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基于信道分段平滑的外輻射源雷達(dá)非平穩(wěn)雜波抑制方法

萬(wàn)顯榮,  劉玉琪,  程豐,  易建新

萬(wàn)顯榮, 劉玉琪, 程豐, 易建新. 基于信道分段平滑的外輻射源雷達(dá)非平穩(wěn)雜波抑制方法[J]. 電子與信息學(xué)報(bào), 2020, 42(1): 132-139. doi: 10.11999/JEIT190754
引用本文: 萬(wàn)顯榮, 劉玉琪, 程豐, 易建新. 基于信道分段平滑的外輻射源雷達(dá)非平穩(wěn)雜波抑制方法[J]. 電子與信息學(xué)報(bào), 2020, 42(1): 132-139. doi: 10.11999/JEIT190754
Xianrong WAN, Yuqi LIU, Feng CHENG, Jianxin YI. Nonstationary Clutter Suppression Method for Passive Radar Based on Channel Segmentation and Smoothing[J]. Journal of Electronics & Information Technology, 2020, 42(1): 132-139. doi: 10.11999/JEIT190754
Citation: Xianrong WAN, Yuqi LIU, Feng CHENG, Jianxin YI. Nonstationary Clutter Suppression Method for Passive Radar Based on Channel Segmentation and Smoothing[J]. Journal of Electronics & Information Technology, 2020, 42(1): 132-139. doi: 10.11999/JEIT190754

基于信道分段平滑的外輻射源雷達(dá)非平穩(wěn)雜波抑制方法

doi: 10.11999/JEIT190754 cstr: 32379.14.JEIT190754

  • 武漢大學(xué)電子信息學(xué)院 武漢 430072

基金項(xiàng)目: 國(guó)家自然科學(xué)基金(61931015, 61701350)，國(guó)家重點(diǎn)研發(fā)計(jì)劃(2016YFB0502403)，博士后創(chuàng)新人才支持計(jì)劃(BX201600117)，湖北省自然科學(xué)基金(2016CFA061)，湖北省技術(shù)創(chuàng)新重大專(zhuān)項(xiàng)(2019AAA061)
詳細(xì)信息
    作者簡(jiǎn)介:

    萬(wàn)顯榮：男，1975年生，教授，博士生導(dǎo)師，研究方向?yàn)樾麦w制雷達(dá)設(shè)計(jì)，如外輻射源雷達(dá)，高頻雷達(dá)系統(tǒng)及信號(hào)處理

    劉玉琪：男，1990年生，博士生，研究方向?yàn)槔走_(dá)信號(hào)處理、實(shí)時(shí)信號(hào)處理

    程豐：男，1975年生，副教授，碩士生導(dǎo)師，研究方向?yàn)殛嚵行盘?hào)處理、雷達(dá)信號(hào)處理

    易建新：男，1989年生，博士，研究方向?yàn)槔走_(dá)信號(hào)處理、目標(biāo)跟蹤和信息融合

    通訊作者:

    萬(wàn)顯榮　xrwan@whu.edu.cn

  • 中圖分類(lèi)號(hào): TN958.97

Nonstationary Clutter Suppression Method for Passive Radar Based on Channel Segmentation and Smoothing

  • School of Electronic Information, Wuhan University, Wuhan 430072, China

Funds: The National Natural Science Foundation of China (61931015, 61701350), The National Key Research and Development Program (2016YFB0502403), The Postdoctoral Innovation Talent Support Program (BX201600117), The Natural Science Foundation of Hubei Province (2016CFA061), The Major Technical Innovation Projects of Hubei Province (2019AAA061)
  • 摘要:

    復(fù)雜電磁環(huán)境下，外輻射源雷達(dá)中多徑雜波可能具備非平穩(wěn)的跳變特性。該文針對(duì)這種跳變型非平穩(wěn)雜波，結(jié)合輻射源信號(hào)的正交頻分復(fù)用(OFDM)調(diào)制特性，提出一種基于信道分段平滑的雜波抑制方法。首先建立了跳變雜波的時(shí)域信號(hào)模型，然后結(jié)合OFDM信號(hào)結(jié)構(gòu)將其變換到子載波域，接著在子載波域?qū)Ω鱋FDM符號(hào)進(jìn)行信道估計(jì)與分段平滑，最后利用該信道平滑值和對(duì)應(yīng)段的參考信號(hào)抑制非平穩(wěn)雜波。仿真和實(shí)測(cè)數(shù)據(jù)表明，該文方法能夠有效抑制跳變型的非平穩(wěn)雜波。

    Abstract:

    In the complex electromagnetic environment, multipath clutter in passive radar may be nonstationary and has jump characteristics. In order to suppress this kind of non-stationary clutter, a clutter suppression method is proposed based on channel segmentation and smoothing, which combines the Orthogonal Frequency Division Multiplexing (OFDM) modulation of the transmitting signal. First, the temporal domain signal model of the jumping clutter is established. Then it is transformed into subcarrier-domain by using the OFDM structure. After channel estimation of each OFDM symbol and smoothing the segmented channel estimation, the non-stationary clutter can be suppressed by the smoothed channel estimation and reference signal in each segment. Simulation and experiment data show that the proposed method can effectively suppress the non-stationary clutter with jumping characteristic.

    • HTML全文

  • 圖  1  所提方法的雜波抑制流程

    圖  2  雜波抑制前RD譜

    圖  3  ECA-C算法雜波抑制后的RD譜

    圖  4  信道響應(yīng)幅值之和

    圖  5  信道響應(yīng)幅值之和的微分

    圖  6  本文算法雜波抑制后的RD譜

    圖  7  雜波抑制后的目標(biāo)距離維截面

    圖  8  算法雜波抑制性能對(duì)比

    圖  9  實(shí)測(cè)數(shù)據(jù)信道響應(yīng)幅值之和

    圖  10  實(shí)測(cè)數(shù)據(jù)雜波抑制前RD譜

    圖  11  ECA-C算法雜波抑制后的實(shí)測(cè)數(shù)據(jù)RD譜

    圖  12  實(shí)測(cè)數(shù)據(jù)信道響應(yīng)幅值之和的微分

    圖  13  本文算法雜波抑制后的實(shí)測(cè)數(shù)據(jù)RD譜

    圖  14  實(shí)測(cè)數(shù)據(jù)經(jīng)雜波抑制后的目標(biāo)距離維截面

    表  1  多徑雜波仿真參數(shù)

    時(shí)延(μs)雜噪比(dB)
    非跳變段跳變段
    A類(lèi)雜波0:0.5:737:–2:937:–2:9
    B類(lèi)雜波1.8:1:12.830:–2:8(30:–2:8)+0.2
    下載: 導(dǎo)出CSV
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  • 收稿日期:  2019-09-29
  • 修回日期:  2019-11-12
  • 網(wǎng)絡(luò)出版日期:  2019-11-30
  • 刊出日期:  2020-01-21

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