Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2008-03-31
2010-06-01
Vo, Don N (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S308000, C375S329000
Reexamination Certificate
active
07729410
ABSTRACT:
A system for and method of converting successive bits of digital data into BPSK symbols using one or more BPSK symbol constellations such that orthogonal BPSK constellations are referenced to successive bits of the digital data. The system and method may toggle between referencing first and second orthogonal constellations as successive bits of the digital data are encountered. Alternatively, the system and method may successively rotate by 90° the constellation to be referenced as successive bits of the digital data are encountered. The reversal of the systems and methods described can be used to decode a transmission made by the methods described or specifically to reference a succession of orthogonal BPSK constellations to convert a succession of BPSK symbols to a succession of bits of digital data. Furthermore, a standard quadrature receiver can be used to perform the conversion.
REFERENCES:
patent: 4817116 (1989-03-01), Akaiwa et al.
patent: 5103459 (1992-04-01), Gilhousen et al.
patent: 5416801 (1995-05-01), Chouly et al.
patent: 5621762 (1997-04-01), Miller et al.
patent: 5638404 (1997-06-01), Crozier
patent: 6031865 (2000-02-01), Whinnett et al.
patent: 6862321 (2005-03-01), Kaneko et al.
patent: 6865236 (2005-03-01), Terry
patent: 6934317 (2005-08-01), Dent
patent: 6940837 (2005-09-01), Kotake
patent: 7050768 (2006-05-01), Hosur et al.
patent: 7154961 (2006-12-01), Wengerter et al.
patent: 7254167 (2007-08-01), Lin et al.
patent: 7352797 (2008-04-01), Eidson
patent: 2003/0169830 (2003-09-01), Ruotsalainen et al.
patent: 2007/0082623 (2007-04-01), Mattheijssen et al.
Miller, S. L. and O'Dea, R.J., “Peak Power and Bandwidth Efficient Linear Modulation,” IEEE Transactions on Communications, vol. 46, No. 12, pp. 1639-1648, Dec. 1998.
Kashyap, K. et al., “Pi/2-Shift BPSK—A Modulation Scheme Robust to Nonlinear Amplification for CDMA Mobile Communications,” IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, vol. E80-A, No. 9, pp. 1634-1639, Sep. 1997.
Kashyap, K. et al., “The Performance of CDMA System Using Pi/4-Shift QPSK and Pi/2-Shift BPSK With the Nonlinearity of HPA,” IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, pp. 492-496, Oct. 15, 1996.
Fujita, et al., “Sony CFP Presentation,” IEEE P802.15 Working Group for Wireless Personal Area Networks, doc No. IEEE P802.15-03137r3, pp. 1-36, May 5, 2003.
Patenaude, F. et al., “A New Symbol Timing Tracking Algorithm for Pi/2-BPSK and Pi/4-QPSK Modulations,” IEEE Proceedings of the International Conference on Communications, vol. 4, pp. 1588-1592, Jun. 14, 1992.
Crozier, S.N., “Precompensated Frequency Modulation (PFM) Designed for Pi/4-Shifted QPSK Receivers,” 18th Biennial Symposium on Communication, pp. 343-346, Jun. 2, 1996.
NXP B.V.
Vo Don N
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