GB1502363A - Data transmission system - Google Patents

Data transmission system

Info

Publication number
GB1502363A
GB1502363A GB487575A GB487575A GB1502363A GB 1502363 A GB1502363 A GB 1502363A GB 487575 A GB487575 A GB 487575A GB 487575 A GB487575 A GB 487575A GB 1502363 A GB1502363 A GB 1502363A
Authority
GB
United Kingdom
Prior art keywords
signal
elements
memory
phase
amplitude
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
GB487575A
Other languages
English (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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1502363A publication Critical patent/GB1502363A/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
    • H04L27/18—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
    • H04L27/2092—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner with digital generation of the modulated carrier (does not include the modulation of a digitally generated carrier)
    • 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
    • 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
    • H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
    • H04L27/2338—Demodulator circuits; Receiver circuits using non-coherent demodulation using sampling
    • 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
    • H04L27/389—Demodulator circuits; Receiver circuits with separate demodulation for the phase and amplitude components

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Dc Digital Transmission (AREA)
  • Filters And Equalizers (AREA)
GB487575A 1974-02-12 1975-02-05 Data transmission system Expired GB1502363A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7404772A FR2260904B1 (cg-RX-API-DMAC7.html) 1974-02-12 1974-02-12

Publications (1)

Publication Number Publication Date
GB1502363A true GB1502363A (en) 1978-03-01

Family

ID=9134830

Family Applications (1)

Application Number Title Priority Date Filing Date
GB487575A Expired GB1502363A (en) 1974-02-12 1975-02-05 Data transmission system

Country Status (4)

Country Link
JP (1) JPS558069B2 (cg-RX-API-DMAC7.html)
FR (1) FR2260904B1 (cg-RX-API-DMAC7.html)
GB (1) GB1502363A (cg-RX-API-DMAC7.html)
IT (1) IT1027871B (cg-RX-API-DMAC7.html)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3237619C2 (de) * 1982-10-11 1985-04-18 Karl Dipl.-Phys. Dr. 3550 Marburg Meinzer Verfahren und Vorrichtung zur digitalen Datenübertragung

Also Published As

Publication number Publication date
JPS558069B2 (cg-RX-API-DMAC7.html) 1980-03-01
DE2501324B2 (de) 1976-05-06
DE2501324A1 (de) 1975-08-14
IT1027871B (it) 1978-12-20
FR2260904A1 (cg-RX-API-DMAC7.html) 1975-09-05
JPS50125610A (cg-RX-API-DMAC7.html) 1975-10-02
FR2260904B1 (cg-RX-API-DMAC7.html) 1976-11-26

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee