GB817713A - Improvements relating to radio relays - Google Patents

Improvements relating to radio relays

Info

Publication number
GB817713A
GB817713A GB4091/56A GB409156A GB817713A GB 817713 A GB817713 A GB 817713A GB 4091/56 A GB4091/56 A GB 4091/56A GB 409156 A GB409156 A GB 409156A GB 817713 A GB817713 A GB 817713A
Authority
GB
United Kingdom
Prior art keywords
frequency
receiver
modulation components
signal
intermediate frequency
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
GB4091/56A
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Publication of GB817713A publication Critical patent/GB817713A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Relay Systems (AREA)

Abstract

817,713. Radio signalling; frequency-changing systems. COMPAGNIE FRANCAISE THOMSON-HOUSTON. Feb. 9,1956 [Feb. 11, 1955], No. 4091/56. Classes 40 (5) and 40 (6). A radio relay station comprises a superheterodyne receiver for receiving incoming signals at a frequency F + # F (where #F represents the modulation components) and means for applying said modulation components to a transmitter whose frequency is F - 2 f (where f is the intermediate frequency of said receiver), the heterodyne frequency for said receiver being obtained from a mixer, fed with a fraction of the transmitter output signal F - 2 f - AF and a fraction of the intermediate frequency signal of said receiver f + #F. The resulting heterodyne frequency F - f thus contains substantially no modulation components. This signal is mixed with said incoming signals F + #F to give the intermediate frequency f + #F.
GB4091/56A 1955-02-11 1956-02-09 Improvements relating to radio relays Expired GB817713A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1121655T 1955-02-11

Publications (1)

Publication Number Publication Date
GB817713A true GB817713A (en) 1959-08-06

Family

ID=9632195

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4091/56A Expired GB817713A (en) 1955-02-11 1956-02-09 Improvements relating to radio relays

Country Status (2)

Country Link
FR (1) FR1121655A (en)
GB (1) GB817713A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2404967A1 (en) * 1977-09-30 1979-04-27 Siemens Ag DUPLEX TRANSMISSION / RECEPTION DEVICE
FR2404966A1 (en) * 1977-09-30 1979-04-27 Siemens Ag MICROWAVE RADIOCOMMUNICATIONS DUPLEX SYSTEM
GB2122456A (en) * 1982-05-19 1984-01-11 Ronald R White Method of an apparatus for duplex communications

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2404967A1 (en) * 1977-09-30 1979-04-27 Siemens Ag DUPLEX TRANSMISSION / RECEPTION DEVICE
FR2404966A1 (en) * 1977-09-30 1979-04-27 Siemens Ag MICROWAVE RADIOCOMMUNICATIONS DUPLEX SYSTEM
GB2122456A (en) * 1982-05-19 1984-01-11 Ronald R White Method of an apparatus for duplex communications

Also Published As

Publication number Publication date
FR1121655A (en) 1956-08-23

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