Noncontact Exercise Monitoring in Multi-Person Scenario With Frequency-Modulated Continuous-Wave Radar

Monitoring exercise activities is crucial for athletes to reach specific fitness goals. Portable radars are an emerging technology for noncontact exercise monitoring. However, the existing works only relies on the Doppler effect caused by one motion in the sensor's field of view, which is not practical in scenarios with multiple moving targets. In this paper, the feasibility of using FMCW radars to monitor exercises when multiple moving targets are illuminated by the same sensor is investigated. By using the range capability of FMCW radars, interference rejection is achieved. Experimental results demonstrate the effectiveness of the noncontact exercise monitoring based on FMCW radars in the presence of multiple interferences.