摘要
提出一种将离散小波变换和渐近波形估计技术应用到矩量法中求解组合场积分方程的方法,再结合共轭梯度法和广义最小余量法,对平面波照射下任意形状二维电大导体目标的电磁散射特性进行分析,可实现目标宽带雷达散射截面的快速计算.组合场积分方程的使用消除了内谐振问题.将计算结果与传统矩量法进行比较,结果表明,基于离散小波变换的AWE(asymptotic wave-form evaluation)技术在提高计算效率和节约存储空间方面具有明显优势.
The asymptotic waveform evaluation （AWE） technique based on discrete wavelet transform （DWT） was applied to the method of moments to solve combined-field integral equation （CFIE）. The wide-band radar cross section of arbitrarily shaped two-dimensional perfect electric conduct object was calculated with the AWE technique based on DWT combined with conjugate gradient （CG） and generalized minimal residual （GMRES） methods. The employment of CFIE eliminates interior resonance problems. The numerical results were compared with the results obtained by the method of moments. It was shown that the computational efficiency was improved greatly and that the memory needed was reduced drastically.
基金
安徽省教育厅重点科研项目(2004kj002zd)
安徽省高校"十五"优秀人才计划项目资助
关键词
离散小波变换
渐近波形估计
组合场积分方程
共轭梯度
广义最小余量法
discrete wavelet transform
asymptotic waveform evaluation
combined-field integral equation
conjugate gradient method
generalized minimal residual method
