A Fast Algorithm for 3-Dimensional Imaging with UWB Pulse Radar Systems

Takuya SAKAMOTO  

Publication
IEICE TRANSACTIONS on Communications   Vol.E90-B   No.3   pp.636-644
Publication Date: 2007/03/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.3.636
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Sensing
Keyword: 
3-D,  imaging,  ultra-wideband (UWB),  pulse radar,  fast algorithm,  

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Summary: 
Ultra-wideband pulse radars are promising candidates for 3-dimensional environment measurements by autonomous robots. Estimating 3-dimensional target shapes by scanning with an omni-directional antenna is an ill-posed inverse problem. Conventional algorithms such as the synthetic aperture method or parametric algorithms have a problem in terms of their calculation times. We have clarified the existence of a reversible transform between received data and target shapes for 3-dimensional systems. Calculation times are remarkably reduced by applying this transform because it directly estimates target shapes without iterations. We propose a new algorithm based on the transform and present an application example using numerical simulations. We confirm that the proposed algorithm has sufficient accuracy and a short calculation time.