Pulse or digital communications – Repeaters – Testing
Patent
1993-03-11
1994-07-12
Cain, David C.
Pulse or digital communications
Repeaters
Testing
H04K 100
Patent
active
053295471
ABSTRACT:
A method and apparatus is provided for encoding and decoding to facilitate coherent communication. In encoding, reference symbols are inserted into a stream of input data symbols to form a reference coded stream of input data symbols. Subsequently, the reference coded stream of input data symbols are prepared for transmission over a communication channel by spreading the reference coded stream of input data symbols with a spreading code prior to transmission over the communication channel. In decoding, a received communication signal is despread with a spreading code to derive a stream of reference samples and a stream of data samples. The channel response is estimated by utilizing the stream of reference samples. Finally, an estimated data symbol is detected from the stream of data samples by utilizing the estimated channel response.
REFERENCES:
patent: 509204 (1992-03-01), Wheatley, III
patent: 4559633 (1985-12-01), Kan et al.
patent: 4730340 (1988-03-01), Frazier
patent: 4811357 (1989-03-01), Betts et al.
patent: 4901307 (1990-02-01), Gilhousen et al.
patent: 5029184 (1991-07-01), Andren et al.
patent: 5056109 (1991-10-01), Gilhousen et al.
patent: 5101501 (1992-03-01), Gilhousen et al.
patent: 5103459 (1992-04-01), Gilhousen et al.
patent: 5107225 (1992-04-01), Wheatley, III
patent: 5109390 (1992-04-01), Gilhousen et al.
patent: 5181225 (1993-01-01), Neeser et al.
patent: 5214669 (1993-05-01), Zarembowitch
Sklar, Bernard, Digital Communications: Fundamentals and Applications, Prentice Hall, Englewood Cliffs, N.J., 1988, Chapters 5 & 6 pp. 245-380 (1988).
Dixon, Robert C., Spread Spectrum Systems 2nd Ed., John Wiley & Sons, New York, N.Y., 1984 Chapters 1 & 2, pp. 1-55 (1984).
"On the System Design Aspects of Code Division Multiple Access (CDMA) Applied to Digital Cellular and Personal Communications Networks", A. Salmasi and K. S. Gilhousen, Proc. of 41st Vehicular Technology Conference in St. Louis, Mo., May 19-22, 1991, pp. 57-62.
"The Weight Spectra of Some Short Low-Rate Convolutional Codes", Jean Conan, IEEE Transactions on Communications, vol. COM-32, No. 9 (Sep. 1984), pp. 1050-1053.
"Performance of Convolutional Codes with Interleaving in the Interference Limited Rayleigh Fading Channel", Li Fung Chang and Sirikiat Ariyavisitakul, Proceedings of 41st Vehicular Technology Conference in St. Louis, Missouri, May 19-22, 1991, pp. 812-816.
K. S. Gilhousen, et al., "On the Capacity of a Cellular CDMA Sysetm," IEEE Trans. on VT, vol. 40, No. 2, pp. 303-311, May 1991.
F. Ling and D. Falconer, "Orthogonal/Convolutional Coding for Reverse Channel CDMA Communication," Proc. of VTC'92, pp. 63-66, May, 1992, Denver, Colo.
L. F. Chang and N. R. Sollenberger, "Comparison of Two Interleaving Techniques for CDMA Radio Communication Systems," Proc. of VTC'92, pp. 275-278, May, 1992, Denver, Colo.
Y. J. Liu, "Soft Decision Decoding for a Bit-Interleaved Convolutionally Encoded Code Division Multiple Access Sysetm over Rayleigh Fading Channel," Proc. of PIMRC'92, pp. 128-132, Oct. 1992.
M. L. Moher and J. H. Lodge, "TCMP-A Modulation and Coding Stategy for Fading Channels," IEEE JSAC, vol. SAC-7, pp. 1347-1355, Dec. 1985.
G. T. Irvine and P. J. McLane, "Symbol-Aided Plus Decision-Directed Reception for PSK/TCM Modulation on Shadowed Mobile Satellite Fading Channels," IEEE JSAC, vol. SAC-10, pp. 1289-1299, Dec. 1992.
A. J. Viterbi, "Spread Spectrum Communications-Myths and Realities," IEEE Comm. Magazine, vol. 17, No. 3, pp. 11-18, May 1979.
A. J. Viterbi and A. M. Viterbi, "Nonlinear Estimation of PSK-Modulated Carrier Phase with Application to Burst Digital Transmition," IEEE Trans. on Info. Theory, vol. IT-29, No. 4, pp. 543-551, Jul. 1983.
Cain David C.
Dempster Shawn B.
Motorola Inc.
Sonnentag Richard A.
LandOfFree
Method and apparatus for coherent communication in a spread-spec does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for coherent communication in a spread-spec, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for coherent communication in a spread-spec will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-402641