Patent ID: 8010064

Claim:
A calibration method, comprising: obtaining one or more radio frequency (RF) test signals at an output of a transmitter, wherein the one or more RF test signals are based upon IQ baseband test signals; applying an envelope detector to the one or more test signals to obtain one or more characteristic signals from the one or more RF test signals, wherein the one or more characteristic signals include one or more first harmonic components and one or more second harmonic components associated with the one or more RF test signals; analyzing, by a digital signal processor, the one or more second harmonic components to determine IQ mismatch compensation parameters, wherein the IQ mismatch compensation parameters include at least a gain mismatch compensation parameter and a phase mismatch compensation parameter; analyzing, by the digital signal processor, the one or more first harmonic components to determine carrier leakage or DC offset compensation parameters, including at least a first carrier leakage or DC offset compensation parameter and a second carrier leakage or DC offset compensation parameter; and applying, by a compensator, at least a compensation factor to an I- or Q-signal to generate a respective I- or Q-compensated signal, wherein the compensation factor is determined based upon: multiplying the first carrier leakage or DC offset compensation parameter with a value derived from both the gain mismatch compensation value and the phase mismatch compensation value to generate a multiplied value, and adding the multiplied value with the second carrier leakage or DC offset compensation parameter to generate the compensation factor.