Robust and Accurate Image Expansion Algorithm Based on Double Scattered Range Points Migration for UWB Imaging Radars

• KIDERA Shouhei

  Graduate School of Informatics and Engineering, The University of Electro-Communications

• KIRIMOTO Tetsuo

  Graduate School of Informatics and Engineering, The University of Electro-Communications

Abstract

UWB (Ultra Wideband) radar offers great promise for advanced near field sensors due to its high range resolution. In particular, it is suitable for rescue or resource exploration robots, which need to identify a target in low visibility or acoustically harsh environments. Recently, radar algorithms that actively coordinate multiple scattered components have been developed to enhance the imaging range beyond what can be achieved by synthesizing a single scattered component. Although we previously developed an accurate algorithm for imaging shadow regions with low computational complexity using derivatives of observed ranges for double scattered signals, the algorithm yields inaccurate images under the severe interference situations that occur with complex-shaped or multiple objects or in noisy environments. This is because small range fluctuations arising from interference or random noises can produce non-negligible image degradation owing to inaccuracy in the range derivative calculation. As a solution to this difficulty, this paper proposes a novel imaging algorithm that does not use the range derivatives of doubly scattered signals, and instead extracts a feature of expansive distributions of the observed ranges, using a unique property inherent to the doubly scattering mechanism. Numerical simulation examples of complex-shaped or multiple targets are presented to demonstrate the distinct advantage of the proposed algorithm which creates more accurate images even for complicated objects or in noisy situations.

Journal

• IEICE Transactions on Communications

  IEICE Transactions on Communications E96.B (4), 1061-1069, 2013

  The Institute of Electronics, Information and Communication Engineers

Keywords

• UWB radar
• double scattered wave
• shadow region imaging
• range points migration (RPM)

Details

• CRID: 1390001204375898624
• NII Article ID: 10031182811
• NII Book ID: AA10826261
• DOI: 10.1587/transcom.e96.b.1061
• ISSN: 17451345
• ISSN: 09168516
• Web Site: https://www.jstage.jst.go.jp/article/transcom/E96.B/4/E96.B_1061/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed