FI931017A - Mottagande av ortogonalt frekvensdivisionsmultiplexerade signaler - Google Patents

Mottagande av ortogonalt frekvensdivisionsmultiplexerade signaler Download PDF

Info

Publication number
FI931017A
FI931017A FI931017A FI931017A FI931017A FI 931017 A FI931017 A FI 931017A FI 931017 A FI931017 A FI 931017A FI 931017 A FI931017 A FI 931017A FI 931017 A FI931017 A FI 931017A
Authority
FI
Finland
Prior art keywords
samples
demodulated
pct
values
complex
Prior art date
Application number
FI931017A
Other languages
English (en)
Other versions
FI931017A0 (fi
Inventor
Jeffrey John Gledhill
Santosh Vasudev Anikhindi
Peter Anthony Avon
Original Assignee
Nat Transcommunications Ltd
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 Nat Transcommunications Ltd filed Critical Nat Transcommunications Ltd
Publication of FI931017A publication Critical patent/FI931017A/fi
Publication of FI931017A0 publication Critical patent/FI931017A0/fi

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2383—Channel coding or modulation of digital bit-stream, e.g. QPSK modulation
    • 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
    • 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
    • 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
    • H04L27/2668—Details of algorithms
    • H04L27/2673—Details of algorithms characterised by synchronisation parameters
    • H04L27/2676—Blind, i.e. without using known symbols
    • H04L27/2679—Decision-aided
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
    • H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/0803—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division using frequency interleaving, e.g. with precision offset

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Radio Relay Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Control Of Electric Motors In General (AREA)
  • Stereo-Broadcasting Methods (AREA)
  • Radio Transmission System (AREA)
  • Noise Elimination (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Optical Communication System (AREA)
FI931017A 1990-09-14 1993-03-08 Mottagande av ortogonalt frekvensdivisionsmultiplexerade signaler FI931017A0 (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB909020170A GB9020170D0 (en) 1990-09-14 1990-09-14 Orthogonal frequency division multiplexing
PCT/GB1991/001571 WO1992005646A1 (en) 1990-09-14 1991-09-13 Reception of orthogonal frequency division multiplexed signals

Publications (2)

Publication Number Publication Date
FI931017A true FI931017A (fi) 1993-03-08
FI931017A0 FI931017A0 (fi) 1993-03-08

Family

ID=10682242

Family Applications (1)

Application Number Title Priority Date Filing Date
FI931017A FI931017A0 (fi) 1990-09-14 1993-03-08 Mottagande av ortogonalt frekvensdivisionsmultiplexerade signaler

Country Status (12)

Country Link
US (1) US5345440A (fi)
EP (1) EP0548205B1 (fi)
JP (1) JPH06501357A (fi)
KR (1) KR100199467B1 (fi)
AT (1) ATE160475T1 (fi)
AU (1) AU646298B2 (fi)
CA (1) CA2085728A1 (fi)
DE (1) DE69128252T2 (fi)
FI (1) FI931017A0 (fi)
GB (1) GB9020170D0 (fi)
HK (1) HK1004359A1 (fi)
WO (1) WO1992005646A1 (fi)

