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BR0208133A - Método para a sincronização de frequência e tempo de um receptor ofdm - Google Patents

Método para a sincronização de frequência e tempo de um receptor ofdm

Info

Publication number
BR0208133A
BR0208133A BR0208133-4A BR0208133A BR0208133A BR 0208133 A BR0208133 A BR 0208133A BR 0208133 A BR0208133 A BR 0208133A BR 0208133 A BR0208133 A BR 0208133A
Authority
BR
Brazil
Prior art keywords
frequency
ofdm signal
receiver
time
ofdm
Prior art date
Application number
BR0208133-4A
Other languages
English (en)
Inventor
Rainer Bott
Guenter Wicker
Dimitri Korobkov
Original Assignee
Rohde & Schwarz & Schwarz Gmbh
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 Rohde & Schwarz & Schwarz Gmbh filed Critical Rohde & Schwarz & Schwarz Gmbh
Publication of BR0208133A publication Critical patent/BR0208133A/pt

Links

Classifications

    • 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
    • H04L27/2662—Symbol synchronisation
    • H04L27/2663—Coarse synchronisation, e.g. by correlation
    • 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
    • H04L27/2657—Carrier synchronisation
    • H04L27/2659—Coarse or integer frequency offset determination and synchronisation
    • 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
    • H04L27/2657—Carrier synchronisation
    • H04L27/266—Fine or fractional frequency offset determination and synchronisation
    • 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
    • H04L27/2662—Symbol synchronisation
    • H04L27/2665—Fine synchronisation, e.g. by positioning the FFT window
    • 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
    • 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
    • H04L27/2676—Blind, i.e. without using known symbols

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Synchronizing For Television (AREA)
  • Stereo-Broadcasting Methods (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

"MéTODO PARA A SINCRONIZAçãO DE FREQUêNCIA E TEMPO DE UM RECEPTOR OFDM". A presente invenção se relaciona com a sincronização de tempo e frequência de um receptor (E) para recebimento de sinais OFDM em um portador de frequência fixa. O método da invenção é caracterizado pela determinação, em um primeiro estágio, do valor nominal aproximado da frequência e do tempo do sinal OFDM de origem via um modo de busca frequência-tempo bi-dimensional e a determinação da área com o critério de qualidade ótima do sinal OFDM ou via a avaliação de uma sequência de sincronização transmitida pelo transmissor. Em uma segunda etapa subsequente, a fase de pelo menos um dos sinais piloto transmitido juntamente com o sinal OFDM é determinado em um receptor (E) e é calculada a média através de diversos blocos de sinal OFDM; e um valor nominal mais exato da frequência e do tempo do sinal OFDM de origem é calculado a partir do mesmo. O receptor (E) é então sincronizado com a frequência assim calculada e o sinal OFDM é demodulado com o valor de tempo da origem assim calculado.
BR0208133-4A 2001-03-16 2002-01-29 Método para a sincronização de frequência e tempo de um receptor ofdm BR0208133A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10112773A DE10112773B4 (de) 2001-03-16 2001-03-16 Verfahren zur Frequenz- und Zeit-Synchronisation eines OFDM-Empfängers
PCT/EP2002/000906 WO2002076056A2 (de) 2001-03-16 2002-01-29 Verfahren zur frequenz- und zeit-synchronisation eines ofdm-empfängers

Publications (1)

Publication Number Publication Date
BR0208133A true BR0208133A (pt) 2004-03-02

Family

ID=7677764

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0208133-4A BR0208133A (pt) 2001-03-16 2002-01-29 Método para a sincronização de frequência e tempo de um receptor ofdm

Country Status (13)

