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| United States Patent | 6021158 |
| Link to this page | http://www.wikipatents.com/6021158.html |
| Inventor(s) | Schurr; Paul E. (Plano, TX), Chen; Walter Y. (Plano, TX), Weiner; Douglas B. (The Colony, TX) |
| Abstract | A modem that operates selectively in the voice-band frequency band and at
higher frequency bands is provided. This modem supports multiple line
codes, like DMT and CAP. The modem uses a Digital Signal Processor (DSP),
so that different existing ADSL line codes, such as Discrete MultiTone
(DMT) and Carrierless AM/PM (CAP), can be implemented on the same hardware
platform. The modem negotiates in real-time, for a desired line
transmission rate to accommodate line condition and service-cost
requirement. The line code and rate negotiation process may be implemented
at the beginning of each communication session through the exchange of
tones between the modems. A four-step MDSL modem initialization process is
provided for line code and rate compatibility. |
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Title Information  |
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| Publication Date |
February 1, 2000 |
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| Filing Date |
October 31, 1996 |
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| Parent Case |
This application is a Continuation-in-Part of currently pending patent
application Ser. No. 08/667,267 (TI-22963AA), filed Jun. 20, 1996, which
is a Continuation-in-Part of currently pending patent application Ser. No.
08/645,020 (TI-22963), filed May 9, 1996.
Co-filed Ser. Nos. 08/741,776 filed OCT. 31, 1996 (TI-23224) and 08/742,795
filed Oct. 31, 1996 (TI-23435), disclose related subject matter.
This case is also related to Ser. Nos. 08/667,267 filed Jun. 20, 1996
(TI-22963), 08/716,533 filed Sep. 4, 1996 (TI-24080), 08/707,774 filed
Sep. 4, 1996 (TI-23874), and 08/686,901 filed Jul. 19, 1996 (TI-23725),
08/741,779 (TI-23300), 08/739,398 (Oct. 31, 1996) (TI-23299), 08/741,780
(Oct. 31, 1996) (TI-23223), 08/742,066 (TI-23297), 08/744,140 (TI-23322),
08/742,095 (TI-23183), 08/742,226 (Oct. 31, 1996) (TI-22050), 08/744,724
(TI-23293), 08/741,778 (TI-23296), 08/740,594 (TI-24085), 08/739,883
(TI-24086), 08/740,575 (Oct. 31, 1996) (TI-22964), and 08/741,839 (Oct.
31, 1996) (TI-23224AA) and 08/741,777 (Oct. 31, 1996) (TI-23773).
All of the foregoing applications have a common Assignee. |
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Title Information |
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U.S. References |
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| | Reference | Relevancy | Comments | Reference | Relevancy | Comments | 5579535
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| | Reference | Relevancy | Comments | Veeneman, D., et al., ADSL for Video and Data Service, ICC '95 Seattle, WA, Communications--Gateway to Globalization, 1995 IEEE Int'l Conf. on Comm., Jun. 18-22, 1995; 0-7803-2486-2/95, 1995 IEEE.
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[0 after 0 votes] | | Crespo, P., et al., Pole-Zero Decision Feedback Equalization for the Digital Subscriber Loop, Globecom '90, IEEE Global Telecomm. Conf. &
Exhibit, San Diego, CA, Dec. 2-5, 1990, "Communications: Connecting the Future"; CH2827-4/90/0000-11666, 1990 IEEE, pp. 1166-1171.
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[0 after 0 votes] | | Cook, John, Splitter for VDSL, T1E1.4 Contribution, American Nat'l Standards Institute Telecommunications Committee (ANSI/T1), Jan. 22-25, 1996, Irvine, CA Meeting, 10 pages.
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[0 after 0 votes] | | Sistanizadeh, K., Analysis and Performance Evaluation Studies of High Bit Rate Digital Subscriber Lines (HDSL) Using QAM and PAM Schemes With Ideal Decision Feedback Equalization (DFE) Within a Carrier Serving Area (CSA), Globecom '90, IEEE Global
Telecomm. Conf. & Exhibit, San Diego, CA, Dec. 2-5, 1990, "Communications: Connecting the Future"; CH2827-4/90/0000-1172, 1990 IEEE.
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[0 after 0 votes] | | Honig, M.L., et al., Suppression of Near- and Far-End Crosstalk by Linear Pre- and Post-Filtering, IEEE Journal on Selection Areas in Comm., vol. 10, No. 3, Apr. 1992, pp. 614-629.
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[0 after 0 votes] | | Cioffi, J.M., et al., Detailed DMT Transmiter Description for ADSL, ANSI T1E1.4 Committee Contribution No. 93-084, Chicago, Apr. 1993, pgs.
