24GHz FMCW Radar Indoors Mobile

We use AncorTek’s SDR-KIT 2400AD2, a low-power and compact software-defined radar for FMCW-based sensing, sitting at the top deck of the prototype mobile node. The center frequency of transmitted signal is adjustable within the 24-26 GHz frequency band. AncorTek provides drivers only for Windows, and thus, we use a Windows laptop to receive and store the complex in-phase and quadrature (I/Q) components of the received FMCW radar signal in a .dat file. Maximum allowed duration using the AncorTek software is 10 minutes and thus the length of a single experiment is 10 minutes. For the AncorTek radar’s operation settings, we choose a bandwidth of 2 GHz at a center frequency 25 GHz during all our experiments. Each chirp is of 1 ms duration with 128 samples per chirp. With these settings, the range resolution and the maximum range that can be measured are 0.075 m and 4.8 m, respectively. Also, the maximum radial velocity that can be measured is 3 m/s. The radial velocity resolution is dependent on the number of chirps processed together at once for one frame. Lastly, we also track the mobile node with the help of OptiTrack Motion capture system that collects the position and orientation of the mobile node in to provide a csv file for each experiment.