一種改進(jìn)的對(duì)SAR的彈射式干擾方式
An Improved Rebound Jamming to SAR
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摘要: 根據(jù)普通對(duì)SAR的彈射式干擾的不足,提出了一種改進(jìn)的彈射式干擾。改進(jìn)的彈射式干擾將干擾機(jī)轉(zhuǎn)發(fā)時(shí)延設(shè)置成隨機(jī)變量,這樣干擾信號(hào)在方位上就不再是線性調(diào)頻信號(hào),干擾信號(hào)在方位壓縮處理過(guò)程中就不會(huì)被壓縮。改進(jìn)的彈射式干擾將覆蓋整個(gè)成像區(qū)域,而普通的彈射式干擾只能覆蓋部分區(qū)域,因此改進(jìn)的彈射式干擾具有明顯的優(yōu)越性。通過(guò)計(jì)算機(jī)仿真得到了干擾效果圖,得到的干擾圖像類似噪聲干擾,很好地驗(yàn)證了理論的正確性。最后具體分析了改進(jìn)的干擾方式的優(yōu)越性。
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關(guān)鍵詞:
- SAR; 干擾; RD算法
Abstract: An improved rebound jamming way named Random Delay Rebound Jamming (RDRJ) to SAR (Synthetic Aperture Radar) is investigated. Not like the normal rebound jamming, the jammers delay time is set randomly between every pulse. The disturbing signal is Linearly Frequency Modulated (LFM) in range direction and not in azimuth direction. The analyses and computer simulation show that the RDRJ method provides a good way to jamming SAR. The advantage of the RDRJ is analyzed finally. -
胡東輝,吳一戎.合成孔徑雷達(dá)散射波干擾研究.電子學(xué)報(bào),2002,30(12):1882-1884.[2]甘榮兵,王建國(guó),何川.對(duì)合成孔徑雷達(dá)的彈射式干擾性能分析.信號(hào)處理,2003,19(增):382-385.[3]劉永坦.雷達(dá)成像技術(shù).哈爾濱:哈爾濱工業(yè)大學(xué)出版社,1999,第3.1節(jié).[4]Mehrdad Soumekh.Synthetic Aperture Radar Signal Processing with MATLAB Algorithms.New York:J.Wiley,1999,Chapter 1,2. -
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