulation system comprises QPSK (Quadrature Phase Shift Keying), QAM (Quadrature AmplitudeModulation), 16QAM, 64QAM, and code rate comprises 1/2,2/3,3/4,5/6.

Form 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
The spatial reuse wave beam forming	QPSK?1/2	2	4
				Cyclic delay diversity	64QAM?1/2	3	5
The spatial reuse wave beam forming	QPSK?3/4	3	6
				Cyclic delay diversity	64QAM?2/3	4	7
The spatial reuse wave beam forming	16QAM?1/2	4	8
				Cyclic delay diversity	64QAM?3/4	4.5	9
Cyclic delay diversity	64QAM?5/6	5	10
				The spatial reuse wave beam forming	64QAM?1/2	6	11
The spatial reuse wave beam forming	64QAM?2/3	8	12
				The spatial reuse wave beam forming	64QAM?3/4	9	13
The spatial reuse wave beam forming	64QAM?5/6	10	14

In the present embodiment, a plurality of receiving terminals have been served below the transmitting terminal.At transmitting terminal end configuration judgement cycle N _TT, the unit of T is a 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 ₂The configured rate table, as shown in Table 1.

Figure 14 is the flow chart according to the system of selection of the sending mode of the embodiment of the invention nine.As shown in figure 14, transmitting terminal carries out following processing to all receiving terminals of its service:

Step S1402, if adjust for the first time, initialization ID=1, that is, selecting cyclic delay diversity data transmission modes and modulating-coding method mode is QPSK1/2 transmission data, otherwise ID is the last value of adjusting, i=1.

Step S1404 is M in (i-1) T+1 burst number that the statistics transmitting terminal sends altogether in the cycle of iT _TotalIndividual, the corresponding bit number is B _TotalBit, the burst number that HARQ or AQR first retransmit is M _RepIndividual, corresponding bit number B _RepBit, then bit error rate BER=B _Rep/ B _Total

Step S1406, i=i+1; If BER≤BER ₀, N _s=N _s+ 1.

Step S1408, repeating step S1404～S1406 is up to judgement end cycle or N _s〉=N ₂

If step S1410 is N _s〉=N ₂, judge that this receiving terminal transmission rate trend rises, ID=min (ID+1,14); If N _s≤ N ₁, judgement descends, and ID=max (1, ID-1); If N ₁＜N _s＜N ₂, keep message transmission rate constant, ID=ID.

Step S1412 uses the data transmission modes of the ID correspondence of step S1410 selection to send data.

Need to prove that the method that present embodiment is used can be BER=M with mistake burst rate also _Rep/ M _TotalRealize.

Embodiment ten

In the present embodiment, transmitting terminal is sent out rate BER judgment data transmission rate trend according to mistake, and determines that according to speed trend CDD pattern or SM+BF pattern are the data transmission modes that is suitable for receiving terminal.

In the present embodiment, a plurality of receiving terminals have been served below the transmitting terminal.At transmitting terminal end configuration judgement cycle N _TT, the unit of T is a 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 ₂The configured rate table, as shown in Table 1.

Figure 15 is the flow chart according to the system of selection of the sending mode of the embodiment of the invention ten.As shown in figure 15, transmitting terminal carries out following processing to all receiving terminals of its service:

Step S1502, if adjust for the first time, initialization ID=1, that is, selecting cyclic delay diversity data transmission modes and modulating-coding method mode is QPSK1/2 transmission data, otherwise ID is the last value of adjusting, i=1.

Step S1504 is M in (i-1) T+1 burst number that the statistics transmitting terminal sends altogether in the cycle of iT _TotalIndividual, the corresponding bit number is B _TotalBit, the burst number that HARQ or AQR first retransmit is M _RepIndividual, corresponding bit number B _RepBit, then bit error rate BER=B _Rep/ B _Total

Step S1506, i=i+1; If BER 〉=BER ₀, N _s=N _s+ 1.

Step S1508, repeating step S1504～S1506 is up to judgement end cycle or N _s〉=N ₂

If step S1510 is N _s〉=N ₂, judge that this receiving terminal transmission rate trend descends, and 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 S1512 uses the data transmission modes of the ID correspondence of step S1510 selection to send data.

Need to prove that the method that present embodiment is used can be BER=M with mistake burst rate also _Rep/ M _TotalRealize.

Embodiment 11

In the present embodiment, transmitting terminal is sent out rate BER judgment data transmission rate trend according to mistake, and determines that according to speed trend CDD pattern or SM+BF pattern are the data transmission modes that is suitable for receiving terminal.

In the present embodiment, a plurality of receiving terminals have been served below the transmitting terminal.At transmitting terminal end configuration judgement cycle N _TT, the unit of T is a 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 ₂The configured rate table, as shown in Table 1.

Figure 16 is the flow chart according to the system of selection of the sending mode of the embodiment of the invention 11.As shown in figure 16, transmitting terminal carries out following processing to all receiving terminals of its service:

Step S1602, if adjust for the first time, initialization ID=1, that is, selecting cyclic delay diversity data transmission modes and modulating-coding method mode is QPSK1/2 transmission data, otherwise ID is the last value of adjusting, i=1.

