BE787749A - Levee de l'ambiguite de phase dans les systemes de communications quadriphases a decalage de phase - Google Patents

Levee de l'ambiguite de phase dans les systemes de communications quadriphases a decalage de phase

Info

Publication number
BE787749A
BE787749A BE787749A BE787749A BE787749A BE 787749 A BE787749 A BE 787749A BE 787749 A BE787749 A BE 787749A BE 787749 A BE787749 A BE 787749A BE 787749 A BE787749 A BE 787749A
Authority
BE
Belgium
Prior art keywords
phase
quadri
shift
communications systems
lifting
Prior art date
Application number
BE787749A
Other languages
English (en)
Inventor
C J Wolejsza
E R Cacciamani
Original Assignee
Communications Satellite 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 Communications Satellite Corp filed Critical Communications Satellite Corp
Publication of BE787749A publication Critical patent/BE787749A/fr

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
    • H04L27/2053—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
BE787749A 1971-08-19 1972-08-18 Levee de l'ambiguite de phase dans les systemes de communications quadriphases a decalage de phase BE787749A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US17319171A 1971-08-19 1971-08-19

Publications (1)

Publication Number Publication Date
BE787749A true BE787749A (fr) 1972-12-18

Family

ID=22630908

Family Applications (1)

Application Number Title Priority Date Filing Date
BE787749A BE787749A (fr) 1971-08-19 1972-08-18 Levee de l'ambiguite de phase dans les systemes de communications quadriphases a decalage de phase

Country Status (11)

Country Link
US (1) US3736507A (fr)
JP (1) JPS5738064B2 (fr)
AU (1) AU461404B2 (fr)
BE (1) BE787749A (fr)
CA (1) CA970435A (fr)
DE (1) DE2240537C2 (fr)
FR (1) FR2149552B1 (fr)
GB (1) GB1399625A (fr)
IT (1) IT965115B (fr)
NL (1) NL175776C (fr)
SE (1) SE382898B (fr)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3931472A (en) * 1972-02-14 1976-01-06 Avantek, Inc. Asynchronous quadriphase communications system and method
US3838350A (en) * 1972-08-04 1974-09-24 Westinghouse Electric Corp Differential encoded quadriphase demodulator
US3984634A (en) * 1973-11-02 1976-10-05 The United States Of America Anti-multipath digital signal detector
JPS5518085B2 (fr) * 1974-08-14 1980-05-16
US3955141A (en) * 1974-10-18 1976-05-04 Intertel, Inc. Synchronizing circuit for modems in a data communications network
JPS5754980B2 (fr) * 1974-10-31 1982-11-20
IT1059262B (it) * 1975-04-08 1982-05-31 Licentia Gmbh Procedimento di ricezione della parola di codice
IT1062938B (it) * 1975-05-30 1985-02-11 Licentia Gmbh Procedimento di ricezione della parola di codice
JPS5650652A (en) * 1979-07-31 1981-05-07 Nec Corp Digital signal transmission system via multiphase/ multivalue modulation wave
JPS5643855A (en) * 1979-09-18 1981-04-22 Nec Corp Digital multilevel, multiphase modulation-demodulation system
FR2486741B1 (fr) * 1980-07-11 1988-03-11 Telecommunications Sa Procede et dispositif pour lever l'ambiguite de phase dans une liaison a modulation de phase quadrivalente
DE3125894C1 (de) * 1981-07-01 1982-11-04 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Digitales Signaluebertragungssystem,insbesondere fuer Satelliten-Rundfunk
JPS58194450A (ja) * 1982-05-07 1983-11-12 Nec Corp 復調装置
US4494239A (en) * 1982-05-26 1985-01-15 At&T Bell Laboratories Frame synchronization and phase ambiguity resolution in QAM transmission systems
US4594727A (en) * 1983-01-05 1986-06-10 Universal Data Systems Synchronous receiver
JPS60500555A (ja) * 1983-02-04 1985-04-18 マツクミツチエル　リミテツド 復調器
CH668873A5 (de) * 1985-07-15 1989-01-31 Bbc Brown Boveri & Cie Verfahren zur uebertragung digitaler daten.
JPS63245158A (ja) * 1987-03-31 1988-10-12 Nec Corp 位相偏移変調信号の受信回路
US5025455A (en) * 1989-11-30 1991-06-18 The United States Of America As Represented By The Administer, National Aeronautics And Space Administration Phase ambiguity resolution for offset QPSK modulation systems
US5299236A (en) * 1992-11-13 1994-03-29 Toshiba America Information Systems, Inc. System and method for obtaining and maintaining synchronization of a demodulated signal
JP2522144B2 (ja) * 1993-01-14 1996-08-07 日本電気株式会社 位相曖昧度除去回路
JP2513116B2 (ja) * 1993-03-19 1996-07-03 日本電気株式会社 位相曖昧度除去回路
US6487735B1 (en) * 1999-01-22 2002-12-03 Hill-Rom Services, Inc. Bed enclosure
JP3252820B2 (ja) 1999-02-24 2002-02-04 日本電気株式会社 復調及び変調回路並びに復調及び変調方法
GB2459478A (en) * 2008-04-23 2009-10-28 Audium Semiconductor Ltd Telecommunication System with simplified Receiver
US8594244B2 (en) * 2009-04-06 2013-11-26 Mediatek Inc. Data signal phase reversal correction method and system implementing the same

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3134855A (en) * 1960-10-07 1964-05-26 Bell Telephone Labor Inc Pulse communication system
US3307152A (en) * 1963-05-31 1967-02-28 Gen Electric Data transmission system with control character insertions
FR1390008A (fr) * 1964-04-16 1965-02-19 Philips Nv Dispositif récepteur pour impulsions modulant une onde porteuse par saut de phase
DE1222103B (de) * 1964-12-21 1966-08-04 Telefunken Patent Schaltungsanordnung zur Bildung der Phasendifferenz bei einem Datenuebertragungssystem mit quaternaerer Phasendifferenzumtastung
US3614623A (en) * 1969-04-21 1971-10-19 North American Rockwell Adaptive system for correction of distortion of signals in transmission of digital data

Also Published As

Publication number Publication date
JPS4830308A (fr) 1973-04-21
AU4571672A (en) 1974-02-21
NL175776C (nl) 1984-12-17
JPS5738064B2 (fr) 1982-08-13
FR2149552A1 (fr) 1973-03-30
DE2240537A1 (de) 1973-02-22
AU461404B2 (en) 1975-05-22
GB1399625A (en) 1975-07-02
SE382898B (sv) 1976-02-16
US3736507A (en) 1973-05-29
DE2240537C2 (de) 1982-04-15
NL7211350A (fr) 1973-02-21
NL175776B (nl) 1984-07-16
FR2149552B1 (fr) 1977-10-07
IT965115B (it) 1974-01-31
CA970435A (en) 1975-07-01

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Legal Events

Date Code Title Description
RE20 Patent expired

Owner name: COMMUNICATIONS SATELLITE CORPORATION

Effective date: 19920818