用复射线展开法计算目标散射场的误差特性分析
ERROR ANALYSIS OF COMPLEX RAY EXPANSION METHOD FOR TARGET SCATTERING FIELD COMPUTATION
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摘要: 复射线展开法是计算目标散射场的一种简捷的方法,其可靠性有赖于对误差特性的系统研究。本文以平面波谱积分为散射场计算的参考标准,以L2空间中由范数定义的距离作为复射线展开法计算结果的误差,从而得到了复射线展开法在目标散射场计算中的误差特性,找到了减小误差的方法并给出这一方法的适用范围。Abstract: The complex ray expansion is a simple approach for target scattering field computation, whose effectiveness depends on the systematic investigation of its error. In this paper, plane wave spectral integral is used as a standard reference and the distance defined by norm in L2 space is introduced as the error function for comparison between the two methods, and then the error characteristics of complex ray expansion appoach for target scattering field computation are obtained. The way to decrease the error and the application range of the complex ray expansion method are also obtained.
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阮颖铮,编著.复射线理论及其应用.北京:电子工业出版社,1991,第四章.[2]Ling H, Chou R C, Lee S W. IEEE Trans. on AP, 1989, AP-37(2):194-205.[3]阮颖铮.电子学报,1999,17(3): 89-94.[4]Ruan Y Z, Feng W L. lEE Proc. -F, 1991, 138(5): 397-399.[5]Ruan Y Z, D u H P. J. Electronics (China), 1993, 10(1):71-78.[6]Felsen L B. Philips Res. Rep., 1975, 30(1):169-184. -
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