Multiple-Input-Multiple-Output (MIMO) radars have been shown to improve target detection for surveillance applications thanks to their proven high performance properties. In this paper, the design, implementation and results of a complete three-dimensional (3D) imaging Frequency Modulated Continuous Wave (FMCW) MIMO Radar demonstrator are presented. The radar sensor working frequency range spans between 16 GHz and 17 GHz and the proposed solution is based on a 24 transmitters and 24 receivers MIMO radar architecture, implemented by time division multiplexing (TDM) of the transmit signals. A modular approach based on conventional low cost Printed Circuit Boards (PCB) is used for the transmit and receive system. Using digital beam-forming (DBF) algorithms and radar processing techniques on the received signals, a high resolution 3D sensing of the range, azimuth and elevation can be calculated. With the current antenna configuration, an angular resolution of 2.9 • can be reached. Furthermore, by taking advantage of the 1 GHz bandwidth of the system, a range resolution of 0.5 m is achieved. The radio-frequency (RF) front-end, digital system and radar signal processing units are here presented. The medium range surveillance potential and the high resolution capabilities of the MIMO radar are proven with results in the form of radar images captured from on the field measurements.
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