Families Citing this family (76)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE37802E1 (en) 1992-03-31 2002-07-23 Wi-Lan Inc. Multicode direct sequence spread spectrum
FR2693861A1 (fr) * 1992-07-16 1994-01-21 Philips Electronique Lab Récepteur de signaux à répartition multiplexée de fréquences orthogonales muni d'un dispositif de synchronisation de fréquences.
US5376894A (en) * 1992-12-31 1994-12-27 Pacific Communication Sciences, Inc. Phase estimation and synchronization using a PSK demodulator
FR2701178A1 (fr) * 1993-02-03 1994-08-05 Philips Electronique Lab Système de communication par étalement de spectre à multiutilisateurs.
GB2278257B (en) * 1993-05-05 1996-10-02 British Broadcasting Corp Receiving equipment for digital transmissions
SE500986C2 (sv) * 1993-07-20 1994-10-17 Telia Ab Förfarande och anordning för synkronisering i digitalt transmissionssystem av typen OFDM
JPH0746217A (ja) * 1993-07-26 1995-02-14 Sony Corp ディジタル復調装置
US5675572A (en) * 1993-07-28 1997-10-07 Sony Corporation Orthogonal frequency division multiplex modulation apparatus and orthogonal frequency division multiplex demodulation apparatus
JP3041175B2 (ja) * 1993-11-12 2000-05-15 株式会社東芝 Ｏｆｄｍ同期復調回路
DE4341211C1 (de) * 1993-12-03 1995-04-20 Grundig Emv Verfahren und Schaltungsanordnung zum Einfügen von Daten in ein Übertragungssignal
DE69427024T2 (de) * 1993-12-03 2001-10-18 Koninkl Philips Electronics Nv Digitales vermittlungssystem und empfänger zur verwendung darin
SE501608C2 (sv) * 1994-01-18 1995-03-27 Telia Ab Förfarande och arrangemang för synkronisering vid OFDM- modulering
WO1995020848A1 (en) * 1994-01-28 1995-08-03 Philips Electronics N.V. Digital transmission system
EP0682426B1 (en) * 1994-05-09 2001-10-24 Victor Company Of Japan, Limited OFDM transmitter and receiver
US5657313A (en) * 1994-05-09 1997-08-12 Victor Company Of Japan, Ltd. Signal transmitting apparatus and signal receiving apparatus using orthogonal frequency division multiplexing
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
US5627863A (en) * 1994-07-15 1997-05-06 Amati Communications Corporation Frame synchronization in multicarrier transmission systems
GB9418514D0 (en) * 1994-09-14 1994-11-02 At & T Global Inf Solution Information transmission system
US6334219B1 (en) * 1994-09-26 2001-12-25 Adc Telecommunications Inc. Channel selection for a hybrid fiber coax network
US6282683B1 (en) * 1994-09-26 2001-08-28 Adc Telecommunications, Inc. Communication system with multicarrier telephony transport
DE4441566A1 (de) * 1994-11-23 1996-05-30 Bosch Gmbh Robert Verfahren zur digitalen Frequenzkorrektur bei Mehrträgerübertragungsverfahren
SE504787C2 (sv) * 1994-12-14 1997-04-28 Hd Divine Ab Metod vid OFDM-mottagning för korrigering av frekvens, tidsfönster, samplingsklocka och långsamma fasvariationer
US5682376A (en) * 1994-12-20 1997-10-28 Matsushita Electric Industrial Co., Ltd. Method of transmitting orthogonal frequency division multiplex signal, and transmitter and receiver employed therefor
USRE42236E1 (en) 1995-02-06 2011-03-22 Adc Telecommunications, Inc. Multiuse subcarriers in multipoint-to-point communication using orthogonal frequency division multiplexing
US7280564B1 (en) 1995-02-06 2007-10-09 Adc Telecommunications, Inc. Synchronization techniques in multipoint-to-point communication using orthgonal frequency division multiplexing
SE514986C2 (sv) * 1995-03-01 2001-05-28 Telia Ab Metod och anordning för synkronisering vid OFDM-system
US5537398A (en) * 1995-05-12 1996-07-16 Motorola, Inc. Apparatus for multi-rate simulcast communications
JP3079950B2 (ja) * 1995-06-20 2000-08-21 松下電器産業株式会社 直交周波数分割多重変調信号の受信装置及び伝送方法
US5726978A (en) * 1995-06-22 1998-03-10 Telefonaktiebolaget L M Ericsson Publ. Adaptive channel allocation in a frequency division multiplexed system
FI99252C (fi) * 1995-07-03 1997-12-29 Nokia Mobile Phones Ltd Yhdistetty radiosignaalin modulointi- ja monikäyttömenetelmä
US5790516A (en) * 1995-07-14 1998-08-04 Telefonaktiebolaget Lm Ericsson Pulse shaping for data transmission in an orthogonal frequency division multiplexed system
KR100457987B1 (ko) * 1995-08-16 2005-01-26 코닌클리케 필립스 일렉트로닉스 엔.브이. 심볼처리가향상된전송시스템및수신기
JPH09130362A (ja) * 1995-10-30 1997-05-16 Sony Corp 受信装置および受信方法
JP2803614B2 (ja) * 1995-12-22 1998-09-24 日本電気株式会社 移動中継装置
DE69711957T2 (de) * 1996-02-02 2002-09-19 Thomson Brandt Gmbh Verfahren und Einrichtung zum Empfang von Mehrträgersignalen
WO1997041672A1 (en) * 1996-04-29 1997-11-06 Philips Electronics N.V. Symbol synchronisation in a multicarrier receiver
SE518137C2 (sv) * 1996-06-18 2002-09-03 Telia Ab Pulsformning och utjämning i multipelsystem med ortogonal frekvensindelning
CA2183140C (en) * 1996-08-12 2001-11-20 Grant Mcgibney Ofdm timing and frequency recovery system
US6192068B1 (en) 1996-10-03 2001-02-20 Wi-Lan Inc. Multicode spread spectrum communications system
KR100238047B1 (ko) * 1997-02-25 2000-01-15 윤종용 직교 주파수분할 다중화 전송시스템의 반송파 주파수 동기 방법 및 동기 장치
