Data communication system with adaptive precoding

Pulse or digital communications – Equalizers – Automatic

Reexamination Certificate

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C375S229000, C375S233000

Reexamination Certificate

active

06987803

ABSTRACT:
A receiver, for receiving a signal transmitted over a channel by a transmitter that includes a Tomlinson-Harashima precoder. The receiver includes a feed-forward equalizer (FFE), adapted to apply a feed-forward equalization function to the signal, so as to generate a sequence of equalized samples. A decision block is coupled to receive the equalized samples from the FFE and to generate a sequence of decision output samples responsive thereto, the decision block comprising an adaptive filter, having coefficients determined adaptively responsive to a characteristic of the channel. A Tomlinson-Harashima decoder is coupled to receive and decode the decision output samples so as to reconstruct the sequence of input symbols.

REFERENCES:
patent: 5513216 (1996-04-01), Gadot et al.
patent: 5604769 (1997-02-01), Wang
patent: 6167082 (2000-12-01), Ling et al.
patent: 6289047 (2001-09-01), Agazzi et al.
patent: 6792049 (2004-09-01), Bao et al.
patent: WO 01/50645 (2001-07-01), None
“Generalized square and hexagonal constellations for intersymbol-interference channels with generalized tomlinson-harashima precoders”, by Wei, Published in IEEE Trans. On Comm. 42:9 (Sep. 1994), pp. 2713-2721.

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