Radar imaging of building interiors

Radar imaging of building interiors

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Through-the-wall radar imaging (TWRI) provides the capability to see inside buildings using electromagnetic waves for both defence and civilian applications. Unlike traditional free-space radar operation, the presence of walls introduces unique challenges that need to be addressed to render TWRI a viable technology. In this chapter, we present a review of various approaches for building layout determination and imaging of stationary indoor scenes. These approaches effectively address the associated challenges to provide effective and reliable radar operation. Specifically, we consider both ground-based and airborne radar operation and discuss both non-adaptive time-domain and frequency-domain beamforming approaches for through-the-wall image formation of stationary scenes and feature extraction-based building layout determination methods.

Chapter Contents:

  • Abstract
  • 14.1 Introduction
  • 14.2 Beamforming for imaging stationary indoor scenes
  • 14.2.1 Data-independent beamforming
  • 14.2.2 Compensation of wall propagation effects
  • 14.3 SAR imaging using attributed scattering centre features for characterization of building interior structure
  • 14.3.1 Canonical scattering models
  • 14.3.2 Feature extraction
  • 14.3.3 Illustrative example
  • 14.4 Correlogram-based pattern matching for building feature extraction
  • 14.4.1 Illustrative example
  • 14.5 Building feature extraction using overcomplete dictionaries
  • 14.5.1 OCD design
  • 14.5.2 Atom definition
  • 14.5.3 Illustrative example
  • 14.6 Conclusion
  • List of acronyms
  • References

Inspec keywords: electromagnetic waves; radar imaging; buildings (structures); airborne radar; array signal processing; feature extraction

Other keywords: stationary indoor scene imaging; through-the-wall image formation; building layout determination; feature extraction; TWRI; airborne radar operation; electromagnetic waves; civilian applications; defence applications; nonadaptive time-domain beamforming; frequency-domain beamforming; ground-based radar operation; through-the-wall radar imaging; building interiors

Subjects: Radar theory; Radar equipment, systems and applications; Image recognition

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