刘玉琪,
程丰,
易建新
武汉大学电子信息学院 武汉 430072
基金项目:国家自然科学基金(61931015, 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)
详细信息
作者简介:万显荣：男，1975年生，教授，博士生导师，研究方向为新体制雷达设计，如外辐射源雷达，高频雷达系统及信号处理
刘玉琪：男，1990年生，博士生，研究方向为雷达信号处理、实时信号处理
程丰：男，1975年生，副教授，硕士生导师，研究方向为阵列信号处理、雷达信号处理
易建新：男，1989年生，博士，研究方向为雷达信号处理、目标跟踪和信息融合
通讯作者:万显荣 xrwan@whu.edu.cn
中图分类号:TN958.97计量
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被引次数:0
出版历程
收稿日期:2019-09-29
修回日期:2019-11-12
网络出版日期:2019-11-30
刊出日期:2020-01-21
Nonstationary Clutter Suppression Method for Passive Radar Based on Channel Segmentation and Smoothing
Xianrong WAN,,Yuqi LIU,
Feng CHENG,
Jianxin YI
School of Electronic Information, Wuhan University, Wuhan 430072, China
Funds:The National Natural Science Foundation of China (61931015, 61701350), The National Key Research and Development Program (2016YFB0502403), The Postdoctoral Innovation Talent Support Program (BX201600117), The Natural Science Foundation of Hubei Province (2016CFA061), The Major Technical Innovation Projects of Hubei Province (2019AAA061)
摘要
摘要:复杂电磁环境下，外辐射源雷达中多径杂波可能具备非平稳的跳变特性。该文针对这种跳变型非平稳杂波，结合辐射源信号的正交频分复用(OFDM)调制特性，提出一种基于信道分段平滑的杂波抑制方法。首先建立了跳变杂波的时域信号模型，然后结合OFDM信号结构将其变换到子载波域，接着在子载波域对各OFDM符号进行信道估计与分段平滑，最后利用该信道平滑值和对应段的参考信号抑制非平稳杂波。仿真和实测数据表明，该文方法能够有效抑制跳变型的非平稳杂波。
关键词:外辐射源雷达/
杂波抑制/
信道分段平滑/
非平稳杂波/
正交频分复用(OFDM)
Abstract:In the complex electromagnetic environment, multipath clutter in passive radar may be nonstationary and has jump characteristics. In order to suppress this kind of non-stationary clutter, a clutter suppression method is proposed based on channel segmentation and smoothing, which combines the Orthogonal Frequency Division Multiplexing (OFDM) modulation of the transmitting signal. First, the temporal domain signal model of the jumping clutter is established. Then it is transformed into subcarrier-domain by using the OFDM structure. After channel estimation of each OFDM symbol and smoothing the segmented channel estimation, the non-stationary clutter can be suppressed by the smoothed channel estimation and reference signal in each segment. Simulation and experiment data show that the proposed method can effectively suppress the non-stationary clutter with jumping characteristic.
Key words:Passive radar/
Clutter suppression/
Channel segmentation and smoothing/
Non-stationary clutter/
Orthogonal Frequency Division Multiplexing (OFDM)
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