Patent ID: 7983630

Claim:
A digital Intermediate Frequency (IF) wireless transmitter, comprising: an IF up-converting unit up-converting a baseband I signal and a baseband Q signal on the basis of a first IF; a first operating unit subtracting the first IF-up-converted I signal from the first IF-up-converted Q signal; a D/A converting unit analog converting an output signal of the first operating unit; an IF modulating unit separating the same first and second signals from the output signal of the D/A converting unit, and modulating the first and the second signals on the basis of a second IF; a high-pass filtering unit passing a single sideband of the modulated first signal; a miss-matching correcting unit correcting an error of the modulated second signal; a second operating unit subtracting an output signal of the high-pass filtering unit from an output signal of the miss-matching correcting unit; a feedback unit receiving a feedback signal output from the second operating unit, detecting an error of the feedback signal, and providing the detected error to the miss-matching correcting unit; and a Radio Frequency (RF) up-converting unit up-converting the output signal of the second operating unit on the basis of an RF.