基于DPCA技術(shù)的星載SAR/GMTI處理方法
An Algorithm of Spaceborne SAR/GMTI Based on DPCA
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摘要: 星載合成孔徑雷達(dá)的軌道運(yùn)動(dòng)以及地球自轉(zhuǎn)、地球曲率等因素使星載SAR/GMTI處理方法與機(jī)載不同。該文首先分析了星載SAR三孔徑天線信號(hào)特性，然后給出并詳細(xì)分析了基于偏置相位中心天線(DPCA)的機(jī)載SAR/GMTI處理方法。在此基礎(chǔ)上，給出了一種基于DPCA技術(shù)的星載SAR動(dòng)目標(biāo)檢測(cè)、測(cè)速及目標(biāo)定位的實(shí)現(xiàn)方法。最后，星載SAR/GMTI計(jì)算機(jī)仿真結(jié)果驗(yàn)證了該方法的有效性。
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關(guān)鍵詞:
- 星載合成孔徑雷達(dá);GMTI;雜波抑制;偏置相位中心天線
Abstract: Such factors as complicated spaceborne SAR orbital motion, earth rotation, earth surface curvature etc. make the realization of spaceborne SAR/GMTI different from airborne SAR/GMTI. In this paper, the property of three-antenna spaceborne SAR is analyzed firstly, and then the method of airborne SAR/GMTI processing is given and analyzed. On the basis of airborne SAR/GMTI, an algorithm of spaceborne SAR moving target detection, radial velocity estimation and relocation based on DPCA technique is presented. Finally, spaceborne SAR/GMTI computer simulation results validate its effectiveness. -
Stockburger E F, Held D N. Interferometric moving ground target imaging [J]. IEEE International Radar Conference, Washington DC, May 8-11, 1995: 438-443.[2]Kim Corcoran. Higher eyes in the sky: the feasibility of moving AWACS and JSTARS functions into space. ADA391375, Jun 1998.[3]Whelan D A. Discoverer II program summary [J]. Radar Conference, 2000. The Record of the IEEE 2000 International, Alexandria, VA, USA, May 7-12, 2000: 7-8.Nohara T J, Weber P, et al.. SAR-GMTI processing with Canadas radarsat 2 satellite [J]. Adaptive Systems for Signal Processing, Communications, and Control Symposium, Lake Louise, AB, Canada, October 1-4, 2000: 379-384.[4]Wu Chialin, Liu K Y, Jin Michael. Modeling and a correlation algorithm for spaceborne SAR signals [J].IEEE Trans. on Aerospace and Electronic Systems.1982, 18(5):563-574[5]李景文. 合成孔徑雷達(dá)動(dòng)目標(biāo)檢測(cè)與成像[D]. [博士論文], 北京：北京航空航天大學(xué), 1999.9. -
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