Acceleration for Shadow Region Imaging Algorithm with Multiple Scattered Waves for UWB Radars

Shouhei KIDERA

IEICE TRANSACTIONS on Communications   Vol.E94-B    No.9    pp.2696-2699
Publication Date: 2011/09/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E94.B.2696
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Sensing
UWB radars,  multiple scattered wave,  RPM,  shadow region imaging,  

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Ultra-wide band (UWB) pulse radar has high range resolution, and is thus applicable to imaging sensors for a household robot. To enhance the imaging region of UWB radar, especially for multiple objects with complex shapes, an imaging algorithm based on aperture synthesis for multiple scattered waves has been proposed. However, this algorithm has difficulty realizing in real-time processing because its computation time is long. To overcome this difficulty, this letter proposes a fast accurate algorithm for shadow region imaging by incorporating the Range Points Migration (RPM) algorithm. The results of the numerical simulation show that, while the proposed algorithm affects the performance of the shadow region imaging slightly, it does not cause significant accuracy degradation and significantly decreases the computation time by a factor of 100 compared to the conventional algorithm.