具有天线选择的认知MISO系统中断性能分析

Outage performance of MISO-CR with antenna selection

针对认知MISO系统,分析了三种天线选择方案下次用户的中断性能。与已有文献不同,不仅考虑了次用户对主用户的干扰功率约束,还考虑了次用户发送峰值功率约束和主用户对次用户的干扰。进一步基于不同的天线选择方案,从理论上推导出次用户中断概率的闭合表达式,并通过Monte-Carlo仿真验证理论推导的正确性。仿真结果表明,在瑞利平衰落信道环境中,次用户采用天线选择方案能有效降低次用户的中断概率,避免次用户频繁切换信道。

To improve the performance of multi-input single-output cognitive radio （ MISO-CR ） networks with spectrum sharing model , we propose three transmit antenna selection schemes of minimum interference selection , maximum data power and maximum the received SINR . The cognitive user has to consider not only the interference caused by primary user , as long as the interference temperature constraint at primary user , but the transmit peak power can be limited . In this paper , close-form expressions of the outage are derived under the downlink flat-fading Rayleigh channel conditions .