CN101826899B - Signal transmission method and device based on relay - Google Patents

Abstract

The embodiment of the invention provides a signal transmission method and device based on a relay, belonging to the network communication field. The method comprises the following steps: receiving the signal corresponding to first data information in data information to be transmitted by an information source broadcast in a slot 1, wherein the data information to be transmitted comprises the first data information and second data information; receiving the signal, which is transmitted by a source, corresponding to the second data information in a slot 2 and simultaneously receiving the signal, which is transmitted by the relay, corresponding to the medium data; analyzing the above signals to obtain the medium data and the second data information and obtaining the first data information from the signal corresponding to the first data information according to the medium data; and combining the first data information and the second data information to obtain the data information to be transmitted. The method and the device have the advantages of increasing channel capacity and reducing capacity loss.

Description

Method for transmitting signals and device based on relaying

Technical field

The present invention relates to network communication field, relate in particular to a kind of method for transmitting signals based on relaying and device.

Background technology

Relaying technique is that a kind of wireless communication system that can improve resists the channel fading ability, increase the effective means of service coverage, by increase relaying Relay node forwarding information in wireless communication system, can consist of virtual multi-antenna with existing information source Source, utilize space diversity to promote the reliability that receives.In order to realize the signal transmission based on relaying, prior art provides a kind of method for transmitting signals based on relaying, and the method adopts the quadrature relaying to carry out the signal transmission, and data to be transmitted is divided into two parts: Base (X _b) and Superposed (Xs), in time slot 1 (Slot1), Source sends the signal of Base and Superposed stack to Relay and the purpose stay of two nights (Destination) $X=\sqrt{\mathrm{\α}}{X}_b+(1-\sqrt{\mathrm{\α}})X_s,$ Wherein α is the supercomposed coding power division factor; Suppose that Relay correctly receives the signal that Source sends, the superposed signal from receiving $X=\sqrt{\mathrm{\α}}{X}_b+(1-\sqrt{\mathrm{\α}})X_s$ Parse Superposed (Xs) in signal, Relay receives the first data-signal at Slot 1, at first solves X _b(with Xs as disturbing) then utilizes the X that translates _bReconstruct receives in signal X

Part, and it is deducted from X.Disturb by detection and eliminate residual signal afterwards this moment

Obtain Xs, and Relay sends Superposed (Xs) to Destination separately in time slot 2 (Slot 2), Destination is according to the reception signal at Slot 2, solve the signal of Superposed (Xs), then adopt counteracting serial interference (Serial interference Cancellation, SIC) to solve Base (X from the reception signal of Slot 1 _b) signal, then with Superposed (Xs) and Base (X _b) superposeing namely obtains data waiting for transmission.

When realizing the scheme of prior art, the inventor finds that prior art has following technical problem:

What adopt due to the signal in the technical scheme of prior art transmission is the quadrature relaying, so its Source in Slot 2 does not carry out the signal transmission to Destination, thereby causes the loss of capacity.

Summary of the invention

Embodiment of the present invention provides a kind of method for transmitting signals based on relaying and device, and described method and device have the increase channel capacity, reduces the advantage of capacitance loss.

The specific embodiment of the present invention provides a kind of method for transmitting signals based on relaying, and described method comprises:

Signal corresponding to the first data message in time slot Slot 1 in the data message waiting for transmission of reception information source Source broadcasting, described data message waiting for transmission comprises described the first data message and the second data message;

Receive signal corresponding to described the second data message that described Source sends in Slot 2, and receiving the corresponding signal of intermediate data that relaying Relay sends, described intermediate data is the described Relay signal acquisition corresponding according to described the first data message that receives;

Resolve respectively the corresponding signal of described intermediate data and signal corresponding to described the second data message, obtain described intermediate data and described the second data message, and obtain described the first data message according to described intermediate data from signal corresponding to described the first data message;

Described the first data message and described the second data message are combined obtain described data message waiting for transmission.

The specific embodiment of the invention also provides a kind of receiving system of the signal transmission based on relaying, and this device comprises,

Receiving element is used for signal corresponding to the first data message in the data message waiting for transmission of time slot Slot 1 reception information source Source broadcasting; Described data message waiting for transmission comprises described the first data message and the second data message;

Described receiving element also is used for receiving at Slot 2 signal corresponding to described the second data message that described Source sends, and receives the corresponding signal of intermediate data that relaying Relay sends;

Resolution unit, be used for resolving respectively the corresponding signal of described intermediate data and signal corresponding to described the second data message, obtain described intermediate data and described the second data message, and obtain described the first data message according to described intermediate data from signal corresponding to described the first data message;

Synthesis unit, being used for described the first data message and described the second data message are combined obtains described data message waiting for transmission.

The specific embodiment of the invention also provides a kind of dispensing device that transmits based on the signal of relaying, and this device comprises:

Transmitting element is used for signal corresponding to the first data message in Slot 1 broadcasting data message waiting for transmission; Described data message waiting for transmission comprises the first data message and the second data message; Described transmitting element also is used for sending signal corresponding to described the second data message at Slot 2.

The specific embodiment of the invention also provides a kind of relay that transmits based on the signal of relaying, and this device comprises:

Receiving element is used for receiving at time slot Slot 1 signal corresponding to the first data message that information source Source broadcasts;

Resolution unit is used for resolving signal acquisition the first data message corresponding to described the first data message, and inquires corresponding group of information of described the first data message according to described the first data message, and this group information is intermediate data;

Transmitting element is used at time slot Slot 2, the corresponding signal of described intermediate data being sent.

can be found out by the above-mentioned technical scheme that provides, the technical scheme of the embodiment of the present invention is by receiving the first corresponding signal of data message in Slot 1, and the signal corresponding to intermediate data of the second corresponding signal of data message that reception Source sends in Slot 2 and Relay transmission, and obtain the second data message and intermediate data by resolving the corresponding signal of this second data message and the corresponding signal of this intermediate data, obtain the first data message according to this intermediate data from the corresponding signal of this first data message, the first data message and the second data message are combined obtain data message waiting for transmission, also receive the second corresponding signal of data message that Source sends in Slot 2 due to this technical scheme, so it has the larger channel capacity of acquisition, reduce the characteristics of capacitance loss.

