PT92601A - Processo de controlo automatico da frequencia na presenca de dados e aparelho para a sua realizacao - Google Patents

Processo de controlo automatico da frequencia na presenca de dados e aparelho para a sua realizacao

Info

Publication number
PT92601A
PT92601A PT92601A PT9260189A PT92601A PT 92601 A PT92601 A PT 92601A PT 92601 A PT92601 A PT 92601A PT 9260189 A PT9260189 A PT 9260189A PT 92601 A PT92601 A PT 92601A
Authority
PT
Portugal
Prior art keywords
frequency
carrier
reference oscillator
modulated
data
Prior art date
Application number
PT92601A
Other languages
English (en)
Other versions
PT92601B (pt
Inventor
David Edward Borth
James Frank Michael Kepler
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Publication of PT92601A publication Critical patent/PT92601A/pt
Publication of PT92601B publication Critical patent/PT92601B/pt

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
    • 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
    • H04L2027/0038—Correction of carrier offset using an equaliser
    • H04L2027/0042—Correction of carrier offset using an equaliser the equaliser providing the offset correction per se
    • 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
    • H04L2027/0051—Harmonic tracking

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Television Receiver Circuits (AREA)
  • Circuits Of Receivers In General (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
PT92601A 1988-12-16 1989-12-15 Processo de controlo automatico da frequencia na presenca de dados e aparelho para a sua realizacao PT92601B (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US28543388A 1988-12-16 1988-12-16

Publications (2)

Publication Number Publication Date
PT92601A true PT92601A (pt) 1990-06-29
PT92601B PT92601B (pt) 1996-07-31

Family

ID=23094209

Family Applications (1)

Application Number Title Priority Date Filing Date
PT92601A PT92601B (pt) 1988-12-16 1989-12-15 Processo de controlo automatico da frequencia na presenca de dados e aparelho para a sua realizacao

Country Status (16)

Country Link
EP (1) EP0373405B1 (pt)
JP (1) JP2556196B2 (pt)
AT (1) ATE126640T1 (pt)
CA (1) CA2003580C (pt)
DD (1) DD292788A5 (pt)
DE (1) DE68923857T2 (pt)
ES (1) ES2075844T3 (pt)
GR (1) GR3017379T3 (pt)
HK (1) HK1000408A1 (pt)
IE (1) IE71666B1 (pt)
IL (1) IL92288A (pt)
MX (1) MX171682B (pt)
MY (1) MY107067A (pt)
PT (1) PT92601B (pt)
TR (1) TR25778A (pt)
WO (1) WO1990007243A1 (pt)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2672454B1 (fr) * 1991-01-31 1994-10-07 Alcatel Telspace Procede de demodulation coherente pour modulation a deplacement de phase et dispositif de mise en óoeuvre de ce procede.
DE4103512A1 (de) * 1991-02-06 1992-08-13 Siemens Ag Optischer intradyn-ueberlagerungsemfaenger zur kohaerenten demodulation mehrstufig phasenmodulierter lichtwellen
EP0522998A3 (en) * 1991-07-09 1993-07-28 Ascom Tech Ag Method for estimating the frequency offset in a quadrature receiver
EP0526836B1 (en) * 1991-08-07 1997-01-29 Kabushiki Kaisha Toshiba QPSK demodulator with automatic frequency control
DE4128713A1 (de) * 1991-08-29 1993-03-04 Daimler Benz Ag Verfahren und anordnung zur messung der traegerfrequenzablage in einem mehrkanaluebertragungssystem
AU668230B2 (en) * 1992-11-25 1996-04-26 Nec Corporation Frequency error detecting device capable of correctly detecting a frequency error between a carrier frequency and a standard frequency
US5450456A (en) * 1993-11-12 1995-09-12 Daimler Benz Ag Method and arrangement for measuring the carrier frequency deviation in a multi-channel transmission system
US6023491A (en) * 1994-06-21 2000-02-08 Matsushita Electric Industrail Co., Ltd. Demodulation apparatus performing different frequency control functions using separately provided oscillators
EP0735730A3 (en) * 1995-03-28 1999-07-07 Matsushita Electric Industrial Co., Ltd. Automatic frequency controller
FR2753856B1 (fr) * 1996-09-23 1998-12-18 Procede et dispositif de detection de l'erreur sur la frequence d'une porteuse
CN1158786C (zh) 1997-03-04 2004-07-21 三菱电机株式会社 带频率偏移校正功能的接收机
JP2001045082A (ja) * 1999-07-28 2001-02-16 Matsushita Electric Ind Co Ltd 周波数オフセット量検出装置
JP2001086183A (ja) * 1999-09-09 2001-03-30 Alps Electric Co Ltd デジタル変調信号受信機
DE10005497A1 (de) * 2000-02-08 2001-08-09 Infineon Technologies Ag Verfahren und Schaltungsanordnung zum Demodulieren eines quadraturamplituden- oder phasenmodulierten Signals
AU2001257348A1 (en) 2000-04-28 2001-11-12 Broadcom Corporation Methods and systems for adaptive receiver equalization
EP2797225B1 (en) * 2013-04-24 2018-01-10 Analog Devices Global Method of and apparatus for demodulating an amplitude modulated signal

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4466108A (en) * 1981-10-06 1984-08-14 Communications Satellite Corporation TDMA/PSK Carrier synchronization without preamble
GB2124840A (en) * 1982-07-02 1984-02-22 Philips Electronic Associated Data demodulator for digital signals
US4583236A (en) * 1983-11-04 1986-04-15 Racal Data Communications Inc. Modified absolute phase detector
NL8402318A (nl) * 1984-07-23 1986-02-17 Philips Nv Inrichting voor het genereren van een hoekgemoduleerd draaggolfsignaal van constante amplitude in responsie op datasignalen.
US4583048A (en) * 1985-02-26 1986-04-15 Rca Corporation MSK digital demodulator for burst communications

Also Published As

Publication number Publication date
IE894025L (en) 1990-06-16
EP0373405A3 (en) 1992-02-26
CA2003580C (en) 1993-11-09
CA2003580A1 (en) 1990-06-16
GR3017379T3 (en) 1995-12-31
IL92288A0 (en) 1990-07-26
DE68923857T2 (de) 1996-04-04
MY107067A (en) 1995-09-30
JP2556196B2 (ja) 1996-11-20
IE71666B1 (en) 1997-02-26
JPH04502692A (ja) 1992-05-14
IL92288A (en) 1996-09-12
DE68923857D1 (de) 1995-09-21
PT92601B (pt) 1996-07-31
ATE126640T1 (de) 1995-09-15
DD292788A5 (de) 1991-08-08
EP0373405A2 (en) 1990-06-20
TR25778A (tr) 1993-09-01
MX171682B (es) 1993-11-10
WO1990007243A1 (en) 1990-06-28
EP0373405B1 (en) 1995-08-16
HK1000408A1 (en) 1998-03-20
ES2075844T3 (es) 1995-10-16

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Legal Events

Date Code Title Description
FG3A Patent granted, date of granting

Effective date: 19960410

MM3A Annulment or lapse

Free format text: LAPSE DUE TO NON-PAYMENT OF FEES

Effective date: 20011031