An Estimation Algorithm of Target Location and Scattered Waveforms for UWB Pulse Radar Systems

Takuya SAKAMOTO  Toru SATO  

Publication
IEICE TRANSACTIONS on Communications   Vol.E87-B   No.6   pp.1631-1638
Publication Date: 2004/06/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Sensing
Keyword: 
UWB pulse radar,  radar imaging,  waveform estimation,  non-parametric estimation,  neural network,  

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Summary: 
Radars utilizing ultra-wide-band (UWB) pulses are attractive as an environment measurement method for various applications including household robots. Suitable filtering is essential for accurate ranging, which requires an accurate waveform estimation. This paper presents a high-resolution algorithm of estimating target location and scattered waveforms, whose accuracies are interdependent. The technique relies on iterative improvements of estimated waveforms. Description of the algorithm is followed by statistical simulation examples. The performance of the algorithm is contrasted with conventional ones and statistical bounds. Results indicate that our proposed algorithm has a remarkable performance, which is close to the theoretical limit. Next, we clarify the problem of applying HCT to multiple targets. HCT for multiple targets can not be used as an estimated waveform because of interference waves from other targets. We propose an interference suppression algorithm based on a neural network, and show an application example of the algorithm.