Patent ID: 7881402
Filing Date: 2011-02-01
Classification: H04L

Abstract:
1. A method of compensating for one or more errors in a transmitter, wherein the transmitter includes a compensator circuit, a quadrature modulator and a feedback path, the method comprising: (a) supplying an orthogonal pair of tones as calibration signals to the compensator circuit; (b) adjusting a delay value of a delay unit in the feedback path in order to approximate the condition that a sum of a first phase lag corresponding to the delay value plus a second phase lag associated with one or more filters in the transmitter is an integer multiple of π; (c) generating an update for one or more parameters of the compensator circuit, wherein said generating includes: (d) supplying the updated one or more parameters to the compensator circuit; and (e) repeating (c) and (d) a number of times until a termination condition is achieved.