Devices of iq mismatch calibration, and methods thereof

Abstract

A device with IQ mismatch compensation, having a transmitter oscillator, for providing an oscillator signal, a transmitter module, for up-converting a transmitter signal with the oscillator signal to generate an RF signal, and a loop-back module, for down-converting the RF signal with the oscillator signal to determine a transmitter IQ mismatch parameter, wherein effects of IQ mismatch of the loop-back module are calibrated by inputting a test signal and the oscillator signal before the down-converting of the RF signal. The transmitter module is arranged to reduce effects of IQ mismatch of a transmitter path in the transmitter module according to the determined transmitter IQ mismatch parameter.

What is claimed is: 
     
         1 . A device with IQ mismatch compensation, comprising:
 a transmitter oscillator, for providing an oscillator signal;   a transmitter module, for up-converting a transmitter signal with the oscillator signal to generate an RF signal; and   a loop-back module, for down-converting the RF signal with the oscillator signal to determine a transmitter IQ mismatch parameter, wherein effects of IQ mismatch of the loop-back module are calibrated by inputting a test signal and the oscillator signal before the down-converting of the RF signal; and   wherein the transmitter module is arranged to reduce effects of IQ mismatch of a transmitter path in the transmitter module according to the determined transmitter IQ mismatch parameter.