差分跳频是一种新型的跳频通信技术。
Differential frequency hopping (DFH) is a kind of new frequency hopping (FH) technique.
本文以差分跳频通信系统的实现为目的。
In this paper, the implementation of DFH system receiver is target.
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。
The frequencies transition function and the method of signal detection are the key technologies in this system.
基于仿射密码的加密原理，构造了一种差分跳频的频转移函数。
Based on the encryption principle of affine cipher, a frequency transition function of DFH is designed.
然而现有短波差分跳频通信系统仍面临稳定度和健壮度的挑战。
But still DFH systems are facing the challenge of greater needs for stability and robustness.
介绍了差分跳频技术的特点，构造了一类基于回归移位寄存器的频率转移函数。
In this paper, the characteristics of the DFH technologies are described, and the frequency transition function based on the recursive shift register is proposed.
同时从理论上对其参数的选择进行了分析，证明了采用该算法的差分跳频系统能够均匀使用每个频点。
The methods of the parameter selection for the G function were given in theory, and the quality of the uniformity usage of the frequency points in the DFH system range was analyzed.
结果证实了，差分跳频通信技术和按序列检测方法的结合，使通信系统在瑞利衰落信道条件下的性能得到了比较显著的提升。
The simulation results presented prove that the performance of DFH system with signal detecting by sequence is much better than the conventional frequency hopped systems over Rayleigh fading channels.
结果证实了，差分跳频通信技术和按序列检测方法的结合，使通信系统在瑞利衰落信道条件下的性能得到了比较显著的提升。
The simulation results presented prove that the performance of DFH system with signal detecting by sequence is much better than the conventional frequency hopped systems over Rayleigh fading channels.
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