Patent ID: 6757299
Filing Date: 2004-06-29
Classification: H04L

Abstract:
In a multi-carrier transmission system, a method of reducing peak power of a signal to be transmitted while minimizing coding errors introduced into the signal to be transmitted, comprising the steps of:identifying a largest peak in magnitude occurring in a frame of the signal to be transmitted in the multi-carrier transmission system; determining a subcarrier frequency that has a maximum effect on the identified peak wherein for each subcarrier in the signal to be transmitted determining an effect E on the peak wherein for a complex input signal Xi+jYi, the effect E of an ith subcarrier is given by Ei=Xi*cos((2*&pgr;*L*i)/(M))âˆ’Yi*sin((2*&pgr;*L*i)/(M)), where L is a location of the peak and M is a sampling rate; determining the subcarrier having a maximum value of E; and applying a phase correction to the subcarrier frequency having the maximum effect on the identified peak to reduce the effect of the subcarrier on the identified peak.