针对DS通信系统来说,分配带宽内DS扩频通信,就是将待传输的业务信息用伪随机码c(t)扩展到卫星转发器分配给舰载站的载波频带对应的载波速率上,然后经调制变频后送到无线信道中,在舰载站接收端通过DS解扩处理,将输入的宽带有用信号的频谱恢复为原信号带宽,而频带较宽的干扰信号频谱则被进一步扩展,通过DS解扩模块后的窄带滤波器可以将大部分干扰信号滤除,实现DSSS对干扰的抑制.但是对不同干扰样式的DSSS系统来说其干扰效果是不一样的,要根据具体的干扰信号的样式进行具体分析.主要分析针对压制性干扰:点频干扰、多频干扰、部分频带干扰、全频带干扰对DSSS技术的干扰效果进行分析.%For the DS communication system,DS spread spectrum communication within the allocated bandwidth means that the service information to be transmitted is extended to the carrier frequency corresponding to the carrier frequency band allo-cated by the satellite transponder to the shipborne station by the pseudo-random code, and then modulated and frequency-converted Sent to the wireless channel,the receiver at the carrier station by DS despreading processing,the input broadband useful signal spectrum is restored to the original signal bandwidth,while the wider band interference signal spectrum is fur-ther expanded,Narrowband filter after DS despreading module can filter most interference signals[1,2],so as to achieve the suppression of interference by DSSS. However, the interference effects of DSSS systems with different interference patterns are not the same,and the concrete analysis is performed according to the specific interference signal patterns.In this paper,the main analysis for the suppression of coercion:point frequency interference,multi-frequency interference,part of the band interference,full-band interference on the DSSS technology interference analysis.
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