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Nov,2006 | Your vote accepted
[0 after 0 votes] | | Cioffi, J.M., et al., DMT Specification Overview for ADSL, ANSI T1E1.4 Committe Contribution No. 93-083, Chicago, Apr. 1993, pgs.
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[0 after 0 votes] | | Chow, J.S, Finite-Length Equalization for Multi-Carrier Transmission Systems, Ph.D. Dissertation, Stanford University, California, Jun. 1992.
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[0 after 0 votes] | | Chow, J.S., et al., Equalizer Training Algorithms for Multicarrier Modulation Systems, 1993 Int'l Conf. on Communications, Geneva, May 1993, pp. 761-765.
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[0 after 0 votes] | | Chow, J.S., et al., Recommended Training Sequence for Time-domain Equalizers (TQE) With DMT, ANSI T1E1.4 Committee Contribution No. 93-968, pgs.
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[0 after 0 votes] | | ADSL Forum WWW Site, Dec., 1995: Daly, Tom (editor), Study Project: Packet Mode Technical Group Working Text, 12 pages.
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[0 after 0 votes] | | The Applied Technologies Group, AT&T Paradyne, ADSL, SDSL, HDSL, Copper Phone Line Technologies for Multimedia, Pocket Guide, One Apple Hill, #316, Natick, MA 01760 pp. 1-41.
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[0 after 0 votes] | | AT&T Paradyne, News Release, Bell Atlantic Supports AT&T Paradyne's GlobeSpan.TM. Technology, Largo, Florida, Nov. 1, 1995, 34 pages.
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[0 after 0 votes] | | Maxwell, Kim, Study Project: ADSL Issue II--Variable Rate ADSL, Independent Editions, Apr. 22, 1996, 1057 University Ave., Palo Alto, CA 94301, T1E1.4/95-129, 2 pages.
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[0 after 0 votes] | | Starr, Tom, Project: ADSL--Rate Adaptive DSL, Apr. 22, 1996, Colorado Springs, Ameritech, 2000 W. Ameritech Drive, Rm. 3C52, Hoffman Estates, IL 60196, pp. 1-5.
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[0 after 0 votes] | | Keyes, Philip J., ADSL Standard Project--Proposal for Annex to ADSL Standard, Apr. 22, 1996, Col. Springs, CO, Bell South Telcomm., 3535 Colonnade Pkwy, Rm W1D1, Birmingham, AL 35243, 3 pgs.
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[0 after 0 votes] | | Cook, John, Telephony Transmission and Splitters, Passive and Active, T1E1.4 Contribution, American Nat'l Standards Institute Telecomm. Comm. (ANSI/T1), Feb. 14-18, 1994 San Francisco Mtg, 14 pages.
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[0 after 0 votes] | | Cioffi, J.M., et al., Project: T1E1.4: ADSL--Rate Adaptation and the ANSI T1.413 DMT ADSL Data Rate Throttle, Amati Comm. Corp., 1975 Mountain View, CA 94040, pp. 1-10.
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[0 after 0 votes] | | Scholtz, W.H., et al., Study Project: HDSL Study Project--Variable Bit Rate ADSL Using Carrierless AM/PM (CAP), Lucent Technologies, 101 Crawfords Corner Rd., Rm. 4L-322, Holmdel, NJ 07733-3030, pp. 1-4.
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[0 after 0 votes] | | Lechleider, J.W., The Capacity of Next-Impaired Subscriber Loops, Bellcore, Globecom '90, IEEE Global Telecomm. Conf. & Exhibit, San Diego, CA, Dec. 2-5, 1990, "Communications: Connecting the Future"; CH2827-4/90/000, 1990 IEEE.
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[0 after 0 votes] | | ADSL Forum WWW Site, Dec., 1995: About the ADSL Forum, 8 pages.
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[0 after 0 votes] | | ADSL Forum WWW Site, Dec., 1995: ADSL--Twisted Pair Access to the Information Highway,4 pages.
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[0 after 0 votes] | | ADSL Forum WWW Site, Dec., 1995: VSDL--Fiber-Copper Access to the Information Highway, 7 pages.
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[0 after 0 votes] | | ADSL Forum WWW Site, Dec., 1995: A Tutorial Glossary of Copper Access Transmission Terminology, 10 pages.
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[0 after 0 votes] | | ADSL Forum WWW Site, Dec., 1995: The World is Already Wired for Multimedia Communications, 2 pages.
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[0 after 0 votes] | | ADSL Forum WWW Site, Dec., 1995: Working Text: Interfaces and System Configurations for ADSL: Bit Synchronous Mode, 15 pages.
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[0 after 0 votes] | | Integrated Circuit Engineering Corporation, A Study of the MPU, MCU & DSP Markets, Digital Signal Processors, Microprocessor 1996,Editor: Bill McClean, Author: Jack Quinn, Scottsdale, AZ, pp. 12-19 to 12-33..
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