多进制正交扩频系统的灵巧干扰  

Smart Jamming in N-ary Orthogonal Spread Spectrum Modulation System

作　　者：姚俊楠[1] 曹晶秋[1] 刘鑫[1] 

机构地区：[1]解放军理工大学通信工程学院,南京210007

出　　处：《电子对抗》2009年第3期1-5,共5页Electronic Warfare

摘　　要：短波第三代自动链路建立（3G-ALE）系统中的突发波形采用多进制正交扩频调制，所使用的扩频码为Walsh码。经扩频处理的信号频谱被展宽，但能量在频谱上的分布仍相对集中于部分特定的频点。系统通过对扩频信号叠加扰码的方法将信号能量分散在整个信号带宽内。针对3G-ALE系统的这一特点，提出了解扩相关器输出干扰分量最大化的干扰准则，设计了基于扰码同步的灵巧干扰信号。仿真结果表明，灵巧干扰扰相比有更为卓越的干扰性能。In the HF third generation automatic link establishment system, Walsh codes are used as orthogonal spread spectrum codes. Although the bandwidth of spread-spectrum signal is very large, the power of the signal is still concentrated in some certain frequency bands. In this condition, a criterion of smart jamming is proposed and a practical jamming signal which is based on random sym- bols spread-spectrum modulation is designed. The result of simulation shows that the smart jamming signal can achieve better performance than ordinary jamming signals.

关 键 词：正交扩频 3G-ALE 灵巧干扰 通信 

分 类 号：TN914.42[电子电信—通信与信息系统]