一種捷變頻聯(lián)合Hough變換的抗密集假目標干擾算法

全英匯; 陳俠達; 阮鋒; 高霞; 李亞超; 邢孟道

doi:10.11999/JEIT190010

一種捷變頻聯(lián)合Hough變換的抗密集假目標干擾算法

doi: 10.11999/JEIT190010

1.
西安電子科技大學雷達信號處理國家重點實驗室西安 710071
2.
西安電子工程研究所西安 710100

基金項目: 國家自然科學基金(61303035, 61772397)，中央高?；究蒲袠I(yè)務(wù)費專項；西安電子科技大學研究生創(chuàng)新基金

詳細信息

作者簡介:
全英匯：男，1981年生，博士，教授，研究方向為雷達實時信號處理

陳俠達：男，1995年生，碩士生，研究方向為雷達信號處理

阮鋒：男，1980年生，碩士，研究方向為雷達信號處理

高霞：女，1996年生，碩士生，研究方向為雷達信號處理

李亞超：男，1981年生，博士，教授，研究方向為雷達成像和實時信號處理

邢孟道：男，1975年生，博士，教授，研究方向為SAR/ISAR成像、動目標檢測等

通訊作者:
全英匯　yhquan@mail.xidian.edu.cn

中圖分類號: TN957.52; TN974
計量
- 文章訪問數(shù): 3355
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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2019-01-07
- 修回日期: 2019-05-08
- 網(wǎng)絡(luò)出版日期: 2019-05-24
- 刊出日期: 2019-11-01

An Anti-Dense False Target Jamming Algorithm Based on Agile Frequency Joint Hough Transform

1.
National Key Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China
2.
Xi’an Electronic Engineering Research Institute, Xi’an 710100, China

Funds: The National Natural Science Foundation of China(61303035, 61772397), The Fundamental Research Funds for the Central University; The Innovation Fund of Xidian University

摘要

摘要: 轉(zhuǎn)發(fā)式密集假目標干擾通過在距離維上產(chǎn)生多個虛假目標，擾亂雷達對真實目標的檢測與識別。由于虛假回波信號與真實信號高度相關(guān)，雷達很難對其進行有效識別和抑制。而捷變頻雷達通過隨機改變發(fā)射相鄰脈沖的載頻，大大提高了雷達的低截獲和抗干擾能力。但是捷變頻雷達不能完全消除干擾，部分目標回波脈沖可能被干擾淹沒，無法很好地完成相參積累和目標檢測。針對上述問題，該文提出捷變頻聯(lián)合Hough變換的抗干擾方法，首先利用脈間頻率捷變技術(shù)規(guī)避大部分窄帶瞄準和欺騙式干擾；然后針對干擾信號時間上的不連續(xù)特性，通過Hough變換和峰值提取進行干擾識別與抑制；最終，針對捷變頻與傳統(tǒng)動目標檢測(MTD)不兼容問題，通過稀疏重構(gòu)完成目標的檢測。仿真與實際雷達和干擾機對抗實驗表明，該方法可以獲得良好的抗干擾性能和目標檢測性能。
- 電子反對抗 /
- 密集多假目標 /
- 頻率捷變 /
- Hough變換
Abstract: Forwarding dense false target jamming disturbs the detection and recognition of real targets by generating multiple false targets in the range dimension. Because the false echo signal is highly correlated with the real signal, it is difficult for radar to recognize and suppress it effectively. Frequency agile radar improves greatly the low interception and anti-jamming ability of radar by randomly changing the carrier frequency of transmitting adjacent pulses. However, agile radar can not completely eliminate the interference, some target echo pulses may be submerged by the interference, agile radar can not complete coherent accumulation and target detection well either. To solve the above problems, an anti-jamming method of frequency agility combined with Hough transform is proposed. Firstly, the inter-pulse frequency agility technology is used to avoid most narrowband aiming and deceptive jamming. Then, according to the time discontinuity of the jamming signal, Hough transform and peak extraction are used to identify and suppress the jamming. Frequency agility is incompatible with the traditional Moving Target Detection(MTD). Target detection is accomplished by sparse reconstruction. The simulation and actual radar and jammer countermeasure experiments show that the proposed method can achieve good anti-jamming performance and target detection performance.
- Electronic counter-countermeasure /
- Dense multi-false targets /
- Frequency agility /
- Hough transform

HTML全文

圖 1 基于Hough變換的抗干擾方法流程圖

下載: 全尺寸圖片幻燈片

圖 2 未受干擾與進行干擾抑制前后檢測概率隨信噪比變化的關(guān)系

下載: 全尺寸圖片幻燈片

圖 3 檢測概率隨干信比變化的關(guān)系

下載: 全尺寸圖片幻燈片

圖 4 PD雷達處理結(jié)果

下載: 全尺寸圖片幻燈片

圖 5 干擾抑制前后捷變頻處理結(jié)果對比圖

下載: 全尺寸圖片幻燈片

表 1 雷達工作及目標參數(shù)

指標參數(shù)	取值	指標參數(shù)	取值
脈沖寬度	4 μs	脈沖重復頻率	2.5 kHz
信號帶寬	24 MHz	采樣頻率	48 MHz
脈沖組個數(shù)	64 個	初始載頻	10 GHz
跳頻總數(shù)	100 個	步進帶寬	20 MHz
目標距離	4 km	目標速度	2 km/s

下載: 導出CSV

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