差分跳频与常规跳频抗部分频带干扰的性能比较  

Performance comparison of differential frequency hopping and conventional frequency hopping against partial-band jamming

作　　者：朱毅超[1] 

机构地区：[1]中国舰船研究院,北京100192

出　　处：《舰船科学技术》2011年第6期61-65,共5页Ship Science and Technology

基　　金：国家自然科学基金资助项目(60832006)

摘　　要：在差分跳频抗部分频带干扰比特误码率(BER)的理论分析结果基础上,将差分跳频系统与常规快跳频系统抗部分频带干扰的BER联合—切尔诺夫界进行了比较。在差分跳频采用维特比译码,且两系统均采用加权能量度量,并具有相同频谱效率的情况下,比较结果表明:在加性白高斯噪声(AWGN)与瑞利信道下,差分跳频的抗部分频带干扰性能明显优于快跳频系统。在AWGN信道下,当差分跳频的每跳传输比特数与快跳频系统的每符号比特数均为1,且BER大于10-6时,差分跳频系统达到相同BER所需的信干比(SJR)较快跳频系统低6 dB。Based on the theoretical bit error rate（BER）results of differential frequency hopping（DFH）against partial-band jamming,this paper compares the union-chernoff BER bounds of DFH and conventional fast frequency hopping（FFH）against partial-band jamming.In comparison,Viterbi algorithm is used by DFH and weighted energy metric is used by both DFH and FFH.Furthermore,equal spectrum efficiency is assumed for both systems.Comparison results show that DFH has significantly better anti-jamming performance compared with FFH.If DFH transmits 1 bit per hop,FFH transmits 1 bit per symbol,and BER is larger than 10-6,DFH requires 6 dB less signal-to-jamming ratio（SJR）than FFH to achieve the same BER.

关 键 词：差分跳频 快跳频 部分频带干扰 切尔诺夫界 

分 类 号：TN914.41[电子电信—通信与信息系统]