HUP0001298A2 - Eljárás és berendezés csatornabecsléshez OFDM-elvű továbbító rendszerben - Google Patents

Eljárás és berendezés csatornabecsléshez OFDM-elvű továbbító rendszerben

Info

Publication number
HUP0001298A2
HUP0001298A2 HU0001298A HUP0001298A HUP0001298A2 HU P0001298 A2 HUP0001298 A2 HU P0001298A2 HU 0001298 A HU0001298 A HU 0001298A HU P0001298 A HUP0001298 A HU P0001298A HU P0001298 A2 HUP0001298 A2 HU P0001298A2
Authority
HU
Hungary
Prior art keywords
signal
coded
evaluated
channel
transmission system
Prior art date
Application number
HU0001298A
Other languages
English (en)
Inventor
Hossam H. H'mimy
Original Assignee
Ericsson Inc.
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 Ericsson Inc. filed Critical Ericsson Inc.
Publication of HUP0001298A2 publication Critical patent/HUP0001298A2/hu

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
    • H04L25/0202—Channel estimation
    • H04L25/022—Channel estimation of frequency response
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

A találmány tárgy eljárás jel kiértékelésre győrs jelgyengülésűcsatőrnánál. A találmány szerint az eljárás az alábbi lépésekettartalmazza: - A kódőlt fő jel részt és kódőlt ellenőrző jel részt tartalmazókódőlt OFDM-jelet létrehőzzák (45). - A kódőlt OFDM-jelet a gyengülő jelű csatőrnán keresztül közvetítik(50). - A kódőlt OFDM-jel vételi fő jelét detektálják (72). - A kódőlt OFDM-jel fő jeléhez tartőzó frekvenciaátvitelt kiértékelikaz ellenőrző jelből (74). - A fő jel kiértékelt frekvenciaátvitelét invertálják (95). Akiértékelt csatőrna jelet a kiértékelt frekvenciaátvitel inverzéből ésa detektált vételi fő jelből meghatárőzzák. ŕ
HU0001298A 1997-01-15 1998-01-13 Eljárás és berendezés csatornabecsléshez OFDM-elvű továbbító rendszerben HUP0001298A2 (hu)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/784,193 US5912876A (en) 1997-01-15 1997-01-15 Method and apparatus for channel estimation

Publications (1)

Publication Number Publication Date
HUP0001298A2 true HUP0001298A2 (hu) 2000-08-28

Family

ID=25131639

Family Applications (1)

Application Number Title Priority Date Filing Date
HU0001298A HUP0001298A2 (hu) 1997-01-15 1998-01-13 Eljárás és berendezés csatornabecsléshez OFDM-elvű továbbító rendszerben

Country Status (10)

Country Link
US (1) US5912876A (hu)
EP (1) EP0953247A1 (hu)
CN (1) CN1250566A (hu)
AU (1) AU724517B2 (hu)
BR (1) BR9806881A (hu)
CA (1) CA2277184A1 (hu)
HU (1) HUP0001298A2 (hu)
TW (1) TW387191B (hu)
WO (1) WO1998032268A1 (hu)
ZA (1) ZA98131B (hu)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7339882B2 (en) 2001-03-28 2008-03-04 Robert Bosch Gmbh Method for frame and frequency synchronization of an OFDM signal and method for transmitting an OFDM signal

