3D inhomogeneous inversion for microwave imaging using distorted born iterative method and BCG-FFT

Hong Gan, Weng Cho Chew

Research output: Contribution to journalConference article

Abstract

The computational efficiency in 3D microwave inversion is addressed by extending the idea in a recent paper for 2D problems to 3D vector fields. The method proposed here is based on recently developed fast computation algorithm for 3D dielectric scattered field. This fast algorithm combines biconjugate gradient method with fast Fourier transform (BCG-FFT). A weighted mean square residual combined with Tikhonov regularization is used to measure the goodness of the reconstructed results and the optimal solution is searched iteratively using a conjugate gradient procedure. The computational complexity of the inverse process is analyzed when the BCG-FFT algorithm is used to implement the operations of the Frechet derivative operator. Some computer simulation results demonstrate the efficiency of this algorithm, especially when the number of illumination angles is limited.

Original languageEnglish (US)
Pages (from-to)1614-1617
Number of pages4
JournalIEEE Antennas and Propagation Society, AP-S International Symposium (Digest)
Volume3
StatePublished - Jan 1 1995
EventProceedings of the 1995 IEEE Antennas and Propagation Society International Symposium. Part 4 (of 4) - Newport Beach, CA, USA
Duration: Jun 18 1995Jun 23 1995

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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