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Published in: Wireless Personal Communications 3/2016

01-02-2016

Optimal Power Allocation and Relay Selection in Multi-hop Cognitive Relay Networks

Authors: Qixun Zhang, Zhiyong Feng, Tuo Yang, Wei Li

Published in: Wireless Personal Communications | Issue 3/2016

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Abstract

Cognitive relay is able to increase the network coverage and improve the spectral utilization by exploiting vacant spectrum resources. In this paper, the optimal power allocation and relay selection strategies are proposed to improve the data transmission from source to destination in both dual-hop and multi-hop scenarios. The optimal strategy can minimize the total transmission power and maximize the network capacity under outage and interference constraints. Closed-form solutions of proposed strategies are achieved with the network capacity enhancement. Simulation results verify the effectiveness and correctness of proposed power allocation and relay selection strategies in both dual-hop and multi-hop scenarios.

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Metadata
Title
Optimal Power Allocation and Relay Selection in Multi-hop Cognitive Relay Networks
Authors
Qixun Zhang
Zhiyong Feng
Tuo Yang
Wei Li
Publication date
01-02-2016
Publisher
Springer US
Published in
Wireless Personal Communications / Issue 3/2016
Print ISSN: 0929-6212
Electronic ISSN: 1572-834X
DOI
https://doi.org/10.1007/s11277-015-3013-y

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