AR008906A1 - Metodo y desmodulador para determinar los limites de simbolos en una corriente de datos - Google Patents

Metodo y desmodulador para determinar los limites de simbolos en una corriente de datos

Info

Publication number
AR008906A1
AR008906A1 ARP970105030A ARP970105030A AR008906A1 AR 008906 A1 AR008906 A1 AR 008906A1 AR P970105030 A ARP970105030 A AR P970105030A AR P970105030 A ARP970105030 A AR P970105030A AR 008906 A1 AR008906 A1 AR 008906A1
Authority
AR
Argentina
Prior art keywords
limits
comparison block
signal
demodulator
ratios
Prior art date
Application number
ARP970105030A
Other languages
English (en)
Original Assignee
Discovision Ass
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 Discovision Ass filed Critical Discovision Ass
Publication of AR008906A1 publication Critical patent/AR008906A1/es

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
    • H04L27/2602—Signal structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H04L1/0047—Decoding adapted to other signal detection operation
    • 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
    • H04L25/0202—Channel estimation
    • H04L25/0212—Channel estimation of impulse response
    • H04L25/0214—Channel estimation of impulse response of a single coefficient
    • 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
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
    • H04L25/023—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols
    • H04L25/0232—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols by interpolation between sounding signals
    • 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
    • H04L27/2649—Demodulators
    • H04L27/265—Fourier transform demodulators, e.g. fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators
    • 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
    • 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
    • H04L27/2666—Acquisition of further OFDM parameters, e.g. bandwidth, subcarrier spacing, or guard interval length
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/023—Multiplexing of multicarrier modulation signals
    • H04L5/026—Multiplexing of multicarrier modulation signals using code division
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0071—Use of interleaving

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Television Systems (AREA)

Abstract

Se describe un método y un desmodulador para determinar los límites de intervalos de proteccion y de símbolos de datos que son recibidos en unasenal multiplexada de division de frecuencia ortogonal codificada. Las muestras temporalesseparadas por un intervalo de un intervalo activo deun símbolo de datos se asocian en pares, y se obtienen diferencia de senales. La dispersion de un primer bloque de comparacion de diferencia de senales sedetermina, y se compara con la dispersionde un segundo bloque de comparacion de diferencia de senales, el segundo bloque de comparacion se desplaza delprimer bloque de comparacion por n muestras. Se calcula una proporcion F para las dispersiones de los dos bloques. Se iteran las proporciones F en unasucesion de bloques de comparacion, y una senal que representa las proporciones F se somete a deteccion de picos. Los picos representan loslímites de del intervalo de proteccion de los símbolos. Esta informacion se utiliza para sincronizar una ventana FFT para reconstruccion posterior de lasenal.
ARP970105030A 1996-10-31 1997-10-29 Metodo y desmodulador para determinar los limites de simbolos en una corriente de datos AR008906A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB9622728.5A GB9622728D0 (en) 1996-10-31 1996-10-31 Timing synchronization in a reciever employing orthogonal frequency division mutiplexing

Publications (1)

Publication Number Publication Date
AR008906A1 true AR008906A1 (es) 2000-02-23

Family

ID=10802265

Family Applications (2)

Application Number Title Priority Date Filing Date
ARP970105030A AR008906A1 (es) 1996-10-31 1997-10-29 Metodo y desmodulador para determinar los limites de simbolos en una corriente de datos
ARP970105057A AR008910A1 (es) 1996-10-31 1997-10-30 Receptor digital para senales de multiples portadoras

Family Applications After (1)

Application Number Title Priority Date Filing Date
ARP970105057A AR008910A1 (es) 1996-10-31 1997-10-30 Receptor digital para senales de multiples portadoras

Country Status (13)

