A Nyquist-rate adaptation algorithm for fractionally spaced equalizers

Describes a time-domain Nyquist-rate algorithm that broadens the utility of fractional equalizers by permitting least-mean-square or true zero-forcing adaptation, more rapid convergence relative to synchronous coefficient updating, user specification of the end-to-end Nyquist channel, and elimination of the coefficient drift phenomenon. The investigation includes an analytical description of the algorithm, a functional circuit architecture, and reference to a computer simulation illustrating stable equalizer operation in the presence of dispersion on a digital subscriber loop