合成孔徑雷達成像之數據驅動式跨軌道運動補償策略

Abstract

本論文提出九種策略來補償合成孔徑雷達成像時因載具路徑偏差而造成的影像模糊。在只使用接收訊號的前提下，透過萃取分段孔徑的相位來估計相位係數，再利用兩種方法來估計路徑偏差量。本論文並考慮四種代表性的載具路徑偏移模式來比較各種策略的結果，亦考慮雜訊對各種策略的影響程度。

Nine different strategies are proposed to compensate the cross-track motion errors in synthetic aperture radar (SAR) imaging, based on estimating the phase coefficients of the phase history. A spline interpolation method and a subaperture reconstruction method are used to derive the phase history over the whole aperture, based on the phase coefficients previously estimated. Four different scenarios are designed to compare the performance of these nine strategies.