Patent ID: 7349489

Claim:
A method for reducing intersymbol interference in a telecommunications system, comprising: specifying an initial shaping filter, said initial shaping filter being specified by performing a convolution on a signal associated with a given filter, having certain spectral and time domain characteristics, with a signal associated with a matched complex counterpart of said given filter, determining a level of intersymbol interference of a final shaping filter where said final shaping filter is obtained by processing signals associated with said initial shaping filter, said determining including generating a white noise data sequence and using said white noise data sequence in a model of channel noise and intersymbol interference; updating final shaping filter coefficients at optimal sampling pints other than every sample iteratively until the intersymbol interference is at or below a desired level, said optimal sampling points being at a sampling period; and configuring a transmit filter of a radio frequency communications system with said final shaping filter coefficients.