A fast clutter cancellation technique using a generator in the radar receiver successfully eliminated time-varying dc offset at baseband, improving the robustness of noncontact vital signal detection.
A fast clutter cancellation technique for quadrature Doppler radar improves noncontact vital signal detection by eliminating time-varying dc offset.
A fast clutter cancellation technique is proposed for quadrature Doppler radar to robustly detect the vital signals when clutters enter the test environment. The dc offset at baseband varies with the change of test environment, dramatically reducing the accuracy of vital signal detection. To solve this problem, a clutter cancellation generator is employed in the radar receiver. Based on the detected dc offset values in I and Q channels, the generator produces an output signal, anti-phase to the received clutter signal, such that the clutter signal is cancelled at RF frontend. Therefore the time-varying dc offset at baseband is eliminated. The clutter cancellation method is described and the experiment was conducted to demonstrate the proposed method.
Chin et al. (Sat,) conducted a other in vital signal detection. fast clutter cancellation technique was evaluated on dc offset elimination and vital signal detection accuracy. A fast clutter cancellation technique using a generator in the radar receiver successfully eliminated time-varying dc offset at baseband, improving the robustness of noncontact vital signal detection.