ADAPTIVE NOISE-PREDICTIVE PARTIAL-RESPONSE EQUALIZATION FOR CHANNELS WITH SPECTRAL NULLS

摘要

The present application makes use of a novel adaptive noise-predictive parti al-response equalization scheme for channels (30) exhibiting spectral nulls and/or near nulls. The noise-predictive partial re sponse (PR) equalizer employed in the different embodime nts of the present invention consists of a linear PR equalizer (32) which shapes the channel response to a predetermined partial-respons e function, followed by a linear predictor. This scheme modifies the output se quence of said linear partial-response equalizer (32) by whitening the total distortion, i.e. by whitening the noise components and t he residual interference components at said linear PR eq ualizer output, thereby achieving the best possible signal-to-noise ratio (SNR) befo re detection.