BR9813026A - Espalhamento de código pn em múltiplas camadas em um sistema de comunicações de múltiplos usuários - Google Patents

Espalhamento de código pn em múltiplas camadas em um sistema de comunicações de múltiplos usuários

Info

Publication number
BR9813026A
BR9813026A BR9813026-9A BR9813026A BR9813026A BR 9813026 A BR9813026 A BR 9813026A BR 9813026 A BR9813026 A BR 9813026A BR 9813026 A BR9813026 A BR 9813026A
Authority
BR
Brazil
Prior art keywords
code
spreading
period
information signals
communications system
Prior art date
Application number
BR9813026-9A
Other languages
English (en)
Inventor
Brian Harms
Brian Butler
Gordon Skinner
Original Assignee
Qualcomm 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 Qualcomm Inc filed Critical Qualcomm Inc
Publication of BR9813026A publication Critical patent/BR9813026A/pt

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
    • H04B1/7077—Multi-step acquisition, e.g. multi-dwell, coarse-fine or validation
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/58—Random or pseudo-random number generators
    • G06F7/582—Pseudo-random number generators
    • G06F7/584—Pseudo-random number generators using finite field arithmetic, e.g. using a linear feedback shift register
    • 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
    • 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
    • H04B7/204—Multiple access
    • H04B7/216—Code division or spread-spectrum multiple access [CDMA, SSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/0022—PN, e.g. Kronecker
    • 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
    • H04B1/70755—Setting of lock conditions, e.g. threshold
    • 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
    • H04B2201/70716—Quadrature

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Analysis (AREA)
  • General Engineering & Computer Science (AREA)
  • Computational Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Relay Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Communication Control (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

Abstract

Patente de Invenção: ESPALHAMENTO DE CóDIGO PN EM MúLTIPLAS CAMADAS EM UM SISTEMA DE COMUNICAçõES DE MúLTIPLOS USUáRIOS. é descrita uma técnica para o espalhamento de sinais de informações em um sistema de comunicação de espectro espalhado para prover maior velocidade de aquisição ou captação do sinal. Um primeiro código de espalhamento PN ou conjunto de código é usado para espalhar os sinais de informações juntamente com uma segunda seq³ência ou função de código de espalhamento PN. O segundo código PN é sincronizado com o primeiro código de espalhamento PN, porém possui um período de código maior de forma a que cada chip de código do segundo código PN se estende por sobre todo o período do primeiro código PN. O código de espalhamento de período mais longo forma um código externo que auxilia ao provimento de uma identificação não ambígua do facho e uma fácil temporização ou timing na presença de retardo dinamicamente mutável na trajetória do sinal, melhorando a aquisição do sinal.
BR9813026-9A 1997-10-10 1998-10-09 Espalhamento de código pn em múltiplas camadas em um sistema de comunicações de múltiplos usuários BR9813026A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US6169897P 1997-10-10 1997-10-10
PCT/US1998/021466 WO1999019992A1 (en) 1997-10-10 1998-10-09 Multi-layered pn code spreading in a multi-user communications system

Publications (1)

Publication Number Publication Date
BR9813026A true BR9813026A (pt) 2000-08-15

Family

ID=22037524

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9813026-9A BR9813026A (pt) 1997-10-10 1998-10-09 Espalhamento de código pn em múltiplas camadas em um sistema de comunicações de múltiplos usuários

Country Status (13)

Country Link
US (1) US6493376B1 (pt)
EP (1) EP1029398B1 (pt)
JP (1) JP4386574B2 (pt)
KR (1) KR100693682B1 (pt)
CN (2) CN100590988C (pt)
AT (1) ATE450084T1 (pt)
AU (1) AU754257B2 (pt)
BR (1) BR9813026A (pt)
CA (1) CA2305718C (pt)
DE (1) DE69841326D1 (pt)
NO (1) NO318825B1 (pt)
RU (1) RU2221337C2 (pt)
WO (1) WO1999019992A1 (pt)

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Also Published As

Publication number Publication date
KR20010031050A (ko) 2001-04-16
EP1029398B1 (en) 2009-11-25
CN1819473A (zh) 2006-08-16
NO20001819D0 (no) 2000-04-07
CN1281599A (zh) 2001-01-24
DE69841326D1 (de) 2010-01-07
CN100590988C (zh) 2010-02-17
ATE450084T1 (de) 2009-12-15
NO318825B1 (no) 2005-05-09
NO20001819L (no) 2000-06-08
CA2305718A1 (en) 1999-04-22
RU2221337C2 (ru) 2004-01-10
JP4386574B2 (ja) 2009-12-16
US6493376B1 (en) 2002-12-10
AU1270299A (en) 1999-05-03
CN100459444C (zh) 2009-02-04
KR100693682B1 (ko) 2007-03-09
CA2305718C (en) 2010-12-07
EP1029398A1 (en) 2000-08-23
WO1999019992A1 (en) 1999-04-22
AU754257B2 (en) 2002-11-07
JP2001520473A (ja) 2001-10-30

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