瑞利衰落信道下差分跳频通信系统的性能分析  

Performance analysis of differential frequency hopping system over Rayleigh fading channels

作　　者：陈智[1] 李少谦[1] 董彬虹[1] 

机构地区：[1]电子科技大学通信抗干扰技术国家级重点实验室,四川成都610054

出　　处：《电波科学学报》2007年第1期126-129,133,共5页Chinese Journal of Radio Science

基　　金：国防科技重点实验室基金项目(No.00JS04.3.1);国家自然科学基金重大项目;编号(60496313)

摘　　要：介绍了一种新型的短波跳频通信技术——差分跳频,频率转移函数设计和信号的检测方法是差分跳频中的关键技术。针对逐符号检测和按序列检测两种信号检测方法,分别就差分跳频通信系统在瑞利衰落信道条件下的性能进行了理论分析,同时做出相应的计算机仿真。结果证实了,差分跳频通信技术和按序列检测方法的结合,使通信系统在瑞利衰落信道条件下的性能得到了比较显著的提升。A new HF frequency hopped system called as differential frequency hopped （DFH） system is introduced in this paper. The frequencies transition function and the signal detection method are the key technologies in the system. For two kinds of signal detection method by symbol and by sequence, the detecting performances over Rayleigh fading channels are analyzed, respectively. The simulation results presented prove that the performance of DFH system with signal detecting by sequence is much better than the conventional frequency hopped systems over Rayleigh fading channels.

关 键 词：差分跳频 逐符号检测 按序列检测 瑞利衰落 

分 类 号：TN97[电子电信—信号与信息处理]