Capacity of Cognitive Radio under Outage Constraint with Partial Channel Knowledge

摘要：

This paper considers a cognitive radio network where a secondary user (SU) shares the same narrow spectrum band that is originally licensed to the primary user (PU) as long as the interference caused by the SU to the latter is below a prescribed threshold. At the SU, channel state information (CSI) is used to regulate the SU transmit power to limit the interference. In this respect, we assume only partial CSI is available to the SU, and investigate the SU ergodic capacity under the PU outage loss constraint as well as the peak/average transmit power constraint in Rayleigh fading channels. In particular, we derive the optimal power allocation to achieve the SU ergodic capacity, and further obtain closed-form expressions for the ergodic capacity. Numerical simulations are also given to corroborate our theoretical results.

作者: Yang Liu Ding Xu Zhiyong Feng Qian Li Ping Zhang

作者单位: Key Laboratory of Universal Wireless Communications, Ministry of Education Beijing University of Pos Key Laboratory of Universal Wireless Communications, Ministry of EducationBeijing University of Post

会议类型: 国际会议

会议名称: 2011年无线通信与信号处理国际会议(WCSP 2011)

会议地点: 南京

会议语种:英文

页码: 1-5

在线出版日期: 2011-11-09（万方平台首次上网日期，不代表论文的发表时间）