摘要
认知无线电的关键是快速且准确的频谱感知,协作频谱检测技术由于其良好的检测性能越来越受到人们的关注。由于无线通信信道中的多径衰落,阴影相关性制约着协作性能的提高,门限电平的选取也与协作用户的本地频谱检测结果有者密切关系。通过研究不同门限电平和阴影相关性对认知用户检测性能的影响,提出了一种多检测结果融合算法,仿真结果表明该方案具有良好的检测性能。
Fast and accurate spectrum sensation is the key for cognition radio.The cooperation spectrum sensing technology,owing to its good examination performance,receives more and more attention.Due to the multipath fading in wireless communication channel,the shadow relevance restricts the enhancement of cooperating performance,and the selection of threshold level is also closely related with the local spectrum sensing result of the cooperative users.This article discusses the influence of the different threshold and shadow relevance on cognitive user examination performance,proposes a fusion algorithm of multiple detection results,and the simulation results indicate that this scheme is of a good sensing performance.
出处
《通信技术》
2011年第5期40-41,79,共3页
Communications Technology
关键词
认知无线电
频谱检测
协作检测
cognitive radio
spectrum detection
cooperative detection
