Method and apparatus for modulation using an at least...

Details Method and apparatus for modulation using an at least... Method and apparatus for modulation using an at least...

2007-06-12

2007-06-12

Kim, Kevin (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Amplitude modulation

C375S271000, C375S300000, C375S302000, C375S259000, C370S206000, C370S207000, C370S482000

Reexamination Certificate

active

10092358

ABSTRACT:
A digital communication system (20) in which a signal constellation (30) of a dimensionality of at least four is used, with distance properties chosen to reduce the bit error rate compared to that of digital communication systems using signal constellations of half the dimensionality. A symbol generator (21) uses the higher dimensional signal constellation (30), or any orthogonal transformation of the higher dimensional signal constellation (30), to translate a bit stream into a stream of higher dimensional symbols, which it then provides to a modulator (22). The modulator (22) transmits each higher dimensional symbol in at least two parts, using a modulation scheme according to the prior art, such as QAM or QPSK.

REFERENCES:
patent: 4358853 (1982-11-01), Qureshi
patent: 4761784 (1988-08-01), Srinivasagopalan et al.
patent: 5105442 (1992-04-01), Wei
Hai Geun Kim, “4-Dimensional Modulation for a bandlimited channel using QΛ2PSK” 1999 IEEE Wireless Communications and Networking Conference, Sep. 21-24, 1999, vol. 3, pp. 1144-1147.
Boutros et al, “Signal Space Diversity: A Power and Bandwith Efficient Diversity Technique for the Rayleigh Fading Channel”, Jul. 1998, IEEE Transactions on Information Theory, vol. 44, No. 4.
Rappaport, Theodore S., Wireless Communication, Copyright 2002,1996, Prentice Hall PTR, Second Edition, pp. 325-328.
Boutros et al, “Signal Space Diversity: A Power and Bandwidth Efficient Diversity Technique for the Rayleigh Fading Channel”, Jul. 1998, IEEE Transactions on Information Theory, vol. 44, No. 4.
Langton, Charan, “All About Modulation”, Copyright 2002, www.complextoreal.com, pp. 1,40-42,48.
Nonlinear Rotationally Invariant Trellis Codes for Multidimensional Modulation; Tingfang Ji, Ping An, Member, IEEE, and Subhash C. Kwatra, Senior Member, IEEE; IEEE Transactions on Communications, vol. 45, No. 10; Oct. 1997.
Applicability of four-dimensional modulations to digital satellites: A simulation study; Giorgio Taricco, Ezio, Biglieri, Valentino Castellani, Dipartimento di Elettronica, Politecnico, Corsa Duca degli Abruzzi 24, 1-10129 Torino, Italy; p. 28-32.
Multidimensional Constellations-Part I: Introduction, Figures of Merit, and Generalized Cross Constellations; G. David Forney, Jr., Fellow, IEEE, and Lee-Fang Wei; IEEE Journal on Selected Areas in Communications, vol. 7, No. 6; Aug. 1989. p. 877-892.

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