基于Matlab的混沌跳频通信系统的研究

The Chaotic Frequency Hopping Communication System Based on Matlab Simulation

基于传统伪随机码(PN码)的扩频系统因可用PN码组序列数目较少、序列复杂度低、保密性差等缺点,实用性受到限制。基于此以混沌为基础的扩频通信技术应运而生。混沌扩频通信系统的发展为扩频序列研究提供了新的思路,非周期的、初值敏感的、数目众多的混沌扩频序列成为了现代通信技术的一个研究热点。在给定仿真条件下,对该跳频通信系统在宽带噪声干扰工作机制下进行了仿真,得到了宽带噪声干扰下的误码率信噪比曲线。结果表明,混沌跳频通信系统的抗干扰能力在战术通信中有更高的可靠性。

The spread spectrum system based on the traditional pseudo random code( PN code) is limited because of its low sequence number,low complexity and poor security of PN code. Based on this,the spread of chaos-based communications technology comes into being. Chaotic spread spectrum communication system provides a new way of researching the development of spread spectrum sequence.Aperiodic,initial value sensitivity,numerous chaotic spread spectrum sequence has become a hot research topic of modern communication technology. At a given simulation conditions,the frequency hopping system in wideband noise interference mechanism simulation can obtain SNR BER curves in wideband noise interference. Results show that the anti-interference ability of the chaotic frequency hopping communication system has higher reliability in tactical communications.