一种基于协议的短波多音信号的解调方法  

A Demodulation Method of Short Wave Multi-tone Signal Based on Protocol

作　　者：焦玉龙[1] 陈丽[1] JIAO Yu-long;CHEN Li(The 54th Research Institute of CETC,Shijiazhuang 050081,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《舰船电子对抗》2022年第6期50-53,共4页Shipboard Electronic Countermeasure

基　　金：河北省自然科学基金项目,项目编号:206Z0701G。

摘　　要：多载波并行调制是短波通信中一种重要的信号波形。针对一种典型的多音并行传输系统,设计了协议信号特征的解调方法。首先对CLOVER-2000系统信号波形进行了分析,根据信号传输的方式和特点,设计了适合多音并行的多滤波器能量检测法,并根据持续时长判断该数据分属的模式及传输的类型;使用频域相位差分法对信号进行解调,并提取数据信息,用于对后续数据块的进一步解调处理。通过对实际信号的采集与处理,验证了解调算法的正确性。Multi-carrier parallel modulation is an important signal waveform in the short wave communication.This paper designs a demodulation method of protocol signal characteristics aiming at a typical multi-tone parallel transmission system.Firstly,the signal waveform of CLOVER-2000 system is analyzed.According to the signal transmission modes and characteristics,a multi-filter energy detection method suitable for multi-tone parallel is designed,and the mode and transmission type of the data are judged according to the duration.The frequency domain phase difference method is used to demodulate the signals,and data information is extracted for further demodulation processing of subsequent data blocks.The correctness of the demodulation algorithm is verified by the collecting and processing of the actual signal.

关 键 词：多载波并行信号 CLOVER-2000 帧检测 多音信号解调 

分 类 号：TN911[电子电信—通信与信息系统]