8 May 2012 Stand-off real-time synthetic imaging at mm-wave frequencies
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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, Matthias Kahl, Andreas Keil, Andreas Keil, Joern Peuser, Joern Peuser, Torsten Loeffler, Torsten Loeffler, Martin Paetzold, Martin Paetzold, Andreas Kolb, Andreas Kolb, Thorsten Sprenger, Thorsten Sprenger, Bernd Hils, Bernd Hils, Peter Haring Bolívar, 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); doi: 10.1117/12.919104; https://doi.org/10.1117/12.919104
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