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一種超寬帶10 GHz微波光子雷達(dá)包絡(luò)與相位聯(lián)合運(yùn)動(dòng)誤差估計(jì)方法

陳瀟翔,  邢孟道,  孫光才,  景國彬

陳瀟翔, 邢孟道, 孫光才, 景國彬. 一種超寬帶10 GHz微波光子雷達(dá)包絡(luò)與相位聯(lián)合運(yùn)動(dòng)誤差估計(jì)方法[J]. 電子與信息學(xué)報(bào), 2019, 41(5): 1069-1076. doi: 10.11999/JEIT180563
引用本文: 陳瀟翔, 邢孟道, 孫光才, 景國彬. 一種超寬帶10 GHz微波光子雷達(dá)包絡(luò)與相位聯(lián)合運(yùn)動(dòng)誤差估計(jì)方法[J]. 電子與信息學(xué)報(bào), 2019, 41(5): 1069-1076. doi: 10.11999/JEIT180563
Xiaoxiang CEHN, Mengdao XING, Guangcai SUN, Guobin JING. A Motion Error Estimation Method Joint Envelope and Phase for 10 GHz Ultra-wideband Microwave Photonic-based SAR Image[J]. Journal of Electronics & Information Technology, 2019, 41(5): 1069-1076. doi: 10.11999/JEIT180563
Citation: Xiaoxiang CEHN, Mengdao XING, Guangcai SUN, Guobin JING. A Motion Error Estimation Method Joint Envelope and Phase for 10 GHz Ultra-wideband Microwave Photonic-based SAR Image[J]. Journal of Electronics & Information Technology, 2019, 41(5): 1069-1076. doi: 10.11999/JEIT180563

一種超寬帶10 GHz微波光子雷達(dá)包絡(luò)與相位聯(lián)合運(yùn)動(dòng)誤差估計(jì)方法

doi: 10.11999/JEIT180563
  • 1.

    西安電子科技大學(xué)雷達(dá)信號(hào)處理國家重點(diǎn)實(shí)驗(yàn)室 ??西安 ??710071

  • 2.

    西安電子科技大學(xué)信息感知技術(shù)協(xié)同創(chuàng)新中心 ??西安 ??710071

基金項(xiàng)目: 國家重點(diǎn)研發(fā)計(jì)劃(2017YFC1405600)，國家自然科學(xué)基金創(chuàng)新群體基金(61621005)
詳細(xì)信息
    作者簡介:

    陳瀟翔：男，1994年生，博士，研究方向?yàn)闄C(jī)載高分辨SAR成像

    邢孟道：男，1975年生，教授，研究方向?yàn)镾AR/ISAR成像、動(dòng)目標(biāo)檢測

    孫光才：男，1984年生，副教授，研究方向?yàn)槎嗤ǖ啦ㄊ赶騍AR成像、SAR動(dòng)目標(biāo)成像等

    景國彬：男，1990年生，博士，研究方向?yàn)闄C(jī)載/星載高分辨SAR成像

    通訊作者:

    陳瀟翔　graceful1900@163.com

  • 中圖分類號(hào): TN958

A Motion Error Estimation Method Joint Envelope and Phase for 10 GHz Ultra-wideband Microwave Photonic-based SAR Image

  • 1.

    National Laboratory of Radar Signal Processing, XidianUniversity, Xi’an 710071, China

  • 2.

    CollaborativeInnovationCenter of Information Sensing and Understand, XidianUniversity, Xi’an 710071, China

Funds: The State Key Research Development Program (2017YFC1405600), The Foundation for Innovative Research Groups of the National Natural Science Foundation of China (61621005)
  • 摘要:

    由于運(yùn)動(dòng)誤差嚴(yán)重的2維空變性，對(duì)于10 GHz超寬帶微波光子SAR，傳統(tǒng)的直接從相位進(jìn)行運(yùn)動(dòng)誤差估計(jì)的方法估計(jì)精度不高。因此，該文提出一種包絡(luò)與相位聯(lián)合的超高分辨運(yùn)動(dòng)誤差估計(jì)方法，能夠在沒有慣導(dǎo)信息時(shí)實(shí)現(xiàn)運(yùn)動(dòng)誤差的精確估計(jì)。該方法首先在距離徙動(dòng)矯正(RCMC)之前，通過對(duì)包絡(luò)對(duì)齊算法(RAA)提取的包絡(luò)信息采用最小二乘算法(LSA)與梯度下降算法(GDA)獲得近似的3維運(yùn)動(dòng)誤差。接著，對(duì)粗補(bǔ)償與RCMC之后的數(shù)據(jù)，先消除方位相位空變，然后采用兩維空變的相位誤差估計(jì)方法獲得剩余運(yùn)動(dòng)誤差的精確估計(jì)。仿真和車載微波光子雷達(dá)實(shí)測數(shù)據(jù)驗(yàn)證了該方法的有效性。

    Abstract:

    Due to the 2-D vacancies with serious motion errors when processing 10 GHz ultra-wideband microwave photonic-based SAR, current motion error estimation methods directly estimating with phase error can not obtain correct estimation result in this paper. An ultra-high resolution SAR motion error estimation method jointing envelope and phase is proposed, which can realize accurate estimation of motion error without inertial information. Firstly, the approximate 3-D motion error is obtained by applying the Least Squares Algorithm (LSA) and the Gradient Descent Algorithm (GDA) to the envelope information extracted by the Range Alignment Algorithm (RAA) before Range Curve Migration Correction (RCMC). Then, phase-based motion error estimation is performed on the data after rough compensation and RCMC. After eliminating the azimuth variant phase error, the 2-D space-variant phase error estimation method is used to obtain accurate estimation of residual motion error. Processing of simulated data and real data acquired from vehicle-borne microwave photonic-based radar validates the effectiveness of the proposed method.

    • HTML全文

  • 圖  1  數(shù)據(jù)獲取模型

    圖  2  算法流程圖

    圖  4  本文所提方法關(guān)鍵步驟結(jié)果圖

    圖  3  仿真場景與添加的3維運(yùn)動(dòng)誤差

    圖  5  徙動(dòng)校正結(jié)果補(bǔ)償前后對(duì)比圖

    圖  6  子孔徑方位空變補(bǔ)償前后對(duì)比圖

    圖  7  誤差估計(jì)結(jié)果圖

    圖  8  徙動(dòng)校正結(jié)果對(duì)比圖

    圖  9  雷峰塔微波光子雷達(dá)成像結(jié)果對(duì)比圖

    表  1  雷達(dá)系統(tǒng)參數(shù)

    參數(shù) 值 參數(shù) 值
    中心頻率(GHz) 35 飛行速度(km/h) 10
    帶寬(GHz) 10 俯仰角(°) 13
    采用頻率(MHz) 500 距離分辨率(cm) 1.5
    脈沖重復(fù)頻率(Hz) 666 方位分辨率(cm) 2.5
    中心斜距(m) 150
    下載: 導(dǎo)出CSV
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    XU Gang, XING Mengdao, ZHANG Lei, et al. Robust autofocusing approach for highly squinted SAR imagery using the extended wavenumber algorithm[J]. IEEE Transactions on Geoscience and Remote Sensing, 2013, 51(10): 5031–5046. doi: 10.1109/tgrs.2013.2276112
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  • 文章訪問數(shù):  1893
  • HTML全文瀏覽量:  588
  • PDF下載量:  78
  • 被引次數(shù): 0
出版歷程
  • 收稿日期:  2018-06-08
  • 修回日期:  2018-12-20
  • 網(wǎng)絡(luò)出版日期:  2019-01-04
  • 刊出日期:  2019-05-01

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