IT1198405B - Modulatore-demodulatore di banda fonica con selezione e deviazione di frequenza che utilizza filtri digitali - Google Patents

Modulatore-demodulatore di banda fonica con selezione e deviazione di frequenza che utilizza filtri digitali

Info

Publication number
IT1198405B
IT1198405B IT23422/82A IT2342282A IT1198405B IT 1198405 B IT1198405 B IT 1198405B IT 23422/82 A IT23422/82 A IT 23422/82A IT 2342282 A IT2342282 A IT 2342282A IT 1198405 B IT1198405 B IT 1198405B
Authority
IT
Italy
Prior art keywords
demodulator
deviation
frequency selection
digital filters
band modulator
Prior art date
Application number
IT23422/82A
Other languages
English (en)
Other versions
IT8223422A0 (it
Inventor
Michael K Stauffer
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
Publication of IT8223422A0 publication Critical patent/IT8223422A0/it
Application granted granted Critical
Publication of IT1198405B publication Critical patent/IT1198405B/it

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
IT23422/82A 1981-09-24 1982-09-24 Modulatore-demodulatore di banda fonica con selezione e deviazione di frequenza che utilizza filtri digitali IT1198405B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/305,014 US4425665A (en) 1981-09-24 1981-09-24 FSK Voiceband modem using digital filters

Publications (2)

Publication Number Publication Date
IT8223422A0 IT8223422A0 (it) 1982-09-24
IT1198405B true IT1198405B (it) 1988-12-21

Family

ID=23178934

Family Applications (1)

Application Number Title Priority Date Filing Date
IT23422/82A IT1198405B (it) 1981-09-24 1982-09-24 Modulatore-demodulatore di banda fonica con selezione e deviazione di frequenza che utilizza filtri digitali

Country Status (5)

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

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US4689801A (en) * 1983-10-11 1987-08-25 American Standard Inc. Microprocessor FSK data communications module
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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US5259000A (en) * 1987-08-26 1993-11-02 Hitachi, Ltd. Modulator-demodulator apparatus and system
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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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US7072380B2 (en) * 1995-06-30 2006-07-04 Interdigital Technology Corporation Apparatus for initial 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
US6487190B1 (en) 1996-06-27 2002-11-26 Interdigital Technology Corporation Efficient multichannel filtering for CDMA modems
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US20020051434A1 (en) * 1997-10-23 2002-05-02 Ozluturk Fatih M. Method for using rapid acquisition spreading codes for spread-spectrum communications
US7440498B2 (en) 2002-12-17 2008-10-21 Tellabs Operations, Inc. Time domain equalization for discrete multi-tone systems
US6631175B2 (en) * 1998-04-03 2003-10-07 Tellabs Operations, Inc. Spectrally constrained impulse shortening filter for a discrete multi-tone receiver
DK1068704T3 (da) 1998-04-03 2012-09-17 Tellabs Operations Inc Filter til impulssvarforkortning, med yderligere spektrale begrænsninger, til multibærebølgeoverførsel
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
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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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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
IT8223422A0 (it) 1982-09-24
US4425665A (en) 1984-01-10
WO1983001166A1 (en) 1983-03-31
EP0089343B1 (en) 1988-06-08
DE3278664D1 (de) 1988-07-14
EP0089343A4 (en) 1984-07-18
EP0089343A1 (en) 1983-09-28

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Legal Events

Date Code Title Description
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19960626