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Optimal power allocation method for double-hop full-duplex df relay system with limited total power

A relay system, the technology of optimal power, applied in the field of wireless transmission, can solve the problem of waste of wireless resources and so on

Active Publication Date: 2018-03-27
HARBIN INST OF TECH
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Problems solved by technology

Although the multiple input multiple output (MIMO) technology has greatly improved the performance and capacity of the wireless communication system, and has developed rapidly in recent years, it has become one of the core technologies of the new generation of wireless communication, but the existing In the communication system, regardless of frequency division duplex (Frequency Division Duplex, FDD) mode or time division duplex (Time Division Duplex, TDD) mode, by occupying different resources to achieve uplink and downlink communication to avoid interference between uplink and downlink communications , which obviously wastes half of the wireless resources

Method used

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  • Optimal power allocation method for double-hop full-duplex df relay system with limited total power
  • Optimal power allocation method for double-hop full-duplex df relay system with limited total power
  • Optimal power allocation method for double-hop full-duplex df relay system with limited total power

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specific Embodiment approach 1

[0044] Specific implementation mode 1: For the optimal power allocation method of the double-hop full-duplex DF relay with limited total power, the system model of the double-hop full-duplex DF relay system is as follows figure 1 As shown, the double-hop full-duplex DF relay system consists of a source node (R 0 ), the relay node (R 1 ) and the destination node (R 2 ), the signal propagation channel is a Rayleigh fading channel, assuming p i for node R i (i=0,1) the power of the transmitted signal, that is, the source node R 0 The transmit power is p 0 , the relay node R 1 The transmit power is p 1 , when the free-space propagation loss is not considered, the node R j (j=1,2) received from node R i (i=0,1) the average signal-to-noise ratio of the signal after the fading channel for:

[0045]

[0046] where Ω i,j is the mean square value of the modulus of the channel fading coefficient, N 0 is the noise power;

[0047] The realization process of described meth...

specific Embodiment approach 2

[0081] Embodiment 2: The value of the iteration accuracy threshold ε in step 5 of the method is less than or equal to 0.01. Other steps are the same as in the first embodiment.

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Abstract

The optimal power allocation method for a double-hop full-duplex DF relay system with limited total power belongs to the field of wireless transmission technology. The present invention is to solve the total power limitation problem of a double-hop full-duplex decoding and forwarding relay (Decode-and-Forward, DF) system. Solve for the end-to-end outage probability Po(γth); when the total transmit power of the node is limited to pTotal, the optimal power allocation strategy of the double-hop full-duplex DF relay is equivalent to nonlinear optimization; the process of optimal power allocation is: Set the cost function J (p0, p1, λ), where λ is the intermediate parameter, find the gradient of the cost function J (p0, p1, λ), set the iteration accuracy threshold ε, and use equal power distribution to calculate p0 and p1 is initialized, and the judgment condition is * and is the optimal power allocation result for the two-hop full-duplex DF relay with limited total power. The invention is suitable for optimal power distribution of a double-hop full-duplex DF relay system, so that the end-to-end interruption performance of the system can be optimized.

Description

technical field [0001] The invention relates to a power allocation method and belongs to the technical field of wireless transmission. Background technique [0002] The fifth generation of mobile communication will provide users with higher data transmission rate and better service quality. However, to achieve higher rates and greater capacity on limited spectrum resources, wireless transmission technologies with extremely high spectrum efficiency must be used. Although the multiple input multiple output (MIMO) technology has greatly improved the performance and capacity of the wireless communication system, and has developed rapidly in recent years, it has become one of the core technologies of the new generation of wireless communication, but the existing In the communication system, regardless of frequency division duplex (Frequency Division Duplex, FDD) mode or time division duplex (Time Division Duplex, TDD) mode, by occupying different resources to achieve uplink and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/08H04W72/54
CPCY02D30/70
Inventor 韩帅陈雷孟维晓
Owner HARBIN INST OF TECH
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