Apparatus and methods for phase synchronization of local oscillators in a transceiver

摘要

A method and apparatus for phase adjustment of a RF transceiver is disclosed. Based on a first local oscillator signal and a second local oscillator signal, a beat signal that indicates the frequency and phase relationship between the first and second local oscillator signals can be generated. Using the beat signal, changing phase relationship between the first and second local oscillator signals can be cumulatively taken account for using phase averaging to allow quick restoration to observation of a previously observed channel.

主权项

1. A method of transceiver calibration comprising:
generating a transmit local oscillator signal of a first frequency; generating an observation local oscillator signal of a second frequency different from the first frequency; generating a beat signal based on the transmit local oscillator signal and the observation local oscillator signal; generating a phase adjustment value based on the beat signal; and adjusting a digital modulator based on the phase adjustment value to achieve a desired phase relationship between the transmit local oscillator signal and the observation local oscillator signal.