IT1243086B - Dispositivo per il controllo automatico di frequenza in demodulatori coerenti, per sistemi di modulazione m-qam - Google Patents

Dispositivo per il controllo automatico di frequenza in demodulatori coerenti, per sistemi di modulazione m-qam

Info

Publication number
IT1243086B
IT1243086B IT02160790A IT2160790A IT1243086B IT 1243086 B IT1243086 B IT 1243086B IT 02160790 A IT02160790 A IT 02160790A IT 2160790 A IT2160790 A IT 2160790A IT 1243086 B IT1243086 B IT 1243086B
Authority
IT
Italy
Prior art keywords
frequency control
automatic frequency
qam modulation
modulation systems
coherent demodulators
Prior art date
Application number
IT02160790A
Other languages
English (en)
Other versions
IT9021607A0 (it
IT9021607A1 (it
Inventor
Roberto Colombo
Donna Gianbattista Di
Original Assignee
Sits Soc It Telecom Siemens
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 Sits Soc It Telecom Siemens filed Critical Sits Soc It Telecom Siemens
Priority to IT02160790A priority Critical patent/IT1243086B/it
Publication of IT9021607A0 publication Critical patent/IT9021607A0/it
Priority to EP91202439A priority patent/EP0478080B1/en
Priority to DE69132481T priority patent/DE69132481T2/de
Priority to AU84660/91A priority patent/AU647522B2/en
Priority to FI914559A priority patent/FI914559A7/fi
Priority to NO913806A priority patent/NO178319C/no
Priority to ZA917756A priority patent/ZA917756B/xx
Publication of IT9021607A1 publication Critical patent/IT9021607A1/it
Application granted granted Critical
Publication of IT1243086B publication Critical patent/IT1243086B/it

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
    • H04L27/3818—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers
    • H04L27/3827—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers in which the carrier is recovered using only the demodulated baseband signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Radio Relay Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
IT02160790A 1990-09-28 1990-09-28 Dispositivo per il controllo automatico di frequenza in demodulatori coerenti, per sistemi di modulazione m-qam IT1243086B (it)

Priority Applications (7)

Application Number Priority Date Filing Date Title
IT02160790A IT1243086B (it) 1990-09-28 1990-09-28 Dispositivo per il controllo automatico di frequenza in demodulatori coerenti, per sistemi di modulazione m-qam
EP91202439A EP0478080B1 (en) 1990-09-28 1991-09-20 Automatic frequency control device in coherent demodulators for M-QAM modulation systems
DE69132481T DE69132481T2 (de) 1990-09-28 1991-09-20 Einrichtung zur automatischen Frequenzreglung in kohärenten M-QAM-Demodulatoren
AU84660/91A AU647522B2 (en) 1990-09-28 1991-09-23 Automatic frequency control device in coherent demodulators for M-QAM modulation systems
FI914559A FI914559A7 (fi) 1990-09-28 1991-09-27 Automaattinen taajuudensäätölaite M-QAM modulaatiojärjestelmien koherenteihin demodulaattoreihin
NO913806A NO178319C (no) 1990-09-28 1991-09-27 Innretning for automatisk frekvenskontroll i koherente demodulatorer for M-QAM-modulasjonssystemer
ZA917756A ZA917756B (en) 1990-09-28 1991-09-27 Automatic frequency control device in coherent demodulators for m-qam modulation systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT02160790A IT1243086B (it) 1990-09-28 1990-09-28 Dispositivo per il controllo automatico di frequenza in demodulatori coerenti, per sistemi di modulazione m-qam

Publications (3)

Publication Number Publication Date
IT9021607A0 IT9021607A0 (it) 1990-09-28
IT9021607A1 IT9021607A1 (it) 1992-03-28
IT1243086B true IT1243086B (it) 1994-05-23

Family

ID=11184258

Family Applications (1)

Application Number Title Priority Date Filing Date
IT02160790A IT1243086B (it) 1990-09-28 1990-09-28 Dispositivo per il controllo automatico di frequenza in demodulatori coerenti, per sistemi di modulazione m-qam

Country Status (7)

Country Link
EP (1) EP0478080B1 (it)
AU (1) AU647522B2 (it)
DE (1) DE69132481T2 (it)
FI (1) FI914559A7 (it)
IT (1) IT1243086B (it)
NO (1) NO178319C (it)
ZA (1) ZA917756B (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2729033B1 (fr) * 1995-01-02 1997-04-04 Alcatel Telspace Dispositif de recuperation de porteuse pour recepteur de signaux de type maq et recepteur l'employant
US5867503A (en) * 1996-01-30 1999-02-02 Mitsubishi Denki Kabushiki Kaisha Digital sound broadcasting receiver and automatic phase controlling method therefor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58221548A (ja) * 1982-06-18 1983-12-23 Fujitsu Ltd 位相同期回路
JPH0810879B2 (ja) * 1986-02-20 1996-01-31 富士通株式会社 復調装置

Also Published As

Publication number Publication date
FI914559L (fi) 1992-03-29
DE69132481D1 (de) 2001-01-04
NO913806D0 (no) 1991-09-27
FI914559A7 (fi) 1992-03-29
EP0478080B1 (en) 2000-11-29
FI914559A0 (fi) 1991-09-27
IT9021607A0 (it) 1990-09-28
AU647522B2 (en) 1994-03-24
AU8466091A (en) 1992-04-02
IT9021607A1 (it) 1992-03-28
ZA917756B (en) 1992-05-27
DE69132481T2 (de) 2001-07-05
EP0478080A3 (en) 1993-02-24
NO913806L (no) 1992-03-30
EP0478080A2 (en) 1992-04-01
NO178319B (no) 1995-11-20
NO178319C (no) 1996-02-28

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19970917