BE473802A - - Google Patents

Info

Publication number
BE473802A
BE473802A BE473802DA BE473802A BE 473802 A BE473802 A BE 473802A BE 473802D A BE473802D A BE 473802DA BE 473802 A BE473802 A BE 473802A
Authority
BE
Belgium
Application number
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.)
Publication of BE473802A publication Critical patent/BE473802A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/04—Secret communication by frequency scrambling, i.e. by transposing or inverting parts of the frequency band or by inverting the whole band

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
BE473802D 1946-08-20 BE473802A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US691853A US2530824A (en) 1946-08-20 1946-08-20 Secret carrier signaling method and system

Publications (1)

Publication Number Publication Date
BE473802A true BE473802A (fr)

Family

ID=24778240

Family Applications (1)

Application Number Title Priority Date Filing Date
BE473802D BE473802A (fr) 1946-08-20

Country Status (4)

Country Link
US (1) US2530824A (fr)
BE (1) BE473802A (fr)
DE (1) DE822256C (fr)
FR (1) FR1014510A (fr)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH345670A (de) * 1954-02-12 1960-04-15 W C Dillon & Company Inc Trägerfrequenz-Nachrichtenübermittlungsanlage
US2812428A (en) * 1954-09-27 1957-11-05 Radio Patents Company Passive responder radio system
US4326292A (en) * 1960-03-18 1982-04-20 Lockheed Missiles & Space Company, Inc. Random energy communication system
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
US6061551A (en) 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for down-converting electromagnetic signals
US6542722B1 (en) 1998-10-21 2003-04-01 Parkervision, Inc. Method and system for frequency up-conversion with variety of transmitter configurations
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
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
US6370371B1 (en) 1998-10-21 2002-04-09 Parkervision, Inc. Applications of universal frequency translation
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
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
US7110435B1 (en) * 1999-03-15 2006-09-19 Parkervision, Inc. Spread spectrum applications of universal frequency translation
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
US7693230B2 (en) 1999-04-16 2010-04-06 Parkervision, Inc. Apparatus and method of differential IQ frequency up-conversion
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
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
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
US7072427B2 (en) 2001-11-09 2006-07-04 Parkervision, Inc. Method and apparatus for reducing DC offsets in a communication system
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

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1464096A (en) * 1920-08-28 1923-08-07 Western Electric Co Secret signaling
US1592940A (en) * 1920-09-09 1926-07-20 Western Electric Co Secret signaling
US1624601A (en) * 1923-07-02 1927-04-12 Western Electric Co Secret communication
US1762984A (en) * 1928-10-08 1930-06-10 Bell Telephone Labor Inc Secret-communicating system
US1992441A (en) * 1930-09-06 1935-02-26 John Hays Hammond Jr Single side band transmission and reception
BE516088A (fr) * 1937-08-11
US2407260A (en) * 1941-07-19 1946-09-10 Bell Telephone Labor Inc Privacy system
US2405599A (en) * 1941-09-24 1946-08-13 Bell Telephone Labor Inc Privacy system
NL63459C (fr) * 1943-04-05
US2393224A (en) * 1943-08-23 1946-01-15 Gysbert Frans Van Dissel Secret telecommunication

Also Published As

Publication number Publication date
DE822256C (de) 1951-11-22
US2530824A (en) 1950-11-21
FR1014510A (fr) 1952-08-18

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