Systems and methods for self-calibration for wireless communication

摘要

A method for inductively coupled communication is described. The method includes applying a carrier signal at a carrier frequency to an antenna circuit. The antenna circuit includes an antenna and a matching network that resonate at a resonant frequency. The method also includes measuring a looped-back signal over a range of impedance values. The looped-back signal includes the carrier signal received by a receiver coupled to the antenna circuit. The method further includes setting a calibrated impedance as an impedance configuration that produces a resonance peak in the looped-back signal.

主权项

1. A method for inductively coupled communication, comprising:
applying a carrier signal at a carrier frequency to an antenna circuit, the antenna circuit comprising an antenna and a matching network that resonate at a resonant frequency; measuring a looped-back signal over a range of impedance values, the looped-back signal comprising the carrier signal received by a receiver coupled to the antenna circuit; setting a calibrated impedance as an impedance configuration that produces a resonance peak in the looped-back signal; determining an impedance offset based on a difference between a default impedance and the calibrated impedance, wherein the default impedance comprises a preconfigured matching network impedance associated with the carrier frequency; and applying the impedance offset to the matching network for an operation that uses a second carrier frequency that differs from the carrier frequency used to set the calibrated impedance.