Patent ID: 7071777

Claim:
A method for reducing memoryless and memory effects in the amplitude and the phase of an output signal of a power amplifier, the output signal obtained by predistorting an input signal to get a predistorted signal and passing the predistorted signal through the power amplifier, the method comprising: a. determining an amplitude memory signal using a memory-based AM/AM model and a memoryless AM/AM model, the amplitude memory signal representing the memory effects in the amplitude of the output signal; b. subtracting the amplitude memory signal from the input signal to get an amplitude memory-subtracted signal; c. performing memoryless amplitude predistortion on the amplitude memory-subtracted signal using a memoryless amplitude predistortion model to get an amplitude-predistorted signal, the memoryless amplitude predistortion being performed to reduce the memoryless effects in the amplitude of the output signal; and d. performing memory-based phase predistortion on the amplitude-predistorted signal using a memory-based phase predistortion model to get a phase predistorted signal, the memory-based phase predistortion being performed to reduce the memoryless and memory effects in the phase of the output signal.