Families Citing this family (59)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6219377B1 (en) * 1998-06-29 2001-04-17 Legerity, Inc. Method and apparatus for generating tones in a multi-tone modem
US6331975B1 (en) * 1998-10-28 2001-12-18 Texas Instruments Incorporated User data indicator for discontinuous transmission
GB2346520A (en) * 1998-11-09 2000-08-09 Wi Lan Inc Data recovery in an OFDM system exploiting pilot subcarriers
US6952394B1 (en) 1999-05-25 2005-10-04 Samsung Electronics Co., Ltd. Method for transmitting and receiving orthogonal frequency division multiplexing signal and apparatus therefor
JP3303847B2 (ja) * 1999-06-02 2002-07-22 日本電気株式会社 チャネル応答推定回路
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
US6298035B1 (en) 1999-12-21 2001-10-02 Nokia Networks Oy Estimation of two propagation channels in OFDM
JP4284813B2 (ja) * 2000-02-18 2009-06-24 株式会社デンソー Ｏｆｄｍ用受信装置
GB2365715B (en) * 2000-05-15 2004-04-28 Univ Bristol Circuit
US6990061B2 (en) * 2000-05-31 2006-01-24 Interuniversitair Micro-Elektronica Centrum Method and apparatus for channel estimation
US6647078B1 (en) * 2000-06-30 2003-11-11 Motorola, Inc. Method and device for multi-user frequency-domain channel estimation based on gradient optimization techniques
ATE349844T1 (de) * 2000-07-05 2007-01-15 Sony Deutschland Gmbh Kanalschätzer für ein ofdm system
NZ506558A (en) 2000-08-25 2003-04-29 Ind Res Ltd A broadband indoor communication system using ofdm
CN1208910C (zh) * 2000-09-05 2005-06-29 连宇通信有限公司 一种信道估计的方法及实现该方法的***
US6654408B1 (en) 2000-10-27 2003-11-25 Wisconsin Alumni Research Foundation Method and system for multi-carrier multiple access reception in the presence of imperfections
US6947748B2 (en) 2000-12-15 2005-09-20 Adaptix, Inc. OFDMA with adaptive subcarrier-cluster configuration and selective loading
NZ509688A (en) 2001-02-01 2003-06-30 Ind Res Ltd Maximum likelihood sychronisation (estimating time delay) for wireless digital communications system using a pilot symbol
US6990153B1 (en) * 2001-02-06 2006-01-24 Agency For Science, Technology And Research Method and apparatus for semi-blind communication channel estimation
US6882619B1 (en) 2001-02-21 2005-04-19 At&T Corp. Interference suppressing OFDM method for wireless communications
US7158474B1 (en) 2001-02-21 2007-01-02 At&T Corp. Interference suppressing OFDM system for wireless communications
US7027519B2 (en) 2001-02-28 2006-04-11 Mitsubishi Electric Research Laboratories, Inc. Iterative maximum likelihood channel estimation and signal detection for OFDM systems
FR2822567B1 (fr) * 2001-03-22 2003-05-02 Mitsubishi Electric Inf Tech Methode et dispositif d'egalisation de type gmmse
KR100434473B1 (ko) * 2001-05-11 2004-06-05 삼성전자주식회사 직교주파수 분할 다중 시스템에서 채널 복호 장치 및 방법
US7548875B2 (en) 2001-06-27 2009-06-16 John Mikkelsen Media delivery platform
EP1283614A1 (en) * 2001-08-10 2003-02-12 TELEFONAKTIEBOLAGET L M ERICSSON (publ) Channel estimation in a multicarrier transmit diversity system
KR20030014078A (ko) * 2001-08-10 2003-02-15 최승국 엠엠에스이 채널 추정 방식의 오에프디엠 무선 전송 장치
US7031250B2 (en) * 2001-09-27 2006-04-18 Rf Micro Devices, Inc. Method and apparatus for channel estimation
US7209433B2 (en) * 2002-01-07 2007-04-24 Hitachi, Ltd. Channel estimation and compensation techniques for use in frequency division multiplexed systems
US7173991B2 (en) 2002-06-17 2007-02-06 Hitachi, Ltd. Methods and apparatus for spectral filtering channel estimates
US7139340B2 (en) * 2002-06-28 2006-11-21 Hitachi, Ltd. Robust OFDM carrier recovery methods and apparatus
US7161896B1 (en) 2002-08-12 2007-01-09 Cisco Systems Wireless Networking (Australia) Pty Limited Channel estimation in a multicarrier radio receiver
US7397758B1 (en) * 2002-08-12 2008-07-08 Cisco Technology, Inc. Channel tracking in a OFDM wireless receiver
KR100471538B1 (ko) * 2002-09-18 2005-02-21 한기열 오에프디엠 시스템의 채널추정과 심볼동기 타이밍결정장치 및 방법
GB2393618B (en) * 2002-09-26 2004-12-15 Toshiba Res Europ Ltd Transmission signals methods and apparatus
