Patent ID: 7949324

Claim:
A method for compensating a transmission carrier leakage, the method comprising: detecting an I channel DC offset DCI 0 and a Q channel DC offset DCQ 0 generated by a reception carrier leakage from an output of a down-conversion mixer; detecting an I channel DC offset DCI and a Q channel DC offset DCQ from the output of the down-conversion mixer while varying a compensation parameter being inputted to an up-conversion mixer to select the compensation parameter reducing a combination signal from combining said I channel DC offsets (DCI 0 , DCI) and a Q channel DC offsets DCQ 0 , DCQ) when the input of the down-conversion mixer is receiving an output of the up-conversion mixer; and transmitting a sum of a transmission baseband signal including an information to be transmitted and the selected compensation parameter using the up-conversion mixer and an antenna to compensate for the transmission carrier leakage.