DS/FH快跳频系统设计和窄带干扰抑制  

Design of DS/FH fast frequency hopping system and narrowband interference suppression

作　　者：杨学亮[1] 支琤[1] 林成浴[2] 

机构地区：[1]上海交通大学上海市数字媒体处理与传输重点实验室,上海200240 [2]海军航空工程学院青岛分院,青岛266041

出　　处：《信息技术》2012年第6期71-74,78,共5页Information Technology

摘　　要：跳频通信具有一定的抗窄带干扰的能力,跳速越高抗窄带干扰的能力越强。在DS/FH跳频系统中,解跳之后干扰信号存在于部分的扩频信号,相当于扩频信号内存在时变的干扰信号。文中将Turbo纠错码和分集合并技术联合应用于DS/FH快跳频系统中,利用信号的分集特性,采用奇异值分解的算法检测受干扰的跳频信号,将未受干扰的跳频信号合并,结果表明采用Turbo码的快速跳频方式时可以实现窄带干扰抑制。Frequency hopping communication has good ability of suppressing the narrowband interference, and this ability is enhancing as the jumping speed becomes high. In the DS/FH system, interference exists part of DS signal after dehoping, as the condition that the interference is time-variant. In this paper, the combination of turbo code and diversity combining techniques is utilized in DS/FH system. The algorithm uses the diversity feature of fast FH, and the singular value decomposition technique to detect the hopping signal jammed by interference. After the detection, it combines the hopping signals that are not jammed by interference to despread. The simulation results show that this algorithm can suppress the narrowband interference.

关 键 词：DS/FH扩频 抗窄带干扰 奇异值分解 TURBO 

分 类 号：TN914.42[电子电信—通信与信息系统]