基于GNSS信号的双基地SAR成像算法

Q2 Physics and Astronomy

雷达学报 Pub Date : 2013-02-01 DOI:10.3724/SP.J.1300.2013.20092

Weiming Tian, Zeng Tao, Hu Cheng

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引用次数: 3

摘要

研究了一种利用导航卫星对双基地合成孔径雷达(BiSAR)进行成像处理的方法。针对利用全球导航卫星系统(GNSS)信号形成SAR图像的特殊问题，采用直接信号估计距离偏移参数，并在方位角时域对距离偏移进行校正。采用多普勒补偿方法求解相位编码信号的多普勒灵敏度。通过高阶多项式拟合多普勒相位历史，精确逼近多普勒相位历史，并通过去啁啾处理实现方位角压缩。通过仿真和实验数据处理，验证了该方法的有效性。

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Imaging Algorithm for Bistatic SAR Based on GNSS Signal

In this paper, an imaging processing method for Bistatic Synthetic Aperture Radar (BiSAR) utilizing navigation satellites is investigated. Considering the special problems regarding the use of Global Navigation Satellite System (GNSS) signals to form SAR images, direct signals are used to estimate range migration parameters, and range migration is corrected in the azimuth time domain. The Doppler sensitivity of phase-coded signals was solved by Doppler compensation. By fitting the Doppler phase history with a high-order polynomial, the Doppler phase history is accurately approximated and the azimuth compression is implemented by de-chirp processing. By performing simulations and experimental data processing, the proposed method is verified.

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来源期刊

雷达学报 Physics and Astronomy-Instrumentation

CiteScore

4.10

自引率

0.00%

发文量

882

期刊介绍： Information not localized