DE3278664D1 - Fsk voiceband modem using digital filters - Google Patents

Fsk voiceband modem using digital filters

Info

Publication number
DE3278664D1
DE3278664D1 DE8282902614T DE3278664T DE3278664D1 DE 3278664 D1 DE3278664 D1 DE 3278664D1 DE 8282902614 T DE8282902614 T DE 8282902614T DE 3278664 T DE3278664 T DE 3278664T DE 3278664 D1 DE3278664 D1 DE 3278664D1
Authority
DE
Germany
Prior art keywords
fsk
digital filters
voiceband modem
voiceband
modem
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
Application number
DE8282902614T
Other languages
English (en)
Inventor
Michael K Stauffer
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.)
Advanced Micro Devices Inc
Original Assignee
Advanced Micro Devices Inc
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 Advanced Micro Devices Inc filed Critical Advanced Micro Devices Inc
Application granted granted Critical
Publication of DE3278664D1 publication Critical patent/DE3278664D1/de
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
DE8282902614T 1981-09-24 1982-07-23 Fsk voiceband modem using digital filters Expired DE3278664D1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/305,014 US4425665A (en) 1981-09-24 1981-09-24 FSK Voiceband modem using digital filters
PCT/US1982/001008 WO1983001166A1 (en) 1981-09-24 1982-07-23 Fsk voiceband modem using digital filters

Publications (1)

Publication Number Publication Date
DE3278664D1 true DE3278664D1 (de) 1988-07-14

Family

ID=23178934

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8282902614T Expired DE3278664D1 (de) 1981-09-24 1982-07-23 Fsk voiceband modem using digital filters

Country Status (5)

Country Link
US (1) US4425665A (de)
EP (1) EP0089343B1 (de)
DE (1) DE3278664D1 (de)
IT (1) IT1198405B (de)
WO (1) WO1983001166A1 (de)

