Automotive MIMO OFDM Radar Demonstrator with 3D-Printed Waveguide Antennas

Digital radar sensors are becoming increasingly popular for various applications. On the one hand, they offer a wide range of possibilities for generating uncorrelated signals for massive multiple-input multiple-output systems as well as for the synchronization of radar networks. On the other hand, the high sampling rates and memory sizes still pose a major challenge for implementation. This paper describes an OFDM radar demonstrator for automotive applications at 79 GHz, which enables wide signal bandwidths of up to 2 GHz. In addition, an exchangeable 3D-printed waveguide antenna array with four transmit and receive channels is used. Exemplary radar measurements prove the functionality of the demonstrator and show its range and angle separation capabilities using real objects.