Optimal power allocation method for double-hop full-duplex df relay system with limited power of a single node

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: 2017-06-23
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 power of a single node
  • Optimal power allocation method for double-hop full-duplex df relay system with limited power of a single node
  • Optimal power allocation method for double-hop full-duplex df relay system with limited power of a single node

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specific Embodiment approach 1

[0051] Specific implementation mode one: as figure 1 As shown, an optimal power allocation method for a double-hop full-duplex DF relay system with limited power of a single node, the double-hop full-duplex DF relay system is composed of source node R 0 , the relay node R 1 and destination node R 2Composition, 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:

[0052]

[0053] where Ω i,j is the mean square value of the modulus of the channel fading coefficient, N 0 is the noise power;

[0054] The realization process of described method is:

[0055] Step 1. Solve the end-to-end outage prob...

specific Embodiment approach 2

[0096] Embodiment 2: In step 4c, the value of the precision threshold ε is generally less than or equal to 0.01 in order to ensure the calculation speed and calculation precision. 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 single-node 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 power of a single node 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; optimization power distribution is equivalent to nonlinear optimization; according to the specific process of the optimization power distribution, an object function f (Po, P1) is set, an iteration precision threshold value epsilon is set, initialization is carried out on Po by utilizing equal power distribution, and in other words, the equation that Po=Ptotal / 2 is met; an intermediate variable is made to be equal to the Po, and the Po is updated by the adoption of an iteration method; when the equation that |Po-Po*|<epsilon is met, the optimization power distribution scheme 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 relates 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): H04W52/34
Inventor 韩帅陈雷孟维晓
Owner HARBIN INST OF TECH
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