直接序列扩频系统抗干扰能力研究  

Research on Anti-interference Ability of Direct Sequence Spread Spectrum System

作　　者：李振东 谭维凤 康成斌[1] 程竟爽 LI Zhendong;TAN Weifeng;KANG Chengbin;CHENG Jingshuang(Institute of Telecommunication and Navigation Satellite,CAST,Beijing 100094,China;DFH Satellite Co.,Ltd.,Beijing 100094,China;Beijing Institute of Spacecraft System Engineering,Beijing 100094,China)

机构地区：[1]中国空间技术研究院通信与导航卫星总体部,北京100094 [2]航天东方红卫星有限公司,北京100094 [3]北京空间飞行器总体设计部,北京100094

出　　处：《电子与信息学报》2021年第1期116-123,共8页Journal of Electronics & Information Technology

摘　　要：在进行扩频系统设计时,有时需要分析系统的抗干扰能力,但现有的文献中关于直接序列扩频系统的抗宽带干扰能力、抗部分频带干扰能力说法不一致,提供的误比特率(BER)公式也互相不一致。该文通过理论推导给出了直接序列扩频系统在宽带干扰、部分频带干扰下更具一般意义的误比特率公式,并通过计算机仿真验证了该公式的正确性。最后利用该文给出的公式对直扩系统的性能随干扰频点、干扰带宽的变化趋势做了分析。When designing a spread spectrum system,it is sometimes necessary to analyze the anti-interference ability of the system.However,the existing literature on the anti-wideband interference capability and the ability to resist partial frequency band interference of the Direct Sequence Spread Spectrum(DSSS)system are different,and the Bit Error Rate(BER)formulas provided are different,the general BER formula of direct sequence spread spectrum system under wideband interference and partial frequency band interference is given by theoretical derivation.The correctness of the formula is verified by computer simulation.Finally,the performance of the DSSS system with the interference frequency and the interference bandwidth is analyzed using the formula given in this paper.

关 键 词：直接序列扩频 抗干扰 误比特率 误码率 

分 类 号：TN911.4[电子电信—通信与信息系统]