极化通道扩展和盲源分离联合抗移频干扰技术

李欣; 王春阳; 付孝龙; 原慧

doi:10.13700/j.bh.1001-5965.2016.0250

极化通道扩展和盲源分离联合抗移频干扰技术

doi: 10.13700/j.bh.1001-5965.2016.0250

空军工程大学防空反导学院, 西安 710051

基金项目:

国家自然科学基金 61501500

航空科学基金 20150196007

详细信息

作者简介:
李欣, 男, 博士研究生。主要研究方向:雷达抗干扰新技术

王春阳, 男, 博士, 教授, 博士生导师。主要研究方向:雷达电子对抗技术

付孝龙, 男, 博士研究生。主要研究方向:雷达抗干扰新技术

原慧, 女, 博士研究生。主要研究方向:盲信号处理

通讯作者:
王春阳, E-mail:Wcy_kgd_cn@163.com

中图分类号: TN974
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出版历程
- 收稿日期: 2016-03-30
- 录用日期: 2016-07-01
- 网络出版日期: 2017-04-20

Shift-frequency jamming suppression technique based on polarized channel expanding and blind source separation union

School of Air and Missile Defense, Air Force Engineering University, Xi'an 710051, China

Funds:

National Natural Science Foundation of China 61501500

Aeronautical Science Foundation of China 20150196007

More Information

Corresponding author: WANG Chunyang, E-mail:Wcy_kgd_cn@163.com

摘要

摘要:
多次移频干扰是一种有效的对抗线性调频（LFM）脉冲压缩雷达的相干干扰样式，应用于自卫式干扰时，能够形成多个超前和滞后分布的假目标。提出利用盲源分离（BSS）的方法来分离回波和干扰信号，并通过频率补偿实现对干扰的抑制。首先分析了利用正交极化辅助天线扩展接收通道的可行性，其次建立了通道扩展后的雷达接收信号模型，讨论了回波与干扰信号的可分离性，最后研究了基于最大信噪比盲源分离和频率补偿的干扰抑制方法，并讨论了干扰机附加噪声对抗干扰效果的影响。仿真结果表明本文提出的方法在干信比为20dB时，仍可以有效地从回波和干扰混叠信号中提取出目标回波信号，从而实现对主瓣移频干扰的对抗。
- 移频干扰 /
- 极化通道扩展 /
- 盲源分离 (BSS) /
- 频率补偿 /
- 脉冲压缩
Abstract:
Multiple shift-frequency jamming is an effective coherent jamming type to linear frequency modulation (LFM) pulse compression radar, which could produce multiple false targets before and after real target when it is applied in self-defense jamming. Considering the jamming suppression problem, a method based on blind source separation (BSS) to separate echo and jamming signals and frequency compensation to suppress jamming signal is proposed. First, the feasibility of cross polarized channel expanding was illustrated. Second, a radar-receiving-signal model was established after channel expanding. The separability of echo and jamming signal was discussed. Finally, the jamming suppression method based on the maximum signal-to-noise ratio blind source separation and frequency compensation was studied, and the influence of accessional noise from jammer was analyzed. Simulation results show that the proposed method could extract the target echo signal from the mixed signal effectively even when the jamming-to-signal ratio is 20 dB, which will suppress the main lobe shift-frequency jamming.
- shift-frequency jamming /
- polarized channel expanding /
- blind source separation (BSS) /
- frequency compensation /
- pulse compression

HTML全文

图 1 主通道接收回波和干扰信号波形

Figure 1. Waveform of echo and jamming signals in main channel

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图 2 主通道接收信号脉冲压缩输出

Figure 2. Pulse compression output of signals in main channel

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图 3 主通道和辅助通道的混叠信号

Figure 3. Mixed signals in main channel and auxiliary channel

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图 4 盲源分离方法的分离结果

Figure 4. Separation results of BSS method

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图 5 分离结果的脉冲压缩输出

Figure 5. Pulse compression output of separation results

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图 6 干扰机内噪声对盲源分离结果的影响

Figure 6. Effects of noise in jammer on BSS results

下载: 全尺寸图片幻灯片

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