数字通信信号侦察中基带成形脉冲波形估计及应用  

Baseband Shaping Pulse Waveform Estimation and Application in Digital Communication Signal Reconnaissance

作　　者：石荣 包金晨 刘畅 SHI Rong;BAO Jinchen;LIU Chang(Science and Technology on Electronic Information Control Laboratory,Chengdu 610036,China)

机构地区：[1]电子信息控制重点实验室,成都610036

出　　处：《电子信息对抗技术》2022年第1期41-46,共6页Electronic Information Warfare Technology

摘　　要：在对幅相正交调制的数字通信信号的侦察接收处理过程中,传统方法对目标信号的基带成形脉冲波形估计不够重视,造成后续非合作解调等性能难以进一步提升。针对上述问题,在对工程应用中最常见的矩形脉冲与平方根升余弦脉冲的信号模型与时频域特征简要概述之后,对基带成形脉冲的类型判断方法、以及平方根升余弦脉冲的滚降系数估计方法进行阐述,并结合不同的应用场合分析成形脉冲波形在幅相正交调制的数字通信信号的非合作解调与直接序列扩频通信信号的非合作解扩中所发挥的作用。从而为通信侦察处理流程的进一步完善与非合作侦察接收处理性能的提升提供理论与应用上的指导与参考。In traditional reconnaissance processing on the digital communication signal with amplitude phase quadrature modulation,the baseband shaping pulse waveform estimations of the target signal are not made the best,so it is difficult to further improve the non-cooperative demodulation performance.In order to solve this problem,firstly the signal models and time-frequency characteristics of the most common pulses in engineering applications,including a rectangular pulse and a square root raised cosine pulse,are briefly reviewed.Then,the type judgment method of baseband shaping pulse and the estimation method of roll-off coefficient for a square root raised cosine pulse are explained.Combined with different applications,the function of shaping pulse waveform is analyzed in non-cooperative demodulation on the digital communication signal and non-cooperative de-spreading on the direct sequence spread spectrum communication signal.Theoretical and practical guidance and reference are provided for further improvement of communication reconnaissance processing flow and non-cooperative receiving performance.

关 键 词：数字通信 基带成形脉冲 矩形脉冲 平方根升余弦脉冲 滚降系数 通信信号侦察 匹配滤波 非合作解调 

分 类 号：TN971.1[电子电信—信号与信息处理]