In this paper, the implementation of DFH system receiver is target.
本文以差分跳频通信系统的实现为目的。
Differential frequency hopping (DFH) is a kind of new frequency hopping (FH) technique.
差分跳频是一种新型的跳频通信技术。
By now, the working hours of DFH - 3 serial satellites had totalled up to nearly 30 years.
迄今为止，东方红三号系列卫星累计运行时间已近30年，积累了相当可观的故障数据。
But still DFH systems are facing the challenge of greater needs for stability and robustness.
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。
Based on the encryption principle of affine cipher, a frequency transition function of DFH is designed.
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。
According to the report, the first stage is a moon orbiting mission by 2007, using the DFH-3 satellite platform.
依照报告，第一个阶段是2007年之前一个环月球轨道运行任务，使用DFH - 3卫星平台。
This paper introduces the basic configuration and characteristics of the subsystem and its components for DFH-2A primary electrical power subsystem.
本文介绍DF H - 2a卫星一次电源分系统的基本配置、该分系统及其部件的基本性能。
This paper gives a brief description of the DFH-2A communication satellites which are the second generation of Chinese domestic communication satellites.
本文介绍中国第二代国内通信卫星——东方红二号甲（DFH-2A）的总体及分系统概貌。
Microwave plasma thruster (MPT) was applied to the sub system of DFH 3 satellite to complete its orbit transfer (OT) and north south station keeping (NSSK).
将微波等离子推力器(MPT)应用于“东方红三号”(DFH3)卫星的推进子系统，完成其轨道转移和南北位置保持任务。
In this paper, the characteristics of the DFH technologies are described, and the frequency transition function based on the recursive shift register is proposed.
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。
The frequency transition function in DFH system is one of the key technologies and will influences the performance of the corresponding communication system considerably.
频率转移函数是相关跳频的关键技术之一，将直接影响相关跳频通信系统的性能。
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.
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 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.
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。
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