HK1199681A1 - Synchronization time difference measurements in ofdm systems ofdm - Google Patents

Synchronization time difference measurements in ofdm systems ofdm

Info

Publication number
HK1199681A1
HK1199681A1 HK15100054.6A HK15100054A HK1199681A1 HK 1199681 A1 HK1199681 A1 HK 1199681A1 HK 15100054 A HK15100054 A HK 15100054A HK 1199681 A1 HK1199681 A1 HK 1199681A1
Authority
HK
Hong Kong
Prior art keywords
ofdm
time difference
synchronization time
difference measurements
systems
Prior art date
Application number
HK15100054.6A
Other languages
English (en)
Chinese (zh)
Inventor
羅伯特‧巴爾德麥爾
穆哈姆德‧卡茲米
本特‧林多夫
Original Assignee
Optis Wireless Technology Llc
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 Optis Wireless Technology Llc filed Critical Optis Wireless Technology Llc
Publication of HK1199681A1 publication Critical patent/HK1199681A1/xx

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
    • 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
    • H04L27/2678—Blind, i.e. without using known symbols using cyclostationarities, e.g. cyclic prefix or postfix
    • 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
    • H04L27/2681—Details of algorithms characterised by constraints
    • H04L27/2688—Resistance to perturbation, e.g. noise, interference or fading
    • 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
    • H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
    • H04L27/2695—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation with channel estimation, e.g. determination of delay spread, derivative or peak tracking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0077—Transmission or use of information for re-establishing the radio link of access information of target access point
    • 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
    • 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
    • H04L25/0216—Channel estimation of impulse response with estimation of channel length
    • 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
    • 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
    • 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
    • H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
    • H04L27/2607—Cyclic extensions
    • 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
    • H04L27/261—Details of reference signals
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
HK15100054.6A 2007-04-30 2015-01-05 Synchronization time difference measurements in ofdm systems ofdm HK1199681A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0701043 2007-04-30

Publications (1)

Publication Number Publication Date
HK1199681A1 true HK1199681A1 (en) 2015-11-06

Family

ID=39925912

Family Applications (1)

Application Number Title Priority Date Filing Date
HK15100054.6A HK1199681A1 (en) 2007-04-30 2015-01-05 Synchronization time difference measurements in ofdm systems ofdm

Country Status (8)

Country Link
US (1) US8102754B2 (fr)
EP (1) EP2140646B1 (fr)
JP (1) JP5309133B2 (fr)
CN (2) CN103929392A (fr)
ES (1) ES2478011T3 (fr)
HK (1) HK1199681A1 (fr)
RU (1) RU2463746C2 (fr)
WO (1) WO2008133567A1 (fr)

