IT1244206B - Sistema e circuito per la stima della frequenza di portante di un segnale - Google Patents

Sistema e circuito per la stima della frequenza di portante di un segnale

Info

Publication number
IT1244206B
IT1244206B IT02244490A IT2244490A IT1244206B IT 1244206 B IT1244206 B IT 1244206B IT 02244490 A IT02244490 A IT 02244490A IT 2244490 A IT2244490 A IT 2244490A IT 1244206 B IT1244206 B IT 1244206B
Authority
IT
Italy
Prior art keywords
estimation
circuit
signal
carrier frequency
carrier
Prior art date
Application number
IT02244490A
Other languages
English (en)
Other versions
IT9022444A0 (it
IT9022444A1 (it
Inventor
Franco Guglielmi
Arnaldo Spalvieri
Original Assignee
Telettra 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 Telettra Spa filed Critical Telettra Spa
Priority to IT02244490A priority Critical patent/IT1244206B/it
Publication of IT9022444A0 publication Critical patent/IT9022444A0/it
Priority to EP91121862A priority patent/EP0491403B1/en
Priority to JP35402591A priority patent/JP3207900B2/ja
Priority to DE69124952T priority patent/DE69124952T2/de
Priority to US07/810,217 priority patent/US5299231A/en
Publication of IT9022444A1 publication Critical patent/IT9022444A1/it
Application granted granted Critical
Publication of IT1244206B publication Critical patent/IT1244206B/it

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
    • H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
    • H04L27/2271—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals
    • H04L27/2273—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals associated with quadrature demodulation, e.g. Costas loop
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
    • G01R23/12—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage by converting frequency into phase shift
    • 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
    • H04L2027/0063—Elements of loops
    • H04L2027/0067—Phase error detectors
IT02244490A 1990-12-19 1990-12-19 Sistema e circuito per la stima della frequenza di portante di un segnale IT1244206B (it)

Priority Applications (5)

Application Number Priority Date Filing Date Title
IT02244490A IT1244206B (it) 1990-12-19 1990-12-19 Sistema e circuito per la stima della frequenza di portante di un segnale
EP91121862A EP0491403B1 (en) 1990-12-19 1991-12-19 Device for estimating the carrier frequency of a digital signal
JP35402591A JP3207900B2 (ja) 1990-12-19 1991-12-19 変調伝送における数値信号の搬送周波数値を評価する方法及び装置
DE69124952T DE69124952T2 (de) 1990-12-19 1991-12-19 Vorrichtung zur Abschätzung der Trägerfrequenz eines digitalen Signals
US07/810,217 US5299231A (en) 1990-12-19 1991-12-19 Method and device for estimating the carrier frequency of a modulated data signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT02244490A IT1244206B (it) 1990-12-19 1990-12-19 Sistema e circuito per la stima della frequenza di portante di un segnale

Publications (3)

Publication Number Publication Date
IT9022444A0 IT9022444A0 (it) 1990-12-19
IT9022444A1 IT9022444A1 (it) 1992-06-19
IT1244206B true IT1244206B (it) 1994-07-08

Family

ID=11196369

Family Applications (1)

Application Number Title Priority Date Filing Date
IT02244490A IT1244206B (it) 1990-12-19 1990-12-19 Sistema e circuito per la stima della frequenza di portante di un segnale

Country Status (5)

Country Link
US (1) US5299231A (it)
EP (1) EP0491403B1 (it)
JP (1) JP3207900B2 (it)
DE (1) DE69124952T2 (it)
IT (1) IT1244206B (it)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1255852B (it) * 1992-10-09 1995-11-17 Alcatel Italia Sistema e circuito per la stima della frequenza della portante di un segnale numerico psk
JPH06205062A (ja) * 1993-01-08 1994-07-22 Nec Corp 遅延検波回路
EP0674412B1 (en) * 1994-03-25 2004-07-14 Samsung Electronics Co., Ltd. Method and apparatus for automatic frequency control
AUPN455695A0 (en) * 1995-08-01 1995-08-24 Canon Kabushiki Kaisha Qam spread spectrum demodulation system
FR2781626B1 (fr) * 1998-07-23 2003-02-07 St Microelectronics Sa Procede d'estimation d'erreur de frequence d'un demodulateur qpsk
GB0103669D0 (en) * 2001-02-15 2001-03-28 Central Research Lab Ltd A method of estimating the carrier frequency of a phase-modulated signal
EP1428366A1 (en) * 2001-09-13 2004-06-16 Redline Communications Inc. Method and apparatus for multiple resolution carrier offset recovery
EP2337241B1 (en) * 2009-12-18 2013-12-18 Alcatel Lucent Carrier phase estimator for non-linear impairment monitoring and mitigation in coherent optical system

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4328587A (en) * 1979-02-19 1982-05-04 Kokusai Denshin Denwa Kabushiki Kaisha Phase slip detector and systems employing the detector
FR2552959B1 (fr) * 1983-10-04 1985-10-25 Vandamme Patrick Circuit de recuperation d'une onde porteuse muni d'un moyen d'aide a l'acquisition automatique et rapide
US4611165A (en) * 1984-03-30 1986-09-09 Honeywell Inc. Pulse RF frequency measurement apparatus
US4712221A (en) * 1986-08-29 1987-12-08 International Business Machines Corporation Carrier recovery of modulated signals
US4761604A (en) * 1987-04-27 1988-08-02 Tektronix, Inc. Identification of carrier frequency for pulsed signals
FR2621188B1 (fr) * 1987-09-25 1989-12-29 Labo Electronique Physique Circuit de recuperation de l'onde porteuse de systemes de transmissions numeriques
DE3736124A1 (de) * 1987-10-26 1989-05-03 Licentia Gmbh Verfahren und anordnung zur bestimmung der momentanfrequenz eines signals
CA1288878C (en) * 1988-08-15 1991-09-10 John D. Mcnicol Timing and carrier recovery in tdma without preamable sequence
US4904930A (en) * 1988-09-16 1990-02-27 Rockwell International Corporation Method of carrier frequency estimation
GB8828912D0 (en) * 1988-12-10 1989-01-18 Emi Plc Thorn Frequency measurement
JPH082060B2 (ja) * 1989-09-13 1996-01-10 日本電気株式会社 搬送波再生方式およびディジタル位相復調装置

Also Published As

Publication number Publication date
IT9022444A0 (it) 1990-12-19
JP3207900B2 (ja) 2001-09-10
US5299231A (en) 1994-03-29
DE69124952D1 (de) 1997-04-10
EP0491403A2 (en) 1992-06-24
DE69124952T2 (de) 1997-10-09
IT9022444A1 (it) 1992-06-19
EP0491403B1 (en) 1997-03-05
EP0491403A3 (en) 1993-02-10
JPH04315341A (ja) 1992-11-06

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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: 19971128