短波多音信号并行干扰消除解调算法  

Parallel Interference Cancellation Demodulation Algorithm for SW Multi-tone Signal

作　　者：李星 张利强 盛兴 张广军 LI Xing;ZHANG Liqiang;SHENG Xing;ZHANG Guangjun(Unit 63891 of PLA,Luoyang 410073,China)

机构地区：[1]解放军63891部队,河南洛阳410073

出　　处：《舰船电子对抗》2024年第1期64-67,94,共5页Shipboard Electronic Countermeasure

摘　　要：为了对抗严重的多径效应,短波通信系统经常采用多音并行方式进行信息传输,结合快速傅里叶(FFT)算法对信号进行调制和解调。部分通信系统的帧周期不满足载波间正交的条件,传统算法采用截断每帧信号的方式恢复载波正交条件后使用FFT算法进行解调,削弱了信号的空间分集增益。针对以上问题提出一种基于并行干扰消除策略的多音信号并行解调算法,通过构建干扰消除矩阵,在不牺牲信号帧长度的前提下实现解调,仿真实验证明了所提算法的有效性。In order to counter serious multi-path effects,short wave communication systems often use multi-tone parallel mode to transmit information,and combined with fast fourier transform(FFT)algorithm,signal modulation and demodulation are performed.The frame period of some communication systems does not meet the orthogonal conditions between carriers.Traditional algorithms use truncation of each frame signal to restore the orthogonal conditions of the carriers and then use FFT algorithm for demodulation,which reduces the spatial diversity gain of signals.A parallel demodulation algorithm for multi-tone signals based on parallel interference cancellation strategy is proposed to address the above issues.By constructing an interference cancellation matrix,demodulation is achieved without the truncation of signal frame length.Simulation experiments have demonstrated the effectiveness of the proposed algorithm.

关 键 词：短波通信 多音信号 干扰消除 信号处理 

分 类 号：TN911.7[电子电信—通信与信息系统]