Patent ID: 7545869

Claim:
A method of reducing the peak-to-average power ratio of a multi-carrier signal in transmitter/receiver systems, the method comprising: providing a digital signal to be transmitted; subjecting the digital signal to be transmitted to a Fourier transform operation to obtain a modulated signal; generating an anti-peak signal comprising a pulse train through time, a shape of a base pulse of said pulse train being defined and known at a receiver; summing said anti-peak signal with said modulated signal in order to obtain a summed signal; and transmitting the summed signal and auxiliary information to enable demodulation of the summed signal as soon as the summed signal is received, wherein the step of summing said anti-peak signal with said modulated signal comprises summing said pulse train in phase opposition with respect to the original digital signal if the original signal exhibits peaks exceeding a certain value, and wherein the step of generating the anti-peak signal comprises generating a pulse train in which the base pulse has a Gaussian-type shape with a width at 3 dB comparable with a distance between samples of the original digital signal and an amplitude on an order of one half of a maximum amplitude of the original digital signal.