Patent ID: 6563841
Filing Date: 2003-05-13
Classification: H04L

Abstract:
An apparatus for receiving a discrete multi-tone (DMT) signal representative of a series of input symbols and including a plurality of orthogonal sinusoidal subchannels of finite length for each input symbol, the apparatus comprising:a plurality of delay circuits, each operable to receive the DMT signal and produce a delayed DMT signal; a plurality of windowing circuits, each operable to receive a respective one of the delayed DMT signals and produce a windowed DMT signal; at least one finite duration fast Fourier transform (FFT) circuit, operable to receive the windowed DMT signals and produce respective complex signals representing a plurality of bins corresponding to the subchannels of the DMT signal; a plurality of multiplier circuits, each operable to produce a product of (i) a complex factor for compensating for a respective-phase shift introduced by a corresponding one of the delay circuits, and (ii) a respective one of the complex signals; an equalizer circuit operable to receive the products from the plurality of multiplier circuits and produce a partial response signaling (PRS) coded signal; and a PRS decoder operable to receive the PRS coded signal and produce output symbols representative of the input symbols.