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8134938B2 (en) * 2007-05-09 2012-03-13 Lg Electronics Delay control in a mobile communication system
KR100904533B1 (ko) * 2008-01-11 2009-06-25 엘지전자 주식회사 전송 타이밍 조절 방법, 연속적인 패킷 전송 방법 및 이동통신 단말
WO2009134103A2 (fr) * 2008-04-30 2009-11-05 엘지전자 주식회사 Procédé de transmission d'informations système et structure de sous-trame
US20100067604A1 (en) * 2008-09-17 2010-03-18 Texas Instruments Incorporated Network multiple antenna transmission employing an x2 interface
US8693442B2 (en) 2008-09-22 2014-04-08 Blackberry Limited Multi-site MIMO cooperation in cellular network
US8774230B2 (en) * 2009-04-08 2014-07-08 Qualcomm Incorporated Conveying synchronization stratum information
JP2011004099A (ja) * 2009-06-18 2011-01-06 Fujitsu Ltd 移動通信システムの移動局、送信タイミング調整装置、送信タイミング調整方法
JP4918580B2 (ja) * 2009-08-27 2012-04-18 株式会社エヌ・ティ・ティ・ドコモ 無線基地局、移動局、移動通信方法及び測定方法
WO2011075867A1 (fr) * 2009-12-23 2011-06-30 Telefonaktiebolaget L M Ericsson (Publ) Synchronisation de station de base
EP2567583B1 (fr) * 2010-05-06 2016-03-09 Telefonaktiebolaget LM Ericsson (publ) Procédé et dispositif dans un système de communication sans fil
WO2011151662A1 (fr) * 2010-06-02 2011-12-08 Nokia Corporation Procédé et appareil de limitation des émissions dans les canaux adjacents en fonction d'une synchronisation de récepteur brouillé
US20120309415A1 (en) * 2010-07-21 2012-12-06 Zulutime, Llc Multipath compensation within geolocation of mobile devices
US8717920B2 (en) * 2010-10-08 2014-05-06 Telefonaktiebolaget L M Ericsson (Publ) Signalling mechanism for multi-tiered intra-band carrier aggregation
CN105450277B (zh) 2010-12-10 2018-11-20 太阳专利托管公司 发送方法和发送***以及接收方法和接收装置
CN102647781A (zh) * 2011-02-17 2012-08-22 中兴通讯股份有限公司 Lte的时间提前调整方法及基站
US9438387B2 (en) * 2011-07-27 2016-09-06 Lg Electronics Inc. Method and apparatus for transmitting synchronization signal in wireless communication system
CN102307385B (zh) * 2011-08-19 2014-09-10 电信科学技术研究院 一种多载波***中的定位方法、装置及***
KR102092579B1 (ko) 2011-08-22 2020-03-24 삼성전자 주식회사 이동통신 시스템에서 복수 개의 주파수 밴드 지원 방법 및 장치
CN103037406A (zh) * 2011-09-29 2013-04-10 华为技术有限公司 同步时间差获取方法、装置和***
JP6031088B2 (ja) * 2012-03-19 2016-11-24 京セラ株式会社 移動通信システム、無線基地局及び移動通信方法
US9282471B2 (en) 2012-03-21 2016-03-08 Digimarc Corporation Positioning systems for wireless networks
US9258106B2 (en) * 2012-07-27 2016-02-09 Nec Corporation Communication apparatus, time synchronization system, and time synchronization method
CN104010322B (zh) * 2013-02-27 2018-05-04 华为技术有限公司 基站间干扰的检测方法、装置及通信***
US9485678B2 (en) 2013-03-11 2016-11-01 Qualcomm Incorporated Effective utilization of cyclic prefix in OFDM systems under benign channel conditions
CN104349449A (zh) * 2013-07-24 2015-02-11 中兴通讯股份有限公司 一种全网基站的时钟偏差调整方法及装置
US10104661B2 (en) * 2014-01-22 2018-10-16 Empire Technology Development Llc Adaptively selecting from among multiple base stations
CN104202812A (zh) * 2014-08-14 2014-12-10 杭州绿宇通信技术有限公司 一种适用于精确定位***的高精度时间同步的方法
US9924481B2 (en) 2014-11-07 2018-03-20 Nokia Technologies Oy Indication of in/out of dual connectivity synchronized condition
US10433268B2 (en) 2015-02-02 2019-10-01 Telefonaktiebolaget Lm Ericsson (Publ) Calculating timing offset in wireless communications
EP3094141B1 (fr) * 2015-05-12 2020-12-16 Deutsche Telekom AG Procédé de synchronisation de réseau radio d'un réseau de communication mobile avec une fonctionnalité d'horloge locale fournissant une référence de synchronisation locale pour chaque entité de station de base, réseau de communication mobile, entité de station de base, programme et produit de programme informatique
US9668209B1 (en) * 2016-06-29 2017-05-30 Silicon Laboratories Finland Oy Listening window adjustments for power savings in bluetooth low energy (BLE) communications
US10945162B2 (en) * 2016-09-30 2021-03-09 Kyocera Corporation Special uplink subframe for enhanced mobility
CN106527111B (zh) * 2016-11-01 2018-12-11 国网山西省电力公司电力科学研究院 一种扩频编码gps信号同步***
US10939400B2 (en) * 2017-12-19 2021-03-02 Qualcomm Incorporated Time synchronization techniques for wireless communications
US11246107B2 (en) * 2018-11-02 2022-02-08 Qualcomm Incorporated Throughput modification for time delayed carriers
US11140651B2 (en) * 2018-12-31 2021-10-05 The Regents Of The University Of California Location determination of wireless communications devices
JP2022104765A (ja) * 2020-12-29 2022-07-11 財團法人工業技術研究院 信号センシングのためのシステムと方法

