频谱感知能量检测器的性能分析

被引:4
作者
孙大飞 [1 ,2 ]
宋铁成 [1 ]
吴名 [1 ]
郭洁 [1 ]
顾斌 [1 ]
机构
[1] 东南大学移动通信国家重点实验室
[2] 南京工业大学理学院
关键词
认知无线电; 频谱感知; 能量检测; 时间带宽积;
D O I
10.19335/j.cnki.2095-6649.2012.10.002
中图分类号
TN925 [无线电中继通信、微波通信];
学科分类号
080402 ; 080904 ; 0810 ; 081001 ;
摘要
频谱感知是认知无线电中非常重要的研究课题,它要保证从用户不会对主用户产生干扰。如果没有主用户信号的信息,能量检测是一种最优的频谱感知方法。根据频谱感知能量检测器的系统模型和判决统计量的统计特性,本文推导了能量检测器的虚警概率和检测概率的解析表达式,并进行了仿真验证。仿真结果表明,信噪比和时间带宽积是影响检测性能的两个最重要的因素,且在低信噪比下,通过增加时间带宽积可以显著提高检测性能。
引用
收藏
页码:8 / 13
页数:6
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