Description of drawings

The flow chart of a kind of method for transmitting signals based on relaying that Fig. 1 provides for the specific embodiment of the invention.

The flow chart of a kind of method for transmitting signals based on relaying that Fig. 2 provides for one embodiment of the invention.

Fig. 3 the invention provides an embodiment in the situation that the channel capacity comparison diagram of additive white Gaussian noise channel.

Fig. 4 is that one embodiment of the invention is in the situation that Source obeys the outage probability comparison diagram of additive white Gaussian noise channel condition to Destination and Relay to the flat decline of Destination channel obedience Rayleigh, Source to the Relay channel.

A kind of signal transmission schematic diagram based on the nonopiate relaying of linear superposition that Fig. 5 provides for another embodiment of the present invention.

The flow chart of a kind of method for transmitting signals based on relaying that Fig. 6 provides for another embodiment of the present invention.

Fig. 7 consists of scheme for a kind of Nonlinear Superposition signal that one embodiment of the invention provides.

A kind of signal transmission schematic diagram based on the nonopiate relaying of Nonlinear Superposition that Fig. 8 provides for one embodiment of the invention.

The flow chart of a kind of method for transmitting signals based on relaying that Fig. 9 provides for this invention one embodiment.

The structure chart of the receiving system of a kind of signal transmission based on relaying that Figure 10 provides for one embodiment of the invention.

The structure chart of the dispensing device of a kind of signal transmission based on relaying that Figure 11 provides for one embodiment of the invention.

The structure chart of the relay of a kind of signal transmission based on relaying that Figure 12 provides for one embodiment of the invention.

Embodiment

Embodiment of the present invention provides a kind of method for transmitting signals based on relaying, the method as shown in Figure 1, the technology scene that the method realizes is, the method is completed between Source, Relay and Destination, with data message waiting for transmission two parts independently respectively, these two parts can be the first data message and the second data message respectively, this data message waiting for transmission can for, the data message that Source need to transmit to Destination, the method comprises the steps:

Step 11, Destination receive the first corresponding signal of data message of Source broadcasting in Slot 1;

Step 12, Destination receive the second corresponding signal of data message that Source sends in Slot 2, and receive signal corresponding to intermediate data that Relay sends, and this intermediate data can obtain by the first data-signal;

Realize in this step the concrete grammar that obtains intermediate data can for, Relay resolves corresponding signal acquisition the first data message of this first data message, obtain corresponding group of information of this first data message according to grouping corresponding relation (this grouping corresponding relation is all known for Source, Relay and Destination usually) again, this group information is intermediate data, and then the signal that this intermediate data is corresponding sends.The first corresponding signal of data message that described Relay receives is that Source broadcasts in slot 1.

Obtain in this step intermediate data concrete grammar can also for, if the signal that this first data message is corresponding is supercomposed coding, suppose that here signal corresponding to the first data message is formed by stacking by the information of direct transferring corresponding signal and intermediate data corresponding signal linearity in Slot 1; The concrete grammar that obtains can for, Relay resolves signal corresponding to the first data with intermediate data corresponding signal in Slot 1 as interference signal and obtains the information of direct transferring, re-construct the corresponding signal of the information of direct transferring according to the information of direct transferring, deduct with signal corresponding to the first data the signal that the corresponding signal of the information of direct transferring obtains intermediate data correspondence in Slot 1, resolve intermediate data corresponding signal in Slot 1 and obtain intermediate data.

The below is described in detail with the example of a reality, here suppose that the first data message may be integer set { 1,2,3,4,5,6,7,8, any one in 9,10}, this grouping corresponding relation is, odd number group and even number set, suppose that the first data message that Relay resolves the first corresponding signal acquisition of data message is 3, to obtain group information corresponding to this first data message according to the grouping corresponding relation be odd number group to Relay, and the signal that Relay is corresponding with odd number group sends to Destination.

Step 13, Destination resolve respectively the corresponding signal of this second data message and the corresponding signal of this intermediate data obtains the second data message and intermediate data, and obtains the first data message according to this intermediate data from the corresponding signal of this first data message.

Realize this step concrete grammar can for, obtain the first data message according to intermediate data and by list decoding listdecoding operation from the first corresponding signal of data message that receives.The concrete grammar of above-mentioned list decoding operation can be referring to T.Cover, " Elements ofinformation theory ", Jonh Wiley﹠amp; Sons, the associated description of Inc.1991.

Step 14, Destination combine the second data message and the first data message and obtain described data message waiting for transmission.

the Destination of the specific embodiment of the invention is by receiving the first corresponding signal of data message in Slot 1, and the second corresponding signal of data message and the Relay that receive the Source transmission in Slot 2 send signal corresponding to intermediate data, and obtain the second data message and intermediate data by resolving the corresponding signal of this second data message and the corresponding signal of this intermediate data, and obtain the first data message according to this intermediate data from the corresponding signal of this first data message, the first data message and the second data message are combined obtain data message waiting for transmission, also receive the second corresponding signal of data message that Source sends in Slot2 due to Destination, so it has the larger channel capacity of acquisition, reduce the characteristics of capacitance loss.

For the technical scheme of the specific embodiment of the present invention better is described, existing with specific embodiments and the drawings is described in detail technical scheme of the present invention.

