自适应多普勒频移的二相码信号处理方法  

A Biphasic Coded Signal Processing Method with Adaptive Doppler Frequency Shift

作　　者：陈华[1] 李勇[1] 薛卫东[1] 杨宝平 赵勇 高艳辉 岳亮辉 CHEN Hua;LI Yong;XUE Weidong;YANG Baoping;ZHAO Yong;GAO Yanhui;YUE Lianghui(Shaanxi Changling Electronic Technology Co Ltd,Baoji 721006,China)

机构地区：[1]陕西长岭电子科技有限责任公司,陕西宝鸡721006

出　　处：《雷达科学与技术》2024年第3期349-354,共6页Radar Science and Technology

基　　金：陕西省重点研发计划项目(No.2023-YBGY-044)。

摘　　要：针对二相编码脉冲压缩雷达的信号处理、航天测控系统接收机的解扩需求,在高动态大偏差多普勒频移的场景下,对载波频率搜索捕获的处理方法复杂、计算量较大、实时性较差等问题,本文提出了一种自适应多普勒频移的二相码信号处理方法,在单脉冲的脉内实时提取多普勒频移同相信号及正交信号的波形,并且生成4个片段信号,根据各信号之间固定的时序关系,去除多普勒频移对基带信号的调制,恢复原始基带信号,进而实现脉冲压缩及接收机解扩。MATLAB仿真验证了有效性和可行性。该方法实现简捷、计算量小、实时性好、硬件资源少,对现有相关信号处理领域有一定的指导意义。Aiming at the signal processing requirements of biphasic coded pulse compression radar and the despread requirements of aerospace measurement and control system receiver,the processing method for carrier frequency search and capture in high dynamic and large deviation Doppler frequency shift scenarios is complex,computationally intensive,and has poor real-time performance.In this paper,an adaptive Doppler frequency shift method for biphase code signal processing is proposed.Firstly,the Doppler frequency shift in-phase signal and orthogonal signal waveforms within a signal pulse are extracted in real time,and four segmented signals are generated.Then,based on the fixed tem-poral relationship between each signal,the modulation of the baseband signal by Doppler frequency shift is removed,and the original baseband signal is recovered,thereby achieving pulse compression and receiver despreading.The MATLAB simulation verifies the effectiveness and feasibility.This method is simple to implement,low computational complexity,good real-time performance,and takes up fewer hardware resources,which has certain guiding significance for the existing related signal processing field.

关 键 词：多普勒频移 解扩 脉冲压缩 基带信号 二相码 

分 类 号：TN957[电子电信—信号与信息处理]