基于擴展小波變換的機載SAR運動目標參數(shù)估計
AIRBORNE SAR MOVING TARGET PARAMETER ESTIMATION BASED ON EXTENDED WAVELET TRANSFORM
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摘要: 該文在分析機載合成孔徑雷達(SAR)運動目標回波信號頻譜特點的基礎上,基于擴展WVD(EWVD)變換理論提出了擴展小波變換(EWT)算法的基本思想,并針對分別利用擴展WVD變換和擴展小波變換方法進行機載SAR運動目標多普勒參數(shù)估計時的特點進行比較分析,指出基于擴展小波變換方法進行機載SAR運動目標回波信號參數(shù)估計的可行性及優(yōu)越性,微機仿真實驗結果驗證了其結論的正確性。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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