星載合成孔徑雷達(dá)多普勒調(diào)頻率估計(jì)精度分析
Accuracy of Estimation of Doppler Frequency Rate for Spaceborne SAR
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摘要: 該文分析了星載合成孔徑雷達(dá)成像處理中多普勒調(diào)頻率估計(jì)與系統(tǒng)參數(shù)及圖像特性的關(guān)系,給 出了利用軌道數(shù)據(jù)或回波信號(hào)數(shù)據(jù)估計(jì)多普勒調(diào)頻率的精度與圖像分辨率、雷達(dá)系統(tǒng)參數(shù)、軌道數(shù)據(jù)精度和 地物散射特性之間的關(guān)系。這些結(jié)論對(duì)系統(tǒng)的設(shè)計(jì),以及數(shù)據(jù)處理方法的選擇具有重要的參考價(jià)值。Abstract: This paper analyzes Doppler frequency rate, parameters of system and images quality , and provides the relationship among accuracy of Doppler frequency rate, resolution of images, parameters of radar system, accuracy of orbit data and electromagnetic parameters of imaging area. These results are useful for system design and data processing.
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Prati C, Rocca F, Kost Y, Damonti E. Blind deconvolution for Doppler centoid estimation in high freguency SAR[J].IEEE Trans. on Geosci. and Remote Sensing.1991, 29(6):934-941[2]Li F K, Held D N, Curlander J C, Wu C. Doppler parameter estimation for spaceborne synthetic aperture radar[J].IEEE Trans. on Geosci. and Remote Sensing.1985, 23(1):47-55[3]Wong F, Cumming I G. A combined SAR Doppler centroid estimation scheme based upon signal phase[J].IEEE Trans. on Geosci. and Remote Sensing.1996, 34(3):696-707[4]Bamler R. Doppler frequency estimation and the Cramer-Rao bound[J].IEEE Trans. on Geosci.and Remote Sensing.1991, 29(3):385-390[5]Curlander J C.[J].McDonough R H. Synthetic Aperture Radar: System and Signal Processing. Inc.New York, John WileySons.1991,:- -
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