Doppler radar sensor with power detector
AssigneesSil Radar Technology Inc., National Cheng Kung University, NCKU Research and Development Foundation
InventorsHuey-Ru Chuang, Chien-Chang Chou, Wen-Chian Lai
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Abstract
A Doppler radar sensor with a power detector is disclosed. In the Doppler radar sensor, a power detector is provided to detect the power level of a received transmission signal, and a leakage and clutter canceler is provided to generate a cancellation signal according to the power level of the received transmission signal. The cancellation signal is used to cancel leakage and clutter in the received transmission signal such that object displacement in the received transmission signal can be identified.
Claims11
A Doppler radar sensor, comprising:
- a radar configured to radiate a wireless signal to an object and receive a reflected signal from the object and a clutter from a background where the object is placed, wherein a received transmission signal is formed from the reflected signal, the clutter and a leakage signal of the radar;
- a power detector coupled to the radar, the power detector is configured to detect a power level of the received transmission signal and output a detection signal according to the power level of the received transmission signal;
- and
- a leakage and clutter canceler coupled to the power detector, the leakage and clutter canceler is configured to receive the detection signal and generate a cancellation signal to the radar according to the detection signal, wherein the cancellation signal is configured to cancel the leakage signal and the clutter in the received transmission signal.
Dependencies are inferred from the claim text.