Method of and circuit for generating parameters for a predistortion circuit in an integrated circuit

A method of generating parameters for a predistortion circuit in an integrated circuit, the method comprising:

• receiving, at the predistortion circuit, an input signal to be amplified by a power amplifier;
• receiving an output of the power amplifier at an input of the integrated circuit;
• comparing an output of the predistortion circuit with the output of the power amplifier;
• determining a phase difference between the output of the predistortion circuit and the output of the power amplifier;
• generating an approximation of the phase difference;
• conforming the output of the power amplifier with the output of the predistortion circuit based upon the approximation of the phase difference by providing delay alignment between the output of the predistortion circuit and the output of the power amplifier, wherein providing delay alignment comprises comparing an edge of the output of the predistortion circuit to an edge of the output of the power amplifier;
• and
• generating parameters to be applied to the predistortion circuit based upon conformed outputs of the power amplifier and the predistortion circuit.

An integrated circuit having a circuit for generating parameters for a predistortion circuit of the integrated circuit, the circuit for generating parameters comprising:

• a predistortion circuit coupled to receive an input signal to be amplified by a power amplifier coupled to the integrated circuit;
• a signal correction circuit comprising an amplitude alignment circuit coupled to receive an output of the predistortion circuit and an output of the power amplifier, the signal correction circuit conforming the output of the power amplifier with the output of the predistortion circuit;
• and
• an estimation circuit coupled to receive the output of the signal correction circuit, the estimation circuit generating parameters for the predistortion circuit based upon the conformed outputs of the power amplifier and the predistortion circuit.