基于信道多普勒特征的外辐射源雷达杂波抑制方法

doi:10.3969/j.issn.1001-506X.2021.01.08

系统工程与电子技术 ›› 2021, Vol. 43 ›› Issue (1): 55-61.doi: 10.3969/j.issn.1001-506X.2021.01.08

基于信道多普勒特征的外辐射源雷达杂波抑制方法

刘玉琪(), 万显荣(), 易建新(), 柯亨玉()

武汉大学电子信息学院, 湖北武汉 430072

收稿日期:2019-11-27 出版日期:2020-12-25 发布日期:2020-12-30
作者简介:刘玉琪(1990-),男,博士研究生,主要研究方向为雷达信号处理、实时信号并行处理。E-mail:yqlau@whu.edu.cn|万显荣(1975-),男,教授,博士研究生导师,博士,主要研究方法为新体制雷达设计,如外辐射源雷达、高频雷达系统及信号处理。E-mail:xrwan@whu.edu.cn|易建新(1989-),男,博士,主要研究方向为外辐射源雷达信号处理、目标跟踪和信息融合E-mail:jxyi@whu.edu.cn|柯亨玉(1957-),男,教授,博士研究生导师,博士,主要研究方向为电磁场理论、电波传播与天线理论。E-mail:hysp@whu.edu.cn
基金资助:
国家自然科学基金(61931015);国家自然科学基金(61701350);国家重点研发计划(2016YFB0502403);博士后创新人才支持计划(BX201600117);湖北省自然科学基金(2016CFA061);湖北省技术创新重大专项(2019AAA061)

Clutter suppression method for passive radar based on channel Doppler characteristic

Yuqi LIU(), Xianrong WAN(), Jianxin YI(), Hengyu KE()

School of Electronic Information, Wuhan University, Wuhan 430072, China

Received:2019-11-27 Online:2020-12-25 Published:2020-12-30

摘要/Abstract

摘要：

利用数字广播信号的正交频分复用(orthogonal frequency division multiplex, OFDM)调制特性,提出一种基于信道多普勒特征的外辐射源雷达杂波抑制方法。首先,在子载波域获取每个OFDM符号的频域信道响应值,然后将该信道响应值变换到时域,并在时域利用信道多普勒特征构造杂波子空间项,用于抑制零频和非零频杂波。所提方法杂波子空间构造与发射信号无关,可离线生成,简化了信号处理流程,降低了计算复杂度。仿真和实测数据均验证了所提方法的有效性。

关键词: 数字广播信号, 外辐射源雷达, 正交频分复用, 杂波抑制

Abstract:

A clutter suppression method of the passive radar based on channel Doppler characteristic is proposed utilizing the orthogonal frequency division multiplex (OFDM) modulation characteristic of the digital broadcasting signal. The proposed method first obtains the frequency domain channel response of each OFDM symbol in the subcarrier domain. Then the channel response is transformed into time domain. The clutter subspace term is constructed by the channel Doppler feature in the time domain, which is used to suppress the zero-frequency and non-zero-frequency clutter. The constructed clutter subspace in the proposed method is independent of the transmitted signal and can be generated offline, which simplifies the signal processing and reduces the computational complexity. The validity of the proposed method is verified by the simulation and measured data.

Key words: digital broadcasting signal, passive radar, orthogonal frequency division multiplex (OFDM), clutter suppression

中图分类号:

TN958.97

刘玉琪, 万显荣, 易建新, 柯亨玉. 基于信道多普勒特征的外辐射源雷达杂波抑制方法[J]. 系统工程与电子技术, 2021, 43(1): 55-61.

Yuqi LIU, Xianrong WAN, Jianxin YI, Hengyu KE. Clutter suppression method for passive radar based on channel Doppler characteristic[J]. Systems Engineering and Electronics, 2021, 43(1): 55-61.

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基于信道多普勒特征的外辐射源雷达杂波抑制方法

Clutter suppression method for passive radar based on channel Doppler characteristic

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