Country Link
US (1) US20050084023A1 (pt)
EP (1) EP1368945B1 (pt)
CN (1) CN1531808A (pt)
AU (1) AU2002247663B2 (pt)
BR (1) BR0208133A (pt)
CZ (1) CZ304589B6 (pt)
DE (1) DE10112773B4 (pt)
ES (1) ES2640744T3 (pt)
IL (2) IL157930A0 (pt)
NO (1) NO339435B1 (pt)
PT (1) PT1368945T (pt)
WO (1) WO2002076056A2 (pt)
ZA (1) ZA200306893B (pt)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10039902B4 (de) * 2000-08-16 2011-04-28 Rohde & Schwarz Gmbh & Co. Kg Verfahren zur Frequenz- und Zeit-Synchronisation eines Empfängers
DE10249413B4 (de) * 2002-10-23 2005-10-20 Rohde & Schwarz Verfahren zum Erfassen des Beginns eines aktiven Signalabschnitts
CN1635725B (zh) * 2003-12-31 2010-04-14 华为技术有限公司 一种正交频分复用系统中实现同步的方法
KR100587310B1 (ko) * 2004-08-18 2006-06-08 엘지전자 주식회사 주파수 동기 장치 및 이를 적용한 ｄｖｂ-ｈ 수신 시스템
US7639749B2 (en) * 2004-12-14 2009-12-29 Ittiam Systems (P) Ltd. System and method for improving the performance of OFDM systems
KR100899749B1 (ko) * 2005-01-13 2009-05-27 삼성전자주식회사 다중 입력 다중 출력 방식을 사용하는 직교 주파수 분할 다중 통신시스템에서 프리앰블 시퀀스 송수신 방법
KR101307323B1 (ko) 2005-03-02 2013-09-10 로오데운트쉬바르츠게엠베하운트콤파니카게 동기 잔류측파대 프레임 슬라이싱을 이용한 ａｔｓｃ네트워크의 인핸스먼트 제공을 위한 장치, 그 시스템, 및그 방법
US7573965B2 (en) * 2005-12-12 2009-08-11 Sandbridge Technologies Inc. Kalman filter for channel estimation in OFDM systems
BRPI0807135B1 (pt) 2007-02-01 2020-09-24 Rohde & Schwarz Gmbh & Co. Kg Aparelho e método para fazer uma estrutura de dados ser emitida em uma interface aérea de uma antena e meio legível por computador não transitório
DE102008017290A1 (de) 2007-12-11 2009-06-18 Rohde & Schwarz Gmbh & Co. Kg Verfahren und Vorrichtung zur Bildung eines gemeinsamen Datenstroms insbesondere nach dem ATSC-Standard
DE102007059959B4 (de) 2007-12-12 2020-01-02 Rohde & Schwarz Gmbh & Co. Kg Verfahren und System zur Übertragung von Daten zwischen einer zentralen Rundfunkstation und mindestens einem Sender
DE102008056703A1 (de) * 2008-07-04 2010-01-07 Rohde & Schwarz Gmbh & Co. Kg Verfahren und System zur Zeitsynchronisierung zwischen einer Zentrale und mehreren Sendern
US8355458B2 (en) 2008-06-25 2013-01-15 Rohde & Schwarz Gmbh & Co. Kg Apparatus, systems, methods and computer program products for producing a single frequency network for ATSC mobile / handheld services
DE102008059028B4 (de) 2008-10-02 2021-12-02 Rohde & Schwarz GmbH & Co. Kommanditgesellschaft Verfahren und Vorrichtung zur Erzeugung eines Transportdatenstroms mit Bilddaten
US8774069B2 (en) 2008-11-06 2014-07-08 Rohde & Schwarz Gmbh & Co. Kg Method and system for synchronized mapping of data packets in an ATSC data stream
CN101420411B (zh) * 2008-12-05 2011-02-09 航天恒星科技有限公司 低信噪比载波快速捕获方法
US8982745B2 (en) 2009-03-21 2015-03-17 Rohde & Schwarz Gmbh & Co. Kg Method for improving the data rate of mobile/handheld data and the quality of channel estimation in an ATSC-M/H transport data stream
DE102009025219A1 (de) 2009-04-07 2010-10-14 Rohde & Schwarz Gmbh & Co. Kg Verfahren und Vorrichtung zur kontinuierlichen Anpassung von Kodierungsparametern an eine veränderliche Nutzdatenrate
DE102009057363B4 (de) 2009-10-16 2013-04-18 Rohde & Schwarz Gmbh & Co. Kg Verfahren und Vorrichtung zur effizienten Übertragung von überregional und regional auszustrahlenden Programm-und Servicedaten
US8989021B2 (en) 2011-01-20 2015-03-24 Rohde & Schwarz Gmbh & Co. Kg Universal broadband broadcasting

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GB9020170D0 (en) * 1990-09-14 1990-10-24 Indep Broadcasting Authority Orthogonal frequency division multiplexing
DE4319769C1 (de) * 1993-06-15 1994-07-14 Grundig Emv Verfahren und Anordnung zur Einstellung der lokalen Oszillatoren eines Empfängers in einem Mehrkanalübertragungssystem
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DE19903367A1 (de) * 1999-01-28 2000-08-17 Siemens Ag Verfahren zum Synchronisieren von Sender und Empfänger bei einer Datenübertragung mit einem Mehrträgerfrequenzverfahren über Energieversorgungsleitungen
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KR100362571B1 (ko) * 1999-07-05 2002-11-27 삼성전자 주식회사 직교주파수분할다중 시스템에서 파일럿 심볼을 이용한 주파수 오류 보상장치 및 방법

Also Published As

Publication number Publication date
IL157930A0 (en) 2004-03-28
ZA200306893B (en) 2004-09-03
WO2002076056A3 (de) 2003-01-09
CZ20032495A3 (en) 2004-04-14
AU2002247663B2 (en) 2007-01-04
PT1368945T (pt) 2017-11-14
CN1531808A (zh) 2004-09-22
DE10112773B4 (de) 2012-09-20
ES2640744T3 (es) 2017-11-06
EP1368945A2 (de) 2003-12-10
IL157930A (en) 2009-08-03
WO2002076056A2 (de) 2002-09-26
US20050084023A1 (en) 2005-04-21
NO339435B1 (no) 2016-12-12
NO20034111D0 (no) 2003-09-16
NO20034111L (no) 2003-11-17
EP1368945B1 (de) 2017-08-02
CZ304589B6 (cs) 2014-07-23
DE10112773A1 (de) 2002-09-26

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Legal Events

Date Code Title Description
B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B09B Patent application refused [chapter 9.2 patent gazette]

Free format text: INDEFIRO O PEDIDO DE ACORDO COM O ART. 8O COMBINADO COM ART. 13 DA LPI

B12B Appeal against refusal [chapter 12.2 patent gazette]
B11D Dismissal acc. art. 38, par 2 of ipl - failure to pay fee after grant in time