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Staggered Grid Scheme for the FFT-Based Methods

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A staggered grid scheme is proposed to reduce both the total memory requirement and the CPU time of generating the corrected near matrix in the FFT-based methods.Two sets of Cartesian grids are used to project the source points and the field points,respectively.The proposed method does not lower the efficiency of computing far matrix-vector products,compared with the traditional uniform Cartesian grid scheme.Some numerical experiments are provided to demonstrate both the correctness and the efficiency of the proposed method.

Green's functionSingularityRFG-FFTStaggered grid schemeCorrected near matrix

XIE Jiaye、KONG Weibin、PANG Lili、SONG Weiju、HUANG Zhixiang、WU Xianliang

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Industrial Center, Nanjing Institute of Technology, Nanjing 211167, China

State Key Laboratory of Millimeter Waves, Nanjing 210096, China

College of Information Engineering, Yancheng Institute of Technology, Yancheng 224051, China

Key Laboratory of Intelligent Computing and Signal Processing, Ministry of Education, Anhui University, Hefei 230601,China

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This work was supported by The Natural Science Foundation of the Higher Education Institutions of Jiangsu ProvinceThis work was supported by The Natural Science Foundation of the Higher Education Institutions of Jiangsu ProvincePhD Research Startup Foundation of Nanjing Institute of TechnologyPhD Research Startup Foundation of Nanjing Institute of TechnologyOpen Research Program of State Key Laboratory of Millimeter Waves in Southeast UniversityOpen Research Program of State Key Laboratory of Millimeter Waves in Southeast UniversityNational Science Foundation for Outstanding Young Scholar of China

15KJB51001417KJB510022YKJ201443YKJ201444K201718K20173161722101

2019

10.1049/cje.2019.06.002

中国电子杂志(英文版)

中国电子杂志(英文版)

CSTPCDCSCDSCIEI
ISSN：1022-4653
年,卷(期)：2019.28(5)
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