CA2069944A1 - Methode et appareil de transmission, via des liaisons optiques, de signaux radiofrequence a large bande modules en amplitude - Google Patents

Methode et appareil de transmission, via des liaisons optiques, de signaux radiofrequence a large bande modules en amplitude

Info

Publication number
CA2069944A1
CA2069944A1 CA2069944A CA2069944A CA2069944A1 CA 2069944 A1 CA2069944 A1 CA 2069944A1 CA 2069944 A CA2069944 A CA 2069944A CA 2069944 A CA2069944 A CA 2069944A CA 2069944 A1 CA2069944 A1 CA 2069944A1
Authority
CA
Canada
Prior art keywords
radio frequency
modulated radio
octave
bandwidth
frequency signals
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.)
Granted
Application number
CA2069944A
Other languages
English (en)
Other versions
CA2069944C (fr
Inventor
Rezin E. Pidgeon, Jr.
Frank Little
Leo Thompson
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.)
Scientific Atlanta LLC
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2069944A1 publication Critical patent/CA2069944A1/fr
Application granted granted Critical
Publication of CA2069944C publication Critical patent/CA2069944C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/22—Adaptations for optical transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H04B10/501—Structural aspects
    • H04B10/503—Laser transmitters
    • H04B10/504—Laser transmitters using direct modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H04B10/501—Structural aspects
    • H04B10/506—Multiwavelength transmitters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0298—Wavelength-division multiplex systems with sub-carrier multiplexing [SCM]

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Multimedia (AREA)
  • Optical Communication System (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
CA002069944A 1989-12-04 1990-11-21 Methode et appareil de transmission, via des liaisons optiques, de signaux radiofrequence a large bande modules en amplitude Expired - Fee Related CA2069944C (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US446,461 1989-12-04
US07/446,461 US5191459A (en) 1989-12-04 1989-12-04 Method and apparatus for transmitting broadband amplitude modulated radio frequency signals over optical links

Publications (2)

Publication Number Publication Date
CA2069944A1 true CA2069944A1 (fr) 1991-06-05
CA2069944C CA2069944C (fr) 1996-08-13

Family

ID=23772670

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002069944A Expired - Fee Related CA2069944C (fr) 1989-12-04 1990-11-21 Methode et appareil de transmission, via des liaisons optiques, de signaux radiofrequence a large bande modules en amplitude

Country Status (10)

Country Link
US (3) US5191459A (fr)
EP (1) EP0507799B1 (fr)
JP (1) JPH05502563A (fr)
AT (1) ATE167968T1 (fr)
AU (1) AU647065B2 (fr)
CA (1) CA2069944C (fr)
DE (1) DE69032454T2 (fr)
DK (1) DK0507799T3 (fr)
ES (1) ES2118748T3 (fr)
WO (1) WO1991008631A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114070429A (zh) * 2021-10-28 2022-02-18 中国电子科技集团公司第二十九研究所 一种射频内外校正相结合的方法及计算机存储介质

