ES2115029T3 - Dispositivo de desmodulacion de señales pi/4-qpsk. - Google Patents

Dispositivo de desmodulacion de señales pi/4-qpsk.

Info

Publication number
ES2115029T3
ES2115029T3 ES93400848T ES93400848T ES2115029T3 ES 2115029 T3 ES2115029 T3 ES 2115029T3 ES 93400848 T ES93400848 T ES 93400848T ES 93400848 T ES93400848 T ES 93400848T ES 2115029 T3 ES2115029 T3 ES 2115029T3
Authority
ES
Spain
Prior art keywords
signal
phase
control
quadrature
demodulation device
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
ES93400848T
Other languages
English (en)
Inventor
Thierry Podolak
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.)
Alcatel Lucent SAS
Original Assignee
Alcatel Alsthom Compagnie Generale dElectricite
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 Alcatel Alsthom Compagnie Generale dElectricite filed Critical Alcatel Alsthom Compagnie Generale dElectricite
Application granted granted Critical
Publication of ES2115029T3 publication Critical patent/ES2115029T3/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
    • H04L2027/0028—Correction of carrier offset at passband only
    • 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
    • H04L2027/0053—Closed loops
    • H04L2027/0057—Closed loops quadrature phase
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

LA INVENCION SE REFIERE A UN DISPOSITIVO DE DEMODULACION DE UNA SEÑAL MODULADA SOBRE DOS EJES EN CUADRATURA SEGUN LA TECNICA DE MODULACION PI/4-QPSK QUE APLICA ALTERNATIVAMENTE DOS CONSTELACIONES DECALADAS EN FASE, COMPRENDIENDO ESTE DISPOSITIVO: UNA SEÑAL LOCAL QUE TIENE SENSIBLEMENTE LA FRECUENCIA PORTADORA, PROPORCIONAN, TRAS EL FILTRADO (30, 31), LAS COMPONENTES EN FASE P Y EN CUADRATURA Q DE LA SEÑAL RECIBIDA DEMODULADA, OS DE CONTROL (28) Y QUE INCLUYE UN ESTIMADOR DE FASE (33) QUE PRODUCE UNA SEÑAL DE ESTIMACION DE FASE E (35), QUE INTERVIENE EN EL CONTROL DEL OSCILADOR (28), OBTENIENDOSE ESTA SEÑAL DE ESTIMACION DE FASE A PARTIR DE LAS COMPONENTES EN FASE P Y EN CUADRATURA Q DE LA SEÑAL RECIBIDA DEMODULADA. LOS MEDIOS DE CONTROL DE FASE COMPRENDEN MEDIOS (34) DE INVERSION ALTERNATIVA DE LA POLARIDAD DE LA SEÑAL DE ESTIMACION DE FASE E (35), AL RITMO DE LA ALTERNANCIA DE LAS CONSTELACIONES, PROPORCIONANDO LA SEÑAL DE CONTROL (39) DESTINADA AL CONTROL DEL OSCILADOR (28) TRAS EL FILTRADO (29) EN EL BUCLE.
ES93400848T 1992-04-03 1993-04-01 Dispositivo de desmodulacion de señales pi/4-qpsk. Expired - Lifetime ES2115029T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9204101A FR2689712B1 (fr) 1992-04-03 1992-04-03 Dispositif de démodulation de signaux numériques modulés selon une technique à constellations de modulation alternées.

Publications (1)

Publication Number Publication Date
ES2115029T3 true ES2115029T3 (es) 1998-06-16

Family

ID=9428465

Family Applications (1)

Application Number Title Priority Date Filing Date
ES93400848T Expired - Lifetime ES2115029T3 (es) 1992-04-03 1993-04-01 Dispositivo de desmodulacion de señales pi/4-qpsk.

Country Status (7)

Country Link
US (1) US5438594A (es)
EP (1) EP0564361B1 (es)
JP (1) JPH0621989A (es)
CA (1) CA2093275A1 (es)
DE (1) DE69317137T2 (es)
ES (1) ES2115029T3 (es)
FR (1) FR2689712B1 (es)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2280324B (en) * 1993-07-16 1998-07-22 Plessey Semiconductors Ltd Detectors
JPH07264257A (ja) * 1994-03-24 1995-10-13 Kokusai Electric Co Ltd π／４シフトＱＰＳＫ同期回路
JP3540393B2 (ja) * 1994-10-31 2004-07-07 三洋電機株式会社 コスタスループ
WO1996042160A2 (en) * 1995-06-08 1996-12-27 Philips Electronics N.V. Transmission system using transmitter with phase modulator and frequency multiplier
US6097770A (en) * 1996-10-31 2000-08-01 Lucent Technologies Inc. Frequency offset estimation for wireless systems based on channel impulse response
FR2764158B1 (fr) * 1997-06-03 1999-08-20 Texas Instruments France Procede et dispositif d'estimation du decalage de frequence dans un signal recu par un demodulateur de telephone mobile
US6546425B1 (en) * 1998-10-09 2003-04-08 Netmotion Wireless, Inc. Method and apparatus for providing mobile and other intermittent connectivity in a computing environment
US6377620B1 (en) * 1999-01-19 2002-04-23 Interdigital Technology Corporation Balancing amplitude and phase
DE19948745A1 (de) * 1999-10-09 2001-04-12 Philips Corp Intellectual Pty Schaltungsanordnung zur Demodulation eines Zwischenfrequenz-Videosignals
US7356089B2 (en) * 2003-09-05 2008-04-08 Nortel Networks Limited Phase offset spatial multiplexing
JP4684185B2 (ja) * 2006-08-15 2011-05-18 富士通株式会社 通信システム
GB2459478A (en) * 2008-04-23 2009-10-28 Audium Semiconductor Ltd Telecommunication System with simplified Receiver

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5820181B2 (ja) * 1974-09-25 1983-04-21 日本電気株式会社 タソウイソウドウキフクチヨウソウチ
US4344178A (en) * 1980-09-26 1982-08-10 Harris Corporation Costas loop QPSK demodulator
DE3823374A1 (de) * 1988-07-09 1990-01-18 Philips Patentverwaltung Vorrichtung zur entzerrung und demodulation winkelmodulierter datensignale
JP2552927B2 (ja) * 1990-01-26 1996-11-13 三菱電機株式会社 π／４シフトＱＰＳＫ信号の復調装置

Also Published As

Publication number Publication date
CA2093275A1 (fr) 1993-10-04
JPH0621989A (ja) 1994-01-28
FR2689712B1 (fr) 1994-08-19
DE69317137T2 (de) 1998-06-25
EP0564361A1 (fr) 1993-10-06
FR2689712A1 (fr) 1993-10-08
EP0564361B1 (fr) 1998-03-04
DE69317137D1 (de) 1998-04-09
US5438594A (en) 1995-08-01

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