DE10248507A1 (de) * 2002-10-11 2004-04-22 IHP GmbH - Innovations for High Performance Microelectronics/Institut für innovative Mikroelektronik Verfahren und Vorrichtung zur Fehlerkorrektur von Multiplex-Signalen
US20040081131A1 (en) * 2002-10-25 2004-04-29 Walton Jay Rod OFDM communication system with multiple OFDM symbol sizes
AU2003201483A1 (en) * 2003-01-15 2004-08-10 Telefonaktiebolaget Lm Ericsson (Publ) Correlation method for channel estimation for ofdm
DE10304751A1 (de) * 2003-02-05 2004-08-26 Siemens Ag Verfahren zur Übertragung von Daten in einem Mehrträger-Funkkommunikationssystem
DE60301270T2 (de) * 2003-03-27 2006-07-20 Nnt Docomo, Inc. Vorrichtung und verfahren zur schätzung einer mehrzahl von kanälen
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
US20040228417A1 (en) * 2003-05-12 2004-11-18 Mcnc Research And Development Institute Communication system with adaptive channel correction
DE10348205B4 (de) * 2003-10-16 2005-10-27 Infineon Technologies Ag Verfahren zur Kanalschätzung bei Verwendung verschiedener Modulationsverfahren innerhalb eines Signalintervalls
US7437135B2 (en) 2003-10-30 2008-10-14 Interdigital Technology Corporation Joint channel equalizer interference canceller advanced receiver
US20070127355A1 (en) * 2003-12-05 2007-06-07 Koninklijke Philips Electronics N.V. Method and apparatus of noise variance estimation for use in wireless communication systems
US8391413B2 (en) * 2003-12-19 2013-03-05 Qualcomm Incorporated Channel estimation for an OFDM communication system with inactive subbands
US7400692B2 (en) 2004-01-14 2008-07-15 Interdigital Technology Corporation Telescoping window based equalization
CN1677969B (zh) * 2004-03-31 2010-10-13 因芬尼昂技术股份公司 反向兼容传输的改良操作
KR100594084B1 (ko) * 2004-04-30 2006-06-30 삼성전자주식회사 직교 주파수 분할 다중 수신기의 채널 추정 방법 및 채널추정기
TWI279998B (en) * 2004-05-25 2007-04-21 Realtek Semiconductor Corp Adaptive channel estimation method for multi-carrier communication system
CN100372415C (zh) * 2004-09-30 2008-02-27 华为技术有限公司 正交频分复用***中跨小区测量的方法
US7573851B2 (en) 2004-12-07 2009-08-11 Adaptix, Inc. Method and system for switching antenna and channel assignments in broadband wireless networks
ES2306557B1 (es) * 2005-12-23 2009-09-03 Diseño De Sistemas En Silicio, S.A. Procedimiento de transmision y recepcion de señales con diferentes frecuencias de muestreo.
US7801250B2 (en) * 2006-05-24 2010-09-21 General Dynamics Advanced Information Systems, Inc. Low latency analog QAM coherent demodulation algorithm
TWI329435B (en) * 2006-09-13 2010-08-21 Sunplus Technology Co Ltd Channel estimation apparatus with an optimal search and method thereof
EP2103068A2 (en) * 2006-12-07 2009-09-23 Interdigital Technology Corporation Wireless communication method and apparatus for allocating training signals and information bits
US8085873B2 (en) 2007-01-02 2011-12-27 Qualcomm, Incorporated Systems and methods for enhanced channel estimation in wireless communication systems
DE102009033720A1 (de) 2008-07-18 2010-04-29 Technische Universität Ilmenau Verfahren zur Kanalschätzung in Two-Way-Relaying-Systemen mit"Amplify & Forward"- Relays
CN101621338B (zh) * 2009-01-07 2012-01-25 北京邮电大学 一种抗色散的光ofdm接收方法及装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8609711D0 (en) * 1986-04-21 1986-05-29 Clark A P Channel estimation & detection
FR2671923B1 (fr) * 1991-01-17 1993-04-16 France Etat Dispositif de demodulation coherente de donnees numeriques entrelacees en temps et en frequence, a estimation de la reponse frequentielle du canal de transmission et seuillage, et emetteur correspondant.
US5282222A (en) * 1992-03-31 1994-01-25 Michel Fattouche Method and apparatus for multiple access between transceivers in wireless communications using OFDM spread spectrum
DE69523365T2 (de) * 1994-05-09 2002-07-04 Victor Company Of Japan Sender und Empfänger für OFDM
US5767738A (en) * 1996-10-21 1998-06-16 Motorola, Inc. Apparatus and method for demodulating a modulated signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7339882B2 (en) 2001-03-28 2008-03-04 Robert Bosch Gmbh Method for frame and frequency synchronization of an OFDM signal and method for transmitting an OFDM signal

Also Published As

Publication number Publication date
CN1250566A (zh) 2000-04-12
CA2277184A1 (en) 1998-07-23
AU5825098A (en) 1998-08-07
AU724517B2 (en) 2000-09-21
ZA98131B (en) 1998-07-08
US5912876A (en) 1999-06-15
BR9806881A (pt) 2000-04-18
TW387191B (en) 2000-04-11
WO1998032268A1 (en) 1998-07-23
EP0953247A1 (en) 1999-11-03

Similar Documents

Publication Publication Date Title
HUP0001298A2 (hu) Eljárás és berendezés csatornabecsléshez OFDM-elvű továbbító rendszerben
MY130207A (en) Method and apparatus for power estimation in a communication system.
TW344179B (en) Apparatus and method for determining the protocol capability of a network link endpoint
ES2178296T3 (es) Un metodo para la estimacion mejorada de la respuesta de impulso de canal en sistemas tdma.
MY122126A (en) Receiver apparatus, and associated method, for receving a receive signal transmitted upon a channel susceptible to interference
DE69533831T2 (de) Verfahren, system und gerät zur übertragungssteuerung
NO20011907L (no) Fremgangsmåte for overföring av data, samt radiosystem
EP0982903A3 (en) Apparatus and method for conveying TTY signals over wireless telecommunication systems
MX9501609A (es) Aparato y metodo para la modificacion del sonido para usarse en las comunicaciones de voz y datos simultaneos.
ATE266872T1 (de) System zur bestimmung der position eines objekts
WO2000011817A3 (de) Verfahren zur übertragung von informationen sowie ein geeignetes system hierfür
HUP0004241A2 (hu) Helymeghatározó rendszer digitális telefonhálózatokhoz, helymeghatározó rendszert tartalmazó digitális telefonhálózat, kézibeszélő ilyen digitális telefonhálózathoz és eljárás mobil vevőkészülék helyének meghatározására
NO980871L (no) Fremgangsmåte for mottaking, samt mottaker
ES2136197T3 (es) Metodo y aparato para determinar la utilizabilidad de señal.
GB2313193B (en) Method and apparatus for distance measurement
MY120816A (en) Method, apparatus and system for determining a location of a frequency synchronization signal.
KR910002146A (ko) 노이즈 정합 방법 및 수신기
KR850700294A (ko) 적응 에코우 소거기의 기능시험방법
DE69637626D1 (de) Datenübertragungsverfahren, Sender und Empfänger
SE9700308D0 (sv) Förfarande och anordning i ett kommunikationssystem
NO994743D0 (no) FremgangsmÕte for transmisjon, samt radiosystem
HK1036169A1 (en) Apparatus, system and method for improved the dynamic range of a receiver in the presence of a narrowband interfering signal
TW428397B (en) Data transmission apparatus and data transmission system
NO20010313L (no) Estimering av kanalimpulsrespons ved bruk av mottatt signalvarians
EP0892524A3 (en) Communication apparatus, network system using communication apparatus and control method used in network system