Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Reexamination Certificate
2005-11-29
2005-11-29
Chin, Stephen (Department: 2634)
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
C714S792000, C714S794000, C714S795000, C375S262000, C375S341000, C704S242000
Reexamination Certificate
active
06970520
ABSTRACT:
Radiocommunication systems, methods and terminals are described wherein metrics associated with MLSE detecting techniques, e.g., using the Viterbi algorithm, are accumulated in a manner which is less computationally intensive than conventional techniques. The delta metrics associated with each state are partitioned into, for example, six different terms. These terms are then selectively accumulated in phases, before decisions, during decisions and after decisions, to reduce the total number of computations associated therewith. Additionally, certain symmetries associated with exemplary modulations are taken into account in order to further simplify processing and memory requirements of these detecting techniques.
REFERENCES:
patent: 4644564 (1987-02-01), Dolivo et al.
patent: 5164961 (1992-11-01), Gudmundson
patent: 5297169 (1994-03-01), Backström et al.
patent: 5375129 (1994-12-01), Cooper
patent: 5436928 (1995-07-01), Fukuawa et al.
patent: 5465276 (1995-11-01), Larsson et al.
patent: 5481572 (1996-01-01), Sköld et al.
patent: 5499272 (1996-03-01), Bottomley
patent: 5533067 (1996-07-01), Jamal et al.
patent: 5596607 (1997-01-01), Larsson et al.
patent: 5727032 (1998-03-01), Jamal et al.
patent: 5903610 (1999-05-01), Sköld et al.
patent: 5930298 (1999-07-01), Choi
patent: 6023492 (2000-02-01), Norman
patent: 6141388 (2000-10-01), Servais et al.
patent: 6192038 (2001-02-01), Wallerius et al.
patent: 6215827 (2001-04-01), Balachandran et al.
patent: 6272661 (2001-08-01), Yamaguchi
patent: 6278732 (2001-08-01), Beidas et al.
patent: 6452984 (2002-09-01), Banister et al.
patent: 6597743 (2003-07-01), Khayrallah et al.
patent: 6606728 (2003-08-01), Aziz
patent: 0 677 965 (1995-10-01), None
patent: 0 786 872 (1997-07-01), None
Adaptive Maximum-Likelihood Receiver for Carrier-Modulated Data-Transmission Systems Ungerboeck, G.; Communications, IEEE Transactions on [legacy, pre-1988], vol.:22, Issue: 5, May 1974 pp.: 624-636.
Performance of list Viterbi equalizers with metric-criteria combining Kubo, H.; Tanada, K.; Iwase, A.; Penther, B.; Miyake, M.; Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st, vol.: 3, May 15-18, 2000 pp.: 186.
Difference-metric Viterbi decoding of multilevel class-IV partial-response signals Olcer, S.; Underboeck, G.; Communications, IEEE Transactions on, vol.: 42, Issue: 234, Feb./Mar./Apr. 1994 pp. :1558-1570.
On the optimality of metrics for coarse frame synchronization in OFDM: a comparison Muller-Weinfurtner, S.H.; Personal, Indoor and Mobile Radio Communications, 1998. The Ninth IEEE International Symposium on, vol.:2, Sep. 8-11, 1998 pp.:533-537 v.
Falkenström Magnus
Lindbom Lars
LandOfFree
Methods and systems for accumulating metrics generated by a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods and systems for accumulating metrics generated by a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and systems for accumulating metrics generated by a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3493037