Spectrum-Efficient Real-Time Ofdm Mimo Radar For Moving Target Detection In Medium-Range Applications

This paper presents the first measurement results of a new Orthogonal Frequency Division Multiplexing ( OFDM) Multiple Input Multiple Output ( MIMO) Radar prototype. It is designed to be operated in a dynamic multi-user environment where the individual sensor's RF bandwidth is very limited. Here, the radar uses only 30 MHz. The targeted applications are in the field of Urban ( Air) Mobility ( UAM) with a medium-range coverage up to 250 m. Another requirement is to observe a wide field of view in azimuth of about 100 degree with a high resolution in azimuth. This was implemented by using a 2 x 8 MIMO processing. A 20 ms frame based evaluation of the OFDM symbols allows to obtain a very high velocity resolution of below 1 m/s. This paper explains details about the radar system, the waveform and the processing but the main part of the paper focuses on the evaluation of a dynamic measurement.