單通道合成孔徑雷達(dá)抗調(diào)頻斜率失配干擾新方法

孟智超; 盧景月; 張帥欽; 張磊; 王虹現(xiàn)

doi:10.11999/JEIT190687

單通道合成孔徑雷達(dá)抗調(diào)頻斜率失配干擾新方法

doi: 10.11999/JEIT190687

1.
西安電子科技大學(xué)雷達(dá)信號(hào)處理國(guó)家重點(diǎn)實(shí)驗(yàn)室西安 710071
2.
63610部隊(duì) 庫(kù)爾勒 841001
3.
中山大學(xué)電子與通信工程學(xué)院廣州 510275

基金項(xiàng)目: 國(guó)家自然科學(xué)基金(61771372, 61771367)

詳細(xì)信息

作者簡(jiǎn)介:
孟智超：男，1997年生，博士生，研究方向?yàn)楹铣煽讖嚼走_(dá)成像與抗干擾

盧景月：男，1994年生，博士生，研究方向?yàn)楹铣煽讖嚼走_(dá)成像

張帥欽：男，1983年生，高級(jí)工程師，研究方向?yàn)槔走_(dá)目標(biāo)特性與目標(biāo)識(shí)別

張磊：男，1984年生，副教授，研究方向?yàn)楹铣煽讖嚼走_(dá)成像，目標(biāo)識(shí)別

王虹現(xiàn)：男，1979年生，副教授，研究方向?yàn)槔走_(dá)信號(hào)處理

通訊作者:
張磊　zhanglei57@mail.sysu.edu.cn

中圖分類(lèi)號(hào): TN975
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- 文章訪問(wèn)數(shù): 2412
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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2019-09-05
- 修回日期: 2020-04-02
- 網(wǎng)絡(luò)出版日期: 2020-04-11
- 刊出日期: 2020-09-27

A New Method of Anti-FM Slope Mismatch Jamming for Single Channel Synthetic Aperture Radar

1.
National Key Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China
2.
No.66393 Unit, the PLA, Kuerle 841001, China
3.
School of Electronic and Communication Engineering, Sun Yat-sen University, Guangzhou 510275, China

Funds: The National Natural Science Foundation of China (61771372, 61771367)

摘要

摘要: 該文針對(duì)單通道合成孔徑雷達(dá)(SAR)無(wú)法有效抑制調(diào)頻斜率失配干擾的問(wèn)題進(jìn)行了深入的研究。根據(jù)干擾頻譜與真實(shí)回波頻譜的差異，該文提出了一種基于頻域匹配濾波處理的合成孔徑雷達(dá)調(diào)頻斜率失配干擾抑制方法。該方法在準(zhǔn)確測(cè)得干擾調(diào)頻斜率的基礎(chǔ)上，首先利用干擾信號(hào)的空間稀疏性以及低信干比(SIR)的特點(diǎn)，對(duì)干擾位置進(jìn)行稀疏超分辨估計(jì)以獲得較為精確的干擾時(shí)延相位。然后通過(guò)獲得的干擾調(diào)頻斜率和時(shí)延相位重建干擾信號(hào)頻譜，以此為基礎(chǔ)設(shè)計(jì)正交匹配濾波器在頻域?qū)嵤└蓴_信號(hào)的抑制，并重建無(wú)失真場(chǎng)景圖像。最后，計(jì)算機(jī)仿真實(shí)驗(yàn)驗(yàn)證了該文所提方法的有效性。
- 抗干擾 /
- 調(diào)頻斜率失配干擾 /
- 稀疏 /
- 正交匹配濾波
Abstract: The problem that single-channel Synthetic Aperture Radar (SAR) can not effectively suppress FM slope mismatch jamming is studied in this paper. According to the difference between the jamming spectrum and the real echo spectrum, a method for suppressing the mismatch jamming of SAR FM slope based on matched filtering in the frequency domain is proposed. Based on the accurate measurement of the slope of jamming FM, the sparse super-resolution estimation of the jamming position is carried out to obtain a more accurate phase of jamming delay by utilizing the sparsity of the jamming signal and the characteristics of low Signal-to-Interference Ratio (SIR). Then, the spectrum of the interference signal is reconstructed by the obtained slope of interference frequency modulation and phase delay. Based on this, the orthogonal matched filter is designed to suppress the interference signal in the frequency domain and reconstruct the undistorted scene image. Finally, computer simulation experiments verify the effectiveness of the proposed method.
- Anti-jamming /
- FM slope mismatch jamming /
- Sparse /
- Orthogonal matched filtering

HTML全文

圖 1 算法流程示意圖

下載: 全尺寸圖片幻燈片

圖 2 正交匹配濾波影響因子關(guān)系曲線

下載: 全尺寸圖片幻燈片

圖 3 SIR對(duì)頻域陷波法干擾抑制比的影響

下載: 全尺寸圖片幻燈片

圖 4 點(diǎn)目標(biāo)成像干擾抑制效果對(duì)比

下載: 全尺寸圖片幻燈片

圖 5 干擾抑制成像對(duì)比實(shí)驗(yàn)

下載: 全尺寸圖片幻燈片

表 1 實(shí)驗(yàn)參數(shù)

參數(shù)	數(shù)值	參數(shù)	數(shù)值
載頻	3 GHz	距離向采樣點(diǎn)	1024
信號(hào)帶寬	100 MHz	脈沖數(shù)	512
脈沖寬度	2 μs	脈沖重復(fù)頻率	3 kHz
采樣頻率	120 MHz	干擾點(diǎn)源數(shù)量	1
平臺(tái)速度	50 m/s	調(diào)頻斜率失配比	0.8

下載: 導(dǎo)出CSV

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