MXPA02012796A - Offsets de sincronizacion de codigos cortos en un sistema cdma. - Google Patents

Offsets de sincronizacion de codigos cortos en un sistema cdma.

Info

Publication number
MXPA02012796A
MXPA02012796A MXPA02012796A MXPA02012796A MXPA02012796A MX PA02012796 A MXPA02012796 A MX PA02012796A MX PA02012796 A MXPA02012796 A MX PA02012796A MX PA02012796 A MXPA02012796 A MX PA02012796A MX PA02012796 A MXPA02012796 A MX PA02012796A
Authority
MX
Mexico
Prior art keywords
bts
candidate
aircraft
subscriber unit
subscriber
Prior art date
Application number
MXPA02012796A
Other languages
English (en)
Inventor
Michael B Haverty
Original Assignee
Motorola 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 Motorola Inc filed Critical Motorola Inc
Publication of MXPA02012796A publication Critical patent/MXPA02012796A/es

Links

Classifications

    • 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
    • H04B1/7075—Synchronisation aspects with code phase acquisition
    • H04B1/708—Parallel implementation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/18502—Airborne stations
    • H04B7/18506—Communications with or from aircraft, i.e. aeronautical mobile service
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Relay Systems (AREA)

Abstract

Una red de comunicaciones celulares CDMA (400, Fig. 4) incluye una o mas aeronaves (410) que retransmiten senales de canal piloto y de canal de control entre estaciones transceptoras base (BTS 406, 413) y unidades subscriptoras (4 01). A traves del canal de control, la BTS transmite una lista de candidatos de transmision a las unidades subscriptoras. La lista de candidatos de transmision identifica las BTS candidatas a las cuales la unidad subscriptora, teoricamente, podria transmit ir. Ademas, la lista indica en que offsets las unidades subscriptoras deberian buscar los codigos cortos transmitidos por las BTS candidatas a traves del canal piloto. En base a la longitud de trayectoria entre la BTS, la aeronave, y la unidad subscriptora, la BTS candidata genera sus codigos cortos en un offset que es igual o anterior, por algunos deltas, al offset informado a la unidad subscriptora. Asimismo, Las BTS pueden aplicar una demora variable a los bits de codigo corto generados, para compensar las variaciones en la demora de trayectoria a medida que la aeronave recorre su patron de vuelo.
MXPA02012796A 2000-06-26 2001-06-22 Offsets de sincronizacion de codigos cortos en un sistema cdma. MXPA02012796A (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/605,663 US6813257B1 (en) 2000-06-26 2000-06-26 Apparatus and methods for controlling short code timing offsets in a CDMA system
PCT/US2001/019974 WO2002001736A2 (en) 2000-06-26 2001-06-22 Short code timing offsets in a cdma system

Publications (1)

Publication Number Publication Date
MXPA02012796A true MXPA02012796A (es) 2004-07-30

Family

ID=24424656

Family Applications (1)

Application Number Title Priority Date Filing Date
MXPA02012796A MXPA02012796A (es) 2000-06-26 2001-06-22 Offsets de sincronizacion de codigos cortos en un sistema cdma.

Country Status (8)

Country Link
US (1) US6813257B1 (es)
EP (1) EP1297644A2 (es)
CN (1) CN1197272C (es)
AU (1) AU2001275839A1 (es)
BR (1) BR0112184A (es)
CA (1) CA2413032C (es)
MX (1) MXPA02012796A (es)
WO (1) WO2002001736A2 (es)

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Also Published As

Publication number Publication date
CA2413032C (en) 2011-08-09
BR0112184A (pt) 2003-05-20
WO2002001736A2 (en) 2002-01-03
WO2002001736A3 (en) 2002-04-18
AU2001275839A1 (en) 2002-01-08
US6813257B1 (en) 2004-11-02
EP1297644A2 (en) 2003-04-02
CN1439202A (zh) 2003-08-27
CA2413032A1 (en) 2002-01-03
CN1197272C (zh) 2005-04-13

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