DE69322330D1 - Ganzdigitales Demodulationssystem für QAM-Signalisierung bei Verbindungen niedrigen Fassungsvermögens - Google Patents

Ganzdigitales Demodulationssystem für QAM-Signalisierung bei Verbindungen niedrigen Fassungsvermögens

Info

Publication number
DE69322330D1
DE69322330D1 DE69322330T DE69322330T DE69322330D1 DE 69322330 D1 DE69322330 D1 DE 69322330D1 DE 69322330 T DE69322330 T DE 69322330T DE 69322330 T DE69322330 T DE 69322330T DE 69322330 D1 DE69322330 D1 DE 69322330D1
Authority
DE
Germany
Prior art keywords
low
digital demodulation
demodulation system
capacity connections
qam signaling
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 - Fee Related
Application number
DE69322330T
Other languages
English (en)
Other versions
DE69322330T2 (de
Inventor
Maurizio Bolla
Massimo Gelichi
Franco Guglielmi
Nino Leuratti
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.)
Alcatel Lucent SAS
Original Assignee
Alcatel Alsthom Compagnie Generale dElectricite
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 Alcatel Alsthom Compagnie Generale dElectricite filed Critical Alcatel Alsthom Compagnie Generale dElectricite
Application granted granted Critical
Publication of DE69322330D1 publication Critical patent/DE69322330D1/de
Publication of DE69322330T2 publication Critical patent/DE69322330T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04L27/32—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
    • H04L27/3845—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier
    • H04L27/3854—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier using a non - coherent carrier, including systems with baseband correction for phase or frequency offset
    • H04L27/3872—Compensation for phase rotation in the demodulated signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
DE69322330T 1992-07-27 1993-07-22 Ganzdigitales Demodulationssystem für QAM-Signalisierung bei Verbindungen niedrigen Fassungsvermögens Expired - Fee Related DE69322330T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI921820A IT1259013B (it) 1992-07-27 1992-07-27 Sistema demodulatore completamente digitale per segnalazioni qam in collegamenti di piccola capacita'

Publications (2)

Publication Number Publication Date
DE69322330D1 true DE69322330D1 (de) 1999-01-14
DE69322330T2 DE69322330T2 (de) 1999-04-29

Family

ID=11363750

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69322330T Expired - Fee Related DE69322330T2 (de) 1992-07-27 1993-07-22 Ganzdigitales Demodulationssystem für QAM-Signalisierung bei Verbindungen niedrigen Fassungsvermögens

Country Status (6)

Country Link
US (1) US5412693A (de)
EP (1) EP0583643B1 (de)
JP (1) JPH06164666A (de)
DE (1) DE69322330T2 (de)
IT (1) IT1259013B (de)
NO (1) NO308760B1 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2706714B1 (fr) * 1993-06-17 1995-07-21 Alcatel Telspace Système de réception d'un signal numérique à modulation de phase et d'amplitude.
US5557643A (en) * 1995-04-07 1996-09-17 Hughes Electronics Automatic frequency control system for GMSK-modulated signals
DE19522231A1 (de) * 1995-06-20 1997-01-09 Bosch Gmbh Robert Frequenz- und Phasenregelkreis
US5764113A (en) * 1997-01-10 1998-06-09 Harris Corporation Re-sampling circuit and modulator using same
SE9802109D0 (sv) * 1998-06-12 1998-06-12 Ericsson Telefon Ab L M One-bit correlator rake receiver
US6775334B1 (en) * 1998-11-03 2004-08-10 Broadcom Corporation Equalization and decision-directed loops with trellis demodulation in high definition TV
FR2786965B1 (fr) * 1998-12-04 2001-01-19 Thomson Multimedia Sa Procede de recuperation de porteuse de signal
CA2302004A1 (en) * 2000-03-22 2001-09-22 Vajira N. S. Samarasooriya Method and system for achieving carrier frequency synchronization in a high speed receiver
DE10157864B4 (de) 2001-11-26 2006-08-10 Infineon Technologies Ag Quadratur-Amplituden-Modulations- (QAM) Empfänger
DE10249492A1 (de) 2002-10-24 2004-05-13 Micronas Gmbh Verfahren und Schaltung zur Erzeugung eines Hilfssymbols zum Einregeln eines QAM-Demodulators
US8723651B2 (en) 2010-07-01 2014-05-13 Intelleflex Corporation Variable rate preamble detection using ratiometric methods

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
FR2478914B1 (fr) * 1980-03-19 1986-01-31 Ibm France Procede et dispositif pour l'ajustement initial de l'horloge d'un recepteur de donnees synchrone
FR2525055A1 (fr) * 1982-04-09 1983-10-14 Trt Telecom Radio Electr Procede de correction de frequence de la porteuse locale dans le recepteur d'un systeme de transmission de donnees et recepteur utilisant ce procede
US4737728A (en) * 1986-02-28 1988-04-12 Hitachi, Ltd. Digitally processed demodulator for quadrature modulated signals
US4879728A (en) * 1989-01-31 1989-11-07 American Telephone And Telegraph Company, At&T Bell Laboratories DPSK carrier acquisition and tracking arrangement
DE69217140T2 (de) * 1991-08-07 1997-07-03 Toshiba Ave Kk QPSK-Demodulator mit automatischer Frequenznachregelung

Also Published As

Publication number Publication date
IT1259013B (it) 1996-03-11
NO932470L (no) 1994-01-28
NO308760B1 (no) 2000-10-23
DE69322330T2 (de) 1999-04-29
NO932470D0 (no) 1993-07-07
JPH06164666A (ja) 1994-06-10
ITMI921820A0 (it) 1992-07-27
EP0583643B1 (de) 1998-12-02
EP0583643A1 (de) 1994-02-23
ITMI921820A1 (it) 1994-01-27
US5412693A (en) 1995-05-02

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Legal Events

Date Code Title Description
8327 Change in the person/name/address of the patent owner

Owner name: ALCATEL, PARIS, FR

8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee