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本文研究了混沌直接扩频信号在多径Rayleigh衰落信道中传输时的抗多径干扰和多址干扰的特性。对于所给出的混沌扩频通信系统 ,当加入多径干扰和信道噪声时 ,给出了理论误码率与实际误码率的比较 ,数值结果表明在多径衰落信道中 ,混沌扩频通信系统抗多径干扰的性能很好 ;同时对混沌直接扩频信号的奇、偶互相关函数进行了计算 ,结果表明混沌扩频通信系统具有良好的抗多址干扰能力。
In this paper, we study the anti-multipath and multi-access interference characteristics of chaotic direct spread spectrum signals transmitted in multipath Rayleigh fading channels. For the given chaotic spread spectrum communication system, when the multipath interference and the channel noise are added, the comparison between the theoretical bit error rate and the actual bit error rate is given. The numerical results show that in the multipath fading channel, chaos spread spectrum communication The performance of the system against multipath interference is very good. Meanwhile, the odd and even cross correlation functions of the chaotic direct spread spectrum signal are calculated. The results show that the chaotic spread spectrum communication system has good anti-multiple access interference ability.