DE69132481D1 - Einrichtung zur automatischen Frequenzreglung in kohärenten M-QAM-Demodulatoren - Google Patents

Einrichtung zur automatischen Frequenzreglung in kohärenten M-QAM-Demodulatoren

Info

Publication number
DE69132481D1
DE69132481D1 DE69132481T DE69132481T DE69132481D1 DE 69132481 D1 DE69132481 D1 DE 69132481D1 DE 69132481 T DE69132481 T DE 69132481T DE 69132481 T DE69132481 T DE 69132481T DE 69132481 D1 DE69132481 D1 DE 69132481D1
Authority
DE
Germany
Prior art keywords
coherent
frequency control
automatic frequency
qam demodulators
demodulators
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 - Lifetime
Application number
DE69132481T
Other languages
English (en)
Other versions
DE69132481T2 (de
Inventor
Roberto Colombo
Donna Giambattista Di
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.)
Siemens Communications Inc
Original Assignee
Italtel SpA
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 Italtel SpA filed Critical Italtel SpA
Publication of DE69132481D1 publication Critical patent/DE69132481D1/de
Application granted granted Critical
Publication of DE69132481T2 publication Critical patent/DE69132481T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04L27/3818—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)
DE69132481T 1990-09-28 1991-09-20 Einrichtung zur automatischen Frequenzreglung in kohärenten M-QAM-Demodulatoren Expired - Lifetime DE69132481T2 (de)

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 (2)

Publication Number Publication Date
DE69132481D1 true DE69132481D1 (de) 2001-01-04
DE69132481T2 DE69132481T2 (de) 2001-07-05

Family

ID=11184258

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69132481T Expired - Lifetime DE69132481T2 (de) 1990-09-28 1991-09-20 Einrichtung zur automatischen Frequenzreglung in kohärenten M-QAM-Demodulatoren

Country Status (7)

Country Link
EP (1) EP0478080B1 (de)
AU (1) AU647522B2 (de)
DE (1) DE69132481T2 (de)
FI (1) FI914559A (de)
IT (1) IT1243086B (de)
NO (1) NO178319C (de)
ZA (1) ZA917756B (de)

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 (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58131813A (ja) * 1982-02-01 1983-08-05 Fujitsu Ten Ltd 車載用ラジオ受信機
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
IT9021607A1 (it) 1992-03-28
ZA917756B (en) 1992-05-27
IT1243086B (it) 1994-05-23
FI914559A0 (fi) 1991-09-27
DE69132481T2 (de) 2001-07-05
AU8466091A (en) 1992-04-02
NO913806L (no) 1992-03-30
NO178319C (no) 1996-02-28
EP0478080A2 (de) 1992-04-01
FI914559A (fi) 1992-03-29
EP0478080A3 (en) 1993-02-24
AU647522B2 (en) 1994-03-24
NO913806D0 (no) 1991-09-27
NO178319B (no) 1995-11-20
IT9021607A0 (it) 1990-09-28
EP0478080B1 (de) 2000-11-29

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Legal Events

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

Owner name: SIEMENS INFORMATION AND COMMUNICATION NETWORKS S.P

8364 No opposition during term of opposition