Joint viterbi decoder and decision feedback equalizer

Details Joint viterbi decoder and decision feedback equalizer Joint viterbi decoder and decision feedback equalizer

1997-09-24

1999-02-16

Ghebretinsae, Temesghen

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

375233, 371 434, 371 437, H04L 2706, H03D 100

Patent

active

058728171

ABSTRACT:
Decision feedback equalization is used in a communication system which employs coded modulation, such as trellis coded modulation. The transmitted stream of signal points includes first signal points that were generated using a particular coded modulation scheme interspersed with second signal points that were generated without the using of coding, and estimated intersymbol interference components for the second signal points are generated in response to tentative decisions as to the first signal points formed by the Viterbi decoder. Rather than forming immediate final decisions as to the second signal points, there is formed a tentative decision for each one of the second signal points associated with each Viterbi decoder state using an estimated intersymbol interference component provided from a decision feedback equalizer associated with that state. Each second-signal-point tentative decision is used to extend the surviving path for the associated state and to also update its path metric.

REFERENCES:
patent: 5056117 (1991-10-01), Gitlin et al.
patent: 5775855 (1998-05-01), Strolle et al.
patent: 5787127 (1998-07-01), Ono et al.
U.S. application No. 08/753,351 filed Nov. 25, 1996.
U.S. application No. 08/855829 filed May 12, 1997.
P.R. Chevillat et al., "Decoding of Trellis-Encoded Signals in the Presence of Intersymbol Interference and Noise," IEEE Transactions on Communications, vol. 37, No. 7, 669-676 (Jul. 1989).
M.V. Eyuboglu et al., "Reduced-State Sequence Estimation for Coded Modulation on Intersymbol Interference Channels," IEEE Journal on Selected Areas in Communications, vol. 7, No. 6, 989-995 (Aug. 1989).
A. Duel-Hallen et al., "Delayed Decision-Feedback Sequence Estimation, " IEEE Transactions on Communications, vol. 37, No. 5, 428-436 (May 1989).

Affiliated with

Also associated with

Rating

Joint viterbi decoder and decision feedback equalizer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Joint viterbi decoder and decision feedback equalizer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Joint viterbi decoder and decision feedback equalizer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2068653