Pulse or digital communications – Receivers – Automatic frequency control
Reexamination Certificate
2007-12-12
2011-11-15
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Receivers
Automatic frequency control
C375S238000, C375S239000, C375S242000, C375S256000, C375S353000, C455S130000, C329S311000, C329S304000
Reexamination Certificate
active
08059766
ABSTRACT:
A communications device includes a signal input for receiving signals such as a binary phase shift keyed (BPSK) communications signal having a repeated preamble bit or symbol pattern. A modem processes the communications signal and includes a demodulator and processor that generates an initial frequency offset estimate and phase error estimate by processing a Fast Fourier Transform (FFT) that detects the repeated preamble pattern for a block of samples within the communications signal, correlates within a start of message correlator to search for a start of message sequence and correlates different phases of the repeated preamble pattern within training correlators for reducing false detections of the start of message. Radio circuitry is operative with the modem for processing communications data obtained from the communications signal.
REFERENCES:
patent: 5315562 (1994-05-01), Bradley et al.
patent: 5903654 (1999-05-01), Milton et al.
patent: 6529566 (2003-03-01), Carsello et al.
patent: 6560303 (2003-05-01), Fan et al.
patent: 6781446 (2004-08-01), Furman et al.
patent: 7620125 (2009-11-01), Chang et al.
patent: 7916799 (2011-03-01), Brink et al.
patent: 2004/0218703 (2004-11-01), Kruger et al.
patent: 2006/0093076 (2006-05-01), Lee et al.
patent: 2007/0140212 (2007-06-01), Gaikwad et al.
patent: 2007/0147225 (2007-06-01), Yu et al.
patent: 2007/0195914 (2007-08-01), Chang et al.
patent: 2007/0280098 (2007-12-01), Bhatt et al.
patent: 2008/0043886 (2008-02-01), Inagawa et al.
patent: 2008/0137768 (2008-06-01), Park et al.
Furman William N.
Nieto John W.
Tyler William L.
Allen Dyer Doppelt Milbrath & Gilchrist, P.A.
Harris Corporation
Liu Shuwang
McKie Gina
LandOfFree
Communications device and related method with reduced false... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Communications device and related method with reduced false..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Communications device and related method with reduced false... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4304197