High speed communications system for analog subscriber connectio

Details High speed communications system for analog subscriber connectio High speed communications system for analog subscriber connectio

1997-04-11

1998-09-15

Bocure, Tesfaldet

Pulse or digital communications

Pulse code modulation

Noise or distortion reduction

375222, H04B 1500, H04L 516

Patent

active

058090754

ABSTRACT:
A new data communication system is described which enables data transmission over existing telephone lines at rates higher than possible with existing methods, including conventional modems. By using a novel asymmetric configuration of the two communication endpoints, the currently-accepted maximum theoretical limits on the data rate are no longer applicable. One endpoint is connected directly to a digital telephone network, whereas the other endpoint uses a conventional telephone connection. This reduces the transmission problem to compensation for a single telephone line interface and a single analog local loop. Device for providing this compensation and the required clock synchronization were also created, enabling a practical implementation of the system. The new system can achieve rates up to 64,000 bits-per-second and has broad utility in several active areas including wide-band audio transmission, video transmission, networking, facsimile transmission, and remote computer access.

REFERENCES:
patent: 4122300 (1978-10-01), Busigny et al.
patent: 4785448 (1988-11-01), Reichert et al.
patent: 4825448 (1989-04-01), Critchlow et al.
patent: 4884269 (1989-11-01), Duncanson et al.
patent: 4890303 (1989-12-01), Bader
patent: 4890316 (1989-12-01), Walsh et al.
patent: 4899333 (1990-02-01), Roediger
patent: 4922484 (1990-05-01), Yoshida et al.
patent: 4922490 (1990-05-01), Blakley
patent: 4924492 (1990-05-01), Gitlin et al.
patent: 4947483 (1990-08-01), Dirr
patent: 4958369 (1990-09-01), Tsuchida
patent: 4965641 (1990-10-01), Blackwell et al.
patent: 4995057 (1991-02-01), Chung
patent: 5034948 (1991-07-01), Mizutani et al.
patent: 5052023 (1991-09-01), Beichler et al.
patent: 5052024 (1991-09-01), Moran, III et al.
patent: 5056088 (1991-10-01), Price et al.
patent: 5060241 (1991-10-01), Allouis et al.
patent: 5091920 (1992-02-01), Ikeda et al.
patent: 5095481 (1992-03-01), Berkovich
patent: 5117425 (1992-05-01), Ogata
patent: 5124976 (1992-06-01), Lemaistre et al.
patent: 5127003 (1992-06-01), Doll, Jr. et al.
patent: 5134611 (1992-07-01), Steinka et al.
patent: 5144625 (1992-09-01), Cain et al.
patent: 5166955 (1992-11-01), Ohta
patent: 5195184 (1993-03-01), Peterson et al.
patent: 5199031 (1993-03-01), Dahlin
patent: 5214650 (1993-05-01), Renner et al.
patent: 5220560 (1993-06-01), Ogasawara
patent: 5224108 (1993-06-01), McDysan et al.
patent: 5235597 (1993-08-01), Himwich et al.
patent: 5237561 (1993-08-01), Pyhalammi
patent: 5243593 (1993-09-01), Timbs
patent: 5247347 (1993-09-01), Litteral et al.
patent: 5265125 (1993-11-01), Ohta
patent: 5267263 (1993-11-01), Feezel et al.
patent: 5268937 (1993-12-01), Marbot
patent: 5274702 (1993-12-01), Rosch et al.
patent: 5278865 (1994-01-01), Amrany et al.
patent: 5291479 (1994-03-01), Vaziri et al.
patent: 5305312 (1994-04-01), Fornek et al.
patent: 5384806 (1995-01-01), Agazzi
patent: 5387941 (1995-02-01), Montgomery et al.
patent: 5394437 (1995-02-01), Ayanoglu et al.
patent: 5406583 (1995-04-01), Dagdeviren
patent: 5434884 (1995-07-01), Rushing et al.
patent: 5434913 (1995-07-01), Tung et al.
patent: 5473552 (1995-12-01), Chen et al.
patent: 5528595 (1996-06-01), Walsh et al.
Harris and Wechselberger, Multirate All-Digital Modem for Support of Universal Multiplex Transport Layer for Digital Compression, Annual Convention and Exposition of the National Cable Television Assocation (Jun. 6, 1993).
Mazo, Faster-Than-Nyquist Signalling, Bell System Technical Journal (Oct. 8, 1975).
IEEE (ICC'93) Conference Article by I. Kalet, J.E. Mazo, B.R. Saltzberg, "The Capacity of PCM Voiceband Channels," Feb. 1993, pp. 507-511.
IEEE 1986 Article by K. Pahlavan and J.L. Holsinger, "A Method to Counteract the Effects of PCM Systems on the Performance of Ultra High Speed Voice-Band Modems," pp. 1592-1596.
IEEE 1985 Article by K. Pahlavan and J.L. Holsinger, "A Model For the Effects of PCM Compandors on the Performance of High Speed Modems," pp. 758-762.

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