Cartesian or polar loop or envelope elimination/restoration amplifier linearization with correction of timing errors between phase and amplitude components

摘要

The invention relates to a method of adjusting a radio frequency signal produced by radio frequency circuitry in response to receipt of phase and amplitude control signals from digital baseband circuitry which operates to convert digital data signals into such phase and amplitude control signals. The phase and amplitude control signals are adjusted in the digital baseband circuitry in order to compensate for time alignment errors which occur in the radio frequency circuitry. This may be used in polar loop or envelope elimination/restoration arrangements for the linearization of power amplifiers. The same idea may be used to correct errors between the I and Q components in Cartesian feedback amplifiers.