PCM/FM遥测序列软解调研究  

Research on soft demodulation of PCM/FM telemetry sequence

作　　者：李仁龙[1] 付刚[1] 吴广志[1] 王丽萍[2] 

机构地区：[1]中国卫星海上测控部,江苏江阴214431 [2]上海建桥学院,上海201319

出　　处：《电子设计工程》2014年第17期175-178,共4页Electronic Design Engineering

基　　金：上海市教委创新项目资助(AASH1202)

摘　　要：为了提高PCM/FM信号解调系统的性能,本文研究一种多符号检测(Multi-Symbol Detection,MSD)技术。首先针对PCM/FM在硬件解调中存在的一系列问题,引入MSD软件解调方法;随后研究MSD在低信噪比下解调同步的实现;最后进行算法仿真,结果表明,在误码率10-4处时,检测性能比传统非相干鉴频算法可提高近3 dB,性能十分理想。In order to improve the performance of PCM/FM signal demodulation system, this paper studies a kind of Symbol Detection more （Multi - Symbol Detection, MSD） technology. MSD software demodulation method is introduced for a series of problems of PCM/FM signal in hardware demodulation. Then the implementation of MSD demodulation synchronization under low SNR is studied. Finally, the algorithm simulation is studied. The results show that detection performance than traditional non-coherent frequency discrimination algorithm can improve the nearly 3 dB at the bit error rate of 10-4, the performance is very ideal.

关 键 词：PCM FM MSD 同步 解调 

分 类 号：TN911[电子电信—通信与信息系统]