APSK信号解调算法研究  

Research on Synchronization Algorithm of APSK Signal

作　　者：曹利建 周钦山 韩翔 CAO Lijian;ZHOU Qinshan;HAN Xiang(Ceyear Technologies Co.,Ltd.,Qingdao 266555,China)

机构地区：[1]中电科思仪科技股份有限公司,山东青岛266555

出　　处：《电声技术》2022年第5期116-121,共6页Audio Engineering

基　　金：青岛市高端研发机构项目“微弱突发宽带电磁信号微波光子快速探测技术”(No.21-7-3-9-jch)。

摘　　要：针对APSK数字调制信号的解调测试需求,设计适用于信号分析仪的APSK数字调制信号解调方法。本文采用前馈解调方案,首先经过载波粗同步去除较大载波频偏,其次通过定时同步恢复出符号周期的最佳采样时刻,最后经过载波细同步流程去除剩余频偏,完成信号解调。经过采集数据验证,证明了本文所提算法可实现APSK信号的大频偏、高精度解调,满足解调测试需求。According to the requirement of demodulation of APSK digital modulation signal, a demodulation method of APSK signal is designed for signal analyzer. In this paper, the feed-forward demodulation scheme is adopted. Firstly, the carrier coarse synchronization is carried out to remove most carrier frequency deviation, then the timing synchronization unit is used to recover the best sampling time of symbol period. Finally, it enters the carrier fine synchronization process to precisely remove the residual frequency deviation and complete the signal demodulation. It is proved that the proposed algorithm can achieve large frequency offset and high-precision demodulation of APSK signal.

关 键 词：解调 同步 信号分析仪 

分 类 号：TN911.6[电子电信—通信与信息系统]