%0 Journal Article
%T Turbo-per-Tone Equalization for ADSL Systems
%A Vanhaute Hilde
%A Moonen Marc
%J EURASIP Journal on Advances in Signal Processing
%D 2005
%I Springer
%X We study the equalization procedure in discrete multitone (DMT)-based systems, in particular, in DMT-based ADSL systems. Traditionally, equalization is performed in the time domain by means of a channel shortening filter. Shifting the equalization operations to the frequency domain, as is done in per-tone equalization, increases the achieved bitrate by 5¨C10%. We show that the application of the turbo principle to per-tone equalization can provide significant additional gains. In the proposed receiver structure, referred to as a "turbo-per-tone equalization" structure, equalization and decoding are performed in an iterative fashion. Equalization is done by means of a linear minimum mean squared error (MMSE) equalizer, using a priori information. We give a description of an efficient implementation of such an equalizer in the per-tone structure. Simulations show that we obtain a bitrate increase of 12¨C16% compared to the original per-tone equalization-based receiver structure.
%K ADSL
%K multicarrier modulation
%K turbo equalization
%U http://dx.doi.org/10.1155/ASP.2005.852