Apparatus and method for improving dynamic range in a receiver

摘要

Phase errors and gain errors are reduced in a receiver to increase the dynamic range of the receiver. An input signal is shifted to an intermediate frequency (IF) and divided into a first channel and a second channel. The first and second channels are multiplied by a complex intermediate frequency signal having a frequency equal to the negative of the IF and by the complex conjugate of the intermediate frequency signal to produce a complex normal signal and a complex conjugate signal. A gain correction factor and a phase correction factor are adjusted based on a correlation signal produced by multiplying the complex normal signal by the complex correlation signal.