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首页> 外文期刊>Geoscience and Remote Sensing Letters, IEEE >A Novel Doppler Chirp Rate and Baseline Estimation Approach in the Time Domain Based on Weighted Local Maximum-Likelihood for an MC-HRWS SAR System
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A Novel Doppler Chirp Rate and Baseline Estimation Approach in the Time Domain Based on Weighted Local Maximum-Likelihood for an MC-HRWS SAR System

机译:MC-HRWS SAR系统中基于加权局部最大似然的时域多普勒线性调频率和基线估计新方法

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摘要

In this letter, a novel estimation approach for the Doppler chirp rate and baseline in azimuth is proposed for the multichannel in azimuth high-resolution and wide-swath (HRWS) synthetic aperture radar (SAR) system. First, a range-invariant Doppler chirp rate estimation approach is developed based on a map drift algorithm and correlation function method. Then, a weighted local maximum-likelihood approach is adopted to obtain an accurate estimation of the range-variant Doppler chirp rate. With an accurate Doppler chirp rate, the baseline in azimuth can be estimated, which is developed from the correlation function between the echoes of adjective channels. The proposed approaches are successfully applied to process real five-channel HRWS SAR echo data, demonstrating the efficacy of the proposed methods.
机译:在这封信中,针对方位角高分辨率和宽幅(HRWS)合成孔径雷达(SAR)系统中的多通道,提出了一种新的多普勒线性调频率和方位角估计方法。首先,基于地图漂移算法和相关函数方法,开发了一种距离不变的多普勒线性调频率估计方法。然后,采用加权局部最大似然法来获得距离变化多普勒线性调频脉冲率的准确估计。利用准确的多普勒线性调频率,可以估计方位角的基线,这是由形容词通道回波之间的相关函数得出的。所提出的方法已成功应用于处理实际的五通道HRWS SAR回波数据,证明了所提出方法的有效性。

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