基于最小误检概率的最优感知用户数目优化算法

Optimal Number of Secondary User Selection Algorithm Based on Minimizing the Error Detection Probability

频谱感知是认知无线电系统的关键技术之一,协作频谱感知能够提高频谱感知性能。首先定义了修正后的误检概率,然后以能量检测为基础,推导了在不同判决门限下为使误检概率达到最小的最优感知用户数目,并根据最优感知用户数目进行协作频谱感知。仿真结果表明,与传统的K秩准则相比,文章所提算法能够有效提高感知性能。

Spectrum sensing is one of the key technologies in cognitive radio, and cooperative spectrum sensing can improve the spectrum sensing performance. Firstly the paper defines a modified error detection probability, then it focuses on the optimal number of secondary user to minimize the error detection probability based on energy detection under different thresholds and performs cooperative spectrum sensing according to the optimal number of secondary user. Simulation results show that the proposed algorithm in the paper can greatly enhance the sensing performance compared to the traditional K/N rule.