Simultaneous analog and digital communication using fractional r

Details Simultaneous analog and digital communication using fractional r Simultaneous analog and digital communication using fractional r

1997-09-02

1999-01-12

Tse, Young T.

Pulse or digital communications

Transmitters

Quadrature amplitude modulation

375261, 375308, 332103, H04L 2704

Patent

active

058598774

ABSTRACT:
Digital data is encoded using a modulus m converter to produce fractionally encoded words, where m is the nearest integer larger than 2.sup.c and c is a noninteger. The fractionally encoded words are mapped into a symbol constellation having m symbols to produce a two dimensional data signal. The data signal is added to a two dimensional analog signal, which was obtained by encoding an input analog signal, to produce a combined two dimensional signal. The combined signal is modulated using QAM and then transmitted over a communication channel.

REFERENCES:
patent: 4512013 (1985-04-01), Nash et al.
patent: 4546212 (1985-10-01), Crowder
patent: 4630287 (1986-12-01), Armstrong
patent: 4651320 (1987-03-01), Thapar
patent: 4672602 (1987-06-01), Hargrave et al.
patent: 4757495 (1988-07-01), Decker et al.
patent: 4891806 (1990-01-01), Farias et al.
patent: 4924516 (1990-05-01), Bremer et al.
patent: 5081647 (1992-01-01), Bremer
patent: 5103227 (1992-04-01), Betts et al.
patent: 5115453 (1992-05-01), Calderbank et al.
patent: 5162812 (1992-11-01), Aman et al.
patent: 5214656 (1993-05-01), Chung et al.
patent: 5243627 (1993-09-01), Betts et al.
patent: 5251236 (1993-10-01), Bremer et al.
patent: 5280503 (1994-01-01), Betts et al.
patent: 5305352 (1994-04-01), Calderbank et al.
patent: 5377194 (1994-12-01), Calderbank et al.
patent: 5475713 (1995-12-01), Bremer et al.
patent: 5521942 (1996-05-01), Betts et al.
patent: 5559791 (1996-09-01), Bremer et al.
"Adaptive Equalization and Phase Tracking for Simultaneous Analog/Digital Data Transmission" by Lim et al, The Bell System Technical Journal, vol. 60, No. 9, Nov. 1981 pp. 2039-2063.
"High-Speed Digital and Analog parallel Transmission Technique Over Telephone Channel" by Akashi, et al, IEE Transactions on Communications, vol. Com-30, No. 5, May 15, 1982, pp. 1213-1218.
"Simultaneous Transmission of Speech and Data Using Code-breaking Techniques," by Steele et al, The Bell System Journal, vol. 60, No. 9, Nov. 1981, pp. 2081-2105.
"Adaptive Noise Cancelling Principles and Applications," by Widrow et al, Proceedings of the IEE, vol. 63, No. 12, Dec. 1975.
"An Integrated Digital Subscribers Speech and Data Service" by Stagg et al, ICC '80 Conf. Rec., vol. 3, Seattle, Washington; Jun. 8-12, 1980 pp. 39.b.1-39.6.6.
"Frequency Domain Data Transmission Using Reduced Computational Complexity Algorithms," by Peled et al, ICASSP 80 Proc. Denver, Colo., vol. 1, Apr. 9-11, 1980, pp. 964-967.
"Speech and Data Transmission in ACS Telephone Channels" by Bukhviner, V.E., Telecomm. & Radio Eng., vol. 30/31; Jul. 1976, pp. 111-113.
"Speech-band data modems" by Adams, P.F., Electronics and Power, vol. 26, No. 9; Sep. 1980, pp. 733-736.
"Method for Superimposing Data on Amplitude-Modulated Signals" by Lockhart, G.B., Electronics Letters, Apr. 29, 1982, vol. 18, No. 9, pp. 379-381.
"A New Generation of Speech Plus Data Multiplexer" by Shum et al, Conf. on Communications and Equipment and Systems, Birmingham, England, Apr. 4-7, 1978, pp. 111-113.

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