基于擴(kuò)展小波變換的機(jī)載SAR運(yùn)動(dòng)目標(biāo)參數(shù)估計(jì)
AIRBORNE SAR MOVING TARGET PARAMETER ESTIMATION BASED ON EXTENDED WAVELET TRANSFORM
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摘要: 該文在分析機(jī)載合成孔徑雷達(dá)(SAR)運(yùn)動(dòng)目標(biāo)回波信號(hào)頻譜特點(diǎn)的基礎(chǔ)上,基于擴(kuò)展WVD(EWVD)變換理論提出了擴(kuò)展小波變換(EWT)算法的基本思想,并針對(duì)分別利用擴(kuò)展WVD變換和擴(kuò)展小波變換方法進(jìn)行機(jī)載SAR運(yùn)動(dòng)目標(biāo)多普勒參數(shù)估計(jì)時(shí)的特點(diǎn)進(jìn)行比較分析,指出基于擴(kuò)展小波變換方法進(jìn)行機(jī)載SAR運(yùn)動(dòng)目標(biāo)回波信號(hào)參數(shù)估計(jì)的可行性及優(yōu)越性,微機(jī)仿真實(shí)驗(yàn)結(jié)果驗(yàn)證了其結(jié)論的正確性。Abstract: This paper presents the basic concept of Extended Wavelet Transform (EWT) algorithm based on Extended WVD (EWVD) transform theory after analyzing the spectrum characteristics of airborne SAR moving-target backscatters, and then takes a comparison and analysis on airborne SAR moving-target Doppler parameters estimation by EWVD and EWT methods respectively. The flexibility and advantage of airborne SAR moving-target Doppler parameters estimation based on EWT method are indicated and the simulating experimental results demonstrate the accuracy of our conclusion.
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