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69431287T2 (de) 1993-06-14 2003-05-15 Telefonaktiebolaget Lm Ericsson, Stockholm Übertragungszeitjustierung in der abwärtsverbindung eines systems mit kodemultiplex-vielfachzugriff
GB2301751B (en) * 1995-06-02 2000-02-09 Dsc Communications Control message transmission in telecommunications systems
US5940765A (en) * 1996-08-30 1999-08-17 Telefonaktiebolaget Lm Ericsson Radio communications systems and methods for jittered beacon transmission
JP2845228B2 (ja) * 1996-12-10 1999-01-13 日本電気株式会社 隣接セル同期検出方式
US5872774A (en) * 1997-09-19 1999-02-16 Qualcomm Incorporated Mobile station assisted timing synchronization in a CDMA communication system
FI106283B (fi) * 1998-01-21 2000-12-29 Nokia Mobile Phones Ltd Solukkoradiosynkronointi
US6111919A (en) 1999-01-20 2000-08-29 Intellon Corporation Synchronization of OFDM signals
US7039001B2 (en) 2002-10-29 2006-05-02 Qualcomm, Incorporated Channel estimation for OFDM communication systems
US7254196B2 (en) * 2002-11-26 2007-08-07 Agere Systems Inc. Symbol timing for MIMO OFDM and other wireless communication systems
JP4212403B2 (ja) * 2003-04-15 2009-01-21 株式会社東芝 放送信号の送信時刻測定装置及びその測定方法、この送信時刻測定装置を用いた送信装置及び中継装置、及び遅延時間測定装置
US7116632B2 (en) 2003-06-05 2006-10-03 Meshnetworks, Inc. System and method for determining synchronization point in OFDM modems for accurate time of flight measurement
KR100827105B1 (ko) * 2004-02-13 2008-05-02 삼성전자주식회사 광대역 무선 통신 시스템에서 고속 레인징을 통한 빠른핸드오버 수행 방법 및 장치
KR100810333B1 (ko) * 2004-06-15 2008-03-04 삼성전자주식회사 광대역 무선 접속 통신 시스템에서 소프트 핸드오버 지원을 위한 장치 및 방법
JP2006246440A (ja) 2005-02-03 2006-09-14 Toshiba Corp 無線通信端末及びハンドオーバ制御方法
US8165167B2 (en) * 2005-03-10 2012-04-24 Qualcomm Incorporated Time tracking for a communication system
US7656850B2 (en) 2005-10-11 2010-02-02 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for accelerated super 3G cell search

Also Published As

Publication number Publication date
CN103929392A (zh) 2014-07-16
CN101669341A (zh) 2010-03-10
US20100265968A1 (en) 2010-10-21
US8102754B2 (en) 2012-01-24
RU2463746C2 (ru) 2012-10-10
EP2140646A4 (fr) 2012-07-04
JP5309133B2 (ja) 2013-10-09
ES2478011T3 (es) 2014-07-18
EP2140646B1 (fr) 2014-02-12
WO2008133567A1 (fr) 2008-11-06
RU2009144135A (ru) 2011-06-10
EP2140646A1 (fr) 2010-01-06
JP2010526475A (ja) 2010-07-29
CN101669341B (zh) 2014-03-12

Similar Documents

Publication Publication Date Title
HK1199681A1 (en) Synchronization time difference measurements in ofdm systems ofdm
EP2332282A4 (fr) Systèmes de synchronisation de temps de réseau
EP2293629A4 (fr) Synchroniseur de temps
EP2368394A4 (fr) Indication de synchronisation dans des réseaux
GB0722256D0 (en) Level measurement system
GB0809107D0 (en) Scannign systems
EP2196131A4 (fr) Système d'introduction dans un sujet
IL200748A0 (en) Non-nucleoside reverse transcriptse inhibitors
EP2160129A4 (fr) Système de sondage à déplacement vers l'avant par rotation
EP2069956A4 (fr) Système de tv centrique
EP2115627A4 (fr) Procédés et systèmes de synchronisation
EP2255264A4 (fr) Synchronisation d'horloges dans un système distribué asynchrone
PL2170123T3 (pl) Układ wsporczy półek
GB201017109D0 (en) Digital-media systems
EP2198238A4 (fr) Système de rouleaux
IL186784A0 (en) Systems and methods for preparing drinks
GB0806351D0 (en) Visualisation system
DK200901203A (en) Hydroponisk system
GB2456929B (en) Synchronization
GB0816595D0 (en) Measuring system
TWI346784B (en) Automiatic jitter measurement method
EP2074825A4 (fr) Système centrique de télévision
IL188155A0 (en) Measurement system
GB0816072D0 (en) Ofdm reciever
GB2450135B (en) Cabinet system