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Design >> High-Speed I/O Design >> DFE Adaption with 1/0 training pattern
https://designers-guide.org/forum/YaBB.pl?num=1235967357

Message started by neoflash on Mar 1^st, 2009, 8:15pm

Title: DFE Adaption with 1/0 training pattern
Post by neoflash on Mar 1^st, 2009, 8:15pm

I have got a question about DFE (decision feedback equalizer) adaption with a repetitive pattern such as 10.

This recurssive pattern would make DFE has numerous combinations of stable status of coefficients of feedback taps. When real random bit pattern comes, the adaption has to restart again.

Is there any way to solve this issue? Any published paper address this concern?

Title: Re: DFE Adaption with 1/0 training pattern
Post by sugar on Mar 1^st, 2009, 11:23pm

I think at training mode, the adaptation should not be enabled.

During normal operation, say with random patterns, the adaptation loop
should be very slow to average possible bad patterns like 1010 pattern.

--River