ZA72848B - Improvements in or relating to data transmission - Google Patents

Improvements in or relating to data transmission

Info

Publication number
ZA72848B
ZA72848B ZA720848A ZA72848A ZA72848B ZA 72848 B ZA72848 B ZA 72848B ZA 720848 A ZA720848 A ZA 720848A ZA 72848 A ZA72848 A ZA 72848A ZA 72848 B ZA72848 B ZA 72848B
Authority
ZA
South Africa
Prior art keywords
relating
data transmission
transmission
data
Prior art date
Application number
ZA720848A
Inventor
B Monahan
Original Assignee
Standard Telephones Cables Ltd
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 Standard Telephones Cables Ltd filed Critical Standard Telephones Cables Ltd
Publication of ZA72848B publication Critical patent/ZA72848B/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
    • H04L27/2035—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using a single or unspecified number of carriers
    • 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
    • H04B1/60—Supervising unattended repeaters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4904—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using self-synchronising codes, e.g. split-phase codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
    • H04L27/2275—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses the received modulated signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/02—Speed or phase control by the received code signals, the signals containing no special synchronisation information
    • H04L7/027—Speed or phase control by the received code signals, the signals containing no special synchronisation information extracting the synchronising or clock signal from the received signal spectrum, e.g. by using a resonant or bandpass circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Time-Division Multiplex Systems (AREA)
ZA720848A 1971-03-08 1972-02-09 Improvements in or relating to data transmission ZA72848B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB623871 1971-03-08

Publications (1)

Publication Number Publication Date
ZA72848B true ZA72848B (en) 1972-10-25

Family

ID=9810924

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA720848A ZA72848B (en) 1971-03-08 1972-02-09 Improvements in or relating to data transmission

Country Status (3)

Country Link
CH (1) CH546517A (en)
GB (1) GB1333951A (en)
ZA (1) ZA72848B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2459529A1 (en) * 1979-06-18 1981-01-09 Cii Honeywell Bull METHOD AND DEVICE FOR DIGITAL MAGNETIC RECORDING WITH HIGH FREQUENCY POLARIZATION
FR2469063B1 (en) * 1979-10-31 1987-10-23 Brossard Pierre BINARY MODULATIONS WITH PHASE DISPLACEMENT AND MODULATORS
GB8808613D0 (en) * 1988-04-12 1988-05-11 Renishaw Plc Signal transmission system for machine tools inspection machines &c

Also Published As

Publication number Publication date
CH546517A (en) 1974-02-28
GB1333951A (en) 1973-10-17

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