ES2050419T3 - Un metodo para controlar la frecuencia de un radiorreceptor coherente y un aparato para llevar a cabo el metodo. - Google Patents

Un metodo para controlar la frecuencia de un radiorreceptor coherente y un aparato para llevar a cabo el metodo.

Info

Publication number
ES2050419T3
ES2050419T3 ES90850005T ES90850005T ES2050419T3 ES 2050419 T3 ES2050419 T3 ES 2050419T3 ES 90850005 T ES90850005 T ES 90850005T ES 90850005 T ES90850005 T ES 90850005T ES 2050419 T3 ES2050419 T3 ES 2050419T3
Authority
ES
Spain
Prior art keywords
signal
sequence
analysis
viterbi
data
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
ES90850005T
Other languages
English (en)
Inventor
Alex Krister Raith
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Application granted granted Critical
Publication of ES2050419T3 publication Critical patent/ES2050419T3/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
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • 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
    • H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Error Detection And Correction (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Circuits Of Receivers In General (AREA)
  • Radio Relay Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Steroid Compounds (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Noise Elimination (AREA)

Abstract

LA INVENCION SE REFIERE A UN METODO Y UNA DISPOSICION PARA CONTROLAR LA FRECUENCIA DE UN RADIO-RECEPTOR QUE RECIBE SECUENCIAS DE SEÑALES, QUE HAN ESTADO SOMETIDAS A INTERFERENCIA, Y QUE INCLUYEN UNA SECUENCIA DE SINCRONIZACION Y UNA SECUENCIA DE DATOS. UNA SECUENCIA DE SEÑALES ES CONVERTIDA ANALOGICA-NUMERICA (3) A PUNTOS DE SEÑALES (I, Q) QUE SE PRETENDEN ANALIZAR, Y UN ALGORITMO VITERBI (10) SE ADAPTA (12, 13) A LAS INTERFERENCIAS DOMINANTES, CON AYUDA DE LA SECUENCIA DE SINCRONIZACION. LA SECUENCIA DE DATOS ES VITERBI ANALIZADA A TRAVES DE UN GRAN NUMERO DE FASES DE CALCULO CON EL FIN DE DETERMINAR LA SECUENCIA DE BIT DE LA SECUENCIA DE DATOS. DE CONFORMIDAD CON LA INVENCION, SE EXTRAE UNA SECUENCIA DE BIT DURANTE EL ANALISIS VITERBI, CON UN RETARDO DE TIEMPO (TE) POSTERIOR A EFECTUAR UNAS POCAS FASES DE CALCULO, Y SE CALCULA (14) UN PUNTO DE SEÑALES CORRESPONDIENTEMENTE EXTRACTADO. EL PUNTO DE SEÑALES QUE SE PRETENDE ANALIZAR, CORRESPONDIENTE AL PUNTO DE SEÑALES EXTRACTADO, SE RETRASA EN TIEMPO Y SE DIVIDE (16,TE) Y COMPARADO EN FASE (15) CON EL PUNTO DE SEÑALES EXTRACTADO. SE HACEN CORRESPONDIENTES COMPARACIONES DE FASE CON RESPECTO A LOS PUNTOS DE SEÑALES CONSECUTIVOS EN LA SECUENCIA DE DATOS, Y LAS MAGNITUDES ANGULARES OBTENIDAS EN LA COMPARACION DE FASE SE FILTRAN CONTRA EL PASO DE BAJAS FRECUENCIAS, Y SE INTEGRAN (17) PARA FORMAR UNA SEÑAL (V) DESFASADA. LOS PUNTOS DE SEÑALES QUE SE PRETENDE ANALIZAR SE DESPLAZAN ANGULARMENTE (11) MEDIANTE LA SEÑAL (V) DESFASADA, CON ANTERIORIDAD AL ANALISIS VITERBI.
ES90850005T 1989-01-26 1990-01-04 Un metodo para controlar la frecuencia de un radiorreceptor coherente y un aparato para llevar a cabo el metodo. Expired - Lifetime ES2050419T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8900282A SE462943B (sv) 1989-01-26 1989-01-26 Saett och anordning foer frekvensstyrning av en koherent radiomottagare

Publications (1)

Publication Number Publication Date
ES2050419T3 true ES2050419T3 (es) 1994-05-16

Family

ID=20374869

Family Applications (1)

Application Number Title Priority Date Filing Date
ES90850005T Expired - Lifetime ES2050419T3 (es) 1989-01-26 1990-01-04 Un metodo para controlar la frecuencia de un radiorreceptor coherente y un aparato para llevar a cabo el metodo.

