GB480847A - Improvements in or relating to suppressed carrier wave signalling systems - Google Patents

Improvements in or relating to suppressed carrier wave signalling systems

Info

Publication number
GB480847A
GB480847A GB20089/37A GB2008937A GB480847A GB 480847 A GB480847 A GB 480847A GB 20089/37 A GB20089/37 A GB 20089/37A GB 2008937 A GB2008937 A GB 2008937A GB 480847 A GB480847 A GB 480847A
Authority
GB
United Kingdom
Prior art keywords
frequencies
frequency
synchronizing
carrier
synchronizing frequencies
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
GB20089/37A
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Publication of GB480847A publication Critical patent/GB480847A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/30—Circuits for homodyne or synchrodyne receivers
    • H04B1/302—Circuits for homodyne or synchrodyne receivers for single sideband receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/68—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for wholly or partially suppressing the carrier or one side band
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/06—Arrangements for supplying the carrier waves ; Arrangements for supplying synchronisation signals
    • H04J1/065—Synchronisation of carrier sources at the receiving station with the carrier source at the transmitting station

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)

Abstract

480,847. Wireless signalling systems. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE. July 20, 1937, No. 20089. Convention date, July 20, 1936. [Class 40 (v)] In a suppressed carrier system in which preferably only a single sideband is transmitted the carrier is, before suppression at the transmitter, modulated with two synchronizing frequencies in a predetermined ratio. At the receiver the resultant two synchronizing frequencies are compared to give an indication or used to control the local carrier generator. The synchronizing frequencies may be 25 and 50 cycles per second when a small error in the re-supplied carrier will produce a large change in the ratio of the frequencies. The frequencies may be multiplied so as to be equal and applied to a phase measuring bridge circuit or may be used to control synchronous motors. At the transmitter the synchronizing frequencies may be obtained from one another or from a third frequency by multiplication or division of frequency. The synchronizing frequencies may lie outside the frequency limits of the signal or be inserted in frequency gaps in the signal.
GB20089/37A 1936-07-20 1937-07-20 Improvements in or relating to suppressed carrier wave signalling systems Expired GB480847A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE480847X 1936-07-20

Publications (1)

Publication Number Publication Date
GB480847A true GB480847A (en) 1938-03-01

Family

ID=6542593

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20089/37A Expired GB480847A (en) 1936-07-20 1937-07-20 Improvements in or relating to suppressed carrier wave signalling systems

Country Status (2)

Country Link
GB (1) GB480847A (en)
NL (1) NL50108C (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2530614A (en) * 1943-10-21 1950-11-21 Hartford Nat Bank & Trust Co Transmitter and receiver for single-sideband signals
US2530926A (en) * 1944-04-22 1950-11-21 Radio Electr Soc Fr Short-wave, long distance communication system
US2724742A (en) * 1951-05-05 1955-11-22 Bell Telephone Labor Inc Suppressed-carrier amplitude modulation
US3001068A (en) * 1957-08-12 1961-09-19 Nippon Electric Co F.m. reception system of high sensitivity
US3182259A (en) * 1961-01-06 1965-05-04 Floyd P Holder Submodulation systems for carrier recreation and doppler correction in single-sideband zero-carrier communications
US3311828A (en) * 1963-02-12 1967-03-28 Internat Microwave Corp Communication system, methods, and apparatus utilizing vestigial-sideband, suppressed-carrier p.c.m. signals
US3571717A (en) * 1967-10-06 1971-03-23 Ibm Dual pilot control for re-phasing a signal carrier
FR2382808A1 (en) * 1977-03-03 1978-09-29 Licentia Gmbh RADIO HARNESS FOR SINGLE SIDE BAND OPERATION
US4217661A (en) * 1975-10-14 1980-08-12 Kahn Leonard R Audio signal transmission system and method incorporating automatic frequency correction
US4829588A (en) * 1981-08-25 1989-05-09 Harris Corporation Automatic retransmission with pilot tone

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2530614A (en) * 1943-10-21 1950-11-21 Hartford Nat Bank & Trust Co Transmitter and receiver for single-sideband signals
US2530926A (en) * 1944-04-22 1950-11-21 Radio Electr Soc Fr Short-wave, long distance communication system
US2724742A (en) * 1951-05-05 1955-11-22 Bell Telephone Labor Inc Suppressed-carrier amplitude modulation
US3001068A (en) * 1957-08-12 1961-09-19 Nippon Electric Co F.m. reception system of high sensitivity
US3182259A (en) * 1961-01-06 1965-05-04 Floyd P Holder Submodulation systems for carrier recreation and doppler correction in single-sideband zero-carrier communications
US3311828A (en) * 1963-02-12 1967-03-28 Internat Microwave Corp Communication system, methods, and apparatus utilizing vestigial-sideband, suppressed-carrier p.c.m. signals
US3571717A (en) * 1967-10-06 1971-03-23 Ibm Dual pilot control for re-phasing a signal carrier
US4217661A (en) * 1975-10-14 1980-08-12 Kahn Leonard R Audio signal transmission system and method incorporating automatic frequency correction
FR2382808A1 (en) * 1977-03-03 1978-09-29 Licentia Gmbh RADIO HARNESS FOR SINGLE SIDE BAND OPERATION
US4209748A (en) * 1977-03-03 1980-06-24 Licentia Patent-Verwaltungs-G.M.B.H. Directional radio system for single sideband operation
US4829588A (en) * 1981-08-25 1989-05-09 Harris Corporation Automatic retransmission with pilot tone

Also Published As

Publication number Publication date
NL50108C (en)

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