BR9815686A - Sistema combinador de retardo para repetidores cdma e amplificadores de baixo ruìdo - Google Patents

Sistema combinador de retardo para repetidores cdma e amplificadores de baixo ruìdo

Info

Publication number
BR9815686A
BR9815686A BR9815686-1A BR9815686A BR9815686A BR 9815686 A BR9815686 A BR 9815686A BR 9815686 A BR9815686 A BR 9815686A BR 9815686 A BR9815686 A BR 9815686A
Authority
BR
Brazil
Prior art keywords
signal
cdma
low
base station
repeater
Prior art date
Application number
BR9815686-1A
Other languages
English (en)
Inventor
Matthew P Fuerter
Original Assignee
Repeater Technologies
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 Repeater Technologies filed Critical Repeater Technologies
Publication of BR9815686A publication Critical patent/BR9815686A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0891—Space-time diversity
    • H04B7/0894—Space-time diversity using different delays between antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/10—Polarisation diversity; Directional diversity
    • 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
    • H04B7/155—Ground-based stations

Landscapes

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

Abstract

Patente de Invenção: <B>"SISTEMA COMBINADOR DE RETARDO PARA REPETIDORES CDMA E AMPLIFICADORES DE BAIXO RUìDO"<D>. Técnicas de retardo e combinação são utilizadas com sinais de trajetos múltiplos para fornecer ganho de diversidade de sinal dentro de repetidor CDMA pelo ar e sistemas de amplificador de baixo ruído. Um sinal de entrada a partir de um usuário remoto é tipicamente processado através de dois trajetos de processamento, nos quais um trajeto adiciona um retardo ao sinal processado. Os dois trajetos de sinal são então combinados e filtrados através de um filtro de faixa de passagem estreito, preferivelmente um filtro SAW. Em um repetidor pelo ar, o sinal filtrado é retransmitido no sentido de um receptor em pente CDMA em uma estação base que pode processar o sinal de trajetos múltiplos para produzir uma representação de sinal limpo. Em um amplificador de baixo ruído o sinal filtrado é transferido diretamente para uma estação base ou repetidor. A utilização de filtros SAW protege os últimos estágios do amplificador de baixo ruído e também protege a estação base de interferência de sinal fora de faixa. Um sistema de amplificação de baixo ruído de diversidade quádrupla para configuração de estações base é também divulgado, o qual fornece diversidade quádrupla e sensitividade aperfeiçoada para estações base CDMA.
BR9815686-1A 1998-