BR0213089A - Método e equipamento para adquirir pilotos através de espaço de código e erros de frequência em um sistema de comunicação cdma - Google Patents

Método e equipamento para adquirir pilotos através de espaço de código e erros de frequência em um sistema de comunicação cdma

Info

Publication number
BR0213089A
BR0213089A BR0213089-0A BR0213089A BR0213089A BR 0213089 A BR0213089 A BR 0213089A BR 0213089 A BR0213089 A BR 0213089A BR 0213089 A BR0213089 A BR 0213089A
Authority
BR
Brazil
Prior art keywords
pilots
peaks
frequency
code space
communication system
Prior art date
Application number
BR0213089-0A
Other languages
English (en)
Inventor
Raghu Challa
Gilbert Christopher Sih
Serguei A Glazko
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 BR0213089A publication Critical patent/BR0213089A/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
    • H04B1/708—Parallel implementation
    • 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
    • H04B1/7087—Carrier synchronisation aspects
    • 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
    • H04B1/70751—Synchronisation aspects with code phase acquisition using partial detection
    • H04B1/70753—Partial phase search
    • 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
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H04B1/7117—Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers
    • 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
    • H04B2201/70707—Efficiency-related aspects

Landscapes

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

Abstract

"MéTODO E EQUIPAMENTO PARA CAPTAR PILOTOS ATRAVéS DE ERROS DE ESPAçO DE CóDIGO E FREQuêNCIA EM UM SISTEMA DE COMUNICAçãO CDMA". Técnicas para captar pilotos através de erros de espaço de código e/ou freq³ência. Em um aspecto, a captação de pilotos é efetuada utilizando-se um certo número de subestágios e alguns dos subestágios são seq³enciados simultaneamente (pipelined) e efetuados em paralelo utilizando-se diferentes elementos de processamento. Um buscador inicialmente busca dentro de um espaço de código designado para encontrar picos e tais picos podem ser reavaliados. Processadores de ramos (fingers) a seguir tentam captar os picos candidatos. O buscador pode ser operado para procurar pelo próximo conjunto de picos enquanto os processadores de ramos processam o corrente conjunto de picos. Em outro aspecto, a faixa completa de erros de freq³ência para os pilotos é dividida entre um certo número de intervalos de freq³ência (frequency bins). Um esquema de múltiplos estágios é usado para avaliar os intervalos, podendo empregar processamento seq³enciado simultaneamente e paralelo de tal forma que seja efetuada uma busca por picos no próximo intervalo enquanto é tentada a captação de picos encontrados para o corrente intervalo.
BR0213089-0A 2001-10-04 2002-10-02 Método e equipamento para adquirir pilotos através de espaço de código e erros de frequência em um sistema de comunicação cdma BR0213089A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/971,903 US7020180B2 (en) 2001-10-04 2001-10-04 Method and apparatus for acquiring pilots over code space and frequency errors in a CDMA communication system
PCT/US2002/031776 WO2003030391A2 (en) 2001-10-04 2002-10-02 Method and apparatus for acquiring pilots over code space and frequency errors in a cdma communication system

Publications (1)

Publication Number Publication Date
BR0213089A true BR0213089A (pt) 2004-12-28

Family

ID=25518943

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0213089-0A BR0213089A (pt) 2001-10-04 2002-10-02 Método e equipamento para adquirir pilotos através de espaço de código e erros de frequência em um sistema de comunicação cdma

Country Status (5)

Country Link
US (1) US7020180B2 (pt)
KR (1) KR100997620B1 (pt)
BR (1) BR0213089A (pt)
IL (2) IL161260A0 (pt)
WO (1) WO2003030391A2 (pt)

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US7990929B2 (en) * 2007-11-27 2011-08-02 Harris Corporation Wireless communications device including rake finger stage providing frequency correction and related methods
US20090135799A1 (en) * 2007-11-27 2009-05-28 Harris Corporation Wireless communications device including path searcher with common coherent correlator and related methods
US8467365B1 (en) 2008-01-24 2013-06-18 Sprint Spectrum L.P. Method and system for defining search windows based on mobile station location
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US20090239550A1 (en) * 2008-03-18 2009-09-24 Myers Theodore J Random phase multiple access system with location tracking
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US7526013B1 (en) * 2008-03-18 2009-04-28 On-Ramp Wireless, Inc. Tag communications with access point
US8958460B2 (en) * 2008-03-18 2015-02-17 On-Ramp Wireless, Inc. Forward error correction media access control system
US7733945B2 (en) * 2008-03-18 2010-06-08 On-Ramp Wireless, Inc. Spread spectrum with doppler optimization
US8477830B2 (en) 2008-03-18 2013-07-02 On-Ramp Wireless, Inc. Light monitoring system using a random phase multiple access system
US20100195553A1 (en) * 2008-03-18 2010-08-05 Myers Theodore J Controlling power in a spread spectrum system
US8363699B2 (en) 2009-03-20 2013-01-29 On-Ramp Wireless, Inc. Random timing offset determination
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US11909405B1 (en) * 2023-01-09 2024-02-20 Infineon Technologies Ag Digital coarse locking in digital phase-locked loops

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Also Published As

Publication number Publication date
US7020180B2 (en) 2006-03-28
IL161260A0 (en) 2004-09-27
IL161260A (en) 2010-11-30
WO2003030391A3 (en) 2003-08-28
US20030067898A1 (en) 2003-04-10
KR20040037249A (ko) 2004-05-04
WO2003030391A2 (en) 2003-04-10
KR100997620B1 (ko) 2010-12-01

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Free format text: EM VIRTUDE DO ARQUIVAMENTO PUBLICADO NA RPI 2602 DE 17-11-2020 E CONSIDERANDO AUSENCIA DE MANIFESTACAO DENTRO DOS PRAZOS LEGAIS, INFORMO QUE CABE SER MANTIDO O ARQUIVAMENTO DO PEDIDO DE PATENTE, CONFORME O DISPOSTO NO ARTIGO 12, DA RESOLUCAO 113/2013.