基于证据理论和信号特征的DTMB信号合作感知算法  

DTMB Signal Cooperative Sensing Algorithm Based on Dempster-shafer Theory and Signal Characteristics

作　　者：朱景晖[1] 李薰春[1] 杨明[1] 万戈[1] 

机构地区：[1]国家新闻出版广电总局广播科学研究院,北京100866

出　　处：《广播与电视技术》2015年第2期87-90,共4页Radio & TV Broadcast Engineering

摘　　要：本文以我国具有完整自主知识产权的DTMB标准为基础,研究了利用信号特征提取和证据理论的高效频谱感知算法。DTMB信号是统计平稳信号,各感知节点采用基于信号特征的检测算法,给出基于证据理论的合作频谱认知算法的证据提取,并将证据传送给控制中心,由控制中心利用加权D-S合成规则进行融合,给出授权节点信号是否存在的结论。仿真结果证明,该融合算法能够实现对DTMB信号的高效认知。Based on the Digital Television Terrestrial Multimedia Broadcasting（DTMB） system, the paper discusses a effective spectrum sensing algorithm with signal characteristics and dempster-shafer theory. DTMB＇s signal is a statistical stationary one, and the spectrum sensing algorithm of local nodes is based on signal characteristics. The credibility and uncertainty were calculated based on the local sensing result. With the dempster-shafer theory ,fusion account draws a conclusion which is whether the signal exists. The simulation results show that the performance of the algorithm is effective for DTMB systems.

关 键 词：信号特征 证据理论 

分 类 号：TN941.3[电子电信—信号与信息处理]