Step S1604 is M in (i-1) T+1 burst number that the statistics transmitting terminal sends altogether in the cycle of iT _TotalIndividual, the corresponding bit number is B _TotalBit, the burst number that HARQ or AQR first retransmit is M _RepIndividual, corresponding bit number B _RepBit, then bit error rate BER=B _Rep/ B _Otal

If step S1606 is BER≤BER ₀, N _s=N _s+ 1.

Step S1608, i=i+1; BER ₀=BER.

Step S1610, repeating step S1604～S1608 is up to judgement end cycle or N _s〉=N ₂

If step S1612 is N _s〉=N ₂, judge that this receiving terminal transmission rate trend rises, ID=min (ID+1,14); If N _s≤ N ₁, judgement descends, and ID=max (1, ID-1); If N ₁＜N _s＜N ₂, keep message transmission rate constant, ID=ID.

Step S1614 uses the data transmission modes of the ID correspondence of step S1612 selection to send data.

Need to prove that the method that present embodiment is used can be BER=M with mistake burst rate also _Rep/ M _TotalRealize.

Embodiment 12

In the present embodiment, transmitting terminal is according to signal to noise ratio CINR judgment data transmission rate trend, and determines that according to speed trend CDD pattern or SM+BF pattern are the data transmission modes that is suitable for receiving terminal.

In the present embodiment, a plurality of receiving terminals have been served below the transmitting terminal.At transmitting terminal end configuration judgement cycle N _TT, the unit of T is a 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 ₂The configured rate table, as shown in Table 1.

Figure 17 is the flow chart according to the system of selection of the sending mode of the embodiment of the invention 12.As shown in figure 17, transmitting terminal carries out following processing to all receiving terminals of its service:

Step S1702, if adjust for the first time, initialization ID=1, that is, selecting cyclic delay diversity data transmission modes and modulating-coding method mode is QPSK1/2 transmission data, otherwise ID is the last value of adjusting.i＝1。

Step S1704 at judgement moment iT, obtains the CINR under the current data sending mode.

Step S1706, i=i+1; If CINR 〉=CINR ₀, N _s=N _s+ 1.

Step S1708, repeating step S1704～S1706 is up to judgement end cycle or N _s〉=N ₂

If step S1710 is N _s〉=N ₂, judge that this receiving terminal transmission rate trend rises, ID=min (ID+1,14); If N _s≤ N ₁, judgement descends, and ID=max (1, ID-1); If N ₁＜N _s＜N ₂, keep message transmission rate constant, ID=ID.

Step S1712 uses the data transmission modes of the ID correspondence of step S1710 selection to send data.

Embodiment 13

In the present embodiment, transmitting terminal is according to signal to noise ratio CINR judgment data transmission rate trend, and determines that according to speed trend CDD pattern or SM+BF pattern are the data transmission modes that is suitable for receiving terminal.

In the present embodiment, a plurality of receiving terminals have been served below the transmitting terminal.At transmitting terminal end configuration judgement cycle N _TT, the unit of T is a 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 ₂The configured rate table, as shown in Table 1.

Figure 18 is the flow chart according to the system of selection of the sending mode of the embodiment of the invention 13.As shown in figure 18, transmitting terminal carries out following processing to all receiving terminals of its service:

Step S1802, if adjust for the first time, initialization ID=1, that is, selecting cyclic delay diversity data transmission modes and modulating-coding method mode is QPSK1/2 transmission data, otherwise ID is the last value of adjusting.i＝1。

Step S1804 at judgement moment iT, obtains the CINR under the current data sending mode.

Step S1806, i=i+1; If CINR≤CINR ₀, N _s=N _s+ 1.

Step S1808, repeating step S1804～S1806 is up to judgement end cycle or N _s〉=N ₂

If step S1810 is N _s〉=N ₂, judge that this receiving terminal transmission rate trend descends, and 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 S1812 uses the data transmission modes of the ID correspondence of step S1810 selection to send data.

Embodiment 14

In the present embodiment, transmitting terminal is according to signal to noise ratio CINR judgment data transmission rate trend, and determines that according to speed trend CDD pattern or SM+BF pattern are the data transmission modes that is suitable for receiving terminal.

In the present embodiment, a plurality of receiving terminals have been served below the transmitting terminal.At transmitting terminal end configuration judgement cycle N _TT, the unit of T is a 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 ₂The configured rate table, as shown in Table 1.

Figure 19 is the flow chart according to the system of selection of the sending mode of the embodiment of the invention 14.As shown in figure 19, transmitting terminal carries out following processing to all receiving terminals of its service:

Step S1902, if adjust for the first time, initialization ID=1, that is, selecting cyclic delay diversity data transmission modes and modulating-coding method mode is QPSK1/2 transmission data, otherwise ID is the last value of adjusting.i＝1。

Step S1904 at judgement moment iT, obtains the CINR under the current data sending mode.

