差分跳频通信系统抗多音干扰的性能分析

Performance of Differential Frequency Hopping System in Multitone Jamming

本文介绍了一种新型的短波跳频通信技术——差分跳频,频率转移函数设计和信号的检测方法是差分跳频中的关键技术。在加性高斯白噪声和多音干扰共存的环境下,针对逐符号检测和按序列检测两种信号检测方法,分别就差分跳频通信系统的误符号性能进行了理论分析,同时做出相应的计算机仿真。结果证实了,差分跳频通信技术和按序列检测方法的结合,使通信系统的抗多音干扰的性能得到了比较显著的提升。

This paper present a new HF hopping system, which is called Differential Frequency Hopping （DFH） system. The frequency transition function and the method of signal detection are the key technologies in this system. Detection symbol by symbol and detection by sequence are two kinds of methods of signal detection. The performance of DFH in muhitone jamming （MTJ） and AWGN by using the two methods is analyzed respectively in theory, and the corresponding simulation result is given, all these prove that the performance of DFH system with signal detection by sequence is much better than ordinary frequency hopping system under MTJ.