HK1033870A1 - Method and apparatus for sychronizing a data communication system to a periodic digital impairment. - Google Patents
Method and apparatus for sychronizing a data communication system to a periodic digital impairment.Info
- Publication number
- HK1033870A1 HK1033870A1 HK01103247A HK01103247A HK1033870A1 HK 1033870 A1 HK1033870 A1 HK 1033870A1 HK 01103247 A HK01103247 A HK 01103247A HK 01103247 A HK01103247 A HK 01103247A HK 1033870 A1 HK1033870 A1 HK 1033870A1
- Authority
- HK
- Hong Kong
- Prior art keywords
- sychronizing
- communication system
- data communication
- periodic digital
- digital impairment
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
- H04L25/40—Transmitting circuits; Receiving circuits
- H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
- H04L25/4917—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes
- H04L25/4927—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes using levels matched to the quantisation levels of the channel
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/12—Arrangements providing for calling or supervisory signals
- H04J3/125—One of the channel pulses or the synchronisation pulse is also used for transmitting monitoring or supervisory signals
-
- 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
- H04L27/3461—Modifications of the signal space to allow the transmission of additional information in order to transmit a subchannel
- H04L27/3472—Modifications of the signal space to allow the transmission of additional information in order to transmit a subchannel by switching between alternative constellations
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/009,228 US6023493A (en) | 1998-01-20 | 1998-01-20 | Method and apparatus for synchronizing a data communication system to a periodic digital impairment |
PCT/US1999/001005 WO1999037051A2 (fr) | 1998-01-20 | 1999-01-19 | Procede et appareil pour synchroniser un systeme de communication de donnees avec des perturbations numeriques periodiques |
Publications (1)
Publication Number | Publication Date |
---|---|
HK1033870A1 true HK1033870A1 (en) | 2001-09-28 |
Family
ID=21736372
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
HK01103247A HK1033870A1 (en) | 1998-01-20 | 2001-05-08 | Method and apparatus for sychronizing a data communication system to a periodic digital impairment. |
Country Status (5)
Country | Link |
---|---|
US (3) | US6023493A (fr) |
EP (1) | EP1050127B1 (fr) |
DE (1) | DE69919982T2 (fr) |
HK (1) | HK1033870A1 (fr) |
WO (1) | WO1999037051A2 (fr) |
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US6885715B1 (en) * | 1998-07-29 | 2005-04-26 | Intel Corporation | Method and apparatus for synchronizing a network link |
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US6625208B2 (en) | 1998-09-25 | 2003-09-23 | Intel Corporation | Modem using batch processing of signal samples |
US6574239B1 (en) * | 1998-10-07 | 2003-06-03 | Eric Morgan Dowling | Virtual connection of a remote unit to a server |
US7254167B2 (en) | 1998-10-30 | 2007-08-07 | Broadcom Corporation | Constellation-multiplexed transmitter and receiver |
US6522688B1 (en) * | 1999-01-14 | 2003-02-18 | Eric Morgan Dowling | PCM codec and modem for 56K bi-directional transmission |
US6597732B1 (en) * | 1999-01-14 | 2003-07-22 | Eric Morgan Dowling | High-speed modem with uplink remote-echo canceller |
US6721279B1 (en) | 1999-02-02 | 2004-04-13 | Pctel, Inc. | Method and apparatus for adaptive PCM level estimation and constellation training |
US6523233B1 (en) * | 1999-04-22 | 2003-02-25 | Agere Systems, Inc. | Method and apparatus for telephone network impairment detection and compensation in signal transmission between modems |
US6512787B1 (en) * | 1999-04-23 | 2003-01-28 | Pc-Tel, Inc. | Digital impairment learning method and system |
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US7339996B2 (en) * | 1999-06-24 | 2008-03-04 | Intel Corporation | Receiver codec super set constellation generator |
