Correction of quadrature phase imbalance and gain imbalance using dual CORDIC architecture during receiver low frequency conversion

摘要

A first portion for receiving an analog radio signal, generating a digital intermediate frequency I channel sample and a Q channel sample from the received analog radio signal, and setting the I channel sample and the Q channel sample to a low frequency baseband frequency; A digital radio receiver having a second part to convert, wherein the second part comprises a first coordinate rotation digital computer (CORDIC) for performing a complex rotation of the I channel samples, and a complex rotation of the Q channel samples. A second coordinate rotation digital computer that performs a phase accumulator that provides an output signal representing a complex rotation made for each of the I channel samples and the Q channel samples, and in the second part The output signal of the phase accumulator is the first coordinate rotation digital computer Before being sent to one of said second coordinate rotation digital computer, discloses a digital radio receiver is modified by the phase offset signal.