CAJ | 학술논문

文章基于快速多极子的远场近似思想，提出了应用小波变换区分远场作用组中的强作用单元和弱作用单元，并在计算中忽略弱作用单元的方法。该方法让聚集和解聚矩阵更为稀疏，从而加快了它们与向量的相乘过程，应用该方法和快速多极子分别对二维电大导体目标的雷达散射截面进行计算，并将得到的结果进行比较。实验结果表明该方法在不影响精度的同时，有效降低了计算复杂度，且在内存消耗上有了很大的改善。
문장기우쾌속다겁자적원장근사사상，제출료응용소파변환구분원장작용조중적강작용단원화약작용단원，병재계산중홀략약작용단원적방법。해방법양취집화해취구진경위희소，종이가쾌료타문여향량적상승과정，응용해방법화쾌속다겁자분별대이유전대도체목표적뢰체산사절면진행계산，병장득도적결과진행비교。실험결과표명해방법재불영향정도적동시，유효강저료계산복잡도，차재내존소모상유료흔대적개선。
Based on the far-field approximation thought of fast multipole method (FM M ) ,a method to differentiate important units and unimportant units in far-field group by discrete wavelet transform (DWT ) is proposed ,and these unimportant units are neglected in the computation . This method makes aggregation matrix and disaggregation matrix sparser ,and accelerates the speed of multiplica-tion of them and vector .T he proposed method and the traditional FM M are applied to calculating the radar cross section(RCS) of two-dimensional electrically large perfectly electrical conductor (PEC) ob-ject respectively ,and then the results obtained are compared .It is show n that the proposed method efficiently reduces the complexity of the computation without sacrificing much accuracy ,and saves much computer memory .