Multi-relay cooperative self-adaptive relay selection and power distribution method

An allocation method and self-adaptive technology, applied in the field of wireless communication resource management, can solve problems such as multi-relay amplification and forwarding cooperative adaptive relay selection and power allocation that have not been discussed, and achieve good use effect and reduce BER performance

Inactive Publication Date: 2014-07-23
GUIZHOU UNIV
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  • Abstract
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Problems solved by technology

At present, the transmission power in actual wireless communication is preset or equal power transmission. Academically, many scholars have studied the relay selection and power allocation algorithm of the AF cooperation model for the cooperative multi-relay communication system, but the work that has been done is The relay selection algorithm and the power allocation algorithm are optimized separately; some discuss the joint relay selection and power allocation algorithm, but do not discuss the adaptive relay selection considering the multi-relay amplification and forwarding cooperation under the direct transmission link and power distribution

Method used

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  • Multi-relay cooperative self-adaptive relay selection and power distribution method

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Embodiment Construction

[0020] Embodiment of the present invention: multi-relay cooperative adaptive relay selection and power allocation method,

[0021]

[0022]

[0023] 3) Mememe evolution: generate new frogs according to formulas (10) and (11), record the position of the newly generated frog and calculate its fitness value, if the fitness value of the new frog is higher than the fitness value of the worst frog good, replace the worst frog with the newly spawned frog; otherwise, replace it with p x replace p b , to re-evolve the meme group; if there is still no improvement, a new frog is randomly generated to replace the original frog.

[0024]

[0025] 4) Evolution of the entire frog group: Mix the frogs, that is, the frogs jump between meme groups; Y 1 ，Y 2 ，...,Y m remixed into X ,Right now X={Y k |k=1,2,...,m} . Sort X in descending order and update the best frog in the population p x ;

[0026] 5) Iteration termination condition: if the iteration condition is sati...

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Abstract

The invention discloses a multi-relay cooperative self-adaptive relay selection and power distribution method. A shuffled frog leaping algorithm is introduced into an AF multi-relay cooperative system, path loss is fully considered under the condition that total power is subjected to certain constraint, the maximum average signal to noise ratio of a destination node serves as a target, and the searching advantages of the shuffled frog leaping algorithm are utilized to achieve power distribution of the AF multi-relay cooperative communication system and reduce BER performance of the system.

Description

technical field [0001] The invention relates to the field of wireless communication resource management, in particular to a multi-relay cooperative adaptive relay selection and power allocation method. Background technique [0002] Cooperative relay technology is an effective technology to overcome wireless fading and obtain space diversity gain by forwarding the information transmitted by the sending node to the destination node. Cooperative communication technology can effectively expand the coverage area and improve the system transmission performance, which has attracted much attention. According to the forwarding method of the relay node, the current main protocols are Amplify and Forward and Decode and Forward. [0003] Compared with decoding and forwarding DF, amplification and forwarding AF only needs to directly amplify the information of the source node, the system complexity is low, and it is simple and easy to implement. [0004] Due to the limitation of wireles...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W40/22H04W72/04
CPCY02D30/70
Inventor 刘紫燕唐思腾帅暘冯亮祁佳罗超
Owner GUIZHOU UNIV
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