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Dual-jump full-duplex DF relay system optimization power distribution method for total power limitation

An optimal power and relay system technology, applied in the field of wireless transmission, can solve the problem of wasting wireless resources

Active Publication Date: 2014-10-08
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

Although Multiple Input Multiple Output (MIMO) technology has greatly improved the performance and capacity of wireless communication systems, and has developed rapidly in recent years, it has become one of the core technologies of the new generation of wireless communication. However, 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 will obviously waste half of the wireless resources

Method used

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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 channel of signal propagation 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] γ ‾ i , j = Ω ...

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 invention discloses a dual-jump full-duplex DF relay system optimization power distribution method for total power limitation, and relates to the technical field of wireless transmission. The dual-jump full-duplex DF relay system optimization power distribution method solves the problem that the total power of a dual-jump full-duplex DF relay system is limited. The method comprises the steps that the end-to-end outage probability Po (gamma th) is solved; when the total transmitted power limitation of nodes is Ptotal, a dual-jump full-duplex DF relay optimization power distribution strategy is equivalent to nonlinear optimization; according to the process of optimization power distribution, a cost function J (Po, P1, gamma) is set, the gamma is an intermediate parameter, the gradient of the cost function J (Po, P1, gamma) is obtained, an iteration precision threshold value epsilon is set, initialization is carried out on the Po and the P1 by utilizing equal power distribution, and when the equations that |Po-Po*|<epsilon, Po=Po* and P1=Ptotal-Po* are met, a dual-jump full-duplex DF relay optimization power distribution result for the total power limitation is obtained. The dual-jump full-duplex DF relay system optimization power distribution method is suitable for optimization power distribution of the dual-jump full-duplex DF relay system, so that the end-to-end outage performance of the system achieves the optimization.

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 Applications(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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