Patent ID: 6449303
Filing Date: 2002-09-10
Classification: H04B,H04L

Abstract:
A multi-carrier communication system, comprising:a plurality of separate carrier signal sources, each providing a stream of carrier symbols corresponding to one or more data channels; a plurality of filters equal to the number of separate carriers each providing a filtering operation based on a filter impulse response function; a peak reduction unit coupled between said plurality of carrier signal sources and said plurality of filters and receiving said carrier symbols from said plural carrier signal sources, the peak reduction unit including a plurality of filter predictors which provide predicted filtered outputs for each of said plurality of filters using filter coefficient values corresponding to samples of the filter impulse response function of each of said filters, a peak reduction algorithm circuit block for receiving the predicted filtered outputs and determining peak reduction values for each stream of carrier symbols, and a plurality of combiners combining the peak reduction values and carrier symbols and providing peak adjusted carrier symbols; a plurality of frequency offset circuits equal in number to the plurality of separate carrier signals; and a carrier combiner for combining the outputs from said plural frequency offset circuits to provide a multi-carrier output.