See-through Detection and 3D Reconstruction Using Terahertz Leaky-Wave Radar Based on Sparse Signal Processing

Koji Murata, Kosuke Murano, Issei Watanabe, Akifumi Kasamatsu, Toshiyuki Tanaka, Yasuaki Monnai

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We experimentally demonstrate see-through detection and 3D reconstruction using terahertz leaky-wave radar based on sparse signal processing. The application of terahertz waves to radar has received increasing attention in recent years for its potential to high-resolution and see-through detection. Among others, the implementation using a leaky-wave antenna is promising for compact system integration with beam steering capability based on frequency sweep. However, the use of a leaky-wave antenna poses a challenge on signal processing. Since a leaky-wave antenna combines the entire signal captured by each part of the aperture into a single output, the conventional array signal processing assuming access to a respective antenna element is not applicable. In this paper, we apply an iterative recovery algorithm “CoSaMP” to signals acquired with terahertz leaky-wave radar for clutter mitigation and aperture synthesis. We firstly demonstrate see-through detection of target location even when the radar is covered with an opaque screen, and therefore, the radar signal is disturbed by clutter. Furthermore, leveraging the robustness of the algorithm against noise, we also demonstrate 3D reconstruction of distributed targets by synthesizing signals collected from different orientations. The proposed approach will contribute to the smart implementation of terahertz leaky-wave radar.

Original languageEnglish
Pages (from-to)210-221
Number of pages12
JournalJournal of Infrared, Millimeter, and Terahertz Waves
Volume39
Issue number2
DOIs
Publication statusPublished - 2018 Feb 1

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Keywords

  • Leaky-wave antennas
  • Radar
  • Sparse signal processing
  • Synthetic aperture
  • Terahertz

ASJC Scopus subject areas

  • Radiation
  • Instrumentation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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