AR020596A1 - Una estacion de radio para una disposicion de comunicaciones movil de codigo de dispersion de secuencia directa y un metodo para generar codigos de dispersion en una disposicion que utiliza dicha estacion de radio - Google Patents

Una estacion de radio para una disposicion de comunicaciones movil de codigo de dispersion de secuencia directa y un metodo para generar codigos de dispersion en una disposicion que utiliza dicha estacion de radio

Info

Publication number
AR020596A1
AR020596A1 ARP990102894A ARP990102894A AR020596A1 AR 020596 A1 AR020596 A1 AR 020596A1 AR P990102894 A ARP990102894 A AR P990102894A AR P990102894 A ARP990102894 A AR P990102894A AR 020596 A1 AR020596 A1 AR 020596A1
Authority
AR
Argentina
Prior art keywords
dispersion
code
codes
family
radio station
Prior art date
Application number
ARP990102894A
Other languages
English (en)
Original Assignee
Ericsson Telefon Ab L M
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 Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of AR020596A1 publication Critical patent/AR020596A1/es

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0074—Code shifting or hopping
    • 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
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2628—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/10—Code generation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/10—Code generation
    • H04J13/102—Combining codes
    • H04J13/105—Combining codes by extending
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/16—Code allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J2013/0037—Multilevel codes

Landscapes

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

Abstract

Las secuencias de codigo optimas son generadas para ser utilizadas en funciones de dispersion y agrupamiento en un sistema de comunicaciones de accesomultiple por division de codigo (CDMA). En particular, se utiliza una familia de codigos dedispersi on de fase cuádruple que provee un numero máximo de codigosde dispersion para obtener una alta capacidad en el sistema de comunicaciones CDMA teniendo al mismo tiempo un pico mínimo de correlacion cruzada entrecualesquiera dos codigos dedispersion e n esa familia para asegurar que la interferencia de correlacion cruzada se mantenga en o por debajo de los nivelesaceptables. Esta familia de codigo de dispersion de fase cuádruple es la familia S(2) de secuencias de codigo de cuatrofases de longitu d L = 2m-1, donde m esun entero mayor o igual que 5. El tamano de la familia S(2) de codigos de dispersion cuaternarios es (L + 2)(L + 1)2, y la correlacion cruzada máxima es1 + 4 (L + 1)1/2. Los codigos de dispersion sonpreferentemente asignados a estaciones base que utilizan subconjuntos específicos de codigo de la familia S(2)que tengan las mismas propiedades de correlacion cruzada que las familias de codigos S(0) y/o S(1). Los codigos de dispersion sonventajosamente extendidos poruno o más símbolos de codigo segun sea necesario o de otra manera deseable. Por ejemplo para sustentar servicios de velocidad de transmision variable, esdeseable emplear codigos de dispersion cuya longitud pueda serexpresada como un entero multiplo de cada f actor de dispersion en el sistema de comunicacionesmovil. Dado que los codigos de dispersion individuales tienen una longitud de 2m-1, un símbolo de codigo es anadido al codigo de dispersion generado.
ARP990102894A 1998-06-16 1999-06-16 Una estacion de radio para una disposicion de comunicaciones movil de codigo de dispersion de secuencia directa y un metodo para generar codigos de dispersion en una disposicion que utiliza dicha estacion de radio AR020596A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/097,916 US6393047B1 (en) 1998-06-16 1998-06-16 Quadriphase spreading codes in code division multiple access communications

Publications (1)

Publication Number Publication Date
AR020596A1 true AR020596A1 (es) 2002-05-22

Family

ID=22265751

Family Applications (1)

Application Number Title Priority Date Filing Date
ARP990102894A AR020596A1 (es) 1998-06-16 1999-06-16 Una estacion de radio para una disposicion de comunicaciones movil de codigo de dispersion de secuencia directa y un metodo para generar codigos de dispersion en una disposicion que utiliza dicha estacion de radio

Country Status (15)

Country Link
US (1) US6393047B1 (es)
EP (1) EP1088416B1 (es)
JP (1) JP4365030B2 (es)
KR (1) KR100689562B1 (es)
CN (1) CN100352186C (es)
AR (1) AR020596A1 (es)
AU (1) AU756686B2 (es)
BR (1) BRPI9911341B1 (es)
CA (1) CA2335018C (es)
DE (1) DE69933029T2 (es)
MY (1) MY126483A (es)
RU (1) RU2226035C2 (es)
TW (1) TW448644B (es)
WO (1) WO1999066645A2 (es)
ZA (1) ZA200007304B (es)

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Also Published As

Publication number Publication date
DE69933029D1 (de) 2006-10-12
ZA200007304B (en) 2001-10-11
KR20010071485A (ko) 2001-07-28
CA2335018A1 (en) 1999-12-23
WO1999066645A2 (en) 1999-12-23
EP1088416A2 (en) 2001-04-04
RU2226035C2 (ru) 2004-03-20
MY126483A (en) 2006-10-31
BRPI9911341B1 (pt) 2016-06-14
TW448644B (en) 2001-08-01
BR9911341A (pt) 2001-03-13
KR100689562B1 (ko) 2007-03-09
AU756686B2 (en) 2003-01-23
JP2002518928A (ja) 2002-06-25
WO1999066645A3 (en) 2000-04-27
CN1316142A (zh) 2001-10-03
DE69933029T2 (de) 2007-04-12
EP1088416B1 (en) 2006-08-30
CA2335018C (en) 2009-09-29
US6393047B1 (en) 2002-05-21
CN100352186C (zh) 2007-11-28
JP4365030B2 (ja) 2009-11-18
AU4812799A (en) 2000-01-05

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