BR9910412A - Receptor para uso em uma estação de comunicação de um sistema de cdma, e, processo de recebimento de pelo menos um de uma pluralidade de canais através de uma interface de ar de cdma - Google Patents

Receptor para uso em uma estação de comunicação de um sistema de cdma, e, processo de recebimento de pelo menos um de uma pluralidade de canais através de uma interface de ar de cdma

Info

Publication number
BR9910412A
BR9910412A BR9910412-1A BR9910412A BR9910412A BR 9910412 A BR9910412 A BR 9910412A BR 9910412 A BR9910412 A BR 9910412A BR 9910412 A BR9910412 A BR 9910412A
Authority
BR
Brazil
Prior art keywords
pilot
cdma
signal
receiver
air interface
Prior art date
Application number
BR9910412-1A
Other languages
English (en)
Inventor
Fatih M Ozluturk
David K Mesecher
Alexander M Jacques
Original Assignee
Interdigital Tech 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 Tech Corp filed Critical Interdigital Tech Corp
Publication of BR9910412A publication Critical patent/BR9910412A/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
    • H04B1/7085—Synchronisation aspects using a code tracking loop, e.g. a delay-locked loop
    • 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
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/30—Circuits for homodyne or synchrodyne receivers
    • 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
    • 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
    • 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
    • H04B1/709—Correlator structure
    • H04B1/7093—Matched filter type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • 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
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0063—Elements of loops
    • H04L2027/0067—Phase error detectors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0212—Channel estimation of impulse response
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Stereo-Broadcasting Methods (AREA)
  • Circuits Of Receivers In General (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Radio Relay Systems (AREA)

Abstract

"RECEPTOR PARA USO EM UMA ESTAçãO DE COMUNICAçãO DE UM SISTEMA DE CDMA, E, PROCESSO DE RECEBIMENTO DE PELO MENOS UM DE UMA PLURALIDADE DE CANAIS ATRAVéS DE UMA INTERFACE DE AR DE CDMA" Sistema de comunicação de espectro de espalhamento digital empregando demodulação de multicaminhos coerente auxiliada por piloto efetua uma redução substancial nos overheads de piloto global e de piloto atribuído. O sistema e processo usa um sinal de dados modulados de QPSK de descarregamento pelo que os dados modulados são removidos e a portadora recuperada é usada para estimativa de fase e de amplitude de canal. O sinal resultante (119) não tem modulação de dados e é usado como um sinal de pseudo piloto (119). Em conjunto com o sinal de pseudo piloto, o enlace de múltiplas entradas travado em fase (157) é empregado, eliminando, adicionalmente, erros devido ao deslocamento de portador por intermédio do uso de uma pluralidade de sinais de pseudo piloto. Um sinal de piloto (135) é requerido para resolver ambig³idade de fase absoluta, mas em uma magnitude grandemente reduzida.
BR9910412-1A 1998-05-14 1999-01-27 Receptor para uso em uma estação de comunicação de um sistema de cdma, e, processo de recebimento de pelo menos um de uma pluralidade de canais através de uma interface de ar de cdma BR9910412A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/078,417 US6366607B1 (en) 1998-05-14 1998-05-14 Processing for improved performance and reduced pilot
PCT/US1999/001794 WO1999059259A1 (en) 1998-05-14 1999-01-27 Multipath cdma receiver for reduced pilot

Publications (1)

Publication Number Publication Date
BR9910412A true BR9910412A (pt) 2001-01-09

Family

ID=22143895

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9910412-1A BR9910412A (pt) 1998-05-14 1999-01-27 Receptor para uso em uma estação de comunicação de um sistema de cdma, e, processo de recebimento de pelo menos um de uma pluralidade de canais através de uma interface de ar de cdma

Country Status (16)

Country Link
US (10) US6366607B1 (pt)
EP (3) EP1429469A3 (pt)
JP (2) JP4004229B2 (pt)
KR (1) KR100629701B1 (pt)
CN (3) CN100530995C (pt)
AT (2) ATE262240T1 (pt)
AU (1) AU2477699A (pt)
BR (1) BR9910412A (pt)
CA (1) CA2330703A1 (pt)
DE (2) DE69904039T2 (pt)
ES (2) ES2218498T3 (pt)
HK (1) HK1035814A1 (pt)
IL (1) IL139057A (pt)
SG (1) SG111970A1 (pt)
TR (1) TR200003340T2 (pt)
WO (1) WO1999059259A1 (pt)

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Also Published As

Publication number Publication date
US6516022B2 (en) 2003-02-04
SG111970A1 (en) 2005-06-29
DE69904039T2 (de) 2003-09-11
US6480530B2 (en) 2002-11-12
US7949037B2 (en) 2011-05-24
IL139057A (en) 2005-12-18
US20020039382A1 (en) 2002-04-04
CN1213547C (zh) 2005-08-03
IL139057A0 (en) 2001-11-25
EP1283602B1 (en) 2004-03-17
EP1429469A2 (en) 2004-06-16
US7110443B2 (en) 2006-09-19
US6483868B2 (en) 2002-11-19
ES2218498T3 (es) 2004-11-16
US8582625B2 (en) 2013-11-12
KR100629701B1 (ko) 2006-09-29
CN100530995C (zh) 2009-08-19
EP1429469A3 (en) 2004-06-30
ATE228278T1 (de) 2002-12-15
US6707845B2 (en) 2004-03-16
HK1035814A1 (en) 2001-12-07
US20040156424A1 (en) 2004-08-12
WO1999059259A1 (en) 1999-11-18
US20030156629A1 (en) 2003-08-21
DE69915714T2 (de) 2005-02-10
US20110188546A1 (en) 2011-08-04
ES2189387T3 (es) 2003-07-01
JP4004229B2 (ja) 2007-11-07
CA2330703A1 (en) 1999-11-18
JP2008011542A (ja) 2008-01-17
DE69915714D1 (de) 2004-04-22
CN1917385A (zh) 2007-02-21
US20020067760A1 (en) 2002-06-06
EP1076938A1 (en) 2001-02-21
US6944209B2 (en) 2005-09-13
CN1300476A (zh) 2001-06-20
TR200003340T2 (tr) 2001-02-21
CN1501614A (zh) 2004-06-02
ATE262240T1 (de) 2004-04-15
US6366607B1 (en) 2002-04-02
US20050254557A1 (en) 2005-11-17
EP1076938B1 (en) 2002-11-20
US8254431B2 (en) 2012-08-28
US20070014338A1 (en) 2007-01-18
EP1283602A2 (en) 2003-02-12
DE69904039D1 (de) 2003-01-02
US20020097787A1 (en) 2002-07-25
EP1283602A3 (en) 2003-02-19
AU2477699A (en) 1999-11-29
US20120320952A1 (en) 2012-12-20
KR20010043543A (ko) 2001-05-25
JP4566222B2 (ja) 2010-10-20
JP2002515679A (ja) 2002-05-28

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