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

1993-06-14

1997-11-04

Coles, Sr., Edward L.

Pulse or digital communications

Transmitters

Quadrature amplitude modulation

375261, 375298, H04L 2704

Patent

active

056848340

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, Sr.
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: 5081647 (1992-01-01), Bremer
patent: 5103227 (1992-04-01), Betts
patent: 5115453 (1992-05-01), Calderbank et al.
patent: 5214656 (1993-05-01), Chung et al.
patent: 5243627 (1993-09-01), Betts et al.
patent: 5251236 (1993-10-01), Brehmer et al.
patent: 5377194 (1994-12-01), Calderbank
Lim, T. L., et al "Adaptive Equalization and Phase Tracking for Simultaneous Analog/Digital Data Transmission" The Bell System Technical Journal, vol. 60, No. 9, Nov. 1981, pp. 2039-2063.
Fumio 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 15, 1982, pp. 1213-1218.
R. Steele, et al., "Simultaneous Transmission of Speech and Data Using Code-Breaking Techniques", The Bell System Technical Journal, vol. 60, No. 9, Nov. 1981, pp. 2081-2105.
B. Widrow, et al., "Adaptive Noise-Cancelling: Principles and Applications", Proceedings of the IEEE, vol. 63, No. 12, Dec., 1975.
Stagg, L. J., et al., "An Integrated Digital Subscribers Speech and Data Service", ICC '80 Conf. Rec., vol. 3, Seattle, Wash.; Jun.8-12, 1980. pp. 39.6.1-39.6.6.
Peled, A., et al "Frequency Domain Data Transmission Using Reduced Computational Complexity Algorithms", ICASSP 80 Proc. Denver, Colo., vol. 1, Apr. 9-11, 1980, pp. 964-967.
Adams, P. F., "Speech-band data modems", Electronics & Power, vol. 26, No.9; Sep. 1980, pp. 733-736.
Bukhviner, V. E., "Speech and Data Transmission in ACS Telephone Channels", Telecomm. & Radio Eng., vol. 30/31; Jul. 1976, pp. 111-113.
Lockhart, G. B., et al., "Method for Superimposing Data on Amplitude-Modulated Signals", Electronics Letters, Apr. 29, 1982, vol. 18, No. 9, pp. 379-381.
Shum, M. N. Y., et al., "A New Generation of Speech Plus Data Multiplexer", Conf. on Communications and Equipment and Systems, Birmingham, England, Apr. 4-7, 1978, pp. 111-113.

Affiliated with

Also associated with

Rating

Simultaneous analog and digital communication using fractional r 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 using fractional r, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simultaneous analog and digital communication using fractional r will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1839341