Patent ID: 8050352

Claim:
A method of reducing the peak-to-RMS (Root Mean Square) amplitude ratio of an amplitude modulation signal in a polar modulation transmitter, comprising: receiving in-phase (I) and quadrature phase (Q) signals; determining times or time intervals in which amplitudes represented in the I and Q signals exceed a quadrature domain maximum amplitude threshold; combining quadrature domain amplitude correction pulses with said I and Q signals to remove amplitude events determined to exceed said quadrature domain maximum amplitude threshold, thereby producing modified I and Q signals having reduced peak-to-RMS amplitude ratios; converting the modified I and Q signals to polar-coordinate amplitude and angle modulation signals; determining times or time intervals in which the amplitude represented in said amplitude modulation signal exceeds a polar domain maximum amplitude threshold; combining polar domain amplitude correction pulses with said amplitude modulation signal to reduce the amplitude of the amplitude modulation signal during times or time intervals the amplitude represented in said amplitude modulation signal is determined to exceed said polar domain maximum amplitude threshold, thereby producing a modified amplitude modulation signal; generating a modified amplitude modulated power supply signal from said modified amplitude modulation signal and an angle modulated carrier signal from said angle modulation signal; and amplifying the angle modulated carrier signal according to amplitude variations in said modified amplitude modulated power supply signal.