Michael Ray Locke

US Patent:

7190717, Mar 13, 2007

Filed:

Sep 22, 2005

Appl. No.:

11/233452

Inventors:

Channamallesh G. Hiremath - Plano TX, US
Udayan Dasgupta - Irving TX, US
Zigang Yang - Plano TX, US
Umashanker S. Iyer - Plano TX, US
Michael E. Locke - Santa Clara CA, US

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H04L 5/16

US Classification:

375222, 375316, 375341, 375365, 375260

Abstract:

A system and method for reordering tones of a DMT signal within a communication system is described. Cross tone correlated noise in a received signal is identified and rearranged such that tones with correlated noise are spread out throughout the received signal before being processed by a decoder such as, Viterbi decoder. In an embodiment, two tones with the most correlated noise are placed at each end of the sequence of tones presented to the Viterbi decoder. In some embodiment, the tones with correlated noise can be spread such that two adjacent tones with correlated noise have a minimum distance of at least three tones between them at the input to the Viterbi decoder. In other embodiment, tones in the received signal can be processed in various kinds of interleavers for reordering according to the interleaver scheme.