The specific embodiment of the invention also provides an embodiment, the present embodiment provides a kind of method for transmitting signals based on relaying, the method is completed between Source, Relay and Destination, the technology scene that the present embodiment is realized is in advance data message W waiting for transmission to be divided into independently two parts W ₁And W ₂, the signal in the present embodiment certainly in actual conditions, also can be other code book all take Gauss's code book as example; Corresponding to this two parts information W independently ₁And W ₂Signal be respectively X _Source ⁽¹⁾(w ₁) and X _Source ⁽²⁾(w ₂), this X _Source ⁽¹⁾(w ₁) construct by the linear superposition mode, its concrete make can for, with W ₁Be divided into independently part intermediate data S ₁With the information U that direct transfers ₁, its corresponding Gauss's code book is X _Source ⁽¹²⁾(s ₁) and X _Source ⁽¹¹⁾(u ₁), X _Source ⁽¹⁾(w ₁) can be by X _Source ⁽¹²⁾(s ₁) and X _Source ⁽¹¹⁾(u ₁) linear superposition forms, wherein, X _Source ⁽¹²⁾(s ₁) be a code word size be τ n,

Gauss's code book that individual independent code word forms, X _Source ⁽¹¹⁾(u ₁) be a code word size be τ n, by

Gauss's code book that individual independent code word forms; Preset linear superposition signal X _Source ⁽¹⁾(w ₁) middle X _Source ⁽¹²⁾(s ₁) component signal and the corresponding signal X of intermediate data _Relay ⁽¹²⁾(s ₁) between mapping relations, X wherein _Relay ⁽¹²⁾(s ₁) use be a code word size be (1-τ) n, by

Gauss's code book that individual independent code word forms; In the present embodiment, these mapping relations are, X _Source ⁽¹²⁾(s ₁) code word and X in code book _Relay ⁽¹²⁾(s ₁) in element be relation one to one; Said n is for sending the length (comprising Slot 1 and Slot 2) of all data symbols from Source to Destination, τ is the ratio that Slot 1 takies all time interval resources, and in actual conditions, this τ can preferred 0.5; Realize the step of the method as shown in Figure 2, specifically can comprise:

Step 21, Source are at Slot 1 broadcasting X _Source ⁽²⁾(w ₁), X wherein _Source ⁽¹⁾(w ₁)=X _Source ⁽¹¹⁾(u ₁)+X _Source ⁽¹²⁾(s ₁);

Step 22, Relay and Destination receive Source at the X of Slot 1 broadcasting _Source ⁽¹⁾(w ₁);

Step 23, Relay are according to X _Source ⁽¹⁾(w ₁) need to determine the code word X that sends in Slot 2 _Relay ⁽¹²⁾(s ₁);

Realize this step method can for, resolve X _Source ⁽¹⁾(w ₁) obtain X _Source ⁽¹²⁾(s ₁), according to code book X _Source ⁽¹²⁾(s ₁) in code word and code book X _Relay ⁽¹²⁾(s ₁) in code word one to one relation need to determine the code word X that sends in Slot 2 _Relay ⁽¹²⁾(s ₁).

Step 24, Source send X at Slot 2 to Destination _Source ⁽²⁾(w ₂); Relay sends X at Slot 2 to Destination simultaneously _Relay ⁽¹²⁾(s ₁);

Step 25, Destination receive at Slot 2 the code word X that Source sends _Source ⁽²⁾(w ₂) and the code word X that sends of Relay _Relay ⁽¹²⁾(s ₁); And according to the X that receives _Source ⁽¹⁾(w ₁) and X _Source ⁽²⁾(w ₂) obtain data message waiting for transmission.

Performing step 25 specifically can comprise the steps:

Step 251, the signal that receives in Slot 2 is resolved obtain the code word X that Relay sends _Relay ⁽¹²⁾(s ₁), and then obtain X _Relay ⁽¹²⁾(s ₁) corresponding intermediate data s ₁

The X that step 252, utilization parse _Relay ⁽¹²⁾(s ₁), parse X by SIC from the reception signal of Slot 2 _Source ⁽²⁾(w ₂), and then obtain X _Source ⁽²⁾(w ₂) corresponding data message w ₂

The intermediate data s that step 253, utilization parse ₁Re-construct X _Relay ⁽¹²⁾(s ₁), and utilize the X that re-constructs _Source ⁽¹²⁾(s ₁) adopt SIC to parse code word X from the reception signal of slot 1 _Source ⁽¹¹⁾(u ₁), and then obtain X _Source ⁽¹¹⁾(u ₁) corresponding data message u ₁

Step 26, with the data message U that obtains ₁, S ₁And W ₂Make up and obtain whole data to be transmitted information W.Concrete, due to described W ₁Be divided into independently part intermediate data S ₁With the information U that direct transfers ₁Therefore, in anabolic process, can think described U ₁, S ₁Be combined into W ₁, the described W of recombinant ₁And W ₂Form described W.Certainly, with described U ₁, S ₁And W ₂The action of making up can be completed together, and regardless of operating sequence.

Optionally, the method that provides of the present embodiment can further improve channel capacity by any one or its combination in following manner.

Mode A, adjustment Slot 1 and Slot 2 proportions.

Mode B, adjustment Source send X _Source ⁽¹⁾(w ₁) and X _Source ⁽²⁾(w ₂) energy used.

Mode C, adjustment consist of code word X _Source ⁽¹⁾(w ₁) X _Source ⁽¹¹⁾(u ₁) and X _Source ⁽¹²⁾(s ₁) energy.

Realize below by the example explanation of a reality concrete grammar that aforesaid way A, B, C adopt, this example has adopted the combination of above-mentioned three kinds of modes.Can not surpass nP at the average emitted energy of this hypothesis Source within the whole transmission cycle _S, X _Source ⁽¹⁾(w ₁) ratio that takies gross energy is κ, so the symbol power that Source launches in Slot 1 is $P_S^{\left(1\right)}=\frac{\mathrm{}\mathrm{\κ}}{\mathrm{\τ}}{P}_S;$ Source launches X in Slot 2 _Source ⁽²⁾(w ₂) symbol power be $P_S^{\left(2\right)}=\frac{1-\mathrm{\κ}}{1-\mathrm{\τ}}{P}_S;$ Suppose the symbol power P in Slot 1 emission _S ⁽¹⁾In, X _Source ⁽¹¹⁾(u ₁) proportion is α, X _Source ⁽¹²⁾(s ₁) proportion is 1-α.

