BE651389A - - Google Patents

Info

Publication number
BE651389A
BE651389A BE651389A BE651389A BE651389A BE 651389 A BE651389 A BE 651389A BE 651389 A BE651389 A BE 651389A BE 651389 A BE651389 A BE 651389A BE 651389 A BE651389 A BE 651389A
Authority
BE
Belgium
Application number
BE651389A
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 filed Critical
Publication of BE651389A publication Critical patent/BE651389A/xx

Links

Classifications

    • 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
    • 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
    • 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
    • H04L25/4917—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 multilevel codes
    • H04L25/4923—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 multilevel codes using ternary 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
    • H04L27/20—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
    • H04L27/2053—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 more than one carrier, e.g. carriers with different phases
    • H04L27/206—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 more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers
    • H04L27/2067—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 more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states
    • H04L27/2071—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 more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states in which the data are represented by the carrier phase, e.g. systems with differential coding
    • 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
BE651389A 1963-08-23 1964-08-04 BE651389A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR945536A FR1381314A (fr) 1963-08-23 1963-08-23 Procédés de synchronisation pour transmettre des signaux digitaux à travers des dispositifs de transmission non synchrone

Publications (1)

Publication Number Publication Date
BE651389A true BE651389A (fr) 1965-02-04

Family

ID=8811086

Family Applications (1)

Application Number Title Priority Date Filing Date
BE651389A BE651389A (fr) 1963-08-23 1964-08-04

Country Status (8)

Country Link
US (1) US3378770A (fr)
BE (1) BE651389A (fr)
CH (1) CH426928A (fr)
DE (1) DE1274635B (fr)
FR (1) FR1381314A (fr)
GB (1) GB1024095A (fr)
NL (1) NL142852B (fr)
SE (1) SE318599B (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3522537A (en) * 1966-07-25 1970-08-04 Western Union Telegraph Co Vestigial sideband transmission system having two channels in quadrature
US4103234A (en) * 1967-11-24 1978-07-25 General Dynamics Corp. System for transmission storage and/or multiplexing of information
NL6800093A (fr) * 1968-01-03 1969-07-07
US3962639A (en) * 1973-06-11 1976-06-08 The United States Of America As Represented By The Secretary Of The Navy System for reducing radio communication frequency bandwidth and increasing number of channels available
FR2309089A1 (fr) * 1975-04-25 1976-11-19 Ibm France Procede pour synchroniser l'horloge du recepteur d'un systeme de transmission de donnees et dispositif pour mettre en oeuvre le procede
GB1561643A (en) * 1975-08-05 1980-02-27 Marconi Co Ltd Phaseshift-keying modulators
FR2445078A1 (fr) * 1978-12-20 1980-07-18 Ibm France Procede et dispositif pour detecter une sequence pseudo-aleatoire de deux symboles dans un recepteur de donnees utilisant une modulation a double bande laterale-porteuses en quadrature
FR2445079A1 (fr) * 1978-12-20 1980-07-18 Ibm France Procede et dispositif pour detecter une sequence pseudo-aleatoire de changements de phase de 0o et 180o de la porteuse dans un recepteur de donnees
EP0533887B1 (fr) * 1991-03-13 1998-10-21 Motorola, Inc. Procede et appareil servant a accueillir un nombre variable de canaux de communication dans un systeme de communication a etalement de spectre

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE628642A (fr) * 1962-02-19
NL292264A (fr) * 1962-05-07
US3307152A (en) * 1963-05-31 1967-02-28 Gen Electric Data transmission system with control character insertions

Also Published As

Publication number Publication date
SE318599B (fr) 1969-12-15
NL6409439A (fr) 1965-02-24
GB1024095A (en) 1966-03-30
US3378770A (en) 1968-04-16
DE1274635B (de) 1968-08-08
CH426928A (de) 1966-12-31
NL142852B (nl) 1974-07-15
FR1381314A (fr) 1964-12-14

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