LFM信號(hào)誤差對(duì)SAR成像的影響分析
Effect of LFM error on the image of SAR
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摘要: 該文討論了線(xiàn)性調(diào)頻信號(hào)頻率線(xiàn)性度的定義，分析了線(xiàn)性調(diào)頻信號(hào)數(shù)字產(chǎn)生過(guò)程中，頻率線(xiàn)性度、相位誤差、幅頻特性不平坦產(chǎn)生的原因以及對(duì)SAR成像的影響。給出了計(jì)算機(jī)仿真結(jié)果。
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關(guān)鍵詞:
- 線(xiàn)性調(diào)頻; 頻率線(xiàn)性度; 幅頻不平坦; 相位誤差
Abstract: The definition of frequency linearity of LFM(Lincar Frequency Modulation) is discussed in this paper. The causes for frequency linearity, phase error and spectrum unevenness during the process of generation with digital method are analyzed. The effects of these errors on SAR image are also described. Finally, the simulation results are given in this paper. -
汪學(xué)剛等,線(xiàn)性調(diào)頻信號(hào)的線(xiàn)性度校正,電子學(xué)報(bào),1996,24(2),120-122.[2]汪學(xué)剛等,調(diào)頻線(xiàn)性度與零差拍線(xiàn)性調(diào)頻連續(xù)波雷達(dá)的距離分辨力,系統(tǒng)工程與電子技術(shù),1997,19(10),19-23.[3]宋景唯,線(xiàn)性度對(duì)線(xiàn)性調(diào)頻雷達(dá)距離分辨力的影響,電子科技大學(xué)學(xué)報(bào),1992,21(2),121-126.[4]孟憲德等,LFM信號(hào)調(diào)頻非線(xiàn)性測(cè)試技術(shù),哈爾濱工業(yè)大學(xué)學(xué)報(bào),1999,31(4),66-68.[5]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,1989,11,第四章.[6]張群英等,A/D量化誤差對(duì)脈沖壓縮結(jié)果的影響,現(xiàn)代雷達(dá),2000,22(2),63-68.[7]張群英等,寬帶線(xiàn)性調(diào)頻信號(hào)源設(shè)計(jì)報(bào)告,電子所內(nèi)部報(bào)告,2001. -
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