ES2075844T3 - Control automatico de frecuencia en presencia de datos. - Google Patents

Control automatico de frecuencia en presencia de datos.

Info

Publication number
ES2075844T3
ES2075844T3 ES89121747T ES89121747T ES2075844T3 ES 2075844 T3 ES2075844 T3 ES 2075844T3 ES 89121747 T ES89121747 T ES 89121747T ES 89121747 T ES89121747 T ES 89121747T ES 2075844 T3 ES2075844 T3 ES 2075844T3
Authority
ES
Spain
Prior art keywords
frequency
carrier
data
reference oscillator
modulated
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
ES89121747T
Other languages
English (en)
Inventor
David Edward Borth
James Frank Michael Kepler
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.)
Motorola Solutions Inc
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
Application granted granted Critical
Publication of ES2075844T3 publication Critical patent/ES2075844T3/es
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
    • H04L27/18—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)
  • Circuits Of Receivers In General (AREA)
  • Television Receiver Circuits (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

DICHO APARATO DE CONTROL (AFC) PRODUCE LOS EFECTOS DE DATOS MODULADOS POR UNA ONDA PORTADORA (25) Y DETECTA LA DIFERENCIA ENTRE LA FRECUENCIA DE LA ONDA Y LA FASE DEL OSCILADOR DE REFERENCIA (30), Y AJUSTA LA FRECUENCIA DE DICHO OSCILADOR (35) PARA ELIMINAR TAL DIFERENCIA DE FRECUENCIA ( ). ESTA CARACTERIZADO POR DIGITALIZAR (4) LA ONDA PORTADORA MODULADA EN CUADRATURA DETERMINANDO LA ONDA MODULADA EN CUADRATURA A UNA MULTIPLE CANTIDAD DE BITS MODULADOS ROTANDO FASES HACIA LA ARCOTANGENTE (I/Q) = O (25/55/60) Y PRODUCE LOS EFECTOS DE DATOS DE CUADRATURA (I/Q) MODULADOS POR LA ONDA, Y DETECTAR LA DIFERENCIA DE FRECUENCIA ( ) ENTRE LA FRECUENCIA DE LA ONDA Y LA DE UN TIPO CONTROLADO DE VOLTAJE DEL OSCILADOR DE REFERENCIA (35) CON UN ESTIMADOR DE LA TRAYECTORIA DE LA FASE (55), Y ESTABLECE Y GENERA EL VOLTAJE DE CORRECCION RQUERIDO (1) PARA EL OSCILADOR (VCO) (35) CON EL ESTIMADOR DE TRAYECTORIA (45).
ES89121747T 1988-12-16 1989-12-11 Control automatico de frecuencia en presencia de datos. Expired - Lifetime ES2075844T3 (es)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
ES2075844T3 true ES2075844T3 (es) 1995-10-16

Family

ID=23094209

Family Applications (1)

Application Number Title Priority Date Filing Date
ES89121747T Expired - Lifetime ES2075844T3 (es) 1988-12-16 1989-12-11 Control automatico de frecuencia en presencia de datos.

Country Status (16)

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

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
DE69217140T2 (de) * 1991-08-07 1997-07-03 Toshiba Ave Kk QPSK-Demodulator mit automatischer Frequenznachregelung
DE4128713A1 (de) * 1991-08-29 1993-03-04 Daimler Benz Ag Verfahren und anordnung zur messung der traegerfrequenzablage in einem mehrkanaluebertragungssystem
EP0599300B1 (en) * 1992-11-25 2000-06-07 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
US5734972A (en) * 1995-03-28 1998-03-31 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
DE60139121D1 (de) 2000-04-28 2009-08-13 Broadcom Corp Sende- und empfangssysteme und zugehörige verfahren für serielle hochgeschwindigkeitsdaten
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
ATE126640T1 (de) 1995-09-15
GR3017379T3 (en) 1995-12-31
TR25778A (tr) 1993-09-01
DE68923857T2 (de) 1996-04-04
MY107067A (en) 1995-09-30
EP0373405A2 (en) 1990-06-20
IE71666B1 (en) 1997-02-26
EP0373405B1 (en) 1995-08-16
CA2003580C (en) 1993-11-09
IE894025L (en) 1990-06-16
JP2556196B2 (ja) 1996-11-20
WO1990007243A1 (en) 1990-06-28
DE68923857D1 (de) 1995-09-21
PT92601A (pt) 1990-06-29
HK1000408A1 (en) 1998-03-20
JPH04502692A (ja) 1992-05-14
DD292788A5 (de) 1991-08-08
MX171682B (es) 1993-11-10
IL92288A (en) 1996-09-12
EP0373405A3 (en) 1992-02-26
PT92601B (pt) 1996-07-31
IL92288A0 (en) 1990-07-26
CA2003580A1 (en) 1990-06-16

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