Pulse or digital communications – Transmitters
Patent
1993-06-14
1996-05-28
Coles, Sr., Edward L.
Pulse or digital communications
Transmitters
375265, 375264, 375261, 371 43, H04L 2704, H04L 2302, H04L 512, G06F 1110
Patent
active
055219420
ABSTRACT:
A communications system simultaneously transmits both a primary data signal and a secondary voice signal in such a way that the dynamic range of the secondary voice signal is increased even though deliberate errors are introduced into the transmitted data portion of the signal. In particular, the communications system includes an error correcting technique like channel encoding and the constellation signal space is divided into a number of regions, where at least one of the regions overlaps with another region. The primary signal is channel encoded to select a particular one of the number of regions, the region being represented by a reference signal point value. The voice signal is encoded to provide a signal point vector, which is added to the reference signal point in such a way that the resultant signal point is located in the overlapping region thereby deliberately introducing an error into the resulting transmitted signal point stream. Notwithstanding the deliberately introduced error, the channel encoding of the primary signal allows a receiver to recover the originally selected reference signal point value, which when subtracted from the received signal point value approximates the voice signal.
REFERENCES:
patent: 4512013 (1985-04-01), Nash et al.
patent: 4534040 (1985-08-01), Thapar
patent: 4546212 (1985-10-01), Crowder
patent: 4651320 (1987-03-01), Thapar
patent: 4672602 (1987-06-01), Hargrave et al.
patent: 4757495 (1988-07-01), Decker et al.
patent: 4924516 (1990-05-01), Bremer et al.
patent: 5023889 (1991-06-01), Divsalar et al.
patent: 5081647 (1992-01-01), Bremer
patent: 5103227 (1992-04-01), Betts
patent: 5243629 (1993-09-01), Wei
"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 on Speech and Data Using Code-Bearing 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. 1975, USA.
"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.
Betts William L.
Bremer Gordon
Smithwick Luke J.
Zuranski Edward S.
AT&T Corp.
Coles Sr. Edward L.
Esposo Allan A.
Opalach Joseph J.
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