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基于方向圖和多普勒相關(guān)系數(shù)的天基陣列SAR通道相位誤差補(bǔ)償方法

潘潔,  王帥,  李道京,  盧曉春

潘潔, 王帥, 李道京, 盧曉春. 基于方向圖和多普勒相關(guān)系數(shù)的天基陣列SAR通道相位誤差補(bǔ)償方法[J]. 電子與信息學(xué)報(bào), 2019, 41(7): 1758-1765. doi: 10.11999/JEIT181061
引用本文: 潘潔, 王帥, 李道京, 盧曉春. 基于方向圖和多普勒相關(guān)系數(shù)的天基陣列SAR通道相位誤差補(bǔ)償方法[J]. 電子與信息學(xué)報(bào), 2019, 41(7): 1758-1765. doi: 10.11999/JEIT181061
Jie PAN, Shuai WANG, Daojing LI, Xiaochun LU. A Channel Phase Error Compensation Method for Space Borne Array SAR Based on Antenna Pattern and Doppler Correlation Coefficient[J]. Journal of Electronics & Information Technology, 2019, 41(7): 1758-1765. doi: 10.11999/JEIT181061
Citation: Jie PAN, Shuai WANG, Daojing LI, Xiaochun LU. A Channel Phase Error Compensation Method for Space Borne Array SAR Based on Antenna Pattern and Doppler Correlation Coefficient[J]. Journal of Electronics & Information Technology, 2019, 41(7): 1758-1765. doi: 10.11999/JEIT181061

基于方向圖和多普勒相關(guān)系數(shù)的天基陣列SAR通道相位誤差補(bǔ)償方法

doi: 10.11999/JEIT181061 cstr: 32379.14.JEIT181061
  • 1.

    中國科學(xué)院電子學(xué)研究所 北京 100190

  • 2.

    微波成像技術(shù)重點(diǎn)實(shí)驗(yàn)室 北京 ??100190

  • 3.

    中國科學(xué)院大學(xué) 北京?? 100049

  • 4.

    中國科學(xué)院國家授時(shí)中心 西安?? 710600

詳細(xì)信息
    作者簡介:

    潘潔：女，1977年生，高級工程師，博士生，研究方向?yàn)橄∈桕嚵欣走_(dá)系統(tǒng)

    王帥：男，1992年生，博士生，研究方向?yàn)楹铣煽讖嚼走_(dá)成像技術(shù)

    李道京：男，1964年生，研究員，博士生導(dǎo)師，研究方向?yàn)槔走_(dá)系統(tǒng)和雷達(dá)信號處理

    盧曉春：女，1970年生，研究員，博士生導(dǎo)師，研究方向?yàn)榫軙r(shí)間信息傳輸與信息處理

    通訊作者:

    潘潔　panj@mail.ie.ac.cn

  • 中圖分類號: TN958

A Channel Phase Error Compensation Method for Space Borne Array SAR Based on Antenna Pattern and Doppler Correlation Coefficient

  • 1.

    Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China

  • 2.

    National Key Laboratory of Microwave Imaging Technology, Beijing 100190, China

  • 3.

    University of Chinese Academy of Sciences, Beijing 100049, China

  • 4.

    National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China

  • 摘要: 隨著對地觀測技術(shù)的發(fā)展，要求SAR系統(tǒng)能夠同時(shí)實(shí)現(xiàn)高分辨率和寬測繪帶，天基陣列多通道SAR結(jié)合數(shù)字波束形成(DBF)技術(shù)為解決該問題提供了很好的思路，但各個(gè)通道之間相位誤差會(huì)很大程度上降低DBF的性能，常規(guī)通道誤差補(bǔ)償方法估計(jì)精度不足，應(yīng)用場景受限。針對上述問題，該文提出一種基于方向圖和多普勒相關(guān)系數(shù)的天基陣列SAR通道相位誤差補(bǔ)償方法，不僅利用天線方向圖先驗(yàn)信息，還充分利用場景不同多普勒相關(guān)性信息，通過最小化天線方向圖和多普勒的組合差異，實(shí)現(xiàn)對通道之間相位誤差的估計(jì)。結(jié)合RADAR-SAT數(shù)據(jù)的仿真試驗(yàn)結(jié)果驗(yàn)證了該算法的有效性。
    Abstract: With the development of earth remote sensing technology, SAR system is required to obtain high resolution and wide swath simultaneously, the space borne array SAR combined with Digital Beam Forming (DBF) technology provides a good solution to solve the problem. However, the phase error between channels will degrade the quality of DBF, and the traditional compensation methods suffer from large error or limite application. In this paper, a compensation method based on antenna pattern and Doppler correlation coefficient is proposed, using the antenna pattern and meanwhile utilizing the Doppler correlation coefficient. By minimizing the combined cost function, the phase error between channels are estimated. Simulation results using RADAR-SAT data validate the effectiveness of the proposed method.
    • HTML全文

  • 圖  1  SAR系統(tǒng)坐標(biāo)系

    圖  2  算法流程圖

    圖  3  通道融合之后的點(diǎn)目標(biāo)

    圖  4  通道融合之后的方位向切片

    圖  5  補(bǔ)償相位誤差之后的點(diǎn)目標(biāo)

    圖  6  補(bǔ)償之后方位向切片

    圖  7  通道融合之后分布式目標(biāo)

    圖  8  通道融合之后方位向切片

    圖  9  本文方法補(bǔ)償相位之后

    圖  10  本文方法補(bǔ)償相位之后方位向切片

    圖  11  方向圖方法補(bǔ)償之后

    圖  12  文獻(xiàn)[10,11]方向圖方法方位向切片

    圖  13  通道相位誤差估計(jì)精度隨SNR變化

    圖  14  存在通道誤差的成像結(jié)果

    圖  15  通道誤差補(bǔ)償之后的結(jié)果

    表  1  雷達(dá)系統(tǒng)參數(shù)

    參數(shù)數(shù)值
    雷達(dá)工作頻率(GHz)5.3
    雷達(dá)有效速度(m/s)150
    中心斜距(km)20
    PRF(Hz)40
    帶寬(MHz)50
    信噪比(dB)20
    方位向通道數(shù)3
    下載: 導(dǎo)出CSV

    表  2  實(shí)際系統(tǒng)的主要參數(shù)

    參數(shù)數(shù)值
    工作頻率(GHz)5.3
    帶寬(MHz)30
    采樣率(MHz)32.3
    PRF(Hz)1256.98
    速度(m/s)7062
    通道數(shù)3
    相鄰?fù)ǖ篱g的距離(m)1.9
    下載: 導(dǎo)出CSV
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  • 收稿日期:  2018-11-20
  • 修回日期:  2019-04-20
  • 網(wǎng)絡(luò)出版日期:  2019-05-20
  • 刊出日期:  2019-07-01

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