Families Citing this family (107)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5262883A (en) * 1989-12-01 1993-11-16 Scientific-Atlanta, Inc. CATV distribution networks using light wave transmission lines
US5191459A (en) * 1989-12-04 1993-03-02 Scientific-Atlanta, Inc. Method and apparatus for transmitting broadband amplitude modulated radio frequency signals over optical links
US5892773A (en) * 1990-04-10 1999-04-06 The United States Of America As Represented By The Secretary Of The Navy Radio frequency cable to optical fiber cable converter/interface
AU661339B2 (en) * 1991-09-03 1995-07-20 Scientific-Atlanta, Inc. Fiber optic status monitor and control system
US5267071A (en) * 1991-09-03 1993-11-30 Scientific-Atlanta, Inc. Signal level control circuitry for a fiber communications system
DE9111173U1 (de) * 1991-09-09 1991-12-05 AEG KABEL AG, 4050 Mönchengladbach Anordnung zum Zusammenführen von elektrischen Hochfrequenz-Signalen
JPH05292040A (ja) * 1992-04-08 1993-11-05 Hitachi Ltd 光伝送システムの構築方法
US5373389A (en) * 1992-10-27 1994-12-13 General Instrument Corporation Method for linearizing an unbalanced Mach Zehnder optical frequency discriminator
US5430568A (en) * 1992-12-01 1995-07-04 Scientific-Atlanta, Inc. Optical communications system for transmitting information signals having different wavelengths over a same optical fiber
US5459506A (en) * 1993-12-28 1995-10-17 At&T Corp. Enhanced pay per view system
JPH0846594A (ja) * 1994-07-28 1996-02-16 Nec Corp 光信号伝送装置
US6334219B1 (en) 1994-09-26 2001-12-25 Adc Telecommunications Inc. Channel selection for a hybrid fiber coax network
USRE42236E1 (en) 1995-02-06 2011-03-22 Adc Telecommunications, Inc. Multiuse subcarriers in multipoint-to-point communication using orthogonal frequency division multiplexing
US7280564B1 (en) 1995-02-06 2007-10-09 Adc Telecommunications, Inc. Synchronization techniques in multipoint-to-point communication using orthgonal frequency division multiplexing
US6031432A (en) * 1997-02-28 2000-02-29 Schreuders; Ronald C. Balancing apparatus for signal transmissions
US5745838A (en) * 1997-03-14 1998-04-28 Tresness Irrevocable Patent Trust Return path filter
US5999796A (en) * 1997-03-14 1999-12-07 Tresness Irrevocable Patent Trust Return path attenuation filter
US6137780A (en) 1997-08-07 2000-10-24 At&T Corp Apparatus and method to monitor communication system status
US7184428B1 (en) 1997-12-31 2007-02-27 At&T Corp. Facility management platform for a hybrid coaxial/twisted pair local loop network service architecture
US7076168B1 (en) * 1998-02-12 2006-07-11 Aquity, Llc Method and apparatus for using multicarrier interferometry to enhance optical fiber communications
US5969581A (en) * 1998-05-28 1999-10-19 The United States Of America As Represented By The Secretary Of The Navy Opto-electronically controlled RF waveguide
US7515896B1 (en) 1998-10-21 2009-04-07 Parkervision, Inc. Method and system for down-converting an electromagnetic signal, and transforms for same, and aperture relationships
US6091940A (en) 1998-10-21 2000-07-18 Parkervision, Inc. Method and system for frequency up-conversion
US6061551A (en) 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for down-converting electromagnetic signals
US6694128B1 (en) 1998-08-18 2004-02-17 Parkervision, Inc. Frequency synthesizer using universal frequency translation technology
US6618407B1 (en) 1998-08-27 2003-09-09 Triquint Technology Holding Co. Uncooled universal laser module
US6370371B1 (en) 1998-10-21 2002-04-09 Parkervision, Inc. Applications of universal frequency translation
US6542722B1 (en) 1998-10-21 2003-04-01 Parkervision, Inc. Method and system for frequency up-conversion with variety of transmitter configurations
US6813485B2 (en) 1998-10-21 2004-11-02 Parkervision, Inc. Method and system for down-converting and up-converting an electromagnetic signal, and transforms for same
US7295826B1 (en) 1998-10-21 2007-11-13 Parkervision, Inc. Integrated frequency translation and selectivity with gain control functionality, and applications thereof
US6560301B1 (en) 1998-10-21 2003-05-06 Parkervision, Inc. Integrated frequency translation and selectivity with a variety of filter embodiments
US6049706A (en) 1998-10-21 2000-04-11 Parkervision, Inc. Integrated frequency translation and selectivity
US7039372B1 (en) 1998-10-21 2006-05-02 Parkervision, Inc. Method and system for frequency up-conversion with modulation embodiments
US6061555A (en) 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for ensuring reception of a communications signal
US7321735B1 (en) 1998-10-21 2008-01-22 Parkervision, Inc. Optical down-converter using universal frequency translation technology
