GB2009541B - Method and apparatus for synchronising waveforms - Google Patents

Method and apparatus for synchronising waveforms

Info

Publication number
GB2009541B
GB2009541B GB7849527A GB7849527A GB2009541B GB 2009541 B GB2009541 B GB 2009541B GB 7849527 A GB7849527 A GB 7849527A GB 7849527 A GB7849527 A GB 7849527A GB 2009541 B GB2009541 B GB 2009541B
Authority
GB
United Kingdom
Prior art keywords
synchronising
waveforms
synchronising waveforms
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
GB7849527A
Other versions
GB2009541A (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.)
Post Office
Original Assignee
Post Office
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 Post Office filed Critical Post Office
Priority to GB7849527A priority Critical patent/GB2009541B/en
Publication of GB2009541A publication Critical patent/GB2009541A/en
Application granted granted Critical
Publication of GB2009541B publication Critical patent/GB2009541B/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
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits
    • H04L27/3818—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers
    • H04L27/3836—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers in which the carrier is recovered using the received modulated signal or the received IF signal, e.g. by detecting a pilot or by frequency multiplication
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08—Details of the phase-locked loop
    • H03L7/099—Details of the phase-locked loop concerning mainly the controlled oscillator of the loop
    • H03L7/0991—Details of the phase-locked loop concerning mainly the controlled oscillator of the loop the oscillator being a digital oscillator, e.g. composed of a fixed oscillator followed by a variable frequency divider
    • H03L7/0992—Details of the phase-locked loop concerning mainly the controlled oscillator of the loop the oscillator being a digital oscillator, e.g. composed of a fixed oscillator followed by a variable frequency divider comprising a counter or a frequency divider

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
GB7849527A 1977-09-21 1978-12-21 Method and apparatus for synchronising waveforms Expired GB2009541B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7849527A GB2009541B (en) 1977-09-21 1978-12-21 Method and apparatus for synchronising waveforms

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3937377 1977-09-21
GB7849527A GB2009541B (en) 1977-09-21 1978-12-21 Method and apparatus for synchronising waveforms

Publications (2)

Publication Number Publication Date
GB2009541A GB2009541A (en) 1979-06-13
GB2009541B true GB2009541B (en) 1982-07-28

Family

ID=26264082

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7849527A Expired GB2009541B (en) 1977-09-21 1978-12-21 Method and apparatus for synchronising waveforms

Country Status (1)

Country Link
GB (1) GB2009541B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2967698D1 (en) * 1979-10-15 1990-09-27 Acec METHOD AND DEVICE FOR TRANSMITTING PERIODIC ELECTRICAL SIGNALS WITH A VERY LOW FREQUENCY ERROR TOLERANCE.

Also Published As

Publication number Publication date
GB2009541A (en) 1979-06-13

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee