基于SFCW雷达的多场景墙体参数反演
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摘要
穿墙探测所处的外界环境内通常存在多种散射体,是否存在金属物品、有无人体对墙体参数反演具有不同的影响,进而影响穿墙定位与成像的准确性。将不同的外界环境分为不同场景,根据电磁波传播理论和菲涅尔公式建立电磁波穿墙传播模型,并详细阐述了用于提高步进扫频连续波(stepped frequency continuous wave,SFCW)穿墙雷达分辨率的Extend Prony算法和墙体参数快速反演算法,得出一种反演墙体介电常数和厚度的方法,并在墙后无散射体场景、墙后存在金属物体场景和墙后存在人体场景多场景中进行实验,最后将真实值与实验结果对比,表明在不同场景中具有较强适应性,反演出的墙体参数是现场穿墙探测的重要参考依据。
Through-Wall detection is usually in the external environment with many scatterers.Whether metal objects or people exist or not has different effects on wall parameters inversion,and further affects the accuracy of locating and imaging through the wall.Different external environment is simplified different scenes.A model of electromagnetic wave propagation through the wall is built according to the theory of electromagnetic wave propagation and the Fresnel equations,and the theory and procedure of extend prony method for enhancement resolution in a SFCW through-wall radar and wall parameters inversion fast algorithm are described.A method of wall permittivity and thickness inversion is presented,and the experiment is performed in multi-scenes.At last,the results of the experiments are contrasted with the true value.It is concluded that the method is highly adaptable in different scenes,and the wall parameters calculated are valuable references of through-wall detection in reality.
Through-Wall detection is usually in the external environment with many scatterers.Whether metal objects or people exist or not has different effects on wall parameters inversion,and further affects the accuracy of locating and imaging through the wall.Different external environment is simplified different scenes.A model of electromagnetic wave propagation through the wall is built according to the theory of electromagnetic wave propagation and the Fresnel equations,and the theory and procedure of extend prony method for enhancement resolution in a SFCW through-wall radar and wall parameters inversion fast algorithm are described.A method of wall permittivity and thickness inversion is presented,and the experiment is performed in multi-scenes.At last,the results of the experiments are contrasted with the true value.It is concluded that the method is highly adaptable in different scenes,and the wall parameters calculated are valuable references of through-wall detection in reality.
引文
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[13]李传江,费敏锐,胡豁生,等.基于谐波小波和Prony算法的转子不平衡信号提取[J].仪器仪表学报,2012,33(11):2516-2522.
[14]张照,林曙光,任强,等.Extend Prony算法在提高步进扫频连续波探地雷达分辨率中的应用[J].地球物理学进展,2013,28(6):3231-3236.
[15]LIU CH,XU L J,CAO ZH.Measurement of nonuniform temperature distribution by combining line-of-sight TDLAS with regularization methods[J].Instrumentation,2014,1(3):43-57.
[2]曾昭发,刘四新,冯晅,等.探地雷达原理与应用[M].北京:电子工业出版社,2010.
[3]李南京,党娇娇,胡楚峰.标准球定位获取复杂目标散射点位置信息技术[J].国外电子测量技术,2014,33(9):31-33.
[4]王涵宁,陆必应,周智敏,等.基于墙体参数估计的穿墙成像与校正算法[J].雷达科学与技术,2011,9(5):430-436.
[5]晋良念,钱玉彬,刘庆华,等.超宽带穿墙雷达偏离网格目标稀疏成像方法[J].仪器仪表学报,2015,36(4):743-748.
[6]史洪印,赵欣悦.基于CS的SAR旋转微动目标检测方法研究[J].仪器仪表学报,2015,36(6):1342-1349.
[7]王扬,朱振乾,陈明,等.穿墙生命探测系统干扰抑制方法的研究与实现[J].电子测量技术,2009,32(9):34-37.
[8]丁一鹏,方广有.一种高性能的连续波穿墙定位系统研究[J].仪器仪表学报,2012,33(12):2781-2788.
[9]AFTANAS M,SACHS J,DRUTAROVSKY M,et al.Efficient and fast method of wall parameter estimation by using UWB radar system[J].Frequenz Journal,2009,63(11-12):231-235.
[10]THAJUDEEN C,HOORFAR A.Wall parameter estimation using a hybrid time-delay-only and reflected wave ratio technique[C].IEEE International Symposium on Antennas&Propagation&Usnc/ursi National Radio Science Meeting,2013,9(6):526-527.
[11]PROTIVA P,MRKVICA J,MACHAC J.Estimation of wall parameters from time-delay-only through-wall-radar measurements[J].IEEE Transactions on Antennas&Propagation,2011,59(11):4268-4278.
[12]张亮,李梅,张新燕.基于Prony理论的高压输电线保护算法[J].电气自动化,2013,35(2):40-42.
[13]李传江,费敏锐,胡豁生,等.基于谐波小波和Prony算法的转子不平衡信号提取[J].仪器仪表学报,2012,33(11):2516-2522.
[14]张照,林曙光,任强,等.Extend Prony算法在提高步进扫频连续波探地雷达分辨率中的应用[J].地球物理学进展,2013,28(6):3231-3236.
[15]LIU CH,XU L J,CAO ZH.Measurement of nonuniform temperature distribution by combining line-of-sight TDLAS with regularization methods[J].Instrumentation,2014,1(3):43-57.