US7236754B2 (en) 1999-08-23 2007-06-26 Parkervision, Inc. Method and system for frequency up-conversion
US6763193B1 (en) * 1998-12-16 2004-07-13 Lucent Technologies Inc. Optical communication system optically combining both baseband and passband signals
US7006805B1 (en) 1999-01-22 2006-02-28 Parker Vision, Inc. Aliasing communication system with multi-mode and multi-band functionality and embodiments thereof, such as the family radio service
US6704549B1 (en) 1999-03-03 2004-03-09 Parkvision, Inc. Multi-mode, multi-band communication system
US6704558B1 (en) 1999-01-22 2004-03-09 Parkervision, Inc. Image-reject down-converter and embodiments thereof, such as the family radio service
US6879817B1 (en) 1999-04-16 2005-04-12 Parkervision, Inc. DC offset, re-radiation, and I/Q solutions using universal frequency translation technology
US6853690B1 (en) * 1999-04-16 2005-02-08 Parkervision, Inc. Method, system and apparatus for balanced frequency up-conversion of a baseband signal and 4-phase receiver and transceiver embodiments
US6873836B1 (en) 1999-03-03 2005-03-29 Parkervision, Inc. Universal platform module and methods and apparatuses relating thereto enabled by universal frequency translation technology
US7110435B1 (en) 1999-03-15 2006-09-19 Parkervision, Inc. Spread spectrum applications of universal frequency translation
US7693230B2 (en) 1999-04-16 2010-04-06 Parkervision, Inc. Apparatus and method of differential IQ frequency up-conversion
US7110444B1 (en) 1999-08-04 2006-09-19 Parkervision, Inc. Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments and circuit implementations
US7065162B1 (en) * 1999-04-16 2006-06-20 Parkervision, Inc. Method and system for down-converting an electromagnetic signal, and transforms for same
US6353490B1 (en) * 1999-05-12 2002-03-05 Quintech, Inc. C/N performance of broadband two-way transmission of RF signals over transmission mediums with limited bandwidth
US6850710B1 (en) 2000-06-09 2005-02-01 Tip Group, Llc Method and apparatus of utilizing RF/microwave and optical mixing techniques to select a given band of an optical transmission
CN1223115C (zh) * 1999-06-10 2005-10-12 光纤空间有限公司 利用rf/微波和光混频技术来选择光传输的指定频带的方法
US8295406B1 (en) 1999-08-04 2012-10-23 Parkervision, Inc. Universal platform module for a plurality of communication protocols
US7054296B1 (en) 1999-08-04 2006-05-30 Parkervision, Inc. Wireless local area network (WLAN) technology and applications including techniques of universal frequency translation
US7072390B1 (en) 1999-08-04 2006-07-04 Parkervision, Inc. Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments
US7082171B1 (en) 1999-11-24 2006-07-25 Parkervision, Inc. Phase shifting applications of universal frequency translation
US6963734B2 (en) 1999-12-22 2005-11-08 Parkervision, Inc. Differential frequency down-conversion using techniques of universal frequency translation technology
US7292835B2 (en) 2000-01-28 2007-11-06 Parkervision, Inc. Wireless and wired cable modem applications of universal frequency translation technology
US7010286B2 (en) 2000-04-14 2006-03-07 Parkervision, Inc. Apparatus, system, and method for down-converting and up-converting electromagnetic signals
US7554508B2 (en) 2000-06-09 2009-06-30 Parker Vision, Inc. Phased array antenna applications on universal frequency translation
WO2002017534A1 (fr) * 2000-08-25 2002-02-28 Centerpoint Broadband Technologies, Inc. Systeme terminal a fibres optiques utilisant le multiplexage de sous-porteuses pour le transport de donnees optiques a haute capacite
US7454453B2 (en) 2000-11-14 2008-11-18 Parkervision, Inc. Methods, systems, and computer program products for parallel correlation and applications thereof
US7010559B2 (en) 2000-11-14 2006-03-07 Parkervision, Inc. Method and apparatus for a parallel correlator and applications thereof
US8670390B2 (en) 2000-11-22 2014-03-11 Genghiscomm Holdings, LLC Cooperative beam-forming in wireless networks
US10931338B2 (en) 2001-04-26 2021-02-23 Genghiscomm Holdings, LLC Coordinated multipoint systems
US10355720B2 (en) 2001-04-26 2019-07-16 Genghiscomm Holdings, LLC Distributed software-defined radio
US9819449B2 (en) 2002-05-14 2017-11-14 Genghiscomm Holdings, LLC Cooperative subspace demultiplexing in content delivery networks
US7072427B2 (en) 2001-11-09 2006-07-04 Parkervision, Inc. Method and apparatus for reducing DC offsets in a communication system
US7085335B2 (en) 2001-11-09 2006-08-01 Parkervision, Inc. Method and apparatus for reducing DC offsets in a communication system
US20030152386A1 (en) * 2001-12-04 2003-08-14 Vohra Sandeep T. Efficient multi-format optical transport of broadband signals for DWDM cable TV networks