Under above parameter configuration (α, κ, τ), the information rate that adopts the nonopiate relay transmission scheme embodiment of as above linear superposition coding to reach is shown below.

R _SCNOR(α，κ，τ)＝R ₁₁(α，κ，τ)+R ₁₂(α，κ，τ)+R ₂(τ，κ)

$R_{11}(\mathrm{\&alpha;},\mathrm{\&kappa;},\mathrm{\&tau;})=\min (\mathrm{\&tau;C}\left(\mathrm{\&alpha;}\frac{\mathrm{\&kappa;}}{\mathrm{\&tau;}}{\mathrm{\&gamma;}}_{\mathrm{SD}}\right),\mathrm{\&tau;C}\left(\frac{\mathrm{\&alpha;}\frac{\mathrm{\&kappa;}}{\mathrm{\&tau;}}{\mathrm{\&gamma;}}_{\mathrm{<figure-callout\; id="1"\; label="SR"\; filenames="H2009100789628E00031.png,H2009100789628E00032.png"\; state="\{\{state\}\}">SR</figure-callout>}}}{1+(1-\mathrm{\&alpha;})\frac{\mathrm{\&kappa;}}{\mathrm{\&tau;}}{\mathrm{\&gamma;}}_{\mathrm{SR}}}\right))$

$R_{12}(\mathrm{\&alpha;},\mathrm{\&kappa;},\mathrm{\&tau;})=\min (\mathrm{\&tau;C}\left((1-\mathrm{\&alpha;})\frac{\mathrm{\&kappa;}}{\mathrm{\&tau;}}{\mathrm{\&gamma;}}_{\mathrm{SR}}\right),(1-\mathrm{\&tau;})C\left(\frac{\frac{1}{1-\mathrm{\&tau;}}{\mathrm{\&gamma;}}_{\mathrm{<figure-callout\; id="1"\; label="RD"\; filenames="H2009100789628E00031.png,H2009100789628E00032.png"\; state="\{\{state\}\}">RD</figure-callout>}}}{1+\frac{1-\mathrm{\&kappa;}}{1-\mathrm{\&tau;}}{\mathrm{\&gamma;}}_{\mathrm{SD}}}\right))---\left(1\right)$

$R_2(\mathrm{\&tau;},\mathrm{\&kappa;})=(1-\mathrm{\&tau;})C\left(\frac{1-\mathrm{\&kappa;}}{1-\mathrm{\&tau;}}{\mathrm{\&gamma;}}_{\mathrm{SD}}\right)$

Function in following formula (1) $C\left(x\right)=\frac{1}{2}{\log }_2(1+x);$ ${\mathrm{\&gamma;}}_{\mathrm{xy}}=\frac{{\left|h_{\mathrm{xy}}\right|}^2{P}_X}{N_y},$ H wherein _xyBe the channel fading coefficient from transmitting terminal x to receiving terminal y, P _xBe the transmitting power of transmitting terminal x, N _yThermal noise power spectrum density for receiving terminal y place.

In order to make the channel capacity in the present embodiment maximum, need to find the solution following optimization problem.

$(\mathrm{\&alpha;},\mathrm{\&kappa;},\mathrm{\&tau;})=\mathrm{<figure-callout\; id="0"\; label="arg\; max"\; filenames="H2009100789628E00031.png,H2009100789628E00032.png"\; state="\{\{state\}\}">arg</figure-callout>}\underset{}{\underset{}{\underset{}{\max }}}\underset{0\&le;\mathrm{\&tau;}\&le;1}{\underset{0\&le;\mathrm{\&kappa;}\&le;1}{\underset{0\&le;\mathrm{\&alpha;}\&le;1}{}}}\left\{R_{\mathrm{SCNOR}}(\mathrm{\&alpha;},\mathrm{\&kappa;},\mathrm{\&tau;})\right\}$

Method for solving can be any in following method:

Method a, the method for exhaustion: exhaustive all parameter configuration tlv triple (α, κ, τ), then choose and make function R _SCNOR(α, κ, τ) gets peaked tlv triple (α, κ, τ) as the most optimized parameter.

Method b, setting time slot allocation ratio τ=0.5, R _{SC NOR}(α, κ, τ=0.5) can adopt following formula to calculate and obtain

κ＝min(κ ₁，max(κ ₂，κ ₃))

${\mathrm{\&kappa;}}_1=\min (1,\frac{1}{2}+\frac{{\mathrm{\&gamma;}}_{\mathrm{<figure-callout\; id="2"\; label="RD"\; filenames="H2009100789628E00021.png,H2009100789628E00031.png"\; state="\{\{state\}\}">RD</figure-callout>}}}{2{\mathrm{\&gamma;}}_{\mathrm{SD}}})$

${\mathrm{\&kappa;}}_2=\frac{-B-\sqrt{B^2-4\mathrm{AC}}}{2A}---\left(2\right)$

${\mathrm{\&kappa;}}_3=\frac{1}{2}+\frac{1}{4}(\frac{1}{{\mathrm{\&gamma;}}_{\mathrm{SD}}}-\frac{1}{{\mathrm{\&gamma;}}_{\mathrm{SR}}})$

Parameter A, B and C in formula (2) are shown below respectively.

$A=4({\mathrm{\&gamma;}}_{\mathrm{SD}}^2-{\mathrm{\&gamma;}}_{\mathrm{SR}}{\mathrm{\&gamma;}}_{\mathrm{SD}})$

$B=({4{\mathrm{\&gamma;}}_{\mathrm{SR}}{\mathrm{\&gamma;}}_{\mathrm{SD}}-4\mathrm{\&gamma;}}_{\mathrm{SD}}^2-2{\mathrm{\&gamma;}}_{\mathrm{SR}}{-2\mathrm{\&gamma;}}_{\mathrm{SD}}-4{\mathrm{\&gamma;}}_{\mathrm{SD}}{\mathrm{\&gamma;}}_{\mathrm{RD}})---\left(3\right)$

C＝-2γ _RD

γ wherein _RDBe the signal to noise ratio of Relay to Destination, γ _RDBe the signal to noise ratio of Source to Destination; γ _SRBe the signal to noise ratio of Source to Relay.

