Pulse or digital communications – Synchronizers – Frequency or phase control using synchronizing signal
Reexamination Certificate
2004-09-30
2009-11-10
Torres, Juan A (Department: 2611)
Pulse or digital communications
Synchronizers
Frequency or phase control using synchronizing signal
C375S354000
Reexamination Certificate
active
07616724
ABSTRACT:
A method and apparatus for frame synchronization in digital communication systems using multiple modulation formats perform a search for a differential frame alignment sequence (FAS) to frame-align the received digital stream and determine the polarity of the stream. Embodiments of the invention are compatible with Differential Phase Shift Keying (DPSK), Duobinary Signaling (DBS), and ON/OFF Keying (OOK) modulation formats.
REFERENCES:
patent: 4247936 (1981-01-01), Hustig
patent: 4335446 (1982-06-01), Gandini et al.
patent: 4494239 (1985-01-01), Martin
patent: 4651319 (1987-03-01), Bowlds
patent: 4768188 (1988-08-01), Barnhart et al.
patent: 5151925 (1992-09-01), Gelin et al.
patent: 5185736 (1993-02-01), Tyrrell et al.
patent: 5220448 (1993-06-01), Vogel et al.
patent: 5265105 (1993-11-01), Iwane
patent: 5276709 (1994-01-01), Kazawa et al.
patent: 5285458 (1994-02-01), Yoshida
patent: 6148045 (2000-11-01), Taura et al.
patent: 6172993 (2001-01-01), Kim et al.
patent: 6275537 (2001-08-01), Lee
patent: 7039132 (2006-05-01), Chen et al.
patent: 2005/0008089 (2005-01-01), Bothe et al.
patent: 2006/0020433 (2006-01-01), Taha et al.
Muller-Weinfurtner, “Frequency-domain frame synchronization for optimum frequency-differential demodulation of ODFM”, Global Telecommunications Conference, 1999, GLOBECOM '99 vol. 1B, 1999 pp. 857-862 vol. 1b.
Habuchi, “A synchronization system with differential detector for the SS-CSC system”, The 8th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, 1997, ‘Waves of the Year 2000’, PIMRC '97, vol. 3, Sep. 1-4, 1997 pp. 835-839 vol. 3.
Robertson, “Optimum frame synchronization of preamble-less packets surrounded by noise with coherent and differentially coherent demodulation”, IEEE International Conference on Communications, 1994, ICC 94, SUPERCOMM/ICC '94, Conference Record, Serving Humanity Through Communications, May 1-5, 1994 pp. 874-879 vol. 2.
Ballester Raul Benet
De Lind Van Wijngaarden Adriaan J.
Dohmen Ralf
Alcatel-Lucent USA Inc.
Torres Juan A
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