Stand-off real-time synthetic imaging at mm-wave frequencies

Matthias Kahl; Andreas Keil; Joern Peuser; Torsten Loeffler; Martin Paetzold; Andreas Kolb; Thorsten Sprenger; Bernd Hils; Peter Haring Bolívar

doi:10.1117/12.919104

8 May 2012 Stand-off real-time synthetic imaging at mm-wave frequencies

Matthias Kahl, Andreas Keil, Joern Peuser, Torsten Loeffler, Martin Paetzold, Andreas Kolb, Thorsten Sprenger, Bernd Hils, Peter Haring Bolívar

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Proceedings Volume 8362, Passive and Active Millimeter-Wave Imaging XV; 836208 (2012) https://doi.org/10.1117/12.919104
Event: SPIE Defense, Security, and Sensing, 2012, Baltimore, Maryland, United States

Abstract

We report on the development of an active stand-off imaging system operating in the 80 GHz - 110 GHz frequency range. 3D real-time imaging is enabled by a combination of a mechanically scanned one-dimensional conventional imaging projection with a rotating metallic reflector and a two-dimensional synthetic imaging reconstruction with a linear array of transmitter (Tx) and receiver (Rx) elements. The system is conceived, in order to allow a resolution better than 1cm both in lateral, as well as in range directions by using a multi-view imaging geometry with an aperture larger than 2 m x 2 m. The operation distance is 8.5 - 9 m. The 2D synthetically reconstructed imaging planes are derived from the correlation of 20 sources and 24 coherent detectors. Range information is obtained by operating in a frequency modulated continuous wave (FMCW) mode. Real-time imaging is enabled by implementing the synthetic image reconstruction algorithms on a general purpose graphics processing unit (GPGPU) system. A multi-view imaging geometry is implemented, in order to enhance the imaging resolution and to reduce the influence of specular reflections.

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Matthias Kahl, Andreas Keil, Joern Peuser, Torsten Loeffler, Martin Paetzold, Andreas Kolb, Thorsten Sprenger, Bernd Hils, and Peter Haring Bolívar "Stand-off real-time synthetic imaging at mm-wave frequencies", Proc. SPIE 8362, Passive and Active Millimeter-Wave Imaging XV, 836208 (8 May 2012); https://doi.org/10.1117/12.919104

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