直扩通信系统中DQPSK解调算法的改进研究

文章在阐述DQPSK调制算法原理和实现方法的基础上,在解调器采用旋转法解差分编码,并通过鉴相器,产生控制载波捕获与跟踪用的信号,克服了载波相位模糊度问题、数字信号可能极性倒置等问题。基于DQPSK调制改进算法的分析,利用Matlab对该算法进行仿真,结果表明,所述改进算法基本满足通信要求。

Study on DQPSK Demodulator Algorithm in Direct Sequence Spread Spectrum Communication System

This paper is on the foundation of elaborating DQPSK modulation algorithm principle and realization method,demodulator used in the solution of differential rotation law codes,and through phase detector,resulting in capture and tracking control of carrier signal used to overcome the problem of carrier phase ambiguity,digital signal may be inverted polarity and so on.DQPSK modulation to improve the algorithm based on analysis of the algorithm using Matlab simulation,results show that the improved algorithm de...