Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Patent
1997-10-22
2000-06-27
Pham, Chi H.
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
375262, 714795, H03D 100, H04L 2706
Patent
active
060815620
ABSTRACT:
A method of design and an implementation system for reduced-state Viterbi detectors for intersymbol interference channels are provided. The method uses a complement states grouping technique that comprises the steps of finding the state distances between complement states; forming the reduced-state trellis by grouping the complement states with state distance no less than the minimum free distance; and by keeping the complement states with state distance less than minimum free distance unchanged. The resultant reduced-state Viterbi detector has negligible performance loss compared to the full-state Viterbi detector while the complexity is reduced by a factor of about two.
REFERENCES:
patent: 5031195 (1991-07-01), Chevillat et al.
patent: 5291499 (1994-03-01), Behrens et al.
patent: 5537444 (1996-07-01), Nill et al.
patent: 5761212 (1998-06-01), Foland, Jr. et al.
Trellis Coding for Partial-Response Channels, Jack K. Wolf and Gottfried Ungerboeck, IEEE Transactions, vol. Com.-34, No. 8, Aug. 1986, pp. 765-773.
Coset Codes for Partial Response Channels; or, Coset Codes with Spectral Nulls, G. David Forney, Jr., IEEE Transactions on Information Theory, vol. 35, No. 5, Sep. 1989, pp. 925-943.
A Modified Trellis Coding Technique for Partial Response Channels, Reinhold Haeb, IEEE Transactions on Communications, vol. 40, No. 3, Mar. 1992, pp. 513-520.
Improved Coding Techniques for Precoded Partial-Response Channels; Kjell J. Hole and Oyvind Ytrehus; IEEE Transactions on Information Theory, vol. 40, No. 2, Mar. 1994, pp. 482-493.
Proceeding: Global Telecom Conference 1995, Naoya Kobayashi, Wataru Sakurai and Seiichi Mita, Source pp. 564-570.
Reduced-State Sequence Estimation with Set Partitioning and Decision Feedback, M. Vedat Eyuboglu and Shahid U.H. Qureshi, IEEE Transactions on Communications, vol. 36, No. 1, Jan. 1988, pp. 13-20.
Reduced-Complexity Viterbi Detector Architectures For Partial Response Signaling, Gerhard Fettweis, Razmik Karabed, Paul H. Siegel and Hemant K. Thapar, pp. 559-563.
Cruz Joao R.
He Runsheng
Corrielus Jean B
Hitachi , Ltd.
Pham Chi H.
LandOfFree
Implementing reduced-state viterbi detectors does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Implementing reduced-state viterbi detectors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Implementing reduced-state viterbi detectors will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1790332