Method C, when given κ (concrete acquisition methods see formula (2)), supercomposed coding power division factor-alpha satisfies following equation.

${\mathrm{\&alpha;}}^{*}=1-\frac{{\mathrm{\&gamma;}}_{\mathrm{RD}}}{\mathrm{\&kappa;}{\mathrm{\&gamma;}}_{\mathrm{SR}}(1+2(1-\mathrm{\&kappa;}){\mathrm{\&gamma;}}_{\mathrm{SD}})}---\left(4\right)$

Find by research, as 0≤γ _RD＜Γ ' ₀The time, the power division factor-alpha is: α=α ^*

Find by research, when ${\mathrm{\&gamma;}}_{\mathrm{SD}}>{\mathrm{\&Gamma;}}_0^{\&prime;}=\frac{{\mathrm{\&gamma;}}_{\mathrm{<figure-callout\; id="1"\; label="SR"\; filenames="H2009100789628E00031.png,H2009100789628E00032.png"\; state="\{\{state\}\}">SR</figure-callout>}}}{1+2(1-{\mathrm{\&alpha;}}^{*})\mathrm{\&kappa;}{\mathrm{\&gamma;}}_{\mathrm{SR}}}$ The time, belong to as shown in the formula α in span shown in (5) and can make R _{SC NOR}The capacity of (α, κ, τ) obtains identical maximum.

α∈U ₁∩U ₂∩U ₃

${\mathrm{<figure-callout\; id="1"\; label="U"\; filenames="H2009100789628E00031.png,H2009100789628E00032.png"\; state="\{\{state\}\}">U</figure-callout>}}_1=\left\{\begin{array}{cc}[0,\frac{V-1}{2\mathrm{\&kappa;}({\mathrm{\&gamma;}}_{\mathrm{SR}}-{\mathrm{\&gamma;}}_{\mathrm{SD}}V)}]& {\mathrm{\&gamma;}}_{\mathrm{SR}}>{\mathrm{\&gamma;}}_{\mathrm{SD}}V\\ [\frac{V-1}{2\mathrm{\&kappa;}({\mathrm{\&gamma;}}_{\mathrm{SR}}-{\mathrm{\&gamma;}}_{\mathrm{SD}}V)},1]& {\mathrm{\&gamma;}}_{\mathrm{SR}}<{\mathrm{\&gamma;}}_{\mathrm{SD}}V\end{array}\right.$

$V=1+\frac{2{\mathrm{\&gamma;}}_{\mathrm{<figure-callout\; id="1"\; label="RD"\; filenames="H2009100789628E00031.png,H2009100789628E00032.png"\; state="\{\{state\}\}">RD</figure-callout>}}}{1+2(1-\mathrm{\&kappa;}){\mathrm{\&gamma;}}_{\mathrm{SD}}}---\left(5\right)$

${\mathrm{<figure-callout\; id="2"\; label="U"\; filenames="H2009100789628E00021.png,H2009100789628E00031.png"\; state="\{\{state\}\}">U</figure-callout>}}_2=[\mathrm{0,1}+\frac{1}{2\mathrm{\&kappa;}}(\frac{1}{{\mathrm{\&gamma;}}_{\mathrm{SR}}}-\frac{1}{{\mathrm{\&gamma;}}_{\mathrm{SD}}})]$

${\mathrm{<figure-callout\; id="3"\; label="U"\; filenames="H2009100789628E00031.png"\; state="\{\{state\}\}">U</figure-callout>}}_3=[1-\frac{{\mathrm{\&gamma;}}_{\mathrm{RD}}}{\mathrm{\&kappa;}{\mathrm{\&gamma;}}_{\mathrm{SR}}(1+2(1-\mathrm{\&kappa;}){\mathrm{\&gamma;}}_{\mathrm{SD}})},1]$

And the channel capacity that adopts the described method of background technology to obtain is,

$R_{\mathrm{SC\; OR}}=\underset{0\&le;\mathrm{\&alpha;}\&le;1}{\mathrm{<figure-callout\; id="0"\; label="max"\; filenames="H2009100789628E00031.png,H2009100789628E00032.png"\; state="\{\{state\}\}">max</figure-callout>}}\{R_b\left(\mathrm{\&alpha;}\right)+R_s\left(\mathrm{\&alpha;}\right)\}$

$R_b\left(\mathrm{\&alpha;}\right)=0.25\min ({\log }_2(1+2\mathrm{\&alpha;}{\mathrm{\&gamma;}}_{\mathrm{SD}}),{\log }_2(1+\frac{2\mathrm{\&alpha;}{\mathrm{\&gamma;}}_{\mathrm{<figure-callout\; id="1"\; label="SR"\; filenames="H2009100789628E00031.png,H2009100789628E00032.png"\; state="\{\{state\}\}">SR</figure-callout>}}}{1+2(1-\mathrm{\&alpha;}){\mathrm{\&gamma;}}_{\mathrm{SR}}}))---\left(6\right)$

R _s(α)＝0.25min(log ₂(1+2(1-α)γ _SR)，log ₂(1+2γ _RD))

Channel capacity in above-mentioned formula (6) is function R _{SC NOR}(α, κ, τ) in κ=1, special case in τ=0.5 situation, be not more than the global maximum of function due to the function local maximum, so the channel capacity in formula (6) must be not more than the channel capacity in formula (1), namely channel capacity of the prior art must be not more than the channel capacity in the present embodiment, thereby the scheme of the present embodiment has the larger channel capacity of acquisition, reduces the characteristics of capacitance loss.

