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认知无线电具有时延约束的干扰功率分析

DOI: 10.13190/j.jbupt.2015.03.023, PP. 130-134

Keywords: 认知无线电,有效容量,时延服务质量,功率控制,Nakagami-m衰落

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Abstract:

为量化认知无线电队列时延与干扰功率之间的关系,提出一种功率分配方案.此方案以最小化主用户接收端平均干扰功率为目标,受限于次用户时延服务质量约束.推导非对称Nakagami-m衰落信道平均干扰功率闭合解.仿真结果表明,干扰功率与时延约束之间存在折中.当时延约束较严格时,认知无线电系统通过天线分集可显著降低次用户对主用户的干扰.

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