GB519264A - Improvements in or relating to multi-carrier transmission systems - Google Patents

Improvements in or relating to multi-carrier transmission systems

Info

Publication number
GB519264A
GB519264A GB29358/38A GB2935838A GB519264A GB 519264 A GB519264 A GB 519264A GB 29358/38 A GB29358/38 A GB 29358/38A GB 2935838 A GB2935838 A GB 2935838A GB 519264 A GB519264 A GB 519264A
Authority
GB
United Kingdom
Prior art keywords
band
pass filter
relating
transmission systems
carrier transmission
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
GB29358/38A
Other languages
English (en)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Priority to GB29358/38A priority Critical patent/GB519264A/en
Priority to US298331A priority patent/US2270385A/en
Priority to BE436617D priority patent/BE436617A/xx
Priority to CH212071D priority patent/CH212071A/de
Priority to FR860788D priority patent/FR860788A/fr
Publication of GB519264A publication Critical patent/GB519264A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/12—Arrangements for reducing cross-talk between channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/04—Frequency-transposition arrangements
    • H04J1/045—Filters applied to frequency transposition

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Transmitters (AREA)
GB29358/38A 1938-10-10 1938-10-10 Improvements in or relating to multi-carrier transmission systems Expired GB519264A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB29358/38A GB519264A (en) 1938-10-10 1938-10-10 Improvements in or relating to multi-carrier transmission systems
US298331A US2270385A (en) 1938-10-10 1939-10-06 Multicarrier transmission system
BE436617D BE436617A (hu) 1938-10-10 1939-10-07
CH212071D CH212071A (de) 1938-10-10 1939-10-09 Anlage für mehrfache Trägerwellenübertragung.
FR860788D FR860788A (fr) 1938-10-10 1939-10-10 Système de transmission d'ondes porteuses à plusieurs canalisations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB29358/38A GB519264A (en) 1938-10-10 1938-10-10 Improvements in or relating to multi-carrier transmission systems

Publications (1)

Publication Number Publication Date
GB519264A true GB519264A (en) 1940-03-20

Family

ID=10158969

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29358/38A Expired GB519264A (en) 1938-10-10 1938-10-10 Improvements in or relating to multi-carrier transmission systems

Country Status (5)

Country Link
US (1) US2270385A (hu)
BE (1) BE436617A (hu)
CH (1) CH212071A (hu)
FR (1) FR860788A (hu)
GB (1) GB519264A (hu)

Families Citing this family (55)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB595712A (en) * 1943-08-02 1947-12-15 Comm Engineering Pty Ltd Multi-channel telephone systems
US3991273A (en) * 1943-10-04 1976-11-09 Bell Telephone Laboratories, Incorporated Speech component coded multiplex carrier wave transmission
GB615922A (en) * 1945-05-02 1949-01-13 Philips Nv Improvements in multiplex carrier-wave telephony
BE479409A (hu) * 1945-05-15
US2444534A (en) * 1946-02-01 1948-07-06 Farnsworth Res Corp Single side-band modulation system
BE475938A (hu) * 1946-04-08
US2607853A (en) * 1947-01-27 1952-08-19 British Telecomm Res Ltd Telecommunication system
US2775646A (en) * 1950-11-30 1956-12-25 Hartford Nat Bank & Trust Co Single-sideband apparatus
NL185193B (nl) * 1953-02-18 Arnold L & C Bedtafelblad voor ziekenhuisnachtkastjes.
US3068454A (en) * 1959-01-30 1962-12-11 Zack D Reynolds Method of recording a multiple of electrical signals
DE1274663C2 (de) * 1965-05-24 1980-09-18 Siemens Ag Aufbau der grundprimaergruppe eines einseitenband-traegerfrequenzsystems ueber eine vormodulationsstufe
WO1985000944A1 (en) * 1983-08-16 1985-02-28 The Variable Speech Control Company ("Vsc") Audio channel stacking with speech compression for narrow band transmission with provision for dialed calls
US4586174A (en) * 1983-08-16 1986-04-29 The Variable Speech Control Company ("Vsc") Audio channel stacking with speech compression for narrow band transmission with provision for dialed calls
US6061551A (en) 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for down-converting electromagnetic signals
US6091940A (en) * 1998-10-21 2000-07-18 Parkervision, Inc. Method and system for frequency up-conversion
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
US6694128B1 (en) 1998-08-18 2004-02-17 Parkervision, Inc. Frequency synthesizer using universal frequency translation technology
US6560301B1 (en) 1998-10-21 2003-05-06 Parkervision, Inc. Integrated frequency translation and selectivity with a variety of filter embodiments
US6061555A (en) 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for ensuring reception of a communications signal
US6370371B1 (en) 1998-10-21 2002-04-09 Parkervision, Inc. Applications of universal frequency translation
US7295826B1 (en) 1998-10-21 2007-11-13 Parkervision, Inc. Integrated frequency translation and selectivity with gain control functionality, and applications thereof
US7236754B2 (en) 1999-08-23 2007-06-26 Parkervision, Inc. Method and system for frequency up-conversion
US6542722B1 (en) 1998-10-21 2003-04-01 Parkervision, Inc. Method and system for frequency up-conversion with variety of transmitter configurations
US6049706A (en) 1998-10-21 2000-04-11 Parkervision, Inc. Integrated frequency translation and selectivity
US7321735B1 (en) 1998-10-21 2008-01-22 Parkervision, Inc. Optical down-converter using universal frequency translation technology
US7039372B1 (en) 1998-10-21 2006-05-02 Parkervision, Inc. Method and system for frequency up-conversion with modulation embodiments
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
US6804825B1 (en) * 1998-11-30 2004-10-12 Microsoft Corporation Video on demand methods and systems
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
US6704558B1 (en) 1999-01-22 2004-03-09 Parkervision, Inc. Image-reject down-converter 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
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
US6879817B1 (en) 1999-04-16 2005-04-12 Parkervision, Inc. DC offset, re-radiation, and I/Q solutions using universal frequency translation technology
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
US7065162B1 (en) 1999-04-16 2006-06-20 Parkervision, Inc. Method and system for down-converting an electromagnetic signal, and transforms for same
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
US7072390B1 (en) 1999-08-04 2006-07-04 Parkervision, Inc. Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments
US7054296B1 (en) 1999-08-04 2006-05-30 Parkervision, Inc. Wireless local area network (WLAN) technology and applications including techniques of universal frequency translation
US8295406B1 (en) 1999-08-04 2012-10-23 Parkervision, Inc. Universal platform module for a plurality of communication protocols
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
US7010559B2 (en) * 2000-11-14 2006-03-07 Parkervision, Inc. Method and apparatus for a parallel correlator and applications thereof
US7454453B2 (en) * 2000-11-14 2008-11-18 Parkervision, Inc. Methods, systems, and computer program products for parallel correlation and applications thereof
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
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
US7379883B2 (en) * 2002-07-18 2008-05-27 Parkervision, Inc. Networking methods and systems
US7460584B2 (en) * 2002-07-18 2008-12-02 Parkervision, Inc. Networking methods and systems
TWI280690B (en) * 2003-03-18 2007-05-01 Tdk Corp Electronic device for wireless communications and reflector device for wireless communication cards

Also Published As

Publication number Publication date
CH212071A (de) 1940-10-31
BE436617A (hu) 1939-11-30
FR860788A (fr) 1941-01-31
US2270385A (en) 1942-01-20

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