Simultaneous analog and digital communication

Details Simultaneous analog and digital communication Simultaneous analog and digital communication

1995-05-30

1997-08-26

Blum, Russell W.

Multiplex communications

Generalized orthogonal or special mathematical techniques

Quadrature carriers

370286, 375222, H04L 2734

Patent

active

056617186

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 (1985-07-01), Bremer et al.
patent: 4546212 (1985-10-01), Crowder
patent: 4627077 (1986-12-01), Armstrong
patent: 4630287 (1986-12-01), Armstrong
patent: 4672602 (1987-06-01), Hargrave 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.
patent: 5448555 (1995-09-01), Bremer et al.
Lockhart et al., "Method for Superimposing Data on Amplitude-Modulated Signals", Electronics Letters, vol. 18, No. 9.
Shum et al., "A New Generation of Speech Plus Data Multiplexer", Conference on Communications and Equipment Systems, Birmingham, England.
Stagg et al., "An Integrated Digital Subscribers Speech and Data Service", ICC Conf. Rec., vol. 3, Seattle, Washington Jun. 1980.
Peled et al., "Frequency Domain Data Transmission using Rduced Computational Complexity Algorithms", ICASSP 80 Proc., Denver, Colorado, vol. 1 Apr. 1990.
Adams, "Speech-band data modems", Electronics and Power, vol. 26, No. 9 1980.
Bukhviner, "Speech and Data Transmission in ACS Telephone Channels", Telecommunication and Radio Eng., vol. 30/31 Jul. 1976.
Lim et al., "Adaptive Equalization and Phase Tracking for Simultaneous Analog/Digital Data Transmission", The Bell System technical Journal, vol. 60, No. 9 Nov. 1981.
Akashi et al., "High Speed Digital and Analog Parallel Transmission Technique Over Single Telephone Channel", IEEE Transactions on Communications, vol. COM-30, No. 5 May 1982.
Steele et al., "Simultaneous Transmission of Speech and Data Using Code-Breaking Techniques", The Bell System Technical Journal, vol. 60, No. 9 Nov. 1981.
Widrow et al., "Adaptive Noise-Cancelling: Principles and Applications", Proceedings of the IEEE, vol. 63, No. 12 Dec. 1975.

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