Passive bistatic ground-based synthetic aperture radar: Concept, system, and experiment results

Weike Feng, Jean Michel Friedt, Giovanni Nico, Suyun Wang, Gilles Martin, Motoyuki Sato

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A passive bistatic ground-based synthetic aperture radar (PB-GB-SAR) system without a dedicated transmitter has been developed by using commercial-off-the-shelf (COTS) hardware for local-area high-resolution imaging and displacement measurement purposes. Different from the frequency-modulated or frequency-stepped continuous wave signal commonly used by GB-SAR, the continuous digital TV signal broadcast by a geostationary satellite has been adopted by PB-GB-SAR. In order to increase the coherence between the reference and surveillance channels, frequency and phase synchronization of multiple low noise blocks (LNBs) has been conducted. Then, the back-projection algorithm (BPA) and the range migration algorithm (RMA) have been modified for PB-GB-SAR to get the focused SAR image. Field experiments have been carried out to validate the designed PB-GB-SAR system and the proposed methods. It has been found that different targets within 100 m (like the fence, light pole, tree, and car) can be imaged by the PB-GB-SAR system. With a metallic plate moved on a positioner, it has been observed that the displacement of the target can be estimated by PB-GB-SAR with submillimeter accuracy.

Original languageEnglish
Article number1753
JournalRemote Sensing
Volume11
Issue number15
DOIs
Publication statusPublished - 2019 Aug 1

Keywords

  • Displacement estimation
  • Ground-based synthetic aperture radar (GB-SAR)
  • Passive bistatic radar (PBR)
  • Satellite digital TV signal
  • Synthetic aperture radar (SAR) imaging

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

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