跳频通信系统抗干扰性能仿真与分析

Abstract

跳频通信是军事通信的主要手段之一，因此在复杂的通信环境下保证跳频通信系统的正常工作就变得十分重要。文章首先介绍了跳频系统，并给出了跳频系统整体仿真图。其次分析了跳频系统中常见的几种干扰，主要包括：宽带噪声干扰、部分频带噪声干扰及跟踪式干扰。根据各个干扰的干扰机制及特点，利用Simulink软件对各种干扰类型进行仿真建模。最后通过将各干扰信号加入已搭建好的跳频通信系统模型中得到不同类型干扰下系统的误码率曲线。通过仿真得到的数据与误码率曲线图，分析跳频通信系统对抗各干扰的能力，总结并提出了相应的改进措施。 Frequency-hopping communication is a main means of military communication, so it is very important to guarantee the normal work of this system in the complex communication environment. First, this paper introduces the theory of Frequency-hopping communication and the simulation of this system. Then, it analyses several common types of jamming in frequency-hopping communication, including broadband noise jamming, partial band noise jamming and tracking jamming. According to the pattern and feature of different jamming, it simulates different types of jamming by using Simulink software. At last, it gets the Bit Error Rate (BER) carves of system in different types of jamming by adding interference noises into the frequency-hopping communication system which has been set up. With the getting data and the BER carves, it analyses the anti-jamming ability of frequency hopping communication system under different types of jamming, summarizes and proposes some improved methods.