US6485198B1 (en) * 2001-12-12 2002-11-26 Industrial Technology Research Institute Optoelectronic transceiver having integrated optical and electronic components
US10644916B1 (en) 2002-05-14 2020-05-05 Genghiscomm Holdings, LLC Spreading and precoding in OFDM
US10142082B1 (en) 2002-05-14 2018-11-27 Genghiscomm Holdings, LLC Pre-coding in OFDM
US10200227B2 (en) 2002-05-14 2019-02-05 Genghiscomm Holdings, LLC Pre-coding in multi-user MIMO
US9628231B2 (en) 2002-05-14 2017-04-18 Genghiscomm Holdings, LLC Spreading and precoding in OFDM
US6975848B2 (en) 2002-06-04 2005-12-13 Parkervision, Inc. Method and apparatus for DC offset removal in a radio frequency communication channel
US7321640B2 (en) 2002-06-07 2008-01-22 Parkervision, Inc. Active polyphase inverter filter for quadrature signal generation
US20030235415A1 (en) * 2002-06-21 2003-12-25 Peters Frank H. Optical communication devices and optical communication methods
US7460584B2 (en) 2002-07-18 2008-12-02 Parkervision, Inc. Networking methods and systems
US7379883B2 (en) 2002-07-18 2008-05-27 Parkervision, Inc. Networking methods and systems
US6784760B2 (en) * 2002-11-06 2004-08-31 John Mezzalingua Associates, Inc. Step attenuator using frequency dependent components and method of effecting signal attenuation
TWI280690B (en) * 2003-03-18 2007-05-01 Tdk Corp Electronic device for wireless communications and reflector device for wireless communication cards
EP1608104B1 (fr) * 2004-06-15 2008-08-13 Dublin Institute of Technology Drahtloses Probensystem für dahtlose lokale Netzwerke
US11184037B1 (en) 2004-08-02 2021-11-23 Genghiscomm Holdings, LLC Demodulating and decoding carrier interferometry signals
US11552737B1 (en) 2004-08-02 2023-01-10 Genghiscomm Holdings, LLC Cooperative MIMO
US11381285B1 (en) 2004-08-02 2022-07-05 Genghiscomm Holdings, LLC Transmit pre-coding
US7848661B2 (en) * 2005-03-15 2010-12-07 Emcore Corporation Directly modulated laser optical transmission system with phase modulation
USRE44647E1 (en) * 2005-03-15 2013-12-17 Emcore Corporation Directly modulated laser optical transmission system with phase modulation
US7792432B2 (en) * 2006-03-02 2010-09-07 Emcore Corporation Externally modulated laser optical transmission system with feed forward noise cancellation
US7881621B2 (en) * 2006-03-02 2011-02-01 Emcore Corporation Optical transmission system with directly modulated laser and feed forward noise cancellation
US8103801B1 (en) * 2007-09-28 2012-01-24 Emc Corporation Marking and faulting input/output ports of an electronics system
ES2369685A1 (es) * 2010-01-29 2011-12-05 Televes, S.A. Equipo de cabecera para distribución de señales de telecomunicación en redes de fibra óptica.
US20130156431A1 (en) * 2010-12-28 2013-06-20 Chen-Kuo Sun System and method for multiple sub-octave band transmissions
US8463124B2 (en) * 2010-12-28 2013-06-11 Titan Photonics, Inc. Passive optical network with sub-octave transmission
KR20130085498A (ko) * 2011-12-12 2013-07-30 한국전자통신연구원 다채널 송신용 광 모듈
US20140226973A1 (en) * 2013-02-11 2014-08-14 Peter H. Wolff System and Method for Isolating RF Signals for Transmission Over Multiple Channels on a Single Transmission Path
US11246328B2 (en) 2013-07-03 2022-02-15 The Coca-Cola Company Systems and methods for automatically coring, or isolating fiber or whole juice sacs from citrus fruit
US12224860B1 (en) 2014-01-30 2025-02-11 Genghiscomm Holdings, LLC Linear coding in decentralized networks
US9378353B2 (en) * 2014-08-07 2016-06-28 Verizon Patent And Licensing Inc. Methods and systems for determining a user identity by analysis of reflected radio frequency signals received by an antenna array
US9344192B1 (en) 2014-11-20 2016-05-17 Integra Research And Development, Llc Driver chip for minimizing transmission impairments and for boosting signal transmission rates
KR102191374B1 (ko) * 2016-11-22 2020-12-16 한국전자통신연구원 광 송신 모듈
US10187149B2 (en) 2017-05-05 2019-01-22 Cisco Technology, Inc. Downstream node setup
US10243773B1 (en) 2017-06-30 2019-03-26 Genghiscomm Holdings, LLC Efficient peak-to-average-power reduction for OFDM and MIMO-OFDM
US10637705B1 (en) 2017-05-25 2020-04-28 Genghiscomm Holdings, LLC Peak-to-average-power reduction for OFDM multiple access
US11343823B2 (en) 2020-08-16 2022-05-24 Tybalt, Llc Orthogonal multiple access and non-orthogonal multiple access
US12206535B1 (en) 2018-06-17 2025-01-21 Tybalt, Llc Artificial neural networks in wireless communication systems
US11917604B2 (en) 2019-01-25 2024-02-27 Tybalt, Llc Orthogonal multiple access and non-orthogonal multiple access
EP3915236A4 (fr) 2019-01-25 2023-05-24 Genghiscomm Holdings, LLC Accès multiple orthogonal, et accès multiple non orthogonal
WO2020242898A1 (fr) 2019-05-26 2020-12-03 Genghiscomm Holdings, LLC Accès multiple non orthogonal

