频谱感知中的协作检测方法分析

Research on Cooperative Detection in Spectrum Sensing

针对认知无线电频谱感知中单用户检测时的阴影衰落、隐藏终端等问题,介绍了协作检测的结构,对单用户的能量检测,信息融合进行了分析。提出了一种多门限多用户的协作检测方式,在多门限协作检测过程中设定多个能量区域及对应不同的权系数,增加传输和融合的信息量。仿真结果证明,在相同条件下多门限的协作检测方式能明显地提高系统检测的准确性。

Considering the problems such as shadow fading and hidden terminal in single user detection in cognitive radio spectrum sensing,the paper introduces the structure of cooperate detection, and analyes the energy detection and information fusing of single user. It proposes a multi-threshold and multi-user cooperative detection method, which sets multiple energy areas corresponding to different weight coefficient, and increases the information content of transmition and fusing. The simulation results shows that multi-user cooperative detection can greatly improve the accuracy of system detection under the same conditions.