DE69513355T2 - Detektor für Trägerverlust in einem Faksimile-Modem - Google Patents

Detektor für Trägerverlust in einem Faksimile-Modem

Info

Publication number
DE69513355T2
DE69513355T2 DE69513355T DE69513355T DE69513355T2 DE 69513355 T2 DE69513355 T2 DE 69513355T2 DE 69513355 T DE69513355 T DE 69513355T DE 69513355 T DE69513355 T DE 69513355T DE 69513355 T2 DE69513355 T2 DE 69513355T2
Authority
DE
Germany
Prior art keywords
facsimile modem
loss detector
carrier loss
carrier
detector
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 - Fee Related
Application number
DE69513355T
Other languages
English (en)
Other versions
DE69513355D1 (de
Inventor
William Glass
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STMicroelectronics SA
Original Assignee
STMicroelectronics SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by STMicroelectronics SA filed Critical STMicroelectronics SA
Publication of DE69513355D1 publication Critical patent/DE69513355D1/de
Application granted granted Critical
Publication of DE69513355T2 publication Critical patent/DE69513355T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N1/327—Initiating, continuing or ending a single-mode communication; Handshaking therefor
DE69513355T 1994-09-14 1995-09-08 Detektor für Trägerverlust in einem Faksimile-Modem Expired - Fee Related DE69513355T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9411212A FR2724517B1 (fr) 1994-09-14 1994-09-14 Detecteur de perte de porteuse dans un modem de telecopieur

Publications (2)

Publication Number Publication Date
DE69513355D1 DE69513355D1 (de) 1999-12-23
DE69513355T2 true DE69513355T2 (de) 2000-06-08

Family

ID=9467101

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69513355T Expired - Fee Related DE69513355T2 (de) 1994-09-14 1995-09-08 Detektor für Trägerverlust in einem Faksimile-Modem

Country Status (4)

Country Link
US (1) US5815534A (de)
EP (1) EP0702481B1 (de)
DE (1) DE69513355T2 (de)
FR (1) FR2724517B1 (de)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6553518B1 (en) 1999-03-08 2003-04-22 International Business Machines Corporation Severe error detectors, methods and computer program products that use constellation specific error event thresholds to detect severe error events during demodulation of a signal comprising symbols from a plurality of symbol constellations
US6661847B1 (en) 1999-05-20 2003-12-09 International Business Machines Corporation Systems methods and computer program products for generating and optimizing signal constellations
US6823004B1 (en) 1999-10-29 2004-11-23 International Business Machines Corporation Methods, systems and computer program products for monitoring performance of a modem during a connection
US6611563B1 (en) 1999-10-29 2003-08-26 International Business Machines Corporation Systems, methods and computer program products for data mode refinement of modem constellation points
US6823017B1 (en) 1999-10-29 2004-11-23 International Business Machines Corporation Systems, methods and computer program products for filtering glitches from measured values in a sequence of code points
US6650657B1 (en) 1999-10-29 2003-11-18 International Business Machines Corporation Systems, methods and computer program products for identifying digital impairments in modem signals
US6792004B1 (en) 1999-10-29 2004-09-14 International Business Machines Corporation Systems, methods and computer program products for averaging learned levels in the presence of robbed-bit signaling based on proximity
US6816545B1 (en) 1999-10-29 2004-11-09 International Business Machines Corporation Systems, methods and computer program products for identifying digital impairments in modems based on clusters and/or skips in pulse code modulation signal levels
US6662322B1 (en) 1999-10-29 2003-12-09 International Business Machines Corporation Systems, methods, and computer program products for controlling the error rate in a communication device by adjusting the distance between signal constellation points
US6754258B1 (en) 1999-10-29 2004-06-22 International Business Machines Corporation Systems, methods and computer program products for averaging learned levels in the presence of digital impairments based on patterns
US6765955B1 (en) 1999-10-29 2004-07-20 International Business Machines Corporation Methods, systems and computer program products establishing a communication configuration for a modem connection to compensate for echo noise
US6826157B1 (en) 1999-10-29 2004-11-30 International Business Machines Corporation Systems, methods, and computer program products for controlling data rate reductions in a communication device by using a plurality of filters to detect short-term bursts of errors and long-term sustainable errors
US6792040B1 (en) 1999-10-29 2004-09-14 International Business Machines Corporation Modems having a dual power mode capability and methods of operating same
US6505222B1 (en) 1999-10-29 2003-01-07 International Business Machines Corporation Systems methods and computer program products for controlling undesirable bias in an equalizer
US6452966B1 (en) * 2000-01-19 2002-09-17 Charles Industries, Ltd. Digital signal carrier detector
US8131238B2 (en) * 2008-03-20 2012-03-06 Infineon Technologies Ag Carrier signal detection
US10200163B1 (en) * 2017-08-22 2019-02-05 Texas Instruments Incorporated Small and seamless carrier detector

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3990048A (en) * 1973-11-23 1976-11-02 Xerox Corporation Carrier detect circuit
US4387401A (en) * 1979-05-30 1983-06-07 Rca Corporation Carrier detector apparatus useful in a multiband sweep type tuning system
US4554508A (en) * 1983-12-07 1985-11-19 American Microsystems, Incorporated Carrier detection circuit
JPS636935A (ja) * 1986-06-26 1988-01-12 Toshiba Corp プリアンブル検出回路
US5181226A (en) * 1989-03-06 1993-01-19 Raytheon Company Threshold level generator
US5596418A (en) * 1990-08-17 1997-01-21 Samsung Electronics Co., Ltd. Deemphasis and subsequent reemphasis of high-energy reversed-spectrum components of a folded video signal
US5260974A (en) * 1991-05-10 1993-11-09 Echelon Corporation Adaptive carrier detection
JPH0614062A (ja) * 1992-06-25 1994-01-21 Mitsubishi Electric Corp キャリア検出器
JPH06244878A (ja) * 1993-02-18 1994-09-02 Fujitsu Ltd 変復調装置
US5598441A (en) * 1994-10-13 1997-01-28 Westinghouse Electric Corp. Carrier acquisition technique for mobile radio QPSK demodulator

Also Published As

Publication number Publication date
EP0702481B1 (de) 1999-11-17
FR2724517B1 (fr) 1996-12-13
EP0702481A1 (de) 1996-03-20
DE69513355D1 (de) 1999-12-23
FR2724517A1 (fr) 1996-03-15
US5815534A (en) 1998-09-29

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee