DOI: 10.1109/TMTT.2025.3580167   IEEEXplore: https://ieeexplore.ieee.org/document/11074325

Automotive in-cabin radar applications and systems review.

24 GHz (Doppler), 60 GHz FMCW, 3-10 GHz (UWB)

A comprehensive overview of automotive in-cabin radar sensing applications is presented with system approaches identified for best sensing outcomes by application, and with limitations noted for many applications that might be only marginally served by certain system approaches.

Automotive cabin radar systems for child presence detection, seatbelt reminder, intrusion detection, out-of-position detection for smart airbags, vital signs and drowsiness detection.

Typically 60 cm range resolution, 58° angular resolution for 24 GHz systems primarily for 1D sensing. Typically 3-7.5 cm range resolution, 7°-38° angular resolution, 5 GHz bandwidth for 60 GHz FMCW systems. Typically 6-30 cm range resolution, 58° angular resolution, 500 MHz -2 GHz bandwidth for UWB systems.