ES2144987T1 - Sistema de sincronizacion de codigos ortogonales y metodo para ampliar el espectro de comunicaciones cdma. - Google Patents

Sistema de sincronizacion de codigos ortogonales y metodo para ampliar el espectro de comunicaciones cdma.

Info

Publication number
ES2144987T1
ES2144987T1 ES98915123T ES98915123T ES2144987T1 ES 2144987 T1 ES2144987 T1 ES 2144987T1 ES 98915123 T ES98915123 T ES 98915123T ES 98915123 T ES98915123 T ES 98915123T ES 2144987 T1 ES2144987 T1 ES 2144987T1
Authority
ES
Spain
Prior art keywords
synchronization
expand
base station
synchronization system
cdma communication
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.)
Granted
Application number
ES98915123T
Other languages
English (en)
Other versions
ES2144987T3 (es
Inventor
Gil Lavean
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.)
InterDigital Technology Corp
Original Assignee
InterDigital Technology Corp
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 InterDigital Technology Corp filed Critical InterDigital Technology Corp
Publication of ES2144987T1 publication Critical patent/ES2144987T1/es
Application granted granted Critical
Publication of ES2144987T3 publication Critical patent/ES2144987T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/004—Orthogonal
    • H04J13/0048—Walsh
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7073—Synchronisation aspects
    • H04B1/7085—Synchronisation aspects using a code tracking loop, e.g. a delay-locked loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0635—Clock or time synchronisation in a network
    • H04J3/0682—Clock or time synchronisation in a network by delay compensation, e.g. by compensation of propagation delay or variations thereof, by ranging
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70701—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation featuring pilot assisted reception
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/7097—Direct sequence modulation interference
    • H04B2201/709709—Methods of preventing interference

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Radio Relay Systems (AREA)
  • Communication Control (AREA)

Abstract

Un sistema radio celular en el que un receptor de estación base puede recibir, en el enlace inverso, los datos de un terminal móvil en cuatro modos. En el primer modo, el terminal móvil envía un piloto de usuario independiente sobre el enlace inverso y el canal de datos de usuario se sincroniza a este piloto de usuario independiente. En el segundo modo, el terminal móvil somete su piloto de usuario al piloto de la estación base recibida y el canal de datos de usuario se sincroniza con el piloto de usuario. En el tercer modo, el terminal móvil somete su piloto de usuario al piloto de la estación base recibido, pero el canal de datos de usuario opera en modo ortogonal usando la información de recorrido recibida de la estación base. La relación de fase entre el canal de piloto de usuario y el canal de datos de usuario se calibra. La portadora de piloto de usuario también es la portadora para el canal de datos del usuario y puede usarse como la referencia de portadora para detectar el canal dedatos de usuario. En el cuarto modo, se usa la implementación de piloto sometido del modo tres para la adquisición pero, después de la adquisición, el código de piloto de usuario se desplaza en fase para ser síncrono con el canal de datos del usuario, haciéndolo un canal ortogonal.
ES98915123T 1997-02-28 1998-02-26 Sistema de sincronizacion para codigo ortogonal y metodo de comunicacion cdma de espectro extendido. Expired - Lifetime ES2144987T3 (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US807228 1997-02-28
US08/807,228 US5943331A (en) 1997-02-28 1997-02-28 Orthogonal code synchronization system and method for spread spectrum CDMA communications

Publications (2)

Publication Number Publication Date
ES2144987T1 true ES2144987T1 (es) 2000-07-01
ES2144987T3 ES2144987T3 (es) 2004-11-01

Family

ID=25195867

Family Applications (2)

Application Number Title Priority Date Filing Date
ES98915123T Expired - Lifetime ES2144987T3 (es) 1997-02-28 1998-02-26 Sistema de sincronizacion para codigo ortogonal y metodo de comunicacion cdma de espectro extendido.
ES03028472T Expired - Lifetime ES2312716T3 (es) 1997-02-28 1998-02-26 Sistema y metodo de sincronizacion de codigos ortogonales para comunicaciones cdma de espectro expandido.

Family Applications After (1)

Application Number Title Priority Date Filing Date
ES03028472T Expired - Lifetime ES2312716T3 (es) 1997-02-28 1998-02-26 Sistema y metodo de sincronizacion de codigos ortogonales para comunicaciones cdma de espectro expandido.

Country Status (10)

Country Link
US (2) US5943331A (es)
EP (3) EP0978168B1 (es)
JP (1) JP3697268B2 (es)
CN (5) CN1878043A (es)
AT (2) ATE405033T1 (es)
DE (3) DE69839895D1 (es)
DK (3) DK0978168T3 (es)
ES (2) ES2144987T3 (es)
HK (5) HK1025694A1 (es)
WO (1) WO1998038758A2 (es)

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Also Published As

Publication number Publication date
US6141332A (en) 2000-10-31
EP0978168B1 (en) 2004-04-28
US5943331A (en) 1999-08-24
CN1878042A (zh) 2006-12-13
EP0978168A2 (en) 2000-02-09
JP3697268B2 (ja) 2005-09-21
WO1998038758A3 (en) 1998-11-26
EP1622284A3 (en) 2008-01-23
CN1249086A (zh) 2000-03-29
JP2001504311A (ja) 2001-03-27
DE978168T1 (de) 2000-11-09
DE69839895D1 (de) 2008-09-25
HK1025694A1 (en) 2000-11-17
DE69823496T2 (de) 2005-04-07
DK0978168T3 (da) 2004-08-16
EP1434361A2 (en) 2004-06-30
EP1434361B1 (en) 2008-08-13
ATE405033T1 (de) 2008-08-15
ES2312716T3 (es) 2009-03-01
DK1434361T3 (da) 2008-11-03
CN1702990A (zh) 2005-11-30
CN1881857B (zh) 2014-04-02
WO1998038758A2 (en) 1998-09-03
EP1622284B1 (en) 2012-07-18
EP1434361A3 (en) 2005-04-06
HK1098603A1 (en) 2007-07-20
HK1099144A1 (en) 2007-08-03
ES2144987T3 (es) 2004-11-01
CN1211941C (zh) 2005-07-20
DK1622284T3 (da) 2012-10-15
ATE265762T1 (de) 2004-05-15
EP1622284A2 (en) 2006-02-01
DE69823496D1 (de) 2004-06-03
HK1067002A1 (en) 2005-03-18
CN1878042B (zh) 2013-06-19
CN1878043A (zh) 2006-12-13
HK1086121A1 (en) 2006-09-08
CN1881857A (zh) 2006-12-20

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