Millimeter Wave Short Range SAR Imaging using Cross-Polarized Radar System

Mostafa El Saadouny, Jan Barowski, Ilona Rolfes

IEEE 9th Annual Information Technology, Electronics and Mobile Communication Conference (IEMCON), pp. 475-478, DOI: 10.1109/IEMCON.2018.8615032, British Columbia, Vancouver, Canada, Nov 1-3, 2018


Abstract

In this work measurement results from a polarimetric millimeter wave radar measurement setup are presented. A cross-polarized antenna is used for rectangular-scan mode for the synthetic aperture radar, and the signal processing is achieved by a 2D and 3D matched filter approach. The used radar system has separate transmit and receive channels, which can be combined using an orthogonal mode transducer. The mechanical setup of the experiments is based on a stationary antenna, an x-y positioning table and the object under test. Different measurements were done in order to investigate the imaging performance and the obtained point spread function using rectangular synthetic apertures arrays. The mathematical model for this short range imaging is illustrated briefly in this paper, and the signal processing algorithm is presented based on the 2D/3D matched filtering. The matched filter is one of the most straight forward methods, but at the same time it is undeniably computationally complex, however, in our algorithm it has been ported to run on Graphical Processing Unit(GPU) instead of a standard CPU, to achieve significant speedups.

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