基于奇異譜分析的抗數(shù)字射頻存儲(chǔ)距離波門拖引干擾

盧云龍; 李明; 陳洪猛; 王澤玉; 左磊

doi:10.11999/JEIT150550

基于奇異譜分析的抗數(shù)字射頻存儲(chǔ)距離波門拖引干擾

doi: 10.11999/JEIT150550 cstr: 32379.14.JEIT150550

基金項(xiàng)目:

國家自然科學(xué)基金(61271297, 61272281, 61301284)，博士學(xué)科點(diǎn)科研專項(xiàng)基金(20110203110001)

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- 文章訪問數(shù): 1790
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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2015-05-11
- 修回日期: 2015-09-11
- 刊出日期: 2016-03-19

Countering DRFM Range Gate Pull-off Jamming Based on Singular Spectrum Analysis

Funds:

The National Natural Science Foundation of China (61271297, 61272281, 61301284), The Specialized Research Fund for the Doctoral Program of Higher Education (20110203110001)

摘要

摘要: 針對(duì)基于數(shù)字射頻存儲(chǔ)(DRFM)技術(shù)的轉(zhuǎn)發(fā)式欺騙干擾難以檢測(cè)和抑制問題，該文根據(jù)DRFM的延時(shí)量化會(huì)導(dǎo)致干擾信號(hào)產(chǎn)生細(xì)微的中心頻率頻移及諧波分量寄生的特性，提出一種基于奇異譜分析(SSA)的抗距離波門拖引干擾方法。該方法首先提取干擾信號(hào)諧波分量與目標(biāo)回波經(jīng)SSA分解后奇異值能量的分布差異特征，實(shí)現(xiàn)對(duì)有源欺騙干擾的檢測(cè)，然后依據(jù)干擾中心頻率頻移特性，通過劃分合適的奇異值子空間重構(gòu)目標(biāo)信號(hào)，實(shí)現(xiàn)對(duì)欺騙干擾的抑制。該方法不需要估計(jì)噪聲參數(shù)，在干擾檢測(cè)階段具有恒虛警特性。Monte Carlo仿真結(jié)果驗(yàn)證了該方法的有效性。
- 抗干擾 /
- 距離波門拖引干擾 /
- 奇異譜分析 /
- 延時(shí)量化
Abstract: Countering the active deception jamming which is repeated by a Digital Radio Frequency Memory (DRFM) has been a challenging problem. Utilizing the characteristics that the Range Gate Pull Off (RGPO) jamming has a slightly different center frequency from the input radar signal and evenly spaced harmonics, a novel anti-jamming approach is proposed based on Singular Spectrum Analysis (SSA). First, the singular values energy distribution diversity between jamming harmonics and target echo, which are pretreated through SSA decomposition, is extracted for jamming detection. Then according to the center frequency diversity, a suitable subspace of singular values is divided for recovering the target echo, which means the jamming is mitigated simultaneously. The proposed approach does not need to estimate noise parameter, and has the precious property of a Constant False-Alarm Rate (CFAR) in the jamming detection stage. The validity of the proposed method is evaluated using experimental data via Monte Carlo simulation.
- Anti-jamming /
- Range Gate Pull Off (RGPO) jamming /
- Singular Spectrum Analysis (SSA) /
- Time delay quantization

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