Method and system for data transmission with decreased bit...

Pulse or digital communications – Transmitters

Reexamination Certificate

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C327S291000, C332S106000, C341S020000, C341S123000

Reexamination Certificate

active

07729441

ABSTRACT:
A method for generating a modulated carrier signal with reduced bit error rates based on a plurality of data symbols. A plurality of data symbols are received, and a digital input signal is generated based on the plurality of data symbols. The digital input signal are filtered to produce a digital output signal including a phase characteristic. The phase characteristic of the digital output signal remains close to the desired symbol phase for substantial portion of the symbol period. A carrier signal is modulated using the digital output signal to produce the modulated carrier signal.

REFERENCES:
patent: 5177455 (1993-01-01), Bennett
patent: 5541953 (1996-07-01), Hiben et al.
patent: 6628728 (2003-09-01), McCarty, Jr.
patent: 7027498 (2006-04-01), McCarty, Jr.
patent: 2003/0185313 (2003-10-01), Beaulieu
patent: 2003/0215031 (2003-11-01), Schaumont et al.
patent: 2005/0078767 (2005-04-01), Liu
patent: 2009/0110033 (2009-04-01), Shattil
patent: 1 659 748 (2006-05-01), None
Ohno, “Postdetection diversity reception of QDPSK signals under frequency selective Rayleigh fading”, 1990 IEEE 40th Vehicular Technology Conference, May 6-9, 1990 pp. 431-436.
Yamada, “High-speed optical pulse transmission at 1.29-μm wavelength using low-loss single-mode fibers” IEEE Journal of Quantum Electronics, Publication Date: Nov. 1978, vol. 14, Issue: 11 On pp. 791-800 ISSN: 0018-9197.
Choi, “Compens1ating frequency drift in DPSK systems via baseband signal processing”, IEEE Transactions on Communications, Publication Date: Aug. 1997 vol. 45, Issue: 8 On pp. 921-924 ISSN: 0090-6778.
Gunther, “DOQPSK-differential demodulation of filtered offset QPSK”, 1994 IEEE 44th Vehicular Technology Conference, Jun. 8-10, 1994 pp. 1542-1546 vol. 3.
Kwon, “Improved zero-crossing demodulator for minimum shift keying under static environments”, Global Telecommunications Conference, 1995, Globecom '95, IEEE vol. 2, Nov. 13-17, 1995 pp. 1024-1028 vol. 2.
Sandeep Chennakeshu et al. “Differential Detection of π/4-Shifted-DQPSK for Digital Cellular Radio”, IEEE Transactions on Vehicular Technology, vol. 42, No. 1, Feb. 1993.
Steve Kuh et al. “Continuous Phase Quandrature Phase Shift Keyed (CPQPSK) Signaling Technique”, IEEE 1988, pp. 0157-0161.
Theodore S. Rappaport “Wireless Communications Principles & Practices”, Linear Modulation Techniques, Prentice-Hall, 1996, pp. 249-252.
William C. Jakes, “Microwave Mobile Communications”, The Institute of Electrical and Electronics Engineers, Inc., pp. 220-223, Copyright 1974 IEEE Press, Piscataway, NJ.
APCO Project 25 Common Air Interface Draft Document dated Jul. 26, 1993, 38 pages.
APCO Project 25 Digital Transceiver Performance Requirements Draft (TR 8.6194/01/0035); Jan. 1994, 52 pages.
International Search Report, International Application No. PCT/US2007/017203, International Filing Date Feb. 8, 2007.
Gentile K: “The Care and Feeding of Digital, Pulse-Shaping Filters” RF Design,Primedia Business Magazines & Media, vol. 25 No. 4, Apr. 1, 2002, pp. 50,52,54,56,58,61.
TIA/EIA Standard: “Project 25 FDIMA Common Air Interface New Technology Standards Project Digital Radio Technical Standards” May 1998, pp. 1-87.

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