US6724814B1 (en) * | 1999-06-24 | 2004-04-20 | Intel Corporation | Pad and CODEC detection |
US6721357B1 (en) | 1999-06-24 | 2004-04-13 | Intel Corporation | Constellation generation and re-evaluation |
US6301296B1 (en) * | 1999-06-24 | 2001-10-09 | Cirrus Logic, Inc. | Digital impairment learning sequence |
US6721363B1 (en) | 1999-06-24 | 2004-04-13 | Intel Corporation | Receiver CODEC super set constellation generator |
US7203248B1 (en) | 1999-07-31 | 2007-04-10 | Broadcom Corporation | Impairment sensitive selection of constellation points for communication across a channel |
US7190727B1 (en) | 1999-07-31 | 2007-03-13 | Broadcom Corporation | Categorization of impairments affecting a communication channel |
EP1206865B1 (fr) * | 1999-07-31 | 2011-03-23 | AltoCom, Inc. | Sequence de compensation d'incidents et techniques correspondentes pour la communication de données |
US6721287B1 (en) * | 1999-09-09 | 2004-04-13 | Agere Systems Inc. | Far echo canceller for PCM modems |
US6839382B1 (en) * | 1999-10-29 | 2005-01-04 | International Business Machines Corporation | System, methods and computer program products for identifying digital impairments in modem signals using signature analysis and signal level comparison analysis |
EP1274193A1 (fr) * | 2001-07-04 | 2003-01-08 | TELEFONAKTIEBOLAGET L M ERICSSON (publ) | Procédé et dispositif pour mettre à disposition des informations de synchronisation dans un réseau de communication sans fil |
US20030212845A1 (en) * | 2002-05-07 | 2003-11-13 | Court John William | Method for high-speed data transfer across LDT and PCI buses |
US7299285B2 (en) * | 2002-05-15 | 2007-11-20 | Adc Dsl Systems, Inc. | Resource sharing with database synchronization |
US7706359B2 (en) * | 2002-07-01 | 2010-04-27 | Converged Data Solutions, Inc. | Systems and methods for voice and data communications including a network drop and insert interface for an external data routing resource |
WO2004004172A1 (fr) * | 2002-07-01 | 2004-01-08 | Nokia Corporation | Procede et appareil permettant d'etablir des constellations destinees a des informations d'etat de voie imparfaites au niveau d'un recepteur |
US7287412B2 (en) * | 2003-06-03 | 2007-10-30 | Nano-Proprietary, Inc. | Method and apparatus for sensing hydrogen gas |
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US7889804B2 (en) * | 2003-05-30 | 2011-02-15 | Mohammad Jaber Borran | Partially coherent constellations for multiple-antenna systems |
US20070240491A1 (en) * | 2003-06-03 | 2007-10-18 | Nano-Proprietary, Inc. | Hydrogen Sensor |
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EP1868340B1 (fr) * | 2006-06-12 | 2012-10-17 | Ali Corporation | Procédé de calcul d 'ordre dans un récépteur-QAM pour signaux modulés en quadrature |
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-
1998
- 1998-01-20 US US09/009,228 patent/US6023493A/en not_active Expired - Lifetime
-
1999
- 1999-01-19 DE DE69919982T patent/DE69919982T2/de not_active Expired - Lifetime
- 1999-01-19 EP EP99902328A patent/EP1050127B1/fr not_active Expired - Lifetime
- 1999-01-19 WO PCT/US1999/001005 patent/WO1999037051A2/fr active IP Right Grant
- 1999-06-07 US US09/326,910 patent/US6081567A/en not_active Expired - Fee Related
-
2001
- 2001-05-04 US US09/849,500 patent/USRE38678E1/en not_active Expired - Lifetime
- 2001-05-08 HK HK01103247A patent/HK1033870A1/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
US6081567A (en) | 2000-06-27 |
USRE38678E1 (en) | 2004-12-28 |
US6023493A (en) | 2000-02-08 |
EP1050127A2 (fr) | 2000-11-08 |
WO1999037051A3 (fr) | 2000-08-24 |
EP1050127B1 (fr) | 2004-09-08 |
DE69919982T2 (de) | 2005-09-29 |
DE69919982D1 (de) | 2004-10-14 |
WO1999037051A2 (fr) | 1999-07-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PC | Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee) |
Effective date: 20140119 |