Patent ID: 7062233

Claim:
A method for defining correction parameters used in transmitter linearization executed by a predistortion method, the method comprising the following steps: (a) taking a plurality of samples at a time from a signal coming out of said transmitter, (b) categorizing the plurality of signal samples into classes, (c) comparing the plurality of signal samples with corresponding ideal signal values and (d) defining a correction parameter for each class on the basis of an average comparison result of all signal samples of the class in question, wherein said steps (c) and (d) comprise the following steps for each class; comparing the normalized amplitude and phase of each signal sample of the class in question with the normalized amplitude and phase of the signal fed into the transmitter and corresponding to the sample respectively, defining the ratios of the amplitude values and differences of the phase values calculating the average of the ratios of the amplitude values defined and the average of the phase value differences and defining the correction parameter for the class in question on the basis of the calculated averages.