Country Link
EP (1) EP0840485B1 (es)
JP (1) JP4142758B2 (es)
KR (1) KR19980033375A (es)
CN (1) CN1181673A (es)
AR (2) AR008906A1 (es)
AT (1) ATE196218T1 (es)
AU (1) AU737361B2 (es)
CA (1) CA2199111A1 (es)
DE (1) DE69703016T2 (es)
GB (2) GB9622728D0 (es)
ID (1) ID19373A (es)
IL (1) IL122020A (es)
SG (1) SG55399A1 (es)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100234329B1 (ko) * 1997-09-30 1999-12-15 윤종용 Ofdm 시스템 수신기의 fft 윈도우 위치 복원장치 및 그 방법_
US6167351A (en) * 1998-03-24 2000-12-26 Tektronix, Inc. Period determination of a periodic signal
JP3850452B2 (ja) * 1998-08-24 2006-11-29 三菱電機株式会社 信号復調装置、およびこの信号復調装置における受信制御方法
KR100510637B1 (ko) * 1998-11-07 2006-02-28 엘지전자 주식회사 Dvb 시스템의 동기 검출 장치
GB2353680A (en) 1999-08-27 2001-02-28 Mitsubishi Electric Inf Tech OFDM frame synchronisation
US6967936B1 (en) * 2000-02-11 2005-11-22 Lucent Technologies Inc. Uplink timing synchronization and access control for a multi-access wireless communication system
EP1128592A3 (en) * 2000-02-23 2003-09-17 NTT DoCoMo, Inc. Multi-carrier CDMA and channel estimation
US6920182B2 (en) 2001-01-09 2005-07-19 Microtune (Texas), L.P. Delta-sigma modulator system and method
KR100425297B1 (ko) * 2001-06-11 2004-03-30 삼성전자주식회사 효율적인 심볼 타이밍 옵셋을 추정하는 ｏｆｄｍ 수신시스템 및 그 방법
CN100379212C (zh) * 2002-01-23 2008-04-02 华为技术有限公司 一种查找表电路的实现方法
US7623599B2 (en) * 2005-11-21 2009-11-24 Freescale Semiconductor, Inc. Blind bandwidth detection for a sample stream
JP2008005389A (ja) * 2006-06-26 2008-01-10 Hitachi Ltd 通信方法および通信装置
US8284825B2 (en) * 2008-06-06 2012-10-09 Maxim Integrated Products, Inc. Blind channel quality estimator
JP2013509770A (ja) 2009-10-30 2013-03-14 バンガー ユニバーシティ 光周波数分割多重送信システムにおける同期プロセス
CN101902677B (zh) * 2010-06-23 2015-01-28 中兴通讯股份有限公司 音频检测装置及方法
KR101121086B1 (ko) * 2010-11-10 2012-03-16 충남대학교산학협력단 유니크 워드 기반 주파수 영역 등화기 기반 단일반송파 방식을 위한 채널 추정 기법
GB2489922A (en) 2011-04-06 2012-10-17 Univ Bangor Synchronising optical OFDM signal with pattern of DC offset levels superimposed upon OFDM symbols
CN117826071B (zh) * 2024-03-06 2024-05-28 成都大公博创信息技术有限公司 基于中频触发实现多采集模块宽带校准的测向系统及方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69427099T2 (de) * 1993-01-20 2001-11-08 Koninkl Philips Electronics Nv Übertragungssystem mit Taktrückgewinnung
GB2278257B (en) * 1993-05-05 1996-10-02 British Broadcasting Corp Receiving equipment for digital transmissions
DE69523365T2 (de) * 1994-05-09 2002-07-04 Victor Company Of Japan Sender und Empfänger für OFDM
SE514986C2 (sv) * 1995-03-01 2001-05-28 Telia Ab Metod och anordning för synkronisering vid OFDM-system
EP0772332A3 (en) * 1995-11-02 2000-10-11 British Broadcasting Corporation Synchronisation of OFDM signals

Also Published As

Publication number Publication date
DE69703016T2 (de) 2001-04-05
ID19373A (id) 1998-07-02
GB2318953A (en) 1998-05-06
AU3991697A (en) 1998-05-07
JPH10150428A (ja) 1998-06-02
IL122020A0 (en) 1998-03-10
ATE196218T1 (de) 2000-09-15
AU737361B2 (en) 2001-08-16
AR008910A1 (es) 2000-02-23
KR19980033375A (ko) 1998-07-25
CA2199111A1 (en) 1998-04-30
SG55399A1 (en) 1998-12-21
JP4142758B2 (ja) 2008-09-03
EP0840485A3 (en) 1998-06-10
EP0840485A2 (en) 1998-05-06
GB9622728D0 (en) 1997-01-08
CN1181673A (zh) 1998-05-13
GB9720550D0 (en) 1997-11-26
DE69703016D1 (de) 2000-10-12
IL122020A (en) 2000-11-21
EP0840485B1 (en) 2000-09-06

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