SE9703629L (sv) * 1997-03-03 1998-09-04 Telia Ab Förbättringar av, eller med avseende på, synkronisering
GB9707517D0 (en) * 1997-04-14 1997-06-04 Nds Ltd Improvements in or relating to receiver synchronisation
JPH10308717A (ja) * 1997-05-02 1998-11-17 Sony Corp 受信装置および受信方法
JP3568180B2 (ja) 1997-06-12 2004-09-22 株式会社日立国際電気 データ伝送装置
US6151296A (en) * 1997-06-19 2000-11-21 Qualcomm Incorporated Bit interleaving for orthogonal frequency division multiplexing in the transmission of digital signals
US6064692A (en) 1997-06-20 2000-05-16 Amati Communications Corporation Protocol for transceiver initialization
DE19738780A1 (de) * 1997-09-04 1999-03-11 Thomson Brandt Gmbh Verfahren und Schaltungsanordnung zur Korrektur von Phasen- und/oder Frequenzfehlern digitaler Multicarrier-Signale
US6546055B1 (en) 1998-01-12 2003-04-08 The Board Of Trustees Of The Leland Stanford Junior University Carrier offset determination for RF signals having a cyclic prefix
US6151295A (en) * 1998-02-26 2000-11-21 Wavesat Telecom Inc. OFDM receiving system
CN1120602C (zh) * 1998-04-14 2003-09-03 弗兰霍菲尔运输应用研究公司 多载波解调系统中精细频率同步化的方法及装置
ES2169511T3 (es) 1998-04-14 2002-07-01 Fraunhofer Ges Forschung Correccion de desviacion de fase de eco en un sistema de demodulacion de multiportadora.
IT1305147B1 (it) * 1998-10-30 2001-04-10 Sisvel Spa Metodo per la sincronizzazione di sistemi di tramissione e ricezionea portanti multiple ed apparecchio utilizzante il suddetto metodo.
EP1028564B1 (en) 1999-02-11 2010-04-07 Motorola, Inc. Estimation of carrier and sampling frequency offsets in multicarrier receivers
US6539063B1 (en) 1999-02-18 2003-03-25 Ibiquity Digital Corporation System and method for recovering symbol timing offset and carrier frequency error in an OFDM digital audio broadcast system
US6768714B1 (en) 1999-06-23 2004-07-27 At&T Wireless Services, Inc. Methods and apparatus for use in obtaining frequency synchronization in an OFDM communication system
US6700866B1 (en) 1999-06-23 2004-03-02 At&T Wireless Services, Inc. Methods and apparatus for use in obtaining frequency synchronization in an OFDM communication system
US6505037B1 (en) * 1999-06-29 2003-01-07 Sharp Laboratories Of America, Inc. Data unit detection including antenna diversity
US6859504B1 (en) 1999-06-29 2005-02-22 Sharp Laboratories Of America, Inc. Rapid settling automatic gain control with minimal signal distortion
JP3715141B2 (ja) * 1999-07-13 2005-11-09 松下電器産業株式会社 通信端末装置
US6452377B1 (en) * 1999-11-12 2002-09-17 Itt Manufacturing Enterprises, Inc. Phase meter using a permuter and matched filter
US6441601B1 (en) * 1999-11-12 2002-08-27 Itt Manufacturing Enterprises, Inc. Phase meter using a permuter
DE10039902B4 (de) 2000-08-16 2011-04-28 Rohde & Schwarz Gmbh & Co. Kg Verfahren zur Frequenz- und Zeit-Synchronisation eines Empfängers
US20020065047A1 (en) * 2000-11-30 2002-05-30 Moose Paul H. Synchronization, channel estimation and pilot tone tracking system
US6778622B2 (en) * 2000-12-18 2004-08-17 Schlumberger Technology Corporation Estimating timing error in samples of a discrete multitone modulated signal
US20020160737A1 (en) * 2001-03-06 2002-10-31 Magis Networks, Inc. Method and apparatus for diversity antenna branch selection
DE10112773B4 (de) * 2001-03-16 2012-09-20 Rohde & Schwarz Gmbh & Co Kg Verfahren zur Frequenz- und Zeit-Synchronisation eines OFDM-Empfängers
US7346135B1 (en) 2002-02-13 2008-03-18 Marvell International, Ltd. Compensation for residual frequency offset, phase noise and sampling phase offset in wireless networks
DE10217879A1 (de) * 2002-04-22 2003-11-13 Ingbuero Ludwig Schaeffler Verfahren und Vorrichtung zum Aufteilen eines vorgegebenen Frequenzbandes, Verfahren und Vorrichtung zur Kanalmodulation, Verfahren und Vorrichtung zur Kanaldemodulation
US7577122B1 (en) * 2002-06-18 2009-08-18 Richard Douglas Schultz Method for minimizing receive packet processing for a personal computer implementation of a wireless local area network adapter
ES2212744B2 (es) 2003-01-10 2005-03-16 Diseño De Sistemas En Silicio, S.A. Procedimiento de sincronizacion en el dominio del tiempo y de la frecuencia de multiples equipos en un sistema de transmision con modulacion ofdm.
US7218693B2 (en) * 2003-05-08 2007-05-15 Texas Instruments Incorporated Method and apparatus for channel estimation in a packet based transmission system having reduced complexity
CN1330193C (zh) * 2003-11-20 2007-08-01 中兴通讯股份有限公司 一种用于差分偏移四相键控解调器的位同步装置
US7778361B1 (en) * 2005-08-17 2010-08-17 Texas Instruments Incorporated Feed forward method for NICAM decode
GB2434725B (en) * 2006-01-26 2008-06-04 Toshiba Res Europ Ltd Methods for data transmission
US10277443B2 (en) * 2009-08-25 2019-04-30 Electronics And Telecommunications Research Institute Method and apparatus for generating/transmitting a frame for wireless communication, and synchronization estimation method for wireless communication
KR20230144702A (ko) 2022-04-07 2023-10-17 주식회사 현대에버다임 미분무 소화 시스템

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61129936A (ja) * 1984-11-29 1986-06-17 Toshiba Corp デ−タ再生回路
FR2609228B1 (fr) * 1986-12-24 1989-12-01 France Etat Procede de diffusion numerique dans des canaux de television
GB2213684A (en) * 1987-12-11 1989-08-16 Philips Electronic Associated Data demodulator baud clock phase locking
US5063574A (en) * 1990-03-06 1991-11-05 Moose Paul H Multi-frequency differentially encoded digital communication for high data rate transmission through unequalized channels
FR2660131B1 (fr) * 1990-03-23 1992-06-19 France Etat Dispositif de transmissions de donnees numeriques a au moins deux niveaux de protection, et dispositif de reception correspondant.

Also Published As

Publication number Publication date
US5345440A (en) 1994-09-06
AU8613691A (en) 1992-04-15
JPH06501357A (ja) 1994-02-10
DE69128252D1 (de) 1998-01-02
GB9020170D0 (en) 1990-10-24
AU646298B2 (en) 1994-02-17
FI931017A0 (fi) 1993-03-08
EP0548205B1 (en) 1997-11-19
ATE160475T1 (de) 1997-12-15
CA2085728A1 (en) 1991-10-17
HK1004359A1 (en) 1998-11-20
WO1992005646A1 (en) 1992-04-02
DE69128252T2 (de) 1998-05-20
EP0548205A1 (en) 1993-06-30
KR100199467B1 (ko) 1999-06-15

Similar Documents

Publication Publication Date Title
FI931017A (fi) Mottagande av ortogonalt frekvensdivisionsmultiplexerade signaler
FR2670062B1 (fr) Procede de recalage des oscillateurs locaux d'un recepteur et dispositif pour la mise en óoeuvre du procede.
ATE112905T1 (de) Digitaler empfänger mit unter-nyquistabtastrate.
FR2349244A1 (fr) Systeme de correction d'instabilite de phase et de decalage de frequence pour modulation d'amplitude en quadrature
JPS5817434B2 (ja) シユトシテ （ オメガサドウシステム ） ニモチイル ムセンホウイソクテイデンパニタイスル デンパコウホウイソウホセイチノ デンソウ
ATE438960T1 (de) Drahtlose spreizspektrumkommunikation mit präambel sondierungslücke
KR880013334A (ko) 수 신 장 치
FR2394922A1 (fr) Demodulateur coherent
CA2085122A1 (en) Demodulation reference signal source
FR2706711B1 (fr) Procédé et dispositif de démodulation de signal numérique.
KR840001412A (ko) 등기 포락선 검파기
GB1449866A (en) System for detecting a digital phase-modulated wave
NO930911L (no) Mottaking av frekvensdelte, ortogonale multiplekssignaler
JPS55115752A (en) Synchronizing system for digital radio communication
FR2545667B1 (fr) Boucle a verrouillage de phase et dispositif de demodulation de signaux modules en frequence comprenant une telle boucle
JPS61182317A (ja) 自動周波数制御装置
JPS5393718A (en) Interference detecting system for multi-phase modulation same frequencyband polarized wave sharing communication
KR880013332A (ko) 무선수신기 및 if 주파수 유지방법
JPS5617573A (en) Transmitting/receiving system for facsimile signal
SU617852A1 (ru) Устройство дл измерени неравномерности группового времени запаздывани каналов св зи
JPS54558A (en) Modulation and demodulation system
THORNHILL Fine synchronization of coherent frequency hopping signals[Final Report]
JPS5358753A (en) Automatic phase control device for carrier wave
JPS573434A (en) Phase synchronism detector
Efthymoglou et al. Acquisition Performance of a Digital DS CDMA Receiver in a LEO Satellite Channel