PCM/DPSK遥测信号数字化解调技术研究

Research on Digital Demodulation of PCM/DPSK Telemetry Signal

提出了一种新的PCM/DPSK遥测信号数字化解调方法。通过采用最小均方误差(LMS)自适应算法,跟踪信号的相位信息,获取PCM/DPSK信号相位突变点,根据DPSK调制原理,实现信号的解调。详细介绍了该解调方法的基本原理及实现过程,并分析了解调过程中多普勒频率对解调性能的影响。

This paper presents a new digital demodulation method for PCM/DPSK telemetry signal. The method tracks signal＇s phase information by LMS algorithm, and gets skip position of signal＇s phase, thus realizes the demodulation for PCM/DPSK signal according to the regulation of modulation of the signal. The paper discusses the basic theory and implementation of the method, and analyses the effects of Doppler frequency on the demodulation performance during the process of demodulation.