動(dòng)目標(biāo)合成孔徑雷達(dá)成像中的多普勒斜率匹配濾波
Moving Target Focusing by Doppler Slope Filters
-
摘要: 該文提出一種多普勒斜率匹配濾波方法，用于解決SAR對(duì)運(yùn)動(dòng)目標(biāo)成像中目標(biāo)回波調(diào)頻率變化引起的方位散焦問(wèn)題。該方法通過(guò)CFAR預(yù)檢測(cè)和迭代運(yùn)算解決了多普勒斜率估計(jì)精度與多普勒斜率濾波器組運(yùn)算量間的矛盾，有利于實(shí)時(shí)處理動(dòng)目標(biāo)成像和辨識(shí)。通過(guò)對(duì)運(yùn)動(dòng)目標(biāo)回波特點(diǎn)和真實(shí)運(yùn)動(dòng)目標(biāo)的成像分析證明了這一方法的可行性。
-
關(guān)鍵詞:
- 合成孔徑雷達(dá);運(yùn)動(dòng)目標(biāo);多普勒斜率估計(jì)
Abstract: This paper presents a new SAR Doppler slope filters method for detecting the cross range velocity of moving target. This method builds the Doppler slope filter group recursively and reduces the amount of operations. By analysis on the detection precision and range of target speed, the advantage and the limit of this method are indicated. The detection results from real data demonstrate the accuracy of the conclusion. -
Curlander J, McDnough R. Synthetic Aperture Radar System and Signal Processing, New York: Wiley, 1991, chapter 1, 2.[2]張澄波, 綜合孔徑雷達(dá)原理、系統(tǒng)分析與應(yīng)用, 北京: 科學(xué)出版社, 1989, 第四章.[3]Freeman A, Currie A. Synthetic aperture radar (SAR) images of moving targets. GEC Journal of Research, 1987, 5(2): 106-115.[4]DAddio E, Di Bisceglie M, Bottalico S. Detection of moving objects with airborne SAR[J].Signal Processing.1994, 36(2):149-162[5]Hern-Chung Chen, Clare D, McGillem. Target motion compensation by spectrum shifting in synthetic aperture radar. IEEE Trans. on AES , 1992, 28(3): 895-901.[6]李杰, 向敬成, 黃順吉. 合成孔徑雷達(dá)慢運(yùn)動(dòng)目標(biāo)成像處理的研究. 電子科技大學(xué)學(xué)報(bào), 1995, 24(2) : 119 -125. -
計(jì)量
- 文章訪問(wèn)數(shù): 2282
- HTML全文瀏覽量: 105
- PDF下載量: 850
- 被引次數(shù): 0
下載:
