FR2417888A1 - Demodulateur pour signal a modulation de phase a plusieurs niveaux - Google Patents

Demodulateur pour signal a modulation de phase a plusieurs niveaux

Info

Publication number
FR2417888A1
FR2417888A1 FR7905094A FR7905094A FR2417888A1 FR 2417888 A1 FR2417888 A1 FR 2417888A1 FR 7905094 A FR7905094 A FR 7905094A FR 7905094 A FR7905094 A FR 7905094A FR 2417888 A1 FR2417888 A1 FR 2417888A1
Authority
FR
France
Prior art keywords
elements
local oscillator
signal
modulation signal
phase modulation
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.)
Withdrawn
Application number
FR7905094A
Other languages
English (en)
Inventor
Gregers Evald Mogensen
Evald Mogensen Gregers
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi Co 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 Marconi Co Ltd filed Critical Marconi Co Ltd
Publication of FR2417888A1 publication Critical patent/FR2417888A1/fr
Withdrawn legal-status Critical Current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
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
    • H04L27/2332—Demodulator circuits; Receiver circuits using non-coherent demodulation using a non-coherent carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0024—Carrier regulation at the receiver end
    • H04L2027/0026—Correction of carrier offset
    • H04L2027/003—Correction of carrier offset at baseband only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0046—Open loops
    • H04L2027/0048—Frequency multiplication

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

L'invention concerne un démodulateur destiné à être utilisé avec un signal à modulation de phase à plusieurs niveaux. Il comprend une borne d'entrée 1 reliée à un diviseur de puissance 2 qui attaque deux mélangeurs 3 et 4. L'autre entrée des diviseurs est alimentée par un oscillateur local 5. Les sorties de 3 et 4 attaquent respectivement des filtres passe-bas 6 et 7, alimentant eux-mêmes un multiplicateur de fréquence 8. Ce dernier alimente deux autres filtres passe-bas 9 et 10 attaquant eux-mêmes un diviseur de fréquente 11. Les signaux résultant de la division sont appliqués à des mélangeurs 12 et 13, où ils sont mélangés avec le signal de l'oscillateur local 5. Les éléments 4 et 13, où ils sont mélangés avec le signal de l'oscillateur local 5. Les éléments 4 et 13 sont alimentés par 5 directement tandis que les éléments 3 et 12 le sont après un déphasage de 90 degrés . Les sorties de 12 et 13 sont appliquées à un circuit de combinaison 14 à la borne de sortie 15 duquel la fréquence porteuse est recouvrée. Application dans la transmission multiplexée d'informations.
FR7905094A 1978-02-17 1979-02-19 Demodulateur pour signal a modulation de phase a plusieurs niveaux Withdrawn FR2417888A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB6302/78A GB1553654A (en) 1978-02-17 1978-02-17 Marconi co ltd

Publications (1)

Publication Number Publication Date
FR2417888A1 true FR2417888A1 (fr) 1979-09-14

Family

ID=9812024

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7905094A Withdrawn FR2417888A1 (fr) 1978-02-17 1979-02-19 Demodulateur pour signal a modulation de phase a plusieurs niveaux

Country Status (5)

Country Link
US (1) US4318049A (fr)
DE (1) DE2820943C3 (fr)
FR (1) FR2417888A1 (fr)
GB (1) GB1553654A (fr)
NL (1) NL7901243A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984004425A1 (fr) * 1983-04-25 1984-11-08 Inst Microtechnique De L Unive Cellule photovoltaique de grande surface et son procede de fabrication
EP0527481A1 (fr) * 1991-08-12 1993-02-17 Fujitsu Limited Circuit convertisseur de fréquence
EP0533191A2 (fr) * 1991-09-19 1993-03-24 Nec Corporation Démodulateur de phase, à multiplication de fréquence, pour la correction d'erreurs de phase et de fréquence

