Multiplex communications – Wide area network – Packet switching
Patent
1993-06-14
1995-09-05
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 321, 375261, 375222, 329304, 332103, H04J 1100
Patent
active
054485550
ABSTRACT:
A method and apparatus for concurrent communication of analog information and digital information. In general terms, when the communication channel is viewed as a multi-dimensional space, the digital information signal is divided into symbols, and the symbols are mapped onto the signal space with a preset distance between them. The analog signal, generally limited in magnitude to less than the distance separating the symbols, is converted to component signals and added (i.e., vector addition) to the symbols. The sum signal is then transmitted to the receiver where the symbols are detected and subtracted from the received signal to yield the analog signal components. The transmitted analog signal is recreated from those components. Both half-duplex and full-duplex operation is available in accordance with the disclosure.
REFERENCES:
patent: 4512013 (1985-04-01), Nash
patent: 4525846 (1985-06-01), Bremer et al.
patent: 4546212 (1985-10-01), Crowder, Sr.
patent: 4627077 (1986-12-01), Armstrong
patent: 4630287 (1986-12-01), Armstrong
patent: 4672602 (1987-06-01), Hargrave et al.
patent: 4757495 (1988-07-01), Decker et al.
patent: 4792940 (1988-12-01), Hiraguchi
patent: 4924516 (1990-05-01), Bremer et al.
patent: 5081647 (1992-01-01), Bremer
patent: 5103227 (1992-04-01), Betts
patent: 5105443 (1992-04-01), Betts et al.
"Adaptive Equalization and Phase Tracking for Simultaneous Analog/Digital Data Transmission", The Bell System Technical Journal, vol. 60, No. 9, Nov. 1981, by T. L. Lim and M. S. Mueller, pp. 2039-2063.
"High Speed Digital and Analog Parallel Transmission Technique Over Single Telephone Channel", IEEE Transactions on Communications, vol. COM-30, No. 5, May 1982, by F. Akashi, Y. Sato and M. Eguchi, pp. 1213-1218.
"Simultaneous Transmission of Speech and Data Using Code-Breaking Techniques", The Bell System Technical Journal, vol. 60, No. 9, Nov. 1981, by R. Steele and D. Vitello, pp. 2081-2105.
"Adaptive Noise Cancelling: Principles and Applications", Proceedings of the IEEE, vol. 63, No. 12, Dec. 1975, by B. Widrow et al, pp. 1692-1716.
"An Integrated Digital Subscribers Speech and Data Service", ICC Conf. Rec., vol. 3, Seattle, Washington, Jun. 8-12, 1980, by L. J. Stagg and D. Clothier, pp. 39.6.1-39.6.6.
"Frequency Domain Data Transmission using Reduced Computational Complexity algorithms", ICASSP 80 Proc., Denver, Colorado, vol. 1, Apr. 9-11, 1980, by A. Peled and A. Ruiz, pp. 964-967.
"Speech-band data modems", Electronics & Power, vol. 26, No. 9, by P. F. Adams, pp. 733-736.
"Speech and Data Transmission in ACS Telephone Channels", Telecommunication & Radio Eng., vol. 30/31, Jul. 1976, by V. E. Bukhviner, pp. 66-70.
"Method for superimposing Data on Amplitude-Modulated Signals", Electronics Letters, vol. 18, No. 9, Apr. 29, 1982, by Lockhart et al, pp. 379-381.
"A New Generation of Speech Plus Data Multiplexer", Conference on Communications and Equipment and Systems, Birmingham, England, Apr. 4-7, 1978, by N. N. Y. Shum et al, pp. 111-113.
Bremer Gordon
Ko Kenneth D.
Smithwick Luke J.
AT&T Corp.
Blum Russell W.
Brendzel Henry T.
Olms Douglas W.
LandOfFree
Simultaneous analog and digital communication does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Simultaneous analog and digital communication, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simultaneous analog and digital communication will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-478761