CA2208697A1 - Amelioration de la synchronisation simultanee a l'aide d'un gps - Google Patents

Amelioration de la synchronisation simultanee a l'aide d'un gps

Info

Publication number
CA2208697A1
CA2208697A1 CA 2208697 CA2208697A CA2208697A1 CA 2208697 A1 CA2208697 A1 CA 2208697A1 CA 2208697 CA2208697 CA 2208697 CA 2208697 A CA2208697 A CA 2208697A CA 2208697 A1 CA2208697 A1 CA 2208697A1
Authority
CA
Canada
Prior art keywords
data
site
signal
high speed
resynch
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
CA 2208697
Other languages
English (en)
Inventor
Thomas A. Brown
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ericsson Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2208697A1 publication Critical patent/CA2208697A1/fr
Abandoned legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65—Arrangements characterised by transmission systems for broadcast
    • H04H20/67—Common-wave systems, i.e. using separate transmitters operating on substantially the same frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Relay Systems (AREA)

Abstract

Dans un système d'émissions simultané RF à sites multiples, les données transmises par des liaisons de communication intersite (L1, L2, etc.) par un point de contrôle à l'émetteur RF ont des fluctuations temporelles aléatoires parce que les modems multiphase recouvrent les signaux d'horloge à partir de l'une quelconque des multiples phases. Les chaînes de données de sortie des modems sont stockées temporairement aux sites dans des mémoires tampons en vue d'un alignement temporel assurant la simultanéité des émissions. A chacun des sites, les mémoires tampons seront resynchronisées de façon continue par un circuit de resynchronisation universel afin d'optimiser la performance du système d'émission simultanée. Un signal de référence d'horloge de 9 600 bps et un signal de déclenchement basse fréquence nécessaires pour effectuer la resynchronisation périodique sont obtenus séparément d'un signal de référence commun capté par un récepteur GPS (« Global Positioning System ») installé à chaque site du système d'émission simultanée. La resynchronisation est effectuée de façon continue par chaque site du système et la chaîne de données de diffusion multisite est alignée à l'aide des tonalités de référence de resynchronisation extraites du signal GPS capté.
CA 2208697 1994-12-27 1995-12-22 Amelioration de la synchronisation simultanee a l'aide d'un gps Abandoned CA2208697A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US36446794A 1994-12-27 1994-12-27
US364,467 1994-12-27

Publications (1)

Publication Number Publication Date
CA2208697A1 true CA2208697A1 (fr) 1996-07-04

Family

ID=23434646

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2208697 Abandoned CA2208697A1 (fr) 1994-12-27 1995-12-22 Amelioration de la synchronisation simultanee a l'aide d'un gps

Country Status (5)

Country Link
CN (1) CN1175333A (fr)
AU (1) AU4607996A (fr)
CA (1) CA2208697A1 (fr)
SE (1) SE9702434L (fr)
WO (1) WO1996020543A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19633786A1 (de) * 1996-08-22 1998-02-26 Bosch Gmbh Robert Verfahren zur Synchronisation von Funkzellen im Gleichwellenfunk und Funkstation
GB2388264A (en) * 2002-01-10 2003-11-05 Roke Manor Research GPS based networked time synchronised unit
US6836506B2 (en) * 2002-08-27 2004-12-28 Qualcomm Incorporated Synchronizing timing between multiple air link standard signals operating within a communications terminal
DE10354468A1 (de) * 2003-11-21 2005-06-23 Rohde & Schwarz Gmbh & Co. Kg Verfahren und Vorrichtung zur Überwachung der Trägerfrequenzstabilität von Sendern in einem Gleichwellennetz
CN101179371B (zh) * 2006-11-09 2010-04-07 大唐移动通信设备有限公司 提取全球定位系统同步时钟的时钟锁相方法及时钟锁相环
US8279908B2 (en) * 2008-12-31 2012-10-02 Ibiquity Digital Corporation Synchronization of separated platforms in an HD radio broadcast single frequency network
CN102004622B (zh) * 2010-11-17 2012-07-18 广东威创视讯科技股份有限公司 一种多处理器显示系统及其方法
CN102316576B (zh) * 2011-09-21 2018-04-17 中兴通讯股份有限公司 一种无线基站时钟同步方法、系统、基带框和交换框
US9585121B2 (en) 2012-01-05 2017-02-28 Motorola Solutions, Inc. Method and apparatus for simulcasting within a communication system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU1342892A (en) * 1991-01-28 1992-08-27 Motorola, Inc. Simulcast transmission system having predetermined launch times
GB9111313D0 (en) * 1991-05-24 1991-07-17 British Telecomm Radio system
US5261118A (en) * 1991-10-04 1993-11-09 Motorola, Inc. Simulcast synchronization and equalization system and method therefor
SG46571A1 (en) * 1992-01-10 1998-02-20 Nec Corp Radio paging systems having a plurality of transmitter stations
US5243299A (en) * 1992-01-22 1993-09-07 Glenayre Electronics, Inc. Variable speed asynchronous modem
US5517680A (en) * 1992-01-22 1996-05-14 Ericsson Inc. Self correction of PST simulcast system timing

Also Published As

Publication number Publication date
SE9702434L (sv) 1997-08-08
MX9704630A (es) 1997-09-30
AU4607996A (en) 1996-07-19
CN1175333A (zh) 1998-03-04
WO1996020543A1 (fr) 1996-07-04
SE9702434D0 (sv) 1997-06-25

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Legal Events

Date Code Title Description
FZDE Dead