Simplified Relay Selection and Power Allocation in Cooperative Cognitive Radio Systems

In this paper, we investigate joint relay selection and power allocation to maximize system throughput with limited interference to licensed (primary) users in cognitive radio (CR) systems. As these two problems are coupled together, we first develop an optimal approach based on the dual method and...

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Bibliographic Details
Published inIEEE transactions on wireless communications Vol. 10; no. 1; pp. 33 - 36
Main Authors Liying Li, Xiangwei Zhou, Hongbing Xu, Li, G Y, Wang, D, Soong, A
Format Journal Article
LanguageEnglish
Published New York, NY IEEE 01.01.2011
Institute of Electrical and Electronics Engineers
Subjects
Applied sciences
Cognitive radio
Cooperative cognitive radio system
Exact sciences and technology
Interference
power allocation
Radiocommunication specific techniques
Radiocommunications
relay selection
Relays
Resource management
Simulation
system throughput
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Throughput
Transmission and modulation (techniques and equipments)
Performance evaluation
Relay
Simulation
relay selection
system throughput
Cooperative systems
Information rate
Cooperative cognitive radio system
Power allocation
Information transmission
Cognitive system
Software radio
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Summary:In this paper, we investigate joint relay selection and power allocation to maximize system throughput with limited interference to licensed (primary) users in cognitive radio (CR) systems. As these two problems are coupled together, we first develop an optimal approach based on the dual method and then propose a suboptimal approach to reduce complexity while maintaining reasonable performance. From our simulation results, the proposed approaches can increase the system throughput by over 50%.
ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2010.101810.100311