一种双基地前视sar运动补偿方法

Bistatic forward-looking SAR (Synthetic Aperture Radar) motion compensation method

Abstract

本发明公开了一种双基地前视SAR运动补偿方法,采用方位-慢时间解耦合操作,将同一距离单元内的不同方位点目标进行分离处理,主要步骤包括:(1)空不变运动误差补偿;(2)距离向聚焦处理;(3)距离空变运动误差补偿;(4)方位空变运动误差补偿;(5)方位压缩;克服了传统合成孔径雷达运动补偿方法和现有双基地合成孔径雷达运动补偿方法难以校正运动误差的方位空变问题;本发明方法能够有效去除运动误差的方位空变,从而实现了双基地前视合成孔径雷达的精确补偿与聚焦。
The invention discloses a bistatic forward-looking SAR (Synthetic Aperture Radar) motion compensation method. Azimuth-slow time decoupling operation is adopted, and different azimuth point targets in the same distance unit are separated and processed. The method mainly comprises steps of: (1) space-invariant motion error compensation; (2) distance focus processing; (3) distance space-variant motion error compensation; (4) azimuth space-variant motion error compensation; and (5) azimuth compression. The problem that the traditional SAR motion compensation method and the existing bistatic SAR motion compensation method are hard to correct motion error azimuth space variance can be overcome. The motion error azimuth space variance can be effectively removed, and precise compensation and focusing of the bistatic forward-looking SAR can be realized.

Claims

Description

Topics

Download Full PDF Version (Non-Commercial Use)

Patent Citations (4)

    Publication numberPublication dateAssigneeTitle
    CN-101509976-AAugust 19, 2009北京理工大学Moving and state double-base synthetic aperture radar imaging method
    CN-103454635-ADecember 18, 2013西安电子科技大学Front squint SAR imaging method based on hypersonic aircraft at level flight section
    US-2009079621-A1March 26, 2009Bernhard Grafmueller, Christoph SchaeferHigh-resolution synthetic aperture radar device and antenna for one such radar
    US-8125370-B1February 28, 2012The United States Of America As Represented By The Secretary Of The NavyPolarimetric synthetic aperture radar signature detector

NO-Patent Citations (4)

    Title
    A.POTSIS ET AL.: "Sub-aperture algorithm for motion compensation improvement in wide-beam SAR data processing", 《ELECTRONICS LETTERS》
    KARLUSA.CâMARA DE MACEDO ET AL.: "Precise topography- and aperture- dependent motion compensation for airborne SAR", 《IEEE GEOSCIENCE AND REMOTE SENSING LETTERS》
    YAN-LEI LI ET AL.: "Improvements to the Frequency Division-Based Subaperture Algorithm for Motion Compensation in Wide-Beam SAR", 《IEEE GEOSCIENCE AND REMOTE SENSING LETTERS》
    李文超: "双基地前视合成孔径雷达运动补偿", 《中国博士学位论文全文数据库 信息科技辑》

Cited By (2)

    Publication numberPublication dateAssigneeTitle
    CN-105699970-AJune 22, 2016中国人民解放军国防科学技术大学一种用于合成孔径雷达大场景欺骗干扰的逆距离徙动方法
    CN-105974415-ASeptember 28, 2016西安电子科技大学, 西安中电科西电科大雷达技术协同创新研究院有限公司一种机载sar方位空变运动误差的高精度补偿方法