Shaped signal spaces in a simultaneous voice and data system

Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train

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375259, H04L 512, H04L 2704

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054757134

ABSTRACT:
In a simultaneous voice and data communications system, a voice signal is mapped into an N-dimensional signal space constellation as a vector, and added to a reference signal point, i.e., a data symbol, where the data symbol is selected from a constellation of data symbols every signaling interval as a function of a data signal. The constellation signal space is further divided into a number of shaped regions, where each region is associated with a different one of the data symbols. The shape of each region is selected as a function of the characteristics of the voice, or audio, signal. In particular, each region illustratively has a rectangular shape.

REFERENCES:
patent: 4512013 (1985-04-01), Nash et al.
patent: 4546212 (1985-10-01), Crowder
patent: 4672602 (1987-06-01), Hargrave et al.
patent: 4757495 (1988-07-01), Decker et al.
patent: 4891806 (1990-01-01), Farias
patent: 4924516 (1990-05-01), Bremer et al.
patent: 4937844 (1990-06-01), Kao
patent: 5022053 (1991-06-01), Chung
patent: 5081647 (1992-01-01), Bremer
patent: 5103227 (1992-04-01), Betts
patent: 5185763 (1993-02-01), Krishnan
patent: 5237292 (1993-08-01), Chethik
"Adaptive Equalization and Phase Tracking for Simultaneous Analog/Digital Data Transmission" by T. L. Lim and M. S. Mueller, The Bell System Technical Journal, vol. 60, No. 9, Nov. 1981, pp. 2039-2063, U.S.A.
"High-Speed Digital and Analog Parallel Transmission Technique Over Single Telephone Channel" by Fumio Akashi, Yoichi Sato and Mikiro Eguchi, IEEE Transactions On Communications, vol. Com. 30, No. 5, May 1982, pp. 1213-1218.
"Simultaneous Transmission of Speech and Data Using Code-Breaking Techniques", by R. Steele and D. Vitello, The Bell System Technical Journal, vol. 60, No. 9, pp. 2081-2105, Nov. 1981, USA.
"Adaptive Noise Cancelling: Principles and Applications" by Bernard Widrow, John R. Glover, Jr., John M. McCool, John Kaunitz, Charles S. Williams, Robert H. Hearn, James R. Zeidler, Eugene Dong, Jr., and Robert C. Goodlin, Proceedings of the IEEE, vol. 63, No. 12, Dec.
"An Integrated Digital Subscribers Speech and Data Service" by L. J. Stagg and D. Clothier, GEC Hirst Research Centre, Wembley, Middlesex, England and GEC Telecommunications Ltd., Coventry, England, pp. 39.6.1-39.6.6, London.
"Frequency Domain Data Transmission Using Reduced Computational Complexity Algorithms", by Abraham Peled and Antonio Ruiz, Computer Sciences, Department, IBM T. J. Watson Research Center, IEE 1980, pp. 964-967, USA.
"Speech-band data modems" by P. F. Adams, IEE, 1980, pp. 733-736. USA.
"Speech and Data Transmission In ACS Telephone Channels" by V. E. Bukhviner, Telecommunication & Radio Eng., vol. 30/31, Jul. 1976.
"Method for Superimposing Data On Amplitude-Modulated Signals" Electronics Letters, 29 Apr. 1982, vol. 18, No. 9, pp. 379-381, USA.
"A New Generation of Speech Plus Data Multiplexer", by M. N. Y. Shum, N. A. Samuel and C. Laval, Computer and Systems Engineering Limited (Case), pp. 111-112, London.

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