BR9908123A - Processo e aparelho para detectar um sinal de sincronização de frequência transmitido do transmissor para o receptor junto com outros sinais - Google Patents

Processo e aparelho para detectar um sinal de sincronização de frequência transmitido do transmissor para o receptor junto com outros sinais

Info

Publication number
BR9908123A
BR9908123A BR9908123-7A BR9908123A BR9908123A BR 9908123 A BR9908123 A BR 9908123A BR 9908123 A BR9908123 A BR 9908123A BR 9908123 A BR9908123 A BR 9908123A
Authority
BR
Brazil
Prior art keywords
transmitter
frequency synchronization
synchronization signal
receiver
signal transmitted
Prior art date
Application number
BR9908123-7A
Other languages
English (en)
Other versions
BR9908123B1 (pt
Inventor
Roozbeh Atarius
Kjell Berthold Gustafsson
Original Assignee
Telefonaktiebolaget Lm Erisson
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 Erisson filed Critical Telefonaktiebolaget Lm Erisson
Publication of BR9908123A publication Critical patent/BR9908123A/pt
Publication of BR9908123B1 publication Critical patent/BR9908123B1/pt

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/26—Circuits for superheterodyne receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2668—Details of algorithms
    • H04L27/2673—Details of algorithms characterised by synchronisation parameters
    • H04L27/2675—Pilot or known symbols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals
    • H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
    • H04L7/042—Detectors therefor, e.g. correlators, state machines

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

"PROCESSO E APARELHO PARA DETECTAR UM SINAL DE SINCRONIZAçãO DE FREQuêNCIA TRANSMITIDO DO TRANSMISSOR PARA O RECEPTOR JUNTO COM OUTROS SINAIS" Em um sistema de comunicação que inclui pelo menos um transmissor e pelo menos um receptor, um sinal de sincronização de freq³ência transmitido do transmissor para o receptor é detectado. Um componente em fase de um sinal recebido pelo receptor está atrasado, e o componente em fase atrasado é multiplicado por um componente de quadratura do sinal recebido. As etapas de atrasar e multiplicar são repetidas para o número predeterminado de amostras do sinal recebido para produzir um valor de correlação cruzada estimada. Uma determinação é feita se o valor de correlação cruzada estimada é pelo menos tão grande quanto um limiar predeterminado, indicando que o sinal transmitido é um sinal de sincronização de freq³ência.
BRPI9908123-7B1A 1998-02-20 1999-02-05 Processo e aparelho para detectar um sinal de sincronização de freqüência transmitido do transmissor para o receptor junto com outros sinais BR9908123B1 (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/026,724 US6226336B1 (en) 1998-02-20 1998-02-20 Method and apparatus for detecting a frequency synchronization signal
PCT/SE1999/000156 WO1999043085A1 (en) 1998-02-20 1999-02-05 Method and apparatus for detecting a frequency synchronization signal

Publications (2)

Publication Number Publication Date
BR9908123A true BR9908123A (pt) 2000-11-14
BR9908123B1 BR9908123B1 (pt) 2013-12-10

Family

ID=21833448

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI9908123-7B1A BR9908123B1 (pt) 1998-02-20 1999-02-05 Processo e aparelho para detectar um sinal de sincronização de freqüência transmitido do transmissor para o receptor junto com outros sinais

Country Status (12)

Country Link
US (1) US6226336B1 (pt)
EP (1) EP1057260B1 (pt)
KR (1) KR100567290B1 (pt)
CN (1) CN1154231C (pt)
AT (1) ATE303017T1 (pt)
AU (1) AU753183B2 (pt)
BR (1) BR9908123B1 (pt)
DE (1) DE69926869T2 (pt)
EE (1) EE200000469A (pt)
HK (1) HK1037432A1 (pt)
MY (1) MY118566A (pt)
WO (1) WO1999043085A1 (pt)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2347286B (en) * 1999-02-26 2001-04-18 Motorola Ltd Frequency tracking loop and method of frequency tracking
AU2820701A (en) * 2000-01-18 2001-07-31 National Research Council Of Canada Parallel correlator archtitecture
US6424673B1 (en) * 2000-11-10 2002-07-23 Motorola, Inc. Method and apparatus in a wireless communication system for facilitating detection of, and synchronization with, a predetermined synchronization signal
CN100461656C (zh) * 2001-12-20 2009-02-11 北京六合万通微电子技术有限公司 同步信号检测电路装置及其该装置检测同步信号的检测方法
WO2003084119A1 (en) * 2002-03-28 2003-10-09 Advanced Micro Devices, Inc. Synchronization data detection unit and method
US7062282B2 (en) * 2002-07-19 2006-06-13 Mediatek, Inc. Method and apparatus for frequency synchronization in a digital transmission system
US7027527B2 (en) * 2002-12-04 2006-04-11 Motorola, Inc. Excess delay spread detection method for multi-carrier communication systems
US20050129149A1 (en) * 2003-12-12 2005-06-16 Kuntz Thomas L. Detecting GSM downlink signal frequency correction burst
US20050238060A1 (en) * 2004-04-23 2005-10-27 Kuntz Thomas L Synchronizing to GSM RF downlink signal frame timing
US7197692B2 (en) * 2004-06-18 2007-03-27 Qualcomm Incorporated Robust erasure detection and erasure-rate-based closed loop power control
JP2009088793A (ja) * 2007-09-28 2009-04-23 Fujitsu Ltd 同期用システム、同期信号送信装置、クロック供給装置、及び同期方法
US9490867B2 (en) 2011-08-16 2016-11-08 Harris Corporation CDMA communications device and related methods
CN102594766B (zh) * 2012-03-30 2015-05-13 福建京奥通信技术有限公司 一种移频机近远端载波同步方法及装置
FR2994367B1 (fr) 2012-08-03 2016-07-15 Thales Sa Procede et systeme de synchronisation
CN104111442B (zh) * 2013-04-16 2017-05-24 中国人民解放军海军702厂 一种克服测向特性曲线零点偏移的正交相关测向电路
US9538537B1 (en) * 2015-08-11 2017-01-03 Phasorlab, Inc. Blind carrier synchronization method for OFDM wireless communication systems
US10397516B2 (en) 2016-04-29 2019-08-27 Ford Global Technologies, Llc Systems, methods, and devices for synchronization of vehicle data with recorded audio
ES2829806T3 (es) 2018-05-08 2021-06-02 Hoefliger Harro Verpackung Dispositivo y procedimiento para acortar a medida la longitud de material de sutura quirúrgica

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3700457C1 (de) * 1987-01-09 1988-06-23 Ant Nachrichtentech Verfahren und Anordnung zur Synchronisation eines Empfaengers bei digitalen UEbertragungssystemen
US5187719A (en) * 1989-01-13 1993-02-16 Hewlett-Packard Company Method and apparatus for measuring modulation accuracy
FR2650456A1 (fr) * 1989-07-28 1991-02-01 Trt Telecom Radio Electr Procede de synchronisation par correlation
US5121414A (en) * 1990-08-09 1992-06-09 Motorola, Inc. Carrier frequency offset equalization
DE4127501A1 (de) * 1990-09-07 1992-03-12 Telefunken Systemtechnik Verfahren zur erkennung der frequenzablage bei digitalen nachrichtenuebertragungen
US5195106A (en) * 1990-11-14 1993-03-16 Motorola, Inc. Method for channel adaptive detecting/equalize
DE4108806C1 (pt) 1991-03-18 1992-01-30 Litef Gmbh, 7800 Freiburg, De
US5177740A (en) * 1991-09-03 1993-01-05 General Electric Company Frame/slot synchronization for U.S. digital cellular TDMA radio telephone system
SE469052B (sv) 1991-09-10 1993-05-03 Ericsson Telefon Ab L M Foerfarande att bilda ett kanalestimat foer en tidsvarierande radiokanal
DE4241882A1 (pt) 1991-12-13 1993-06-17 Clarion Co Ltd
US5402450A (en) 1992-01-22 1995-03-28 Trimble Navigation Signal timing synchronizer
US5276706A (en) 1992-05-20 1994-01-04 Hughes Aircraft Company System and method for minimizing frequency offsets between digital communication stations
US5590160A (en) * 1992-12-30 1996-12-31 Nokia Mobile Phones Ltd. Symbol and frame synchronization in both a TDMA system and a CDMA
JP2741336B2 (ja) * 1993-11-26 1998-04-15 エヌ・ティ・ティ移動通信網株式会社 帯域拡散信号受信機の周波数誤差補正装置
US5455845A (en) 1993-12-10 1995-10-03 Wide Band Systems, Inc. Microwave receiver having coherent threshold detection
JP2731722B2 (ja) * 1994-05-26 1998-03-25 日本電気株式会社 クロック周波数自動制御方式及びそれに用いる送信装置と受信装置
US5623511A (en) * 1994-08-30 1997-04-22 Lucent Technologies Inc. Spread spectrum code pulse position modulated receiver having delay spread compensation
US5684836A (en) 1994-12-22 1997-11-04 Mitsubishi Denki Kabushiki Kaisha Receiver with automatic frequency control
SE514986C2 (sv) * 1995-03-01 2001-05-28 Telia Ab Metod och anordning för synkronisering vid OFDM-system
AU4574596A (en) * 1995-04-19 1996-10-31 Motorola, Inc. Receiver and associated method for timing recovery and frequency estimation
US5654982A (en) * 1995-06-29 1997-08-05 Motorola, Inc. Apparatus and method for determining carrier frequency offset and timing frequency offset for data transmission and reception
CA2214163C (en) * 1996-09-27 2001-07-31 Nec Corporation Method and apparatus for preamble-less demodulation

