Patent ID: 8254856

Claim:
A method for processing defects in a radio frequency (RF) transmission subsystem from elements therein, the defects including at least one of a mismatch between two channels in phase quadrature in the RF transmission subsystem and a leaking transposition signal from a first frequency transposition stage of the RF transmission subsystem and having a first transposition frequency, the method comprising: calibration processing including estimating compensation parameters representative of the defects, the estimating comprising delivering, into the RF transmission subsystem upstream of the elements creating the defects, a reference signal having a reference frequency, obtaining, downstream of the first frequency transposition stage, a resultant reference signal, and obtaining, from the resultant reference signal, an approximate value for each compensation parameter, the obtaining of the approximate value comprising a downward auxiliary frequency transposing of the resultant reference signal with an auxiliary transposition frequency, being different from the first transposition frequency, to provide a transposed reference signal comprising a first frequency component representative of an echo of the reference signal and having a first frequency, and a second frequency component representative of an echo of the leaking transposition signal and having a second frequency; and compensating for the defects by at least injecting the approximate values into the RF transmission subsystem.