Patent ID: 8369431
Filing Date: 2013-02-05
Classification: H04B,H04L

Abstract:
1. A method for peak-to-average power reduction in a hybrid signal comprising first and second separately modulated signals, the method comprising the steps of: obtaining a sample point of the hybrid signal; defining the sample point by way of a first vector corresponding to the first separately modulated signal and a second vector corresponding to the second separately modulated signal; adding the first vector to the second vector to obtain a hybrid vector; comparing the hybrid vector against a maximum desired peak threshold to identify peaks in power; determining an error vector that reduces the identified peaks in power of the hybrid vector to within the maximum desired peak threshold; adding the error vector to the second vector to reduce at least one peak in power of the identified peaks in power, and correcting a constellation and a spectrum of the second modulated signal following peak determination and peak reduction to yield a corrected second modulated signal, wherein said correcting of the constellation and spectrum comprises the steps of: