Patent ID: 6298096
Filing Date: 2001-10-02
Classification: H03C,H03D,H03F,H04L

Abstract:
A method of determining a set of predistortion parameters for use with a quadrature modulator comprising the steps of:(a) applying a sinusoidal wave to said quadrature modulator at a frequency f.sub.cal ;(b) collecting a first series of sets of samples reflecting changes to the value of a first set of predistortion parameters;(c) identifying a first series of energy values output by said quadrature modulator at said frequency f.sub.cal and the frequency 2*f.sub.cal, each of said series of energy values corresponding to one of said sets of samples; and(d) determining a subsequent value of said first set of predistortion parameters based upon a quadratic relationship between the value of said first set of predistortion parameters and said first series of energy values.