Patent ID: 7965988

Claim:
A method for off-line calibration of a radio frequency (RF) communication system, the method comprising steps of: enabling an off-line calibration mode for a radio frequency (RF) communication system; generating an off-line calibration signal; applying to a frequency converter a first off-line calibration signal corresponding to the generated off-line calibration signal; translating the first off-line calibration signal into a second off-line calibration signal, wherein the second off-line calibration signal comprises a frequency-translated version of the first off-line calibration signal; detecting a calibration signal corresponding to the second off-line calibration signal; evaluating one or more calibration adjustment signals associated with the calibration signal to reduce error in the communication system, the one or more calibration adjustment signals comprising an offset parameter associated with DC offset and an imbalance parameter associated with at least one of gain and phase imbalances; storing one or more calibration adjustment signals; disabling the off-line calibration mode; applying a communication signal; adjusting the communication signal based on the stored one or more calibration adjustment signals; enabling an off-line receive calibration mode for the RF communication system; generating an off-line receive calibration signal; applying to a receive channel frequency converter a first off-line receive calibration signal corresponding to the generated off-line receive calibration signal; translating the first off-line receive calibration signal into a second off-line receive calibration signal, wherein the second off-line receive calibration signal comprises a frequency-translated version of the first off-line receive calibration signal; receiving a receive calibration signal corresponding to the second off-line receive calibration signal; evaluating one or more receive calibration adjustment signals associated with the receive calibration signal to reduce error in the communication system; storing one or more receive calibration adjustment signals; and disabling the off-line receive calibration mode, wherein the off-line calibration mode is an off-line transmit calibration mode, the off-line calibration signal is an off-line transmit calibration signal, the communication signal is a transmit communication signal.