A SIMPLE AND EFFECTIVE PRECODING SCHEME FOR NOISE WHITENING ON INTERSYMBOL INTERFERENCE CHANNELS

A precoding scheme for noise whitening on intersymbol interference cha nnels is presented. This scheme is compatible with trellis-coded modul ation and unlike Tomlinson precoding allows constellation shaping. It can be used with almost any shaping scheme (including the optimal SVQ shaping) as opposed to trellis precoding which can only be used with t rellis shaping. The implementation complexity of this scheme is minima l-only three times that of the noise prediction filter, and hence effe ctive noise whitening can be achieved by using a high-order predictor.