1results about How to "Solving Phase Blur Problems" patented technology

This invention discloses a passive RFID tilt detection method based on a transceiver separation architecture, comprising the following steps: acquiring a continuous wave radio frequency signal from an RF exciter; collecting a mixed signal containing a passive tag reflected wave and an RF exciter leakage wave, and simultaneously acquiring a self-interference reference signal; performing self-interference cancellation processing on the mixed signal based on the self-interference reference signal, and extracting the tag backscattered signal; when a dual-tag array is used, measuring the phase of the passive tag array separately and calculating the phase difference, calculating the initial tilt angle of the target object, and obtaining the final tilt angle after correction; when a single passive tag is used, extracting the phase data of the single passive tag and performing linear interpolation, and substituting the interpolated real-time phase into a linear model to calculate the tilt angle. This invention can effectively eliminate transceiver self-interference and automatically offset the influence of distance changes on angle measurement accuracy, significantly improving the robustness and accuracy of object tilt detection.