Country Status (21)

Country Link
US (1) US5093848A (es)
EP (1) EP0381637B1 (es)
JP (1) JP2634319B2 (es)
KR (1) KR960000608B1 (es)
CN (1) CN1020532C (es)
AT (1) ATE103445T1 (es)
AU (1) AU619944B2 (es)
CA (1) CA2007973C (es)
DE (1) DE69007506T2 (es)
DK (1) DK0381637T3 (es)
ES (1) ES2050419T3 (es)
FI (1) FI904710A0 (es)
HK (1) HK78494A (es)
IE (1) IE64267B1 (es)
MY (1) MY104867A (es)
NO (1) NO301919B1 (es)
NZ (1) NZ232081A (es)
PT (1) PT92981B (es)
SE (1) SE462943B (es)
SG (1) SG84094G (es)
WO (1) WO1990009070A1 (es)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE462942B (sv) * 1989-01-26 1990-09-17 Ericsson Telefon Ab L M Saett och anordning foer snabb frekvensstyrning av en koherent radiomottagare
SE465245B (sv) * 1989-12-22 1991-08-12 Ericsson Telefon Ab L M Foerfarande att utfoera kanalestimering foer en faedande kanal vid oeverfoering av symbolsekvenser
US5263026A (en) * 1991-06-27 1993-11-16 Hughes Aircraft Company Maximum likelihood sequence estimation based equalization within a mobile digital cellular receiver
FI96257C (fi) * 1994-04-13 1996-05-27 Nokia Telecommunications Oy Menetelmä radiotaajuisen signaalin vaihevirheen määrittämiseksi, sekä vastaanotin
US5515345A (en) * 1994-08-23 1996-05-07 Jeane K. Barreira Control unit for automobile audio system
WO1996008925A1 (en) * 1994-09-12 1996-03-21 Scientific-Atlanta, Inc. Cable television apparatus employing two-way communication
US5568518A (en) * 1994-09-14 1996-10-22 Ericsson Ge Mobile Communications Inc. Fast automatic gain control
US5586128A (en) * 1994-11-17 1996-12-17 Ericsson Ge Mobile Communications Inc. System for decoding digital data using a variable decision depth
US6118807A (en) * 1994-12-23 2000-09-12 Intermec Ip Corp. Methodology for received signal enhancement utilizing delay diversity processing
US5757855A (en) * 1995-11-29 1998-05-26 David Sarnoff Research Center, Inc. Data detection for partial response channels
US6185259B1 (en) 1996-06-12 2001-02-06 Ericsson Inc. Transmitter/receiver for GMSK and offset-QAM
FI102578B1 (fi) * 1996-11-27 1998-12-31 Nokia Telecommunications Oy Menetelmä taajuuseron mittaamiseksi ja vastaanotin
US6205183B1 (en) 1998-05-29 2001-03-20 Ericsson Inc. Methods of suppressing reference oscillator harmonic interference and related receivers
US6519300B1 (en) * 1998-11-12 2003-02-11 Ericsson Inc. System and method for automatic frequency correction in a pilot symbol assisted demodulator
US6278867B1 (en) 1998-11-25 2001-08-21 Ericsson Inc. Methods and systems for frequency generation for wireless devices
US6567475B1 (en) 1998-12-29 2003-05-20 Ericsson Inc. Method and system for the transmission, reception and processing of 4-level and 8-level signaling symbols
US6680969B1 (en) 1999-03-22 2004-01-20 Ericsson, Inc. Methods for estimating doppler spreads including autocorrelation function hypotheses and related systems and receivers
US6625236B1 (en) 2000-02-08 2003-09-23 Ericsson Inc. Methods and systems for decoding symbols by combining matched-filtered samples with hard symbol decisions
US6954489B2 (en) * 2001-01-02 2005-10-11 Telefonaktiebolaget L M Ericsson (Publ) Determining correlations of received sequences to multiple known sequences in a communications system
JP3633497B2 (ja) * 2001-03-22 2005-03-30 三菱電機株式会社 周波数誤差推定を行う受信機および周波数誤差の推定方法
CN102316287B (zh) * 2010-07-09 2014-05-07 北京创毅视讯科技有限公司 一种解调模拟电视信号的方法和装置

