非合作无源探测中的参考信号提纯新方法

doi:10.7527/S1000-6893.2021.25025

电子电气工程与控制

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非合作无源探测中的参考信号提纯新方法

应涛¹, 王雪宝², 田威¹, 周成¹, 侯小阳¹

1. 海军工程大学电子工程学院, 武汉 430033;
2. 海军士官学校电子对抗雷达声纳系, 蚌埠 233012

收稿日期:2020-11-30 修回日期:2020-12-28 发布日期:2021-02-24
通讯作者: 王雪宝 E-mail:wangxuebao_china@163.com
基金资助:
国家自然科学基金（62073334，61803379）；中国博士后基金（2017M613370）

A novel algorithm for reference signal purification in non-cooperative passive detection

YING Tao¹, WANG Xuebao², TIAN Wei¹, ZHOU Cheng¹, HOU Xiaoyang¹

1. College of Electronic Engineering, Naval University of Engineering, Wuhan 430033, China;
2. Department of Electronic Countermeasures Radar and Sonar, Naval Petty Officer Academy, Bengbu 233012, China

Received:2020-11-30 Revised:2020-12-28 Published:2021-02-24
Supported by:
National Natural Science Foundation of China (62073334, 61803379), General Program Supporting Fund of China Postdoctoral Science Foundation (2017M613370)

摘要/Abstract

摘要： 非合作无源探测系统通过直达波提纯来获取参考信号，参考信号的纯净程度对系统探测性能具有重要影响。针对非合作无源探测中的参考信号提纯问题，提出了一种基于稀疏特性的参考信号提纯新方法。首先将参考通道接收的混合信号变换到对时延敏感的分数阶傅里叶变换域上，并对直达波信号和多径干扰信号在分数阶傅里叶变换域上的稀疏特性进行了分析；然后利用分数阶傅里叶变换域的尖峰推导出直达波信号的参数，恢复直达波信号，实现参考信号提纯。仿真结果表明了本文提出新方法的有效性，与时域自适应滤波方法相比，该方法提纯的参考信号失真更小。

关键词: 非合作无源探测, 参考信号, 稀疏特性, 分数阶傅里叶变换, 提纯

Abstract: The non-cooperative passive detection system obtains the reference signal by purifying the direct-path signal, and the purity of the reference signal will make a difference to the performance of target detection. A novel algorithm for reference signal purification is proposed based on sparse characteristics. First, the mixed signal received by the reference channel is transformed to the fractional Fourier domain. The sparse characteristics of direct-path signal and multipath signals are analyzed in the fractional Fourier domain. Then, the estimation of parameters from derivation of peaks in the fractional Fourier domain will be used to reconstruct the direct-path signal. Finally, simulation results demonstrate that the proposed algorithm is effective and outperforms the temporal adaptive filter as well as the purified reference signal is distortionless.

Key words: non-cooperative passive detection, reference signal, sparse characteristic, fractional Fourier transformation, purification

中图分类号:

应涛, 王雪宝, 田威, 周成, 侯小阳. 非合作无源探测中的参考信号提纯新方法[J]. 航空学报, 2022, 43(2): 325025-325025.

YING Tao, WANG Xuebao, TIAN Wei, ZHOU Cheng, HOU Xiaoyang. A novel algorithm for reference signal purification in non-cooperative passive detection[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(2): 325025-325025.

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E-mail：hkxb@buaa.edu.cn

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非合作无源探测中的参考信号提纯新方法

A novel algorithm for reference signal purification in non-cooperative passive detection

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