The technique effect of the present embodiment is described below by experimental data, and proof, specifically referring to Fig. 3, drawn in Fig. 3 at SR signal to noise ratio γ by experiment _SR=15dB, RD signal to noise ratio γ _RDThan SD signal to noise ratio γ _SDDuring large 5dB, the present embodiment described based on the nonopiate trunking capacity of supercomposed coding along with SD signal to noise ratio γ _SDThe curve that changes (curve of mark square frame in figure).Can find under signal to noise ratio scene as above by Fig. 3, as SD signal to noise ratio γ _SDDuring greater than 3dB, the channel capacity of the technical scheme that the present embodiment provides (the tetragonal curve of mark in figure) will obvious channel capacity greater than background technology (curve of mark triangle in figure).

Show by experiment, under the condition of slow fading channel, the technical scheme that the present embodiment provides also has the low characteristics of outage probability under identical channel condition, specifically can be shown in Figure 4, provided technical scheme that the present embodiment provides and background technology in Fig. 4 at speed R ₀Outage probability comparison curves under=0.5/1.0/1.6bps/Hz can find that therefrom this enforcement technical scheme can effectively must improve the Outage probability of distributed antenna of relaying under high rate data transmission under the slow fading condition.

In sum, adopt the described method of the present embodiment also to have the larger channel capacity of acquisition, reduce the characteristics of capacitance loss, and also have the low characteristics of outage probability under the condition of slow fading channel.

The specific embodiment of the invention provides another embodiment, and the present embodiment also provides a kind of method for transmitting signals based on relaying, and the technology scene that the present embodiment is realized is that the method is completed between Source, Relay and Destination; Here suppose that data message waiting for transmission is 6bit, the information of 6bit is divided into 3 bits pair, the QPSK constellation of each bit to a corresponding power normalization, concrete expression is respectively, X ₁₁, X ₁₂, X ₂, X wherein ₁₁Be signal corresponding to the information of direct transferring; X ₁₂Be the signal of intermediate data correspondence in time slot Slot 1, wherein X ₁₁, X ₁₂Be two separate signals; X ₂It is the second corresponding signal of data message; This X ₁₁, X ₁₂, X ₂The concrete form of expression as shown in Figure 5; In figure, S represents Source, and D represents Destination, and R represents Relay; And signal corresponding to the first data message that Source broadcasts in Slot 1 $X_1=\sqrt{\frac{\mathrm{\&kappa;}{P}_S}{\mathrm{\&tau;}}}[\sqrt{\mathrm{\&alpha;}}{X}_{11}+(1-\sqrt{\mathrm{\&alpha;}})X_{12}];$ The method as shown in Figure 6, comprises the steps:

Step 61, Source are in Slot 1 broadcasting $X_{}$ ${}_1=\sqrt{\frac{\mathrm{\&kappa;}{P}_S}{\mathrm{\&tau;}}}[\sqrt{\mathrm{\&alpha;}}{X}_{11}+(1-\sqrt{\mathrm{\&alpha;}})X_{12}];$ And send X at Slot 2 ₂

Step 62, Relay and Destination receive Source at the X of Slot 1 broadcasting ₁

Step 63, Relay receive X at Slot 1 ₁And parsing X ₁Obtain X ₁₂And send intermediate data at the corresponding signal of Slot 2 when Slot 2 ${X_{12}}^{,}=\sqrt{\frac{P_R}{1-\mathrm{\&tau;}}}{X}_{12};$

Step 64, Destination receive X ₁₂And X ₂, and resolve X ₁₂Obtain X ₁₂After, according to the X that parses ₁₂And by SIC from X ₁Middle acquisition X ₁₁

Step 65, with X ₁₁, X ₁₂And X ₂Combine and obtain data message waiting for transmission.

The method that the present embodiment provides is transmitted data message waiting for transmission by the QPSK mode, improve the purpose of channel capacity thereby reached, and has the advantages that to reduce capacitance loss.

The specific embodiment of the invention also provides an embodiment, and the present embodiment also provides a kind of method for transmitting signals based on relaying, and the technology scene that the present embodiment is realized is that the method is completed between Source, Relay and Destination; Here suppose that data message waiting for transmission is 6bit, the information with 6bit is divided into the first data message of a 4bit and the second data message of a 2bit, 4bit the first data message adopts 16PSK (PSK, phase shift keying) modulation signal to transmit, and is expressed as X ₁16 constellation point in the 16PSK constellation are divided into 4 constellation point subsets that respectively differ 22.5 degree, have 4 to differ 90 degree constellation point in every subset, subset is cut apart as shown in Figure 7; The signal that intermediate data is corresponding is a QPSK (quarternary phase-shift keying (QPSK)) constellation, is expressed as X ₁₂, the subset in each constellation point presentation graphs 7; The second data message of 2bit adopts the qpsk modulation signal transmission table to be shown X ₂This X ₁₁, X ₁₂, X ₂The concrete form of expression as shown in Figure 8; In figure, S represents Source, and D represents Destination, and R represents Relay; The method as shown in Figure 9, comprises the steps:

Step 91, Source are at Slot 1 broadcasting X ₁And send X at Slot 2 ₂

Step 92, Relay and Destination receive Source at the X of Slot 1 broadcasting ₁

Step 93, Relay receive X at Slot 1 ₁And parsing X ₁Obtain X ₁The constellation subset at place; And determine signal X corresponding to intermediate data according to the constellation subset at place ₁₂, send X when Slot 2 ₁₂

Step 94, Destination receive X ₁₂And X ₂, and resolve X ₁₂Obtain X ₁₂After the constellation subset of representative, according to the reception signal in Slot 1 at X ₁₂Resolve signal X corresponding to the first data message in the constellation subset of representative ₁, obtain X ₁The first data message of representative.

Step 95, parsing X ₂Obtain X ₂The second data message of representative combines the first data message and the second data message and obtains data message waiting for transmission.

The method that the present embodiment provides is transmitted the first data message in data message waiting for transmission by the 16PSK mode, improve the purpose of channel capacity thereby reached, and has the advantages that to reduce capacitance loss.

The specific embodiment of the invention also provides a kind of receiving system that transmits based on the signal of relaying, and this installs as shown in figure 10, comprise,

Receiving element 101 is used for signal corresponding to the first data message in the data waiting for transmission of time slot Slot 1 reception information source Source broadcasting, and this data message waiting for transmission comprises the first data message and the second data message; This receiving element 101 also is used for receiving at Slot 2 signal corresponding to this second data message that Source sends, and receives the corresponding signal of intermediate data that relaying Relay sends; This intermediate data is the signal acquisition corresponding according to this first data message;

Resolution unit 102, be used for resolving respectively signal acquisition intermediate data corresponding to the corresponding signal of this intermediate data and the second data message and the second data message, and obtain this first data message according to this intermediate data from signal corresponding to this first data message;

Synthesis unit 103, being used for this first data message and this second data message are combined obtains this data message waiting for transmission.

Optionally, this resolution unit 102 specifically can comprise:

Parsing module 1021 is used for resolving the corresponding signal of this intermediate data and corresponding signal acquisition intermediate data and the second data message of the second data message; Concrete analytic method can reference method embodiment appropriate section description, repeat no more.

Acquisition module 1022 is used for obtaining the first data message according to this intermediate data and by list decoding operation from the corresponding signal of this first data message.

The receiving system that the signal based on relaying that the present embodiment provides transmits can be the base station, can be perhaps terminal.

the receiving system that the signal based on relaying that the present embodiment provides transmits receives the first corresponding signal of data message by receiving element 101 in Slot 1, and receive the second corresponding signal of data message in Slot 2, resolution unit 102 is resolved the corresponding signal of this intermediate data and corresponding signal acquisition intermediate data and the second data message of the second data message, and after obtaining this first data message according to this intermediate data from signal corresponding to this first data message, merge cells 103 combines the first data message and the second data message and obtains this information waiting for transmission, thereby reach the purpose that improves channel capacity, and have the advantages that to reduce capacitance loss.

The specific embodiment of the invention also provides a kind of dispensing device that transmits based on the signal of relaying, and this installs as shown in figure 11, specifically comprises:

Transmitting element 1101 is used for signal corresponding to the first data message in Slot 1 broadcasting data message waiting for transmission; This data message waiting for transmission comprises the first data message and the second data message; Transmitting element 1101 also is used for sending signal corresponding to described the second data message at Slot 2.

Optionally, this device can also comprise:

Setup unit 1102 is for the Slot 1 and the Slot 2 that set the identical duration;

Adjustment unit 1103 is used for adjusting signal transmission power P corresponding to the first data message _S ⁽¹⁾Transmitting power P with signal corresponding to the second data message _S ⁽²⁾, concrete method of adjustment can referring to the associated description in embodiment of the method, not given unnecessary details here.

The dispensing device that the signal based on relaying that the present embodiment provides transmits can be the base station, can be perhaps terminal.

Signal corresponding to the first data message in the data message waiting for transmission of broadcasting in Slot 1 by transmitting element 1101 based on the dispensing device of the signal of relaying transmission that the specific embodiment of the invention provides; This data message waiting for transmission comprises the first data message and the second data message; And send signal corresponding to described the second data message in Slot 2, thus supported to reach based on the receiving system of the signal transmission of relaying the purpose that improves channel capacity, and have the purpose that reduces capacitance loss.

The specific embodiment of the invention also provides a kind of relay that transmits based on the signal of relaying, and this installs as shown in figure 12, comprising:

Receiving element 1201 is used for signal corresponding to the first data message in the data message waiting for transmission of time slot Slot 1 reception information source Source broadcasting;

Resolution unit 1202 is used for resolving signal acquisition the first data message corresponding to this first data message, and inquires corresponding group of information of this first data message according to this first data message, and this group information is intermediate data;

Transmitting element 1203 is used at time slot Slot 2, the corresponding signal of this intermediate data being sent.

The specific embodiment of the invention provides receives signal corresponding to the first data message in the data message waiting for transmission that information source Source broadcasts based on the relay of the signal of relaying transmission by receiving element 1201 in time slot Slot 1 after; Resolution unit 1202 is resolved signal acquisition the first data message corresponding to this first data message, and inquire about corresponding group of information of this first data message, and will organize the corresponding signal of information (being intermediate data) by transmitting element 1203 send in Slot 2, thereby supported to reach based on the receiving system of the signal of relaying transmission the purpose that improves channel capacity, and had the purpose that reduces capacitance loss.

It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.

One of ordinary skill in the art will appreciate that all or part of step that realizes in above-described embodiment method can come the relevant hardware of instruction complete by program, described program can be stored in a kind of computer-readable recording medium, this program comprises step of embodiment of the method one or a combination set of when carrying out.

In sum, the technical scheme that the specific embodiment of the invention provides has the increase channel capacity, reduces the advantage of capacitance loss.

The above; only be the better embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the embodiment of the present invention discloses; the variation that can expect easily or replacement are within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.

Claims (11)

1. the method for transmitting signals based on relaying, is characterized in that, comprise,

Signal corresponding to the first data message in time slot Slot 1 in the data message waiting for transmission of reception information source Source broadcasting, described data message waiting for transmission comprises described the first data message and the second data message;

Receive signal corresponding to described the second data message that described Source sends in time slot Slot 2, and receiving the corresponding signal of intermediate data that relaying Relay sends, described intermediate data is the described Relay signal acquisition corresponding according to described the first data message that receives;

Resolve respectively the corresponding signal of described intermediate data and signal corresponding to described the second data message, obtain described intermediate data and described the second data message, and obtain described the first data message according to described intermediate data from signal corresponding to described the first data message;

Described the first data message and described the second data message are combined obtain described data message waiting for transmission;

Before the signal that described first data message of the described Source broadcasting of reception is corresponding in time slot Slot 1, described method also comprises:

Described Source sets Slot 1 and the Slot 2 of identical duration, and adjusts signal transmission power corresponding to described the first data message

Transmitting power with signal corresponding to described the second data message

Concrete method of adjustment is:

τ=0.5 wherein, P _SBe the average transmit power of Source within the whole transmission cycle;

κ=min(κ ₁,max(κ ₂,κ ₃))

Parameter A wherein, B and C are shown below respectively:

C=-2γ _RD

γ wherein _RDBe the signal to noise ratio of Relay to purpose stay of two nights Destination, γ _SDBe the signal to noise ratio of Source to Destination; γ _SRBe the signal to noise ratio of Source to Relay.

