Methods for the determination of FEC parameters in DMT based...

Details Methods for the determination of FEC parameters in DMT based... Methods for the determination of FEC parameters in DMT based...

2005-10-12

2009-10-06

Lamarre, Guy J (Department: 2112)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S774000, C375S219000, C375S227000

Reexamination Certificate

active

07600178

ABSTRACT:
The present invention provides procedures for computing Forward Error Correction (FEC) parameters given a set of constraints on maximum interleaver memory, maximum interleaver depth, maximum codeword size, maximum number of check bytes, maximum number of FEC codewords per Discrete Multi-Tone (DMT) symbol, and minimum number of DMT symbols that the FEC must correct, as well as any constraints imposed by the interleaver. These procedures are implemented on a computational engine in a modem, enabling it to achieve optimal performance in all cases. In addition these procedures can be applied as part of any bit loading algorithm to determine the optimal FEC parameters, taking into account the Signal-to-Noise Ratio (SNR) profile, the FEC coding gain, the constraints of the framer, and any application specific constraints.

REFERENCES:
patent: 6480475 (2002-11-01), Modlin et al.
patent: 6801570 (2004-10-01), Yong
patent: 7409626 (2008-08-01), Schelstraete
patent: 2001/0048667 (2001-12-01), Hamdi
patent: 2008/0232444 (2008-09-01), Tzannes

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