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3535640A (en) * 1966-06-16 1970-10-20 Anaconda Wire & Cable Co Reduction of distortion and losses in cable television distribution systems
US3704419A (en) * 1971-01-14 1972-11-28 Anaconda Astrodata Co Automatic compensation of cable television systems
US4236243A (en) * 1978-04-20 1980-11-25 National Research Development Corporation Telecommunication systems
DE3045876A1 (de) * 1980-12-05 1982-07-08 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Dienstintegriertes, digitales uebertragungssystem
GB2109197B (en) * 1981-10-13 1985-12-04 Standard Telephones Cables Ltd Radio system
US4545075A (en) * 1981-11-18 1985-10-01 Times Fiber Communications, Inc. Satellite block transmission using wideband fiber optic links
US4709418A (en) * 1983-09-14 1987-11-24 British Telecommunications Public Limited Company Wideband cable network
JPS616942A (ja) * 1984-06-21 1986-01-13 Tokyo Keiki Co Ltd 光多重通信方式
DE3528252A1 (de) * 1985-08-07 1987-02-12 Standard Elektrik Lorenz Ag Faseroptische verteileranlage fuer breitbandige signale
JPS62100037A (ja) * 1985-10-28 1987-05-09 Hitachi Ltd 光伝送方式
US4959862A (en) * 1988-04-28 1990-09-25 Catel Telecommunications, Inc. Active multichannel video processing hub for optimum transition from fiber to coax
US4953156A (en) * 1988-09-08 1990-08-28 Gte Laboratories, Incorporated Wideband subcarrier multiplexed optical communication system operating over more than one octave
JPH0286384A (ja) * 1988-09-22 1990-03-27 Pioneer Electron Corp 動画像情報サービスシステム及び該システム用ヘッドエンド装置
US5016242A (en) * 1988-11-01 1991-05-14 Gte Laboratories Incorporated Microwave subcarrier generation for fiber optic systems
US4891694A (en) * 1988-11-21 1990-01-02 Bell Communications Research, Inc. Fiber optic cable television distribution system
US5153763A (en) * 1989-12-01 1992-10-06 Scientific-Atlanta, Inc. CATV distribution networks using light wave transmission lines
US5191459A (en) * 1989-12-04 1993-03-02 Scientific-Atlanta, Inc. Method and apparatus for transmitting broadband amplitude modulated radio frequency signals over optical links

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114070429A (zh) * 2021-10-28 2022-02-18 中国电子科技集团公司第二十九研究所 一种射频内外校正相结合的方法及计算机存储介质

Also Published As

Publication number Publication date
AU647065B2 (en) 1994-03-17
US5379141A (en) 1995-01-03
EP0507799A1 (fr) 1992-10-14
ES2118748T3 (es) 1998-10-01
DE69032454T2 (de) 1999-03-25
ATE167968T1 (de) 1998-07-15
JPH05502563A (ja) 1993-04-28
EP0507799A4 (en) 1993-06-09
US5191459A (en) 1993-03-02
DK0507799T3 (da) 1998-10-26
US5500758A (en) 1996-03-19
DE69032454D1 (de) 1998-08-06
EP0507799B1 (fr) 1998-07-01
WO1991008631A1 (fr) 1991-06-13
CA2069944C (fr) 1996-08-13
AU6914491A (en) 1991-06-26

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