Patent ID: 7376200

Claim:
A digital baseband (DBB) transmitter comprising: an analog radio transmitter having real and imaginary signal inputs; a digital DC offset compensation module in communication with the analog radio transmitter and having real and imaginary signal inputs, the digital DC compensation module being configured to adjust the DC level of at least one of the real and imaginary signal inputs; a controller in communication with the digital DC offset compensation module, the controller being configured to determine at least one DC offset compensation value used to suppress carrier leakage occurring in the analog radio transmitter, wherein the controller provides at least one DC offset signal to at least one of the real and imaginary signal inputs having a level that corresponds to the at least one DC offset compensation value; a modem selectively connected to the real and imaginary signal inputs of the digital DC offset compensation module, the modem having real and imaginary signal outputs; and first and second switches respectively connected to the real and imaginary signal outputs of the modem, the real and imaginary signal inputs of the digital DC offset compensation module and the controller, wherein the at least one DC offset compensation value is determined after the switches disconnect the modem from the real and imaginary signal inputs of the digital DC offset compensation module and connect the controller to the real and imaginary signal inputs of the digital DC offset compensation module.