数字信道化接收机中相位编码信号的识别方法研究  

Research into Recognition Methods of Phase-coded Signal in Digital Channelized Receiver

作　　者：翟羽佳[1] 陈文静 李琳[1] ZHAI Yu-jia;CHEN Wen-jing;LI Lin(The 723 Institute of CSIC,Yangzhou 225101,China)

机构地区：[1]中国船舶重工集团公司第七二三研究所,江苏扬州225101

出　　处：《舰船电子对抗》2020年第2期50-55,64,共7页Shipboard Electronic Countermeasure

摘　　要：传统的雷达侦察接收机对相位编码信号的识别方法通常是建立在对高速采样信号进行分析的基础上。提出一种在数字信道化接收机的信道化处理模块之后对相位编码信号进行识别的方法,通过对各子信道的幅度值和相位差进行滑动中值滤波处理和互相关运算,可以用固定门限值检测出相位编码信号的相位跳变点,从而计算出码元时间并确定信号的编码类型。最后,通过计算机仿真验证了该识别方法的可行性。The recognition of phase-coded signal in traditional radar reconnaissance receiver is usually based on the analysis of high speed sampling signal.This paper presents a recognition method of phase-coded signal after channelization processing module in digital channelized receiver.By processing the amplitude and phase-difference of subchannels with sliding median filtering and cross-correlation operation,the phase hopping point of a phase-coded signal could be detected with a fixed threshold value,consequently the chip time can be calculated and the signal code pattern could be determined.Finally,the feasibility of this algorithm is demonstrated by computer simulation.

关 键 词：数字接收机 信道化 相位编码信号 中值滤波 时间复杂度 互相关 

分 类 号：TN957.51[电子电信—信号与信息处理]