瑞利信道中双门限检测算法性能仿真及研究  

Performance of Double Threshold Detection Over Rayleigh Channel

作　　者：姜微[1] 马惠珠 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《计算机仿真》2011年第1期127-130,共4页Computer Simulation

摘　　要：研究无线网络通信,提高信道性能,改进检测方法,感知频谱环境是认知无线电的首要任务,如何在衰落信道中提高频谱的检测性能对现有认知无线电技术提出挑战。采用瑞利信道为典型信道,针对不同的协作感知方法展开研究,确定将一种双门限感知法植入瑞利信道,克服了唯一门限较难确定及系统开销大的问题。通过仿真,结果表明,双门限法与传统检测方法相比,不仅提高了检测概率,且减小了不必要的系统开销。The sensing of spectrum environment is the most important part of cognitive radio system. How to improve the sensing performance callenges the present tecnology of cognitive radio. In this paper, different cooperative detection methods are studied in Rayleigh channels which is the typical fading channels. For overcoming the choosen of exclusive threshold and the problem of system burden, the method of double threshold is applied over Rayleigh channel. Computer simulation results show that double threshold method can improve the detection performance and reduce the system spending unnecessary.

关 键 词：认知无线电 协同感知 瑞利信道 双门限法 

分 类 号：TN92[电子电信—通信与信息系统]