Patent ID: 6192087
Filing Date: 2001-02-20
Classification: H04L

Abstract:
A method of spectrally shaping transmitted samples with a set of predetermined frequency characteristics and a predetermined set of allowable transmitted signal levels, wherein a transmitted sample is either of an unmodified source sample or a dependent sample, comprising the steps of:a) calculating, for each of the transmitted samples, a running measure of unwanted components up to the current sample;b) computing, for each block of the transmitted samples, an objective function based on the running measure calculated in Step a), wherein said objective function shapes the source samples to a predetermined spectrum characterized by a set of filter coefficients associated with a transmitter of said transmitted samples;c) selecting, for each block of the transmitted samples, at least one redundant sample to be added or at least one transmitted sample to be modified, at structured or randomized location within the block to optimize the objective function in Step b).