If step S1906 is CINR 〉=CINR ₀, N _s=N _s+ 1.

Step S1908, i=i+1; CINR ₀=CINR.

Step S1910, repeating step S1904～S1908 is up to judgement end cycle or N _s〉=N ₂

If step S1912 is N _s〉=N ₂, judge that this receiving terminal transmission rate trend rises, ID=min (ID+1,14); If N _s≤ N ₁, judgement descends, and ID=max (1, ID-1); If N ₁＜N _s＜N ₂, keep message transmission rate constant, ID=ID.

Step S1914 uses the data transmission modes of the ID correspondence of step S1912 selection to send data.

Embodiment 15

In the present embodiment, channel condition information is divided into two classes, one class is the weights category information relevant with weights, another kind of is non-weights category information, wherein, the weights category information comprises: weights correlation information or weights range information, non-weights category information to comprise following one of at least: signal to noise ratio CINR, mistake are sent out the information of a rate BER, spatial coherence.

In the present embodiment, a plurality of receiving terminals have been served below the transmitting terminal.At needed threshold value of transmitting terminal end configuration mode selection algorithm and various initialization value thereof.Figure 20 is the flow chart according to the system of selection of the sending mode of the embodiment of the invention 15.As shown in figure 20, transmitting terminal carries out following operation to each receiving terminal in each judgement cycle, sends data to select data transmission modes:

Step S2002, the data transmission modes that receiving terminal is provided with weights category information (method that promptly adopts embodiment one or embodiment two to provide) judgement, if selected the CDD pattern, determine that so selecting the CDD pattern is the final data sending mode, and execution in step S2006.Otherwise execution in step S2004.

Step S2004 is with non-weights category information (any method that promptly adopts embodiment three to embodiment 14 to provide) definite final data sending mode that is fit to receiving terminal from data transmission modes CDD and SM+BF.And execution in step S2006.

Step S2006 sends data with selected data transmission modes.

Embodiment 16

In the present embodiment, channel condition information is divided into two classes, one class is the weights category information relevant with weights, another kind of is non-weights category information, wherein, the weights category information comprises: weights correlation information or weights range information, non-weights category information to comprise following one of at least: signal to noise ratio CINR, mistake are sent out the information of a rate BER, spatial coherence.

In the present embodiment, a plurality of receiving terminals have been served below the transmitting terminal.At needed threshold value of transmitting terminal end configuration mode selection algorithm and various initialization value thereof.Figure 21 is the flow chart according to the system of selection of the sending mode of the embodiment of the invention 16.As shown in figure 21, transmitting terminal carries out following operation to each receiving terminal in each judgement cycle, sends data to select data transmission modes:

Step S2102, the data transmission modes that use is provided with non-weights category information (any method that promptly adopts embodiment three to embodiment 14 to provide) judgement, if selected the CDD pattern, determine that so selecting the CDD pattern is the final data sending mode, and execution in step S2106.Otherwise execution in step S2104.

Step S2104, definite final data sending mode that is fit to receiving terminal from data transmission modes CDD and SM+BF with weights correlation information or weights range information (method that promptly adopts embodiment one or embodiment two to provide).And execution in step S2106.

Step S2106 sends data with selected data transmission modes.

Embodiment 17

In the present embodiment, provide a kind of choice device of antenna data sending mode, Figure 22 is the structured flowchart according to the choice device of the antenna data sending mode of embodiment 17.The choice device of this antenna data sending mode comprises: determination module 10, sending module 20.

Determination module 10 is used for determining to be suitable for from cyclic delay diversity CDD pattern or spatial reuse wave beam forming SM+BF pattern according to channel condition information the data transmission modes of receiving terminal;

Sending module 20 is used to use established data sending mode transmitting antenna data.

Adopt said apparatus, can be according to the system channel state information, selecting data transmission modes neatly is that cyclic delay diversity or spatial reuse wave beam forming send data.Thereby the stability and the throughput that has improved system of link have been increased.

In wireless communication system, above-mentioned channel condition information can include but not limited to following one of at least: weights correlation information, weights range information, signal to noise ratio CINR, mistake are sent out the information of rate BER and spatial coherence.

Wherein, BER feeds back to transmitting terminal for a mistake burst rate or a mistake rate by receiving terminal; Perhaps, transmitting terminal is by calculating, and concrete computational methods are mentioned in the above, repeat no more herein.

Wherein, information signal to noise ratio CINR comprises the CINR under the cyclic delay diversity data transmission modes _CDDOr the CINR under the spatial reuse wave beam forming data transmission modes _SMBFIt can be receiving terminal calculating and feed 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

Expression, Computational process also mention in the above, repeat no more herein.

Preferably, determination module 10 can comprise following one of at least: first determining unit 101, second determining unit 102, the 3rd determining unit 103, the 4th determining unit 104 and the 5th determining unit 105.

