access icon openaccess Identifying the operation of a parked car's engine, transmission, and door using millimetre wave pulse Doppler radar

This Letter demonstrates the technical capability of millimetre wave pulse-Doppler radar to identify safety-critical operating status information for parked cars. A simple 94-GHz pulsed linear frequency modulated radar with stretch processing on receive provides range-selective detection of small-scale vibration along the length of a parked car. The resulting range-Doppler signature clearly differentiates whether the car's engine is running or not as well as whether the car's transmission is shifting between ‘park’ and ‘drive’. The rotational motion of an opening car door also produces a distinct signature in range-Doppler space. Incorporating this knowledge into future automotive sensors can alert oncoming vehicles to unanticipated actions of parked cars to avert potential damage or injury.

Inspec keywords: FM radar; radar signal processing; Doppler radar

Other keywords: millimetre wave pulse Doppler radar; parked car; range-Doppler space; opening car door; range-selective detection; safety-critical operating status information; millimetre wave pulse-Doppler radar; linear frequency modulated radar; park; resulting range-Doppler signature

Subjects: Signal processing and detection; Automobile industry; Radar equipment, systems and applications; Sensing devices and transducers; Radiowave propagation; Radar theory; Electromagnetic compatibility and interference; Signal detection

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