FR2279278A1 - Systeme de transmission, par modulation d'une porteuse, d'un train de signaux unipolaires - Google Patents

Systeme de transmission, par modulation d'une porteuse, d'un train de signaux unipolaires

Info

Publication number
FR2279278A1
FR2279278A1 FR7522476A FR7522476A FR2279278A1 FR 2279278 A1 FR2279278 A1 FR 2279278A1 FR 7522476 A FR7522476 A FR 7522476A FR 7522476 A FR7522476 A FR 7522476A FR 2279278 A1 FR2279278 A1 FR 2279278A1
Authority
FR
France
Prior art keywords
modulation
carrier
transmission system
signal train
unipolar signal
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.)
Granted
Application number
FR7522476A
Other languages
English (en)
Other versions
FR2279278B1 (fr
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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
Priority claimed from JP49083576A external-priority patent/JPS5225683B2/ja
Priority claimed from JP4499975A external-priority patent/JPS51120110A/ja
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Publication of FR2279278A1 publication Critical patent/FR2279278A1/fr
Application granted granted Critical
Publication of FR2279278B1 publication Critical patent/FR2279278B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C5/00—Amplitude modulation and angle modulation produced simultaneously or at will by the same modulating signal
    • 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
    • H04L27/36—Modulator circuits; Transmitter circuits
    • H04L27/361—Modulation using a single or unspecified number of carriers, e.g. with separate stages of phase and amplitude modulation
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00095—Systems or arrangements for the transmission of the picture signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/41—Bandwidth or redundancy reduction

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Facsimile Transmission Control (AREA)
  • Facsimiles In General (AREA)
FR7522476A 1974-07-19 1975-07-18 Systeme de transmission, par modulation d'une porteuse, d'un train de signaux unipolaires Granted FR2279278A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP49083576A JPS5225683B2 (fr) 1974-07-19 1974-07-19
JP4499975A JPS51120110A (en) 1975-04-12 1975-04-12 Band compression and modulation system

Publications (2)

Publication Number Publication Date
FR2279278A1 true FR2279278A1 (fr) 1976-02-13
FR2279278B1 FR2279278B1 (fr) 1977-12-09

Family

ID=26384957

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7522476A Granted FR2279278A1 (fr) 1974-07-19 1975-07-18 Systeme de transmission, par modulation d'une porteuse, d'un train de signaux unipolaires

Country Status (4)

Country Link
US (1) US4166923A (fr)
DE (1) DE2532287C2 (fr)
FR (1) FR2279278A1 (fr)
GB (1) GB1519972A (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4404532A (en) * 1978-09-29 1983-09-13 Communications Satellite Corporation Modulator having improved bandwidth and power requirements
FR2571193A1 (fr) * 1981-12-28 1986-04-04 Lmt Radio Professionelle Emetteur et recepteur de messages constitues d'impulsions successives modulant une porteuse a frequence fixe
WO2001035318A2 (fr) * 1999-11-09 2001-05-17 Checkpoint Systems, Inc. Processeur d'impulsion efficace de largeur de bande pour la communication de donnees d'identification de frequences radio
CN107409110B (zh) * 2015-03-12 2021-04-02 瑞典爱立信有限公司 无线电通信网络中的多点传送和接收
EP3272018B1 (fr) 2015-03-16 2020-06-24 Telefonaktiebolaget LM Ericsson (publ) Transmission et réception multipoint dans un réseau de communication radio

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2708268A (en) * 1951-03-16 1955-05-10 Products And Licensing Corp Sequential phase-shifted amplitude modulated carrier wave
GB918583A (fr) * 1958-03-27 1900-01-01
US3341776A (en) * 1964-01-13 1967-09-12 Collins Radio Co Error sensitive binary transmission system wherein four channels are transmitted via one carrier wave
FR1403768A (fr) * 1964-05-12 1965-06-25 Cit Alcatel Télégraphie à modulation trivalente
GB1125043A (en) * 1966-02-02 1968-08-28 Post Office Radio telegraph signal transmission
US3524023A (en) * 1966-07-14 1970-08-11 Milgo Electronic Corp Band limited telephone line data communication system
US3497618A (en) * 1966-08-19 1970-02-24 Digicom Inc Binary data transmission system with switching between positive and negative sinusoids at binary transition points
US3715474A (en) * 1967-12-26 1973-02-06 Ibm Color video recording and playback system
US3564412A (en) * 1968-03-01 1971-02-16 Milgo Electronic Corp Derived clock from carrier envelope
US3643023A (en) * 1968-03-01 1972-02-15 Milgo Electronic Corp Differential phase modulator and demodulator utilizing relative phase differences at the center of the modulation periods
US3619503A (en) * 1969-11-18 1971-11-09 Int Communications Corp Phase and amplitude modulated modem
JPS5038488B1 (fr) * 1970-08-14 1975-12-10
US3761610A (en) * 1971-02-16 1973-09-25 Graphics Sciences Inc High speed fascimile systems
US3943285A (en) * 1973-05-10 1976-03-09 Milgo Electronic Corporation Multiplexed data modem

Also Published As

Publication number Publication date
DE2532287A1 (de) 1976-02-12
GB1519972A (en) 1978-08-02
FR2279278B1 (fr) 1977-12-09
DE2532287C2 (de) 1982-06-03
US4166923A (en) 1979-09-04

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Legal Events

Date Code Title Description
TP Transmission of property