First determining unit 101 is used for comprising under the situation of weights correlation information at channel condition information, according to weights correlation instantaneous value in statistics judgement cycle greater than the times N s of correlation thresholding ₁, determine to be suitable for the data transmission modes of receiving terminal;

Second determining unit 102 is used for comprising under the situation of weights range information at channel condition information, according to weights in statistics judgement cycle apart from the times N s of instantaneous value greater than distance threshold ₂, determine to be suitable for the data transmission modes of receiving terminal;

The 3rd determining unit 103 is used for comprising that at channel condition information power makes an uproar under the situation than CINR, determines transmission rate V under the CDD pattern according to making an uproar respectively than CINR _CDDAnd the transmission rate V under the SM+BF pattern _SMBF, select V _CDDWith V _SMBFIn determine that the greater is as the data transmission modes that is suitable for receiving terminal;

The 4th determining unit 104 is used for comprising at channel condition information the information of spatial coherence, and wherein, spatial coherence is by the conditional number of channel correlation matrix

Under the situation of expression, judge

Whether greater than condition is counted threshold value

, to determine to be suitable for the data transmission modes of receiving terminal;

The 5th determining unit 105 is used for comprising under the situation of a mistake rate BER at channel condition information, judges whether BER sends out rate threshold value B ER less than mistake, to determine to be suitable for the data transmission modes of receiving terminal.

Preferably, determination module 10 can also comprise following one of at least: the 6th determining unit 106, the 7th determining unit 107, the 8th determining unit 108 and the 9th determining unit 109.

The 6th determining unit 106 is used for comprising under the situation of a signal to noise ratio CINR and a mistake rate BER at channel condition information, and determine to be suitable for the data transmission modes of receiving terminal, the 6th determining unit comprises:

The one CDD pattern subelement 1062 is used for obtaining the CINR under the CDD pattern to using the receiving terminal of CDD pattern _CDD, and judge CINR _CDDWhether greater than signal-noise ratio threshold value CDD TH ₀, to determine to be suitable for the data transmission modes of receiving terminal;

The one SM+BF pattern subelement 1064 is used for determining the BERS under the SM+BF pattern to using the receiving terminal of SM+BF pattern _MBF, and judge BER _SMBFWhether send out rate threshold value B ER greater than mistake ₀, to determine to be suitable for the data transmission modes of receiving terminal;

The 7th determining unit 107 is used for comprising that at channel condition information the information of signal to noise ratio CINR, spatial coherence and mistake send out under the situation of rate BER, and determine to be suitable for the data transmission modes of receiving terminal, the 7th determining unit comprises:

The 2nd CDD pattern subelement 1072 to using the receiving terminal of CDD pattern, is provided with the first thresholding interval [CDD_TH1, CDD_TH2], if CINR _CDD＜CDD_TH1 determines that then the CDD pattern is the data transmission modes that is suitable for receiving terminal, if CINR _CDD＞CDD_TH2 determines that then SM+BF is the data transmission modes that is suitable for receiving terminal, if CDD_TH1≤CINR _CDD≤ CDD_TH2 then triggers one of any data transmission modes of determining to be suitable for receiving terminal in the 3rd determining unit 103 to the 6th determining units 106;

The 2nd SM+BF pattern subelement 1074 to using the receiving terminal of SM+BF pattern, is provided with the second thresholding interval [SMBF_TH1, SMBF_TH2], if CINR _SMBF＜SMBF_TH1 determines that then the CDD pattern is the data transmission modes that is suitable for receiving terminal, if CINR _SMBF＞SMBF_TH2 determines that then SM+BF is the data transmission modes that is suitable for receiving terminal, if SMBF_TH1≤CINR _SMBF≤ SMBF_TH2 then triggers one of any data transmission modes of determining to be suitable for receiving terminal in the 3rd determining unit 103 to the 6th determining units 106;

The 8th determining unit 108 is used in the judgement cycle L determination point being set, and wherein, L is the integer more than or equal to 1; Trigger one of any data transmission modes of determining to be suitable for receiving terminal in the 3rd determining unit 103 to the 7th determining units 107 at each determination point, CDD pattern according to statistics is the times N 1 that is suitable for the data transmission modes of receiving terminal, perhaps the SM+BF pattern according to statistics is the times N 2 that is suitable for the data transmission modes of receiving terminal, determines to be suitable for the final data sending mode of receiving terminal;

The 9th determining unit 109 was used in the judgement cycle, judgment data transmission rate trend, and determine to be suitable for the data transmission modes of receiving terminal according to data transmission rate trend.

In sum, pass through the above embodiment of the present invention, the selection scheme of the antenna data sending mode that provides, can be (for example according to system's current weight information and/or channel condition information, the variation of channel condition and application scenarios), selecting data transmission modes neatly is that space diversity cyclic delay diversity and spatial reuse wave beam forming send data.Thereby the stability and the throughput that has improved system of link have been increased.

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

The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (22)

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

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

Described transmitting terminal uses described established data sending mode transmitting antenna data.

2. method according to claim 1 is characterized in that,

Described channel condition information comprises the weights correlation information; And

Determine to be suitable for the data transmission modes of receiving terminal in the following manner: add up the times N of interior weights correlation instantaneous value of a judgement cycle greater than the correlation thresholding _S1, and judge described N _S1Whether more than or equal to statistics thresholding Num1, if, determine that then the SM+BF pattern is the data transmission modes that is suitable for described receiving terminal, otherwise, determine that the CDD pattern is the data transmission modes that is suitable for described receiving terminal.

3. method according to claim 2 is characterized in that, adds up described Ns ₁Comprise:

Steps A: the previous weights correlation of initialization WR _Pre=α, wherein, α is the constant greater than 0; The described judgement cycle is the T frame; Obtain first weights W in the described judgement cycle ₁, Ns ₁Be initialized as 0;

Step B:, in present frame, obtain second weights W according to the time sequencing of frame ₂Calculate the current weight correlation of described current receiving terminal

, wherein, H is the conjugate transpose of matrix, || W ₁ ^H* W ₂|| representing matrix W ₁ ^H* W ₂Norm; Upgrading described previous weights correlation is WR _Pre=ρ R _Pre+ (1-ρ) R _Cur, ρ is constant and 0≤ρ≤1, with described second weights W ₂Value compose to described W ₁If WR _Pre〉=T _r, with statistic Ns ₁Add 1, T _rIt is first threshold value;

Repeat described step B, until described judgement end cycle or Ns ₁〉=Num ₁

4. method according to claim 1 is characterized in that,

Described channel condition information comprises the weights range information; And

Determine to be suitable for the data transmission modes of receiving terminal in the following manner: add up interior weights of a judgement cycle apart from the times N of instantaneous value greater than distance threshold _S2, and judge described N _S2Whether more than or equal to statistics thresholding Num2, if, determine that then the CDD pattern is the data transmission modes that is suitable for described receiving terminal, otherwise, determine that the SM+BF pattern is the data transmission modes that is suitable for described receiving terminal.

5. method according to claim 4 is characterized in that, adds up described Ns ₂Comprise:

Steps A: the previous weights distance D of initialization _Pre=α, wherein, α is the constant greater than 0; Obtain first weights W in the frame in the described judgement cycle ₁, the described cycle is the T frame, Ns ₂Be initialized as 0;

Step B: in a follow-up frame, obtain second weights W ₂Calculate the current weight distance D of described current receiving terminal _Cur=d (W ₁, W ₂), wherein, d (W ₁, W ₂) be one of following formula:

$d(W_1,W_2)={\mathrm{\&lambda;}}_{\max }(W_1{W_1}^H-W_2{W_2}^H),$

$d(W_1,W_2)={\mathrm{\&Sigma;}}_{k=1}^{\mathrm{Tx}}{\mathrm{\&Sigma;}}_{h=1}^M{|w_{k,h}^{\left(1\right)}-w_{k,h}^{\left(2\right)}|}^p,$

$d(W_1,W_2)={\left({\mathrm{\&Sigma;}}_{k=1}^{\mathrm{Tx}}{\mathrm{\&Sigma;}}_{h=1}^M{|w_{k,h}^{\left(1\right)}-w_{k,h}^{\left(2\right)}|}^p\right)}^{\frac{1}{p}},$

$d(W_1,W_2)=\max \{{|w_{\mathrm{1,1}}^{\left(1\right)}-w_{\mathrm{1,1}}^{\left(2\right)}|}^p,...,{|w_{\mathrm{Tx},M}^{\left(1\right)}-w_{\mathrm{Tx},M}^{\left(2\right)}|}^p\},$

Wherein, λ _Max(W ₁W ₁ ^H-W ₂W ₂ ^H) representing matrix W ₁W ₁ ^H-W ₂W ₂ ^HEigenvalue of maximum,

With Be the beam shape-endowing weight value of described current receiving terminal, w _{M, l} ⁽¹⁾, w _{M, l} ⁽²⁾Be the weights component of the different m root constantly of described current receiving terminal transmitting antenna to l wave beam; M=1,2 ..., Tx, l=1,2 ..., M, Tx are the number of all physical antennas of described transmitting terminal, and M is the number of all wave beams of all antenna transmission of described transmitting terminal, and p is the constant greater than 0; Upgrade described previous weights distance and be D _Pre=ρ D _Pre+ (1-ρ) D _Cur, ρ is constant and 0≤ρ≤1, with described second weights W ₂Value compose to described W ₁If D _Pre〉=D _r, with statistic Ns ₂Add 1, D _rIt is the 3rd threshold value;

Repeat described step B, until described judgement end cycle or Ns ₂〉=Num ₂

6. method according to claim 1 is characterized in that,

Described channel condition information bag signal to noise ratio CINR; And

Determine to be suitable for the data transmission modes of receiving terminal in the following manner:

Determine the CINR under the described CDD pattern _CDDCorresponding order of modulation M _CDD, code rate P _CDD, coding number of repetition R _CDD, and calculate transmission rate V under the described CDD pattern _CDD=M _CDD* P _CDD÷ R _CDD

Determine the CINR under the described SM+BF pattern _SMBFCorresponding order of modulation M _SMBF, code rate P _SMBF, coding number of repetition R _SMBFAnd the multiple-input and multiple-output MIMO code rate α of spatial reuse _SMBF, and calculate transmission rate V under the described SM+BF pattern _SMBF=α _SMBF* M _SMBF* P _SMBF÷ R _SMBF

At described V _CDDWith described V _SMBFIn determine the greater, and determine that the data transmission modes of described the greater correspondence is the data transmission modes that is suitable for described receiving terminal.

7. 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

Expression; And

Determine to be suitable for the data transmission modes of receiving terminal in the following manner: calculating is obtained described , and judge described Whether greater than condition is counted threshold value

, if, determine that then described SM+BF pattern is the data transmission modes that is suitable for described receiving terminal, otherwise, determine that described CDD pattern is the data transmission modes that is suitable for described receiving terminal.

8. method according to claim 7 is characterized in that, calculating is obtained described in the following manner

:

Steps A: the previous channel relevancy matrix of initialization R _Pre

Step B:, calculate current receiving terminal and in frame structure, be used for channel relevancy matrix on the carrier set of calculating channel correlation matrix according to time sequencing: , wherein, N _cRepresent to comprise on the described carrier set number of carrier wave,

And α _k〉=0 is respectively the channel coefficient matrix and the proportionality coefficient of k subcarrier in the described specific carriers set, h _Ij(k) channel coefficients that is j root transmitting antenna to k the carrier wave between i root reception antenna, j=1 ..., M, i=1 ..., N, M are actual physics transmitting antenna number or virtual-antenna number, N is the reception antenna number; Upgrading described previous channel relevancy matrix is R _Pre=ρ R _Pre+ (1-ρ) R, ρ is constant and 0≤ρ≤1; In the described judgement cycle, repeat this step, until described judgement end cycle;

Step C: the conditional number of calculating previous channel relevancy matrix:

Wherein, f is one of following formula:

Perhaps f (R _Pre)=λ _Min(R _Pre);

Wherein, tr (R _Pre) representing matrix R _PreMark, subscript H represents matrix is asked conjugate transpose, λ _Max(R _Pre), λ _Min(R _Pre) be respectively matrix R _PreMinimum and maximum characteristic value.

9. method according to claim 1 is characterized in that,

Described channel condition information comprises bit error rate BER; And

Determine to be suitable for the data transmission modes of receiving terminal in the following manner:

Determine described BER, wherein, described BER determines one of at least in the following manner: obtain the described BER of described receiving terminal feedback in the judgement cycle, perhaps utilize to mix to retransmit or retransmit automatically the described BER that calculates under the current data sending mode automatically;

Judge whether described BER sends out rate threshold value B ER less than mistake ₀, if, determine that then described SM+BF pattern is the data transmission modes that is suitable for described receiving terminal, otherwise, determine that described CDD pattern is the data transmission modes that is suitable for described receiving terminal.

10. method according to claim 1 is characterized in that,

Described channel condition information comprises: signal to noise ratio CINR and mistake are sent out rate BER; And

Determine to be suitable for the data transmission modes of receiving terminal in the following manner:

To using the receiving terminal of described CDD pattern, obtain the CINR under the described CDD pattern _CDD, and judge described CINR _CDDWhether greater than signal-noise ratio threshold value CDD_TH ₀, if, determine that then described SM+BF pattern is the data transmission modes that is suitable for described receiving terminal, otherwise, determine that described CDD pattern is the data transmission modes that is suitable for described receiving terminal.

To using the receiving terminal of described SM+BF pattern, determine the BER under the described SM+BF pattern _SMBF, and judge described BER _SMBFWhether send out rate threshold value B ER greater than mistake ₀, if, determine that then described CDD pattern is the data transmission modes that is suitable for described receiving terminal, otherwise, determine that described SM+BF pattern is the data transmission modes that is suitable for described receiving terminal, wherein, described BER _SMBFOne of at least determine in the following manner: obtain the described BER that this receiving terminal feeds back successively in the judgement cycle in _SMBF, perhaps utilize to mix to retransmit or retransmit automatically the BER that calculates under the current data sending mode automatically _SMBF

11. according to each described method of claim 6 to 10, it is characterized in that,

Described channel condition information comprises: the information of signal to noise ratio CINR, spatial coherence and mistake are sent out rate BER; And

Determine to be suitable for the data transmission modes of receiving terminal in the following manner:

To using the receiving terminal of described CDD pattern, the first thresholding interval [CDD_TH1, CDD_TH2] is set, if CINR _CDD＜CDD_TH1 determines that then described CDD pattern is the data transmission modes that is suitable for receiving terminal, if CINR _CDD＞CDD_TH2 determines that then described SM+BF is the data transmission modes that is suitable for receiving terminal, if CDD_TH1≤CINR _CDD≤ CDD_TH2 then determines to be suitable for the data transmission modes of receiving terminal by each described mode of claim 4-8;

To using the receiving terminal of described SM+BF pattern, the second thresholding interval [SMBF_TH1, SMBF_TH2] is set, if CINR _SMBF＜SMBF_TH1 determines that then described CDD pattern is the data transmission modes that is suitable for receiving terminal, if CINR _SMBF＞SMBF_TH2 determines that then described SM+BF is the data transmission modes that is suitable for receiving terminal, if SMBF_TH1≤CINR _SMBF≤ SMBF_TH2 then determines to be suitable for the data transmission modes of receiving terminal by each described mode of claim 4-8.

12. method according to claim 11 is characterized in that, determines to be suitable for the data transmission modes of receiving terminal in the following manner:

L determination point was set in the judgement cycle, and wherein, L is the integer greater than 1;

Pass through the described mode of claim 11 at each described determination point, from described CDD pattern or described SM+BF pattern, determine to be suitable for the data transmission modes of receiving terminal, and to add up described CDD pattern be the times N 1 that is suitable for the data transmission modes of receiving terminal, and perhaps adding up described SM+BF pattern is the times N 2 that is suitable for the data transmission modes of receiving terminal;

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

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

13. according to each described method of claim 6 to 10, it is characterized in that,

Described channel condition information comprises: the information of signal to noise ratio CINR, spatial coherence and mistake are sent out rate BER; And

Determine to be suitable for the data transmission modes of receiving terminal in the following manner:

L determination point was set in the judgement cycle, and wherein, L is the integer greater than 1;

Carry out described determining step at each described determination point, determine that described CDD pattern or described SM+BF pattern are the data transmission modes that is suitable for receiving terminal, and to add up described CDD pattern be the times N 1 that is suitable for the data transmission modes of receiving terminal, and perhaps adding up described SM+BF pattern is the times N 2 that is suitable for the data transmission modes of receiving terminal;

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

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

14. method according to claim 1 is characterized in that determining in the following manner to be suitable for the data transmission modes of receiving terminal:

In the judgement cycle, transmitting terminal is according to channel condition information judgment data transmission rate trend;

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

15. method according to claim 14 is characterized in that,

Described channel condition information comprises CINR;

Transmitting terminal comprises according to channel condition information judgment data transmission rate trend:

A plurality of determination points were set in the judgement cycle, obtain CINR under current data sending mode at each described determination point successively, and add up CINR 〉=CINR in the described second judgement cycle ₀Times N _s, described CINR ₀Be the signal-noise ratio threshold value;

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

16. method according to claim 14 is characterized in that,

Described channel condition information comprises a mistake rate BER;

Transmitting terminal comprises according to channel condition information judgment data transmission rate trend:

The judgement cycle is divided into a plurality of minor cycles, in each described minor cycle, obtains the BER of described receiving terminal feedback successively, perhaps utilize to mix to retransmit or retransmit automatically the BER that calculates under the current data sending mode automatically;

Add up BER≤BER in the described judgement cycle ₀Times N _s, described BER ₀For mistake is sent out the rate threshold value;

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

17. according to each described method of claim 14 to 16, it is characterized in that, determine that according to described data transmission rate trend described CDD pattern or described SM+BF pattern are that the data transmission modes that is suitable for receiving terminal comprises:

If described transmission rate trend rises, determine that between current data transmission rate and maximum transmission rate the pattern of a data transmission rate correspondence is the data transmission modes that is suitable for receiving terminal;

If described transmission rate trend descends, determine that between current data transmission rate and minimum transmission rate the pattern of a data transmission rate correspondence is the data transmission modes that is suitable for receiving terminal;

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

18. method according to claim 1 is characterized in that,

Described channel condition information comprises: the type I information and second category information, wherein, type I information comprises: weights correlation information or weights range information, second category information comprise following one of at least: the information of signal to noise ratio CINR, spatial coherence or mistake are sent out a rate BER; And

Determine to be suitable for the data transmission modes of receiving terminal in the following manner:

Described transmitting terminal selects to be suitable for the data transmission modes of described receiving terminal according to described type I information, if select the CDD pattern, determines that then described CDD pattern is the final data sending mode;

Otherwise, described transmitting terminal selects to be suitable for the data transmission modes of described receiving terminal according to described second category information, if select the CDD pattern, determines that then described CDD pattern is the final data sending mode, otherwise, determine that described SM+BF pattern is the final data sending mode.

19. method according to claim 1 is characterized in that,

Described channel condition information comprises: the type I information and second category information, wherein, type I information comprises: weights correlation information or weights range information, second category information comprise following one of at least: the information of signal to noise ratio CINR, spatial coherence or mistake are sent out a rate BER; And

Determine to be suitable for the data transmission modes of receiving terminal in the following manner:

Described transmitting terminal selects to be suitable for the data transmission modes of described receiving terminal according to described second category information, if select the CDD pattern, determines that then described CDD pattern is the final data sending mode;

Otherwise, described transmitting terminal selects to be suitable for the data transmission modes of described receiving terminal according to described type I information, if select the CDD pattern, determines that then described CDD pattern is the final data sending mode, otherwise, determine that described SM+BF pattern is the final data sending mode.

