DE69330729D1 - Verfahren zur Symbolratenanpassung in einem Kommunikationsnetz - Google Patents
Verfahren zur Symbolratenanpassung in einem KommunikationsnetzInfo
- Publication number
- DE69330729D1 DE69330729D1 DE69330729T DE69330729T DE69330729D1 DE 69330729 D1 DE69330729 D1 DE 69330729D1 DE 69330729 T DE69330729 T DE 69330729T DE 69330729 T DE69330729 T DE 69330729T DE 69330729 D1 DE69330729 D1 DE 69330729D1
- Authority
- DE
- Germany
- Prior art keywords
- adapting
- communication network
- symbol rates
- rates
- symbol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/345—Modifications of the signal space to allow the transmission of additional information
- H04L27/3455—Modifications of the signal space to allow the transmission of additional information in order to facilitate carrier recovery at the receiver end, e.g. by transmitting a pilot or by using additional signal points to allow the detection of rotations
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/891,500 US5521949A (en) | 1992-05-29 | 1992-05-29 | Synchronization scheme for digital communications systems transporting data at a customer-controlled rate |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69330729D1 true DE69330729D1 (de) | 2001-10-18 |
DE69330729T2 DE69330729T2 (de) | 2002-07-11 |
Family
ID=25398296
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69330729T Expired - Lifetime DE69330729T2 (de) | 1992-05-29 | 1993-05-20 | Verfahren zur Symbolratenanpassung in einem Kommunikationsnetz |
Country Status (4)
Country | Link |
---|---|
US (1) | US5521949A (de) |
EP (1) | EP0572168B1 (de) |
JP (1) | JP3305424B2 (de) |
DE (1) | DE69330729T2 (de) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5970088A (en) * | 1996-05-09 | 1999-10-19 | Texas Instruments Incorporated | Reverse channel next cancellation for MDSL modem pool |
US5790658A (en) * | 1996-10-28 | 1998-08-04 | Advanced Micro Devices, Inc. | High performance echo canceller for high speed modem |
US6246716B1 (en) * | 1997-01-31 | 2001-06-12 | Adtran, Inc. | Information communication system |
US5987073A (en) * | 1997-03-27 | 1999-11-16 | Thomson Consumer Electronics, Inc. | Symbol timing recovery network for a carrierless amplitude phase (CAP) signal |
US6233287B1 (en) * | 1997-04-04 | 2001-05-15 | Motorola, Inc. | Method and apparatus for mixing signals |
US6212228B1 (en) * | 1997-09-10 | 2001-04-03 | Nortel Networks Limited | Apparatus for modulation and demodulating digital data |
US6144695A (en) * | 1997-12-23 | 2000-11-07 | At&T Corp. | Method and apparatus for reducing near-end crosstalk (NEXT) in discrete multi-tone modulator/demodulators |
DE69839814D1 (de) * | 1997-12-29 | 2008-09-11 | Motorola Inc | Methode und apparat zum auswählen eines konstellationspunktes für jede gruppe von datenbits, welche durch ein analoges pcm-modem übertragen werden sollen |
US6658049B1 (en) * | 1999-01-12 | 2003-12-02 | Cisco Technology, Inc. | xDSL repeater system and method |
US6707868B1 (en) * | 1999-04-12 | 2004-03-16 | Intel Corporation | Apparatus for recovering timing of a digital signal for a transceiver |
CN100391122C (zh) * | 1999-07-08 | 2008-05-28 | 三星电子株式会社 | 移动通信系统中用于控制速率匹配的去复用器和复用器的设备和方法 |
FR2808361B1 (fr) * | 2000-04-27 | 2002-06-14 | Canon Kk | Procede et dispositif de codage d'un signal numerique pour transmission dudit signal par modulation d'au moins une porteuse |
US7921290B2 (en) * | 2001-04-18 | 2011-04-05 | Ipass Inc. | Method and system for securely authenticating network access credentials for users |
US7469341B2 (en) * | 2001-04-18 | 2008-12-23 | Ipass Inc. | Method and system for associating a plurality of transaction data records generated in a service access system |
US20030065919A1 (en) * | 2001-04-18 | 2003-04-03 | Albert Roy David | Method and system for identifying a replay attack by an access device to a computer system |
US7349486B2 (en) * | 2001-07-19 | 2008-03-25 | Agere Systems Guardian Corporation | System and method for recognizing zero-amplitude symbols in a QAM signal and digital receiver incorporating the same |
US7406117B2 (en) * | 2002-03-21 | 2008-07-29 | Westell Technologies, Inc. | XDSL multi-hybrid modem with power spectral density shaping |
US8606885B2 (en) * | 2003-06-05 | 2013-12-10 | Ipass Inc. | Method and system of providing access point data associated with a network access point |
US7539862B2 (en) * | 2004-04-08 | 2009-05-26 | Ipass Inc. | Method and system for verifying and updating the configuration of an access device during authentication |
US8027279B2 (en) * | 2007-09-17 | 2011-09-27 | Lantiq Deutschland Gmbh | Echo cancellation |
JP4474532B2 (ja) * | 2007-12-27 | 2010-06-09 | テクトロニクス・インターナショナル・セールス・ゲーエムベーハー | 信号発生システム |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3680051A (en) * | 1970-07-29 | 1972-07-25 | Honeywell Inf Systems | Apparatus for maintaining character synchronization in a data communication system |
US3825899A (en) * | 1971-08-11 | 1974-07-23 | Communications Satellite Corp | Expansion/compression and elastic buffer combination |
GB1479313A (en) * | 1975-03-26 | 1977-07-13 | Marconi Co Ltd | Digital data rate converters |
GB1581521A (en) * | 1978-05-31 | 1980-12-17 | Digital Communications Corp | Tdma multiplexer-demultiplexer with multiple ports |
US4644537A (en) * | 1984-12-24 | 1987-02-17 | American Telephone And Telegraph Company | Inband coding of secondary data |
US4651320A (en) * | 1984-12-24 | 1987-03-17 | American Telephone And Telegraph Company | Inband coding of secondary data |
US4993046A (en) * | 1988-06-24 | 1991-02-12 | Nippon Telegraph And Telephone Corporation | Coded modulation communication system |
US4941154A (en) * | 1989-05-30 | 1990-07-10 | At&T Bell Laboratories | Trellis coding method and arrangement for fractional bit rates |
US5105443A (en) * | 1990-05-29 | 1992-04-14 | At&T Bell Laboratories | Inband coding of secondary data |
US5134633A (en) * | 1990-11-30 | 1992-07-28 | At&T Bell Laboratories | Digital communications synchronization scheme |
US5251236A (en) * | 1991-04-05 | 1993-10-05 | At&T Paradyne Corporation | Fractional rate modem with trellis |
US5173900A (en) * | 1991-05-17 | 1992-12-22 | General Instrument Corporation | Method and apparatus for communicating different categories of data in a single data stream |
-
1992
- 1992-05-29 US US07/891,500 patent/US5521949A/en not_active Expired - Lifetime
-
1993
- 1993-05-20 DE DE69330729T patent/DE69330729T2/de not_active Expired - Lifetime
- 1993-05-20 EP EP93303903A patent/EP0572168B1/de not_active Expired - Lifetime
- 1993-05-28 JP JP14837393A patent/JP3305424B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP3305424B2 (ja) | 2002-07-22 |
JPH0637836A (ja) | 1994-02-10 |
EP0572168B1 (de) | 2001-09-12 |
US5521949A (en) | 1996-05-28 |
EP0572168A3 (de) | 1994-08-03 |
DE69330729T2 (de) | 2002-07-11 |
EP0572168A2 (de) | 1993-12-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition |