Cooperative Spectrum Sensing Algorithm based on Dempster-Shafer Theory
Abstract—In cognitive radio systems, unlicensed users can use the frequency bands when the licensed users are not present. Hence reliable detection of available spectrum is the foundation of cognitive radio technology. In order to efficiently detect the licensed users under prior knowledge constrain s in the fusion center, a novel cooperative spectrum sensing algorithm based on Dempster-Shafer theory s proposed. In this novel algorithm, the credibility and uncertainty are calculated based on the local sensing result of cognitive radios, then fused at the fusion center using Dempster-Shafer theory. The simulation results show that the performance of the novel algorithm is better than energy fusion method. If unlicensed users know more prior knowledge, the performance of the novel algorithm is the same as the optimal linear cooperative spectrum sensing algorithm.
cognitive radio spectrum sensing cooperation Dempster-Shafer theory
Xueqiang Zheng Jinlong Wang Qihui Wu Juan Chen
Institute of Communications Engineering,PLA University of Science and Technology Nanjing,China
国际会议
广州
英文
2008-11-19（万方平台首次上网日期，不代表论文的发表时间）