GB1022598A - Improvements in or relating to receivers for binary-coded signals - Google Patents

Improvements in or relating to receivers for binary-coded signals

Info

Publication number
GB1022598A
GB1022598A GB4120963A GB4120963A GB1022598A GB 1022598 A GB1022598 A GB 1022598A GB 4120963 A GB4120963 A GB 4120963A GB 4120963 A GB4120963 A GB 4120963A GB 1022598 A GB1022598 A GB 1022598A
Authority
GB
United Kingdom
Prior art keywords
signal
frequency
signals
received
limiter
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
GB4120963A
Inventor
John Eldred Linton Candler
Toni Gartell
John Holland
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB4120963A priority Critical patent/GB1022598A/en
Priority to FR991770A priority patent/FR1415898A/en
Priority to NL6412092A priority patent/NL6412092A/xx
Publication of GB1022598A publication Critical patent/GB1022598A/en
Expired legal-status Critical Current

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
    • H04L27/14—Demodulator circuits; Receiver circuits
    • H04L27/144—Demodulator circuits; Receiver circuits with demodulation using spectral properties of the received signal, e.g. by using frequency selective- or frequency sensitive elements
    • 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
    • H04L27/14—Demodulator circuits; Receiver circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

1,022,598. Data transmission. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Oct. 20, 1964 [Oct. 18, 1963], No. 41209/63. Heading H4P. To reduce the effects of noise in a receiver in which a limiter feeds a frequency discriminator, the limiter is supplied by the received signal and by a locally generated signal having the same frequency as one of those to which the discriminator responds. In one embodiment, Mark and Space signals are received in frequency shift form. One frequency, say f 2 , is filtered out; the resultant gaps in the f 1 signal contain noise which may simulate f 1 at the discriminator. To prevent this a signal of frequency f 2 is added to the filtered signal, the added signal having an amplitude less than that of the received signals f 1 but greater than the noise level. The limiter which receives the combined signal, responding to the predominating signals, provides clean square signals at f 1 and f 2 . The received signals may be amplitude modulated. Reference is also made to a twinplex system. The local oscillator.-Fig. 3 comprises a transistor oscillator fed by a stabilized voltage, derived across Zener diode 11 from a D.C. source at 10, and by a varying voltage, derived by rectification of the filter output f 1 , fed in at 6. The amplitude of the generated oscillations f 2 thus varies within the limits specified above.
GB4120963A 1963-10-18 1963-10-18 Improvements in or relating to receivers for binary-coded signals Expired GB1022598A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB4120963A GB1022598A (en) 1963-10-18 1963-10-18 Improvements in or relating to receivers for binary-coded signals
FR991770A FR1415898A (en) 1963-10-18 1964-10-16 Improvements to binary code signal receivers
NL6412092A NL6412092A (en) 1963-10-18 1964-10-16

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4120963A GB1022598A (en) 1963-10-18 1963-10-18 Improvements in or relating to receivers for binary-coded signals

Publications (1)

Publication Number Publication Date
GB1022598A true GB1022598A (en) 1966-03-16

Family

ID=10418623

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4120963A Expired GB1022598A (en) 1963-10-18 1963-10-18 Improvements in or relating to receivers for binary-coded signals

Country Status (3)

Country Link
FR (1) FR1415898A (en)
GB (1) GB1022598A (en)
NL (1) NL6412092A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2472878A1 (en) * 1979-12-27 1981-07-03 Thomson Csf CIRCUIT FOR DEMODULATION OF A SIGNAL MODULATED BY DIGITAL INFORMATION AND RECEIVER COMPRISING SUCH A CIRCUIT
EP0093819A1 (en) * 1982-04-29 1983-11-16 Ascom Autophon Ag System for the radio transmission of a binary coded signal

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0052970B1 (en) * 1980-11-21 1985-03-13 Black & Decker Inc. Bearing support arrangement for an electric machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2472878A1 (en) * 1979-12-27 1981-07-03 Thomson Csf CIRCUIT FOR DEMODULATION OF A SIGNAL MODULATED BY DIGITAL INFORMATION AND RECEIVER COMPRISING SUCH A CIRCUIT
EP0031746A2 (en) * 1979-12-27 1981-07-08 Thomson-Csf Circuit for the demodulation of a signal modulated by digital information and receiver comprising such a circuit
EP0031746A3 (en) * 1979-12-27 1981-07-22 Thomson-Csf Circuit for the demodulation of a signal modulated by digital information and receiver comprising such a circuit
EP0093819A1 (en) * 1982-04-29 1983-11-16 Ascom Autophon Ag System for the radio transmission of a binary coded signal

Also Published As

Publication number Publication date
FR1415898A (en) 1965-10-29
NL6412092A (en) 1965-04-20

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