Patent ID: 6721373
Filing Date: 2004-04-13
Classification: H04L

Abstract:
A multi-tone receiver which receives an input data block, comprising:a decoder for decoding the input data block operable in one of two modes, a first mode without erasures for producing a first decoded data block and a second mode with erasures for producing a second decoded data block, said decoder generating a decoding-failure indicator when a decoding failure is detected; a constellation decoder for generating erasure bits operative to obtain a sum of additive inverses of detector errors of at least two tones in a multi-tone symbol of said input block of data, compare the sum to a decoding failure threshold, and tag bytes of associated multi-tone symbols with an erasure bit, when the sum is less than the threshold; and a controller for initiating said decoder to receive said input block of data; activating said decoder to operate in at least one of the first mode and the second mode based on the decoding-failure indicator reported by said decoder; and selecting as an output from said decoder one of the first and second decoded data block output based on the decoding-failure indicator reported by said decoder.