Secondary user access based on stochastic link estimation in cognitive radio with fibre-connected distributed antennas

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	Secondary user access based on stochastic link estimation in cognitive radio with fibre-connected distributed antennas
	Ge, Wendong; Ji, Hong; Li, Xi; Leung, Victor C. M.
刊名	IET COMMUNICATIONS
	2013-05-21
卷号	7 期号:8;8 页码:731-737
文献子类	Article
英文摘要	In this study, the authors consider the application of a system architecture called cognitive radio (CR) with fibre-connected distributed antennas in IEEE 802.22 wireless regional area networks (WRANs) as it could bring the benefits of much shorter wireless transmission distances, lower transmission power and the possibility of utilising multi-antenna transmission techniques. In this architecture, the authors study the secondary user (SU) access problem in uplink, where the SU to primary user (PU) link estimation is subject to random errors because PU could not assist link estimation of SU. This SU access problem is divided into two parts: antenna selection and access control. Thus, first antenna selection problem is modelled as a restless bandit problem, which is solved by the primal-dual index heuristic algorithm based on first order relaxation. In addition, the access control problem is modelled as a stochastic knapsack (SASK) problem with random weight, and then relaxed to be a deterministic second order cone programming problem. With the deduced upper bound, the access control problem is solved by the branch and bound algorithm, which yields the SU access based on SASK scheme. Simulation results illustrate the significant performance improvement of SASK scheme, compared with existing SU access methods.
WOS关键词	SYSTEMS
WOS研究方向	Engineering
语种	英语
WOS记录号	WOS:000321733800005
内容类型	期刊论文
源URL	[http://ir.ia.ac.cn/handle/173211/40892]
专题	数字内容技术与服务研究中心_听觉模型与认知计算
推荐引用方式 GB/T 7714	Ge, Wendong,Ji, Hong,Li, Xi,et al. Secondary user access based on stochastic link estimation in cognitive radio with fibre-connected distributed antennas[J]. IET COMMUNICATIONS,2013,7(8;8):731-737.
APA	Ge, Wendong,Ji, Hong,Li, Xi,&Leung, Victor C. M..(2013).Secondary user access based on stochastic link estimation in cognitive radio with fibre-connected distributed antennas.IET COMMUNICATIONS,7(8;8),731-737.
MLA	Ge, Wendong,et al."Secondary user access based on stochastic link estimation in cognitive radio with fibre-connected distributed antennas".IET COMMUNICATIONS 7.8;8(2013):731-737.