1：Experimental Design and Method Selection:

The OFDM MIMO radar system was designed with a focus on spectrum efficiency, using a 30 MHz bandwidth for medium-range coverage up to 250 m and a wide field of view in azimuth. The system employs a 2 x 8 MIMO processing for high azimuth resolution and a 20 ms frame-based evaluation for high velocity resolution.

2：Sample Selection and Data Sources:

The measurement involved a dynamic scene with a person walking at a distance of 55 m at a speed of 1.5 m/s, using the radar prototype.

3：5 m/s, using the radar prototype. List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: The system consists of a digital board, a Local Oscillator (LO) generator, an RF stage including antennas, and a laptop for control and data transfer. The antennas include sectoral horn antennas for transmission and a uniform linear array of eight 4 x 1 element patch arrays for reception.

4：Experimental Procedures and Operational Workflow:

The radar system was controlled via a gigabit Ethernet interface, with data transferred to the laptop for processing. The OFDM waveforms were generated with a 1024 element Inverse Fast Fourier Transform (IFFT), and the received signals were processed to extract range, velocity, and azimuth information.

5：Data Analysis Methods:

The data was analyzed using FFT and IFFT techniques to reconstruct azimuth and velocity information, respectively, from the received signals.