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4027250A (en) * 1975-10-21 1977-05-31 Lang Gordon R Apparatus and method for reducing effects of amplitude and phase jitter
FR2375773A1 (fr) * 1976-12-23 1978-07-21 Ibm France Procede et dispositif de detection de phase adaptatifs
US4151491A (en) * 1977-09-28 1979-04-24 Harris Corporation Technique for supplying reference for an adaptive equalizer when multiple phase signals are transmitted
FR2428946A1 (fr) * 1978-06-13 1980-01-11 Ibm France Procede et dispositif pour initialiser un egaliseur adaptatif a partir d'un signal de donnees inconnu dans un systeme de transmission utilisant la modulation d'amplitude en quadrature
US4234957A (en) * 1978-12-04 1980-11-18 Gte Automatic Electric Laboratories Incorporated Method and apparatus for generating timing phase error signals in PSK demodulators
FR2468258B1 (fr) * 1979-10-19 1987-06-26 Cit Alcatel Circuit de correction des bruits de phase pour un systeme de transmission
US4466108A (en) * 1981-10-06 1984-08-14 Communications Satellite Corporation TDMA/PSK Carrier synchronization without preamble
FR2525055A1 (fr) * 1982-04-09 1983-10-14 Trt Telecom Radio Electr Procede de correction de frequence de la porteuse locale dans le recepteur d'un systeme de transmission de donnees et recepteur utilisant ce procede
US4578080A (en) * 1982-09-06 1986-03-25 Helal Basil H Joint prostheses
FR2546008B1 (fr) * 1983-05-11 1985-07-12 Labo Electronique Physique Circuit d'egalisation adaptative et de demodulation conjointes
IT1188626B (it) * 1986-03-25 1988-01-20 Gte Telecom Spa Metodo e dispositivo di equalizzazione adattiva cieca
SE462942B (sv) * 1989-01-26 1990-09-17 Ericsson Telefon Ab L M Saett och anordning foer snabb frekvensstyrning av en koherent radiomottagare

Also Published As

Publication number Publication date
FI904710A0 (fi) 1990-09-25
PT92981B (pt) 1997-12-31
NZ232081A (en) 1992-11-25
AU4964490A (en) 1990-08-24
CN1020532C (zh) 1993-05-05
KR910700577A (ko) 1991-03-15
DE69007506D1 (de) 1994-04-28
KR960000608B1 (ko) 1996-01-09
WO1990009070A1 (en) 1990-08-09
DE69007506T2 (de) 1994-06-30
IE900181L (en) 1990-07-26
SG84094G (en) 1994-11-25
EP0381637A1 (en) 1990-08-08
HK78494A (en) 1994-08-12
CA2007973A1 (en) 1990-07-26
SE462943B (sv) 1990-09-17
AU619944B2 (en) 1992-02-06
PT92981A (pt) 1990-07-31
NO903992D0 (no) 1990-09-13
IE64267B1 (en) 1995-07-26
NO301919B1 (no) 1997-12-22
SE8900282D0 (sv) 1989-01-26
MY104867A (en) 1994-06-30
NO903992L (no) 1990-09-13
CA2007973C (en) 1996-11-05
EP0381637B1 (en) 1994-03-23
SE8900282A (es) 1989-01-26
US5093848A (en) 1992-03-03
JPH03503831A (ja) 1991-08-22
DK0381637T3 (da) 1994-08-01
JP2634319B2 (ja) 1997-07-23
ATE103445T1 (de) 1994-04-15
CN1044561A (zh) 1990-08-08

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