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2431795A1 (fr) * 1978-07-18 1980-02-15 Telecommunications Sa Demodulateur numerique a niveaux de phase
JPS5676637A (en) * 1979-11-29 1981-06-24 Fujitsu Ltd Phase synchronizing circuit
US4439737A (en) * 1982-04-21 1984-03-27 Rca Corporation Phase locked loop, as for MPSK signal detector
US4516079A (en) * 1983-02-09 1985-05-07 Westinghouse Electric Corp. Coherent phase shift keyed demodulator for power line communication systems
US4514697A (en) * 1983-02-09 1985-04-30 Westinghouse Electric Corp. Coherent phase shift keyed demodulator with improved sampling apparatus and method
JPS60154758A (ja) * 1984-01-25 1985-08-14 Alps Electric Co Ltd Ｐｓｋ復調装置
US4653071A (en) * 1984-05-10 1987-03-24 Zenith Electronics Corporation Carrier recovery circuit for PSK communication system
US5732359A (en) * 1994-05-13 1998-03-24 Westinghouse Electric Corporation Mobile terminal apparatus and method having network inter-operability
US5742639A (en) * 1994-05-13 1998-04-21 Westinghouse Electric Corporation Mobile terminal apparatus and method for a satellite communication system
US5579345A (en) * 1994-10-13 1996-11-26 Westinghouse Electric Corporation Carrier tracking loop for QPSK demodulator
US5768323A (en) * 1994-10-13 1998-06-16 Westinghouse Electric Corporation Symbol synchronizer using modified early/punctual/late gate technique
US5539772A (en) * 1994-10-13 1996-07-23 Westinghouse Electric Corporation Apparatus and method for verifying performance of RF receiver
US5937004A (en) * 1994-10-13 1999-08-10 Fasulo, Ii; Albert Joseph Apparatus and method for verifying performance of digital processing board of an RF receiver
US5684835A (en) * 1994-10-13 1997-11-04 Westinghouse Electric Corporation Locally coherent QPSK detection with differential decoding for a fading channel
US5598441A (en) * 1994-10-13 1997-01-28 Westinghouse Electric Corp. Carrier acquisition technique for mobile radio QPSK demodulator
US5523726A (en) * 1994-10-13 1996-06-04 Westinghouse Electric Corporation Digital quadriphase-shift keying modulator
US5517535A (en) * 1994-10-13 1996-05-14 Westinghouse Electric Corp. Numerically controlled oscillator with complex exponential outputs using recursion technique
US5930687A (en) * 1996-09-30 1999-07-27 Usa Digital Radio Partners, L.P. Apparatus and method for generating an AM-compatible digital broadcast waveform
US6128334A (en) * 1997-02-21 2000-10-03 Usa Digital Radio, Inc. Receiver addressable AM compatible digital broadcast system
US5878089A (en) * 1997-02-21 1999-03-02 Usa Digital Radio Partners, L.P. Coherent signal detector for AM-compatible digital audio broadcast waveform recovery
EP1189338A1 (fr) * 2000-09-06 2002-03-20 Sony International (Europe) GmbH Démodulateur I/Q à trois détecteurs de puissance et deux convertisseurs A/N
AU2003290052A1 (en) * 2002-12-17 2004-07-09 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for quadrature modulation technical field

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2138849A1 (de) * 1970-08-03 1972-02-10 Fujitsu Ltd Schaltung zur Trägerwellenrückgewinnung
DE2216259A1 (de) * 1972-04-05 1973-10-18 Licentia Gmbh Schaltungsanordnung zum ableiten der traegerfrequenz aus den empfangenen signalen in einem vierphasen-demodulator
US3818346A (en) * 1972-10-12 1974-06-18 J Fletcher Differential phase-shift-keyed signal resolver
DE2522519A1 (de) * 1975-03-07 1976-09-16 Marconi Co Ltd Filter-anordnung
FR2367387A1 (fr) * 1976-10-07 1978-05-05 Brossard Pierre Circuits de recuperation des frequences porteuses et rythmes dans des systemes de transmission numerique

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3638125A (en) * 1969-11-26 1972-01-25 Bell Telephone Labor Inc Apparatus and method for the synchronous detection of a differentially phase modulated signal
JPS4861063A (fr) * 1971-12-01 1973-08-27

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2138849A1 (de) * 1970-08-03 1972-02-10 Fujitsu Ltd Schaltung zur Trägerwellenrückgewinnung
DE2216259A1 (de) * 1972-04-05 1973-10-18 Licentia Gmbh Schaltungsanordnung zum ableiten der traegerfrequenz aus den empfangenen signalen in einem vierphasen-demodulator
US3818346A (en) * 1972-10-12 1974-06-18 J Fletcher Differential phase-shift-keyed signal resolver
DE2522519A1 (de) * 1975-03-07 1976-09-16 Marconi Co Ltd Filter-anordnung
FR2367387A1 (fr) * 1976-10-07 1978-05-05 Brossard Pierre Circuits de recuperation des frequences porteuses et rythmes dans des systemes de transmission numerique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ARCHIV FUR ELEKTRONIK UND UBERTRAGUNGSTECHNIK, vol. 30, no. 11, 1976, pages 441 - 447, STUTTGART (DE), KOECK: 'The analysis of a gated AFC with short duty cycles suitable for TDMA-PSK-modems' *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984004425A1 (fr) * 1983-04-25 1984-11-08 Inst Microtechnique De L Unive Cellule photovoltaique de grande surface et son procede de fabrication
EP0527481A1 (fr) * 1991-08-12 1993-02-17 Fujitsu Limited Circuit convertisseur de fréquence
US5388125A (en) * 1991-08-12 1995-02-07 Fujitsu Limited Frequency converter circuit with improved intermediate frequency stability
EP0533191A2 (fr) * 1991-09-19 1993-03-24 Nec Corporation Démodulateur de phase, à multiplication de fréquence, pour la correction d'erreurs de phase et de fréquence
EP0533191A3 (en) * 1991-09-19 1993-08-04 Nec Corporation Psk demodulator with freqency multiplication for the correction of phase and frequency errors

Also Published As

Publication number Publication date
GB1553654A (en) 1979-09-26
DE2820943B2 (de) 1980-02-14
NL7901243A (nl) 1979-08-21
DE2820943A1 (de) 1979-08-23
US4318049A (en) 1982-03-02
DE2820943C3 (de) 1980-10-30

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Legal Events

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