Patent ID: 6625219
Filing Date: 2003-09-23
Classification: H04L

Abstract:
A method of arranging and transmitting data in a multitone modulation system having a plurality of tones, each tone at a different frequency and adapted to transmit a data symbol during a symbol period, comprising the following steps:inputting data comprising a plurality of data symbols; encoding a first portion of said data according to a first error correcting code to produce first encoded data; encoding a second portion of said data according to a second error correcting code to produce second encoded data; arranging said first encoded data according to time-wise columns, each of said time-wise columns corresponding substantially to a symbol period; arranging said second encoded data according to rows, wherein each row corresponds to one of said plurality of tones matching said first error correcting code, said second error correcting code, and said arranging steps to a type of noise the modulation is sensitive to; and utilizing said plurality of tones to transmit said first encoded data and said second encoded data.