Abstract: In view of the present practical issues that channel noise seriously affected the communication quality of emergency communications, this paper studied the channel noise source and essential characteristics of emergency communication system and proposed a channel model of emergency communication, discussed the principles of interference noise suppression in chaotic spread-spectrum emergency communication system, designed a multi-user simulation model of chaotic spread spectrum emergency communications systems, and advanced its BER simulation and analysis in typical channel interference noise. Simulation results show that the chaotic spread spectrum communication system can effectively suppress strong noise interference and improve system BER performance in emergency communications significantly.

Key words: Emergency Communication, Chaotic Spread-Spectrum, System Design, Simulation Analysis

摘要： 针对应急通信中信道噪声干扰严重影响通信质量的实际问题，研究了应急通信系统信道噪声干扰的来源与本质特征，提出了应急通信信道模型；论述了混沌扩频应急通信系统干扰噪声抑制原理，设计了多用户混沌扩频应急通信系统仿真模型，并结合典型信道干扰噪声环境对其BER进行了仿真与分析。仿真实验结果表明，基于混沌扩频的应急通信系统能够有效抑制强噪声干扰，显著改善应急通信系统误码性能。

关键词: 应急通信, 混沌扩频, 系统设计, 仿真分析