Title :
Local MLACA for fast solution of large-scale scattering problems based on H-matrix structure
Author :
Lianfeng Ma ; Zaiping Nie ; Jun Hu
Author_Institution :
Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
In this paper, the local multilevel adaptive cross approximation (LMLACA) based on multilevel partition with H-matrix structure is developed. This structure can reduce the number of leaves related to the sub-block impedance matrix. In order to reduce the CPU memory and time further, variable tolerance of ACA algorithm based on physical mechanism is adopted. It is decided according to the distance between the two interaction sub-blocks. Numerical Results demonstrate the efficiency of LMLACA.
Keywords :
approximation theory; electromagnetic fields; electromagnetic wave scattering; impedance matrix; CPU memory; H-matrix structure; electrical field; large-scale scattering problem; local MLACA; local multilevel adaptive cross approximation; multilevel partition; physical mechanism; sub-block impedance matrix; H-matrix structure; adaptive cross approximation (ACA) method; condition number; curvilinear RWG basis function; matrix-vector multiplication; multilevel partition method;
Conference_Titel :
Microwave Technology and Computational Electromagnetics, 2009. ICMTCE. International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-84919-140-1
DOI :
10.1049/cp.2009.1364