20. the choice device of an antenna data sending mode is characterized in that, comprising:

Determination module is used for determining to be suitable for from cyclic delay diversity CDD pattern or spatial reuse wave beam forming SM+BF pattern according to channel condition information the data transmission modes of receiving terminal;

Sending module is used to use described established data sending mode to send data.

21. device according to claim 20 is characterized in that, described determination module comprise following one of at least:

First determining unit is used for comprising under the situation of weights correlation information at described channel condition information, according to weights correlation instantaneous value in statistics judgement cycle greater than the times N s of correlation thresholding ₁, determine to be suitable for the data transmission modes of receiving terminal;

Second determining unit is used for comprising under the situation of weights range information at described channel condition information, according to weights in statistics judgement cycle apart from the times N s of instantaneous value greater than distance threshold ₂, determine to be suitable for the data transmission modes of receiving terminal;

The 3rd determining unit is used for comprising that at described channel condition information power makes an uproar under the situation than CINR, determines transmission rate V under the described CDD pattern according to described making an uproar respectively than CINR _CDDAnd the transmission rate V under the described SM+BF pattern _SMBF, select described V _CDDWith described V _SMBFIn determine that the greater is as the data transmission modes that is suitable for receiving terminal;

The 4th determining unit is used for comprising at described channel condition information the information of spatial coherence, and wherein, described spatial coherence is by the conditional number of channel correlation matrix

Under the situation of expression, judge described

Whether greater than condition is counted threshold value

, to determine to be suitable for the data transmission modes of receiving terminal;

The 5th determining unit is used for comprising under the situation of a mistake rate BER at described channel condition information, judges whether described BER sends out rate threshold value B ER less than mistake ₀, to determine to be suitable for the data transmission modes of receiving terminal.

22. device according to claim 21 is characterized in that, described determination module also comprise following one of at least:

The 6th determining unit is used for comprising under the situation of a signal to noise ratio CINR and a mistake rate BER at described channel condition information, and determine to be suitable for the data transmission modes of receiving terminal, described the 6th determining unit comprises:

The one CDD pattern subelement is used for obtaining the CINR under the described CDD pattern to using the receiving terminal of described CDD pattern _CDD, and judge described CINR _CDDWhether greater than signal-noise ratio threshold value CDD_TH ₀, to determine to be suitable for the data transmission modes of receiving terminal;

The one SM+BF pattern subelement is used for determining the BER under the described SM+BF pattern to using the receiving terminal of described SM+BF pattern _SMBF, and judge described BER _SMBFWhether send out rate threshold value B ER greater than mistake ₀, to determine to be suitable for the data transmission modes of receiving terminal;

The 7th determining unit is used for comprising that at described channel condition information the information of signal to noise ratio CINR, spatial coherence and mistake send out under the situation of rate BER, and determine to be suitable for the data transmission modes of receiving terminal, described the 7th determining unit comprises:

The 2nd CDD pattern subelement to using the receiving terminal of described CDD pattern, is provided with the first thresholding interval [CDD_TH1, CDD_TH2], if CINR _CDD＜CDD_TH1 determines that then described CDD pattern is the data transmission modes that is suitable for receiving terminal, if CINR _CDD＞CDD_TH2 determines that then described SM+BF is the data transmission modes that is suitable for receiving terminal, if CDD_TH1≤CINR _CDD≤ CDD_TH2 then triggers one of any data transmission modes of determining to be suitable for receiving terminal in described the 3rd determining unit to the six determining units;

The 2nd SM+BF pattern subelement to using the receiving terminal of described SM+BF pattern, is provided with the second thresholding interval [SMBF_TH1, SMBF_TH2], if CINR _SMBF＜SMBF_TH1 determines that then described CDD pattern is the data transmission modes that is suitable for receiving terminal, if CINR _SMBF＞SMBF_TH2 determines that then described SM+BF is the data transmission modes that is suitable for receiving terminal, if SMBF_TH1≤CINR _SMBF≤ SMBF_TH2 then triggers one of any data transmission modes of determining to be suitable for receiving terminal in described the 3rd determining unit to the six determining units;

The 8th determining unit is used in the judgement cycle L determination point being set, and wherein, L is the integer more than or equal to 1; Trigger one of any data transmission modes of determining to be suitable for receiving terminal in described the 3rd determining unit to the seven determining units at each described determination point, described CDD pattern according to statistics is the times N 1 that is suitable for the data transmission modes of receiving terminal, perhaps the described SM+BF pattern according to statistics is the times N 2 that is suitable for the data transmission modes of receiving terminal, determines to be suitable for the final data sending mode of receiving terminal;

The 9th determining unit was used in the judgement cycle, judgment data transmission rate trend, and determine to be suitable for the data transmission modes of receiving terminal according to described data transmission rate trend.

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