关键词: 并行时域有限差分, 快速傅里叶变换, 勒让德多项式, 近场校正, 电磁跟踪

Abstract:

To study the accuracy of magneticdipole position model, the parallelfinite difference time domain (parallelFDTD) arithmetic is presented on a distributed network. The message passing module and space decomposition technique are applied. In FDTD application, simulation of low frequency exciting source is very difficult. The fast Fourier transform arithmetic is introduced to analyze the magnetic characteristic of some special frequency by using Gaussian pulse exciting source. The nearfield position model and the calibration arithmetic are set up based on the Lagendre polynomial. The effects of position distance on magneticdipole position model and parameters position error rule are analyzed. Numerical results validates that the parameters accuracy could be improved by the Lagendre polynomial nearfield calibration model.

Key words: parallelfinite difference time domain, fast Fourier transform, Lagendre polynomial, nearfield calibration, electromagnetic tracker