空军工程大学学报（自然科学版）2016，Vol.17Issue(5)：76-82,7.DOI:10.3969/j.issn.1009-3516.2016.05.014
联合干扰功率限制下的认知中继网络性能分析
An Analysis of the Performance in Cognitive Relay Networks Based on a Joint Interference Power Constraints
摘要
Abstract
To guarantee the reliable communications of the primary user (PU)in cognitive relay networks under underlay spectrum sharing constraints,the transmission powers of the secondary source and relays must satisfy the needs of the interference power constraints at the PU receiver.With both peak and average interference power limits,the paper analyzes the performance of selection cooperative decode-and-for-ward (DF)relaying in underlay cognitive relay networks.Particularly,taken the correlations among the received signal to noise ratios (SNRs)of the first hop in the relaying transmission caused by interference power constraint imposed by the primary receiver into account,the paper derives exact closed-form ex-pressions for the outage probability and channel capacity of the secondary user (SU)under condition of Rayleigh fading channels.The simulation results show that the analytical outcomes of the outage probabili-ty and channel capacity match well with the simulation results,the performance of the SU is degraded due to the dependence of the links between the SU source and the PU receiver in the context of cognitive radio environment with spectrum sharing constraints.Importantly,the consideration of the correlations im-proves the system performance as much as 2 dB.关键词
认知中继网络/频谱共享/瑞利衰落/中断概率/信道容量Key words
cognitive relay networks/spectrum sharing/Rayleigh fading/outage probability/channel ca-pacity分类
信息技术与安全科学引用本文复制引用
黄仰超,褚鹏,朱锐,孟庆微..联合干扰功率限制下的认知中继网络性能分析[J].空军工程大学学报（自然科学版）,2016,17(5):76-82,7.基金项目
国家自然科学基金(61401499) （61401499）
