认知无线电网络的一种协作频谱感知方案

Cooperative Spectrum Sensing Scheme for Cognitive Radio Networks

认知无线电技术能够让非授权用户利用已经分配给授权用户的频段。为了不对首要用户的工作造成干扰,认知用户需要对频谱进行不间断的监测来判断首要用户是否存在。因此,频谱的感知是认知无线电技术的关键。协作频谱感知能够充分的利用网络资源,提高网络中的认知用户的检测概率。文中笔者简单地介绍了一种协作频谱感知的方案。仿真结果表明,通过该方法能够提高网络中认知用户的检测概率,提高网络的检测灵敏度。

The cognitive users in cognitive networks need to continuously monitor spectrum and detect the presence of primary （licensed） users. Cooperative sensing can make good use of network resource, obtain higher detection probability. In this paper, a brief introduction of the scheme for cooperative sensing is given. Simulation results show that cooperative sensing scheme can improve the detection probability of the cognitive users and raise the sensitivity gain of the network.