Pair-swap independent trellis decoder for a multi-pair...

Details Pair-swap independent trellis decoder for a multi-pair... Pair-swap independent trellis decoder for a multi-pair...

2005-03-08

2005-03-08

Chin, Stephen (Department: 2734)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S260000, C375S288000, C341S103000

Reexamination Certificate

active

06865234

ABSTRACT:
A method and a system for compensating for a permutation of L pairs of cable such that the compensation is localized in a trellis decoder of a receiver. The L pairs of cable correspond to L dimensions of a trellis code associated with the trellis decoder. The trellis code includes a plurality of code-subsets. The permutation of the L pairs of cable is determined. A plurality of sets of swap indicators based on the permutation of the L pairs of cable is generated. Each of the sets of swap indicators corresponds to one of the code-subsets. The code-subsets are remapped based on the corresponding sets of swap indicators.

REFERENCES:
patent: 5768301 (1998-06-01), Dreyer et al.
patent: 5881074 (1999-03-01), Rao
Hatamian et al (“Desing Considerations for Gigabit Ethernet 1000Base-T Twisted Pair Transceivers”, May 98, IEEE 1998 Custom Integrated Circuits Conference).*
IEEE Std 802.3ab-1999 (Supplement to IEEE Std 802.3, 1998 Edition), entitled Supplement to Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications—Physical Layer Parameters and Specifications for 1000 Mb/s Operation Over 4-Pair of Category 5 Balanced Copper Cabling, Type 1000Base-T.

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