Moving object detection system with internal Doppler-reference signal

摘要

A moving object detection system includes a transmitter, a receiver, a detector, an oscillation means, a switch and a controller. The oscillation means is configured to generate a first oscillation signal having a first frequency, and a check signal having a check frequency that is different from the first frequency. The switch is configured to supply the first oscillation signal or the check signal to the detector. The controller has a monitoring phase and a check phase and is configured: to supply the first oscillation signal to the transmitter through the switch at the monitoring phase; and also to supply the check signal to the detector through the switch at the check phase.