Continuous Wave Doppler Radar Occupant Count Estimation Using Spectral Features

Building occupancy estimation is important for efficient building management, energy consumption control, and occupant safety and well-being. Radar-based occupancy sensors have a potential to provide an effective tool for building occupancy monitoring, without privacy concerns inherent to camera use. In this paper we propose an occupant count approach based on spectral features of continuous wave Doppler radar signals in the presence of multiple occupants. The proposed approach is tested using envelope-transient simulation for the case of ten occupants, and it is demonstrated that spectral features change proportionally to the number of occupants.