Also Published As

Publication number Publication date
CN1297611A (zh) 2001-05-30
EE200000469A (et) 2001-12-17
HK1037432A1 (en) 2002-02-08
EP1057260B1 (en) 2005-08-24
CN1154231C (zh) 2004-06-16
BR9908123B1 (pt) 2013-12-10
AU3281399A (en) 1999-09-06
EP1057260A1 (en) 2000-12-06
KR20010041149A (ko) 2001-05-15
DE69926869D1 (de) 2005-09-29
WO1999043085A1 (en) 1999-08-26
US6226336B1 (en) 2001-05-01
KR100567290B1 (ko) 2006-04-04
AU753183B2 (en) 2002-10-10
MY118566A (en) 2004-12-31
DE69926869T2 (de) 2006-06-08
ATE303017T1 (de) 2005-09-15

Similar Documents

Publication Publication Date Title
BR9908123A (pt) Processo e aparelho para detectar um sinal de sincronização de frequência transmitido do transmissor para o receptor junto com outros sinais
MY120849A (en) Methods and apparatuses for synchronization and modulation type detection.
US9088348B2 (en) System and method for obtaining frequency and time synchronization in a wideband communication system
EP1067699A3 (en) Spread spectrum communication system
KR100789921B1 (ko) Ｏｆｄｍ 시스템에서의 프리엠블 패킷 검출 장치 및 그방법
BR9713933A (pt) Processador de faixa base, receptor em um sistema de comunicação digital, receptor de rake, e, processos para processar sìmbolos de informação, para receber os mencionados sìmbolos de informação em um sistema de comunicação digital, para processar sìmbolos de informação e para processar amostras desespalhadas
RU2009135390A (ru) Идентификация разнесения поднесущих
WO2004010603A3 (en) Frequency domain equalization of communication signals
AU2842301A (en) Method and apparatus for estimating a frequency offset by combining pilot symbols and data symbols
WO2007100982A3 (en) Synchronization for ofdm signals
AU2002217075A1 (en) Interference measurements in a wireless communications system
BR9406692A (pt) Processo para determinar a possibilidade de utilização de sinais recebidos em sistema de comunicação aparelho para receptor e receptor
CN101083648A (zh) 正交频分复用接收机、窗口控制装置和窗口控制方法
WO2002076056A3 (de) Verfahren zur frequenz- und zeit-synchronisation eines ofdm-empfängers
EP1054540A3 (en) Null symbol position detecting method, null symbol position detecting apparatus, and receiver
KR920702136A (ko) 고속 수신 신호 세기 표시방법
ATE291297T1 (de) Verfahren und empfänger zur erkennung einer verbindungsherstelllung für datenpakete
NO994743L (no) Fremgangsmåte for transmisjon, samt radiosystem
WO2002080404A3 (en) Method for radio transmitter acquisition
EP0833478A3 (en) Pattern matching apparatus
GB9929328D0 (en) Data processing
KR100392312B1 (en) Tdma system receiver
KR970704308A (ko) 개선된 음을 갖는 전송 시스템
SG148074A1 (en) Ranging system and method
EP1071279A3 (en) Receiver circuit

Legal Events

Date Code Title Description
B09A Decision: intention to grant [chapter 9.1 patent gazette]
B16A Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]

Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 10/12/2013, OBSERVADAS AS CONDICOES LEGAIS.

B21F Lapse acc. art. 78, item iv - on non-payment of the annual fees in time

Free format text: REFERENTE A 21A ANUIDADE.

B24J Lapse because of non-payment of annual fees (definitively: art 78 iv lpi, resolution 113/2013 art. 12)

Free format text: EM VIRTUDE DA EXTINCAO PUBLICADA NA RPI 2552 DE 03-12-2019 E CONSIDERANDO AUSENCIA DE MANIFESTACAO DENTRO DOS PRAZOS LEGAIS, INFORMO QUE CABE SER MANTIDA A EXTINCAO DA PATENTE E SEUS CERTIFICADOS, CONFORME O DISPOSTO NO ARTIGO 12, DA RESOLUCAO 113/2013.