2. method according to claim 1, is characterized in that, describedly obtains described the first data message according to described intermediate data from signal corresponding to described the first data message and comprise:

Obtain described the first data message according to described intermediate data and by list decoding list decoding operation from described the first corresponding signal of data message.

3. method according to claim 1, it is characterized in that, described relay obtains described intermediate data and specifically comprises: described Relay resolves described the first data message of signal acquisition corresponding to described the first data message, and inquiring corresponding group of information of described the first data message according to described the first data message, this group information is described intermediate data.

4. method according to claim 1, is characterized in that, the first corresponding signal of data message is the signal that the linear superposition coding consists of as described, and described method specifically comprises:

The signal that described the first data message is corresponding is formed by stacking by the information of direct transferring corresponding signal and intermediate data corresponding signal linearity in Slot 1;

The corresponding signal of described intermediate data that the described Relay that receives in Slot 2 sends is the signal of described intermediate data correspondence in Slot 2.

5. method according to claim 4, is characterized in that, obtains described intermediate data and described the second data message specifically comprises:

Described the second corresponding signal of data message is obtained described intermediate data as interference signal and by counteracting serial interference SIC, described intermediate data is obtained described the second data message at the signal of Slot 2 correspondences as interference signal and by SIC.

6. method according to claim 5, is characterized in that, obtains described the first data message and specifically comprise:

By described intermediate data, the signal of the described intermediate data of reconstruct correspondence in Slot 1 obtains the described information that direct transfers with described intermediate data corresponding signal in Slot 1 as interference signal and by SIC;

The described information that direct transfers, described intermediate data are combined obtain described the first data message.

7. method according to claim 4, is characterized in that, described relay obtains described intermediate data and specifically comprises:

Described Relay resolves signal corresponding to the first data with intermediate data corresponding signal in Slot 1 as interference signal and obtains the described information that direct transfers, re-construct the corresponding signal of the described information that direct transfers according to the described information of direct transferring, the corresponding signal of the described information that direct transfers that deducts reconstruct with signal corresponding to described the first data obtains described intermediate data corresponding signal in Slot 1, and the signal of resolving described intermediate data correspondence in Slot 1 obtains described intermediate data.

8. method according to claim 4, it is characterized in that, receive the described first corresponding signal of data message of Source broadcasting in Slot 1 before, described method also comprises, described Source sets Slot 1 and the Slot 2 of identical duration, and adjust the transmitting power of signal corresponding to the separate information that direct transfers and intermediate data corresponding signal in Slot 1, be specially:

As 0≤γ _SD＜Γ ' ₀The time, the power division factor-alpha of described transmitting power is:

Wherein

Work as γ _SDΓ ' ₀The time, the power division factor-alpha of described transmitting power can be chosen the arbitrary value in following number field:

α∈U ₁∩U ₂∩U ₃

Above-mentioned various in, γ _RDBe the signal to noise ratio of Relay to Destination, γ _SDBe the signal to noise ratio of Source to Destination; γ _SRBe the signal to noise ratio of Source to Relay;

κ=min(κ ₁,max(κ ₂,κ ₃))

Parameter A wherein, B and C are shown below respectively:

C=-2γ _RD

The symbol power of wherein, launching at Slot 1

In, the signal that the information that direct transfers is corresponding

Proportion is α, the signal of intermediate data correspondence in Slot 1

Proportion is 1-α.

9. method according to claim 1, it is characterized in that, the first corresponding signal of data message adopts 16 phase shift keying psk modulation signals as described, described the second corresponding signal of data message adopts the quarternary phase-shift keying (QPSK) qpsk modulation signal, the signal that described intermediate data is corresponding is to resolve described 16PSK modulation signal by described Relay to obtain constellation subset corresponding to described 16PSK modulation signal, and the constellation subset corresponding according to described 16PSK modulation signal decision.

10. method according to claim 9, is characterized in that, obtains described the first data message and be specially:

Resolve after signal corresponding to described intermediate data obtain the constellation subset of signal representative corresponding to described intermediate data, resolve described 16PSK modulation signal according to the reception signal in Slot 1 in the constellation subset of signal representative corresponding to described intermediate data, obtain described the first data message.

11. the dispensing device based on the signal transmission of relaying is characterized in that, described device comprises:

Transmitting element is used for signal corresponding to the first data message in time slot Slot 1 broadcasting data message waiting for transmission; Described data message waiting for transmission comprises the first data message and the second data message; Described transmitting element also is used for sending signal corresponding to described the second data message at time slot Slot 2;

Before the signal that described the first data message of broadcasting is corresponding in time slot Slot 1:

Information source Source sets Slot 1 and the Slot 2 of identical duration, and adjusts signal transmission power corresponding to described the first data message

Transmitting power with signal corresponding to described the second data message

Concrete method of adjustment is:

τ=0.5 wherein, P _SBe the average transmit power of Source within the whole transmission cycle;

κ=min(κ ₁,max(κ ₂,κ ₃))

Parameter A wherein, B and C are shown below respectively:

C=-2γ _RD

γ wherein _RDBe the signal to noise ratio of relaying Relay to purpose stay of two nights Destination, γ _SDBe the signal to noise ratio of Source to Destination; γ _SRBe the signal to noise ratio of Source to Relay;

Described device also comprises:

Setup unit is for the Slot 1 and the Slot 2 that set the identical duration;

Adjustment unit is used for adjusting signal transmission power corresponding to the first data message Transmitting power with signal corresponding to the second data message

Described transmitting element is used for sending described the first data message and signal corresponding to described the second data message according to the transmitted power that the time slot of described setup unit setting and described adjustment unit are adjusted.

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