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US4639933A (en) * 1983-12-14 1987-01-27 General Electric Company Steering logic circuit for a digital data transceiver
US4912723A (en) * 1984-06-28 1990-03-27 Westinghouse Electric Corp. Multipurpose digital IC for communication and control network
US4697281A (en) 1986-03-14 1987-09-29 Spectrum Cellular Communications Corporation, Inc. Cellular telephone data communication system and method
USRE37141E1 (en) 1984-09-10 2001-04-17 Spectrum Information Technologies, Inc. Cellular telephone data communication system and method
US4644561A (en) * 1985-03-20 1987-02-17 International Mobile Machines Corp. Modem for RF subscriber telephone system
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CA1307323C (en) * 1986-08-22 1992-09-08 Transcom Communications Systems Ltd Modem and data communication system
US5259000A (en) * 1987-08-26 1993-11-02 Hitachi, Ltd. Modulator-demodulator apparatus and system
GB2209648B (en) * 1987-09-10 1991-10-23 Ncr Co Modem communication system having main and secondary channels
US5115451A (en) * 1988-10-14 1992-05-19 Concord Communications, Inc. Local area network modem
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US5726893A (en) * 1992-12-17 1998-03-10 Stanford Telecommunications, Inc. Cellular telephone with voice-in-data modem
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US5729576A (en) * 1994-12-16 1998-03-17 Hughes Electronics Interference canceling receiver
US5550881A (en) * 1995-04-13 1996-08-27 Motorola, Inc. Automatic modulation mode selecting unit and method for modems
US6940840B2 (en) 1995-06-30 2005-09-06 Interdigital Technology Corporation Apparatus for adaptive reverse power control for spread-spectrum communications
US6487190B1 (en) * 1996-06-27 2002-11-26 Interdigital Technology Corporation Efficient multichannel filtering for CDMA modems
US6885652B1 (en) * 1995-06-30 2005-04-26 Interdigital Technology Corporation Code division multiple access (CDMA) communication system
US6788662B2 (en) 1995-06-30 2004-09-07 Interdigital Technology Corporation Method for adaptive reverse power control for spread-spectrum communications
US7123600B2 (en) * 1995-06-30 2006-10-17 Interdigital Technology Corporation Initial power control for spread-spectrum communications
US7020111B2 (en) * 1996-06-27 2006-03-28 Interdigital Technology Corporation System for using rapid acquisition spreading codes for spread-spectrum communications
US7072380B2 (en) * 1995-06-30 2006-07-04 Interdigital Technology Corporation Apparatus for initial power control for spread-spectrum communications
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US7929498B2 (en) * 1995-06-30 2011-04-19 Interdigital Technology Corporation Adaptive forward power control and adaptive reverse power control for spread-spectrum communications
US6816473B2 (en) 1995-06-30 2004-11-09 Interdigital Technology Corporation Method for adaptive forward power control for spread-spectrum communications
AU775460B2 (en) * 1996-06-07 2004-08-05 That Corporation BTSC encoder
US8908872B2 (en) * 1996-06-07 2014-12-09 That Corporation BTSC encoder
US5796842A (en) * 1996-06-07 1998-08-18 That Corporation BTSC encoder
US6118758A (en) * 1996-08-22 2000-09-12 Tellabs Operations, Inc. Multi-point OFDM/DMT digital communications system including remote service unit with improved transmitter architecture
US5790514A (en) * 1996-08-22 1998-08-04 Tellabs Operations, Inc. Multi-point OFDM/DMT digital communications system including remote service unit with improved receiver architecture
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US5940438A (en) 1997-02-18 1999-08-17 Mitsubishi Electric Information Technology Center America, Inc (Ita) Universal modem for digital video, audio and data communications
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US6091806A (en) * 1997-10-16 2000-07-18 International Business Machines Corporation Data processing system having a programmable modem and method therefor
US20020051434A1 (en) * 1997-10-23 2002-05-02 Ozluturk Fatih M. Method for using rapid acquisition spreading codes for spread-spectrum communications
ES2389626T3 (es) 1998-04-03 2012-10-29 Tellabs Operations, Inc. Filtro para acortamiento de respuesta al impulso, con restricciones espectrales adicionales, para transmisión de múltiples portadoras
US6631175B2 (en) * 1998-04-03 2003-10-07 Tellabs Operations, Inc. Spectrally constrained impulse shortening filter for a discrete multi-tone receiver
US7440498B2 (en) 2002-12-17 2008-10-21 Tellabs Operations, Inc. Time domain equalization for discrete multi-tone systems
US6490328B1 (en) * 1999-05-11 2002-12-03 Intel Corporation High speed data transceiver in harsh wiring networks
US6529868B1 (en) * 2000-03-28 2003-03-04 Tellabs Operations, Inc. Communication system noise cancellation power signal calculation techniques
DE10060425A1 (de) * 2000-12-05 2002-06-13 Infineon Technologies Ag Empfängerschaltung
US7590695B2 (en) 2003-05-09 2009-09-15 Aol Llc Managing electronic messages
US7739602B2 (en) 2003-06-24 2010-06-15 Aol Inc. System and method for community centric resource sharing based on a publishing subscription model
US7222158B2 (en) * 2003-12-31 2007-05-22 Aol Llc Third party provided transactional white-listing for filtering electronic communications
US7129753B2 (en) * 2004-05-26 2006-10-31 Infineon Technologies Ag Chip to chip interface
US20060149971A1 (en) * 2004-12-30 2006-07-06 Douglas Kozlay Apparatus, method, and system to determine identity and location of a user with an acoustic signal generator coupled into a user-authenticating fingerprint sensor
US7903772B2 (en) * 2005-02-04 2011-03-08 Broadcom Corporation Digital demodulator with improved hardware and power efficiency
US7583726B2 (en) * 2005-09-20 2009-09-01 Tyco Safety Products Canada Ltd. Frequency shift keying (FSK) data communications using voice modem
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4336613A (en) * 1977-06-30 1982-06-22 Texas Instruments Incorporated Charge coupled device filters and modems incorporating such filters

Also Published As

Publication number Publication date
EP0089343B1 (de) 1988-06-08
US4425665A (en) 1984-01-10
EP0089343A1 (de) 1983-09-28
EP0089343A4 (de) 1984-07-18
WO1983001166A1 (en) 1983-03-31
IT1198405B (it) 1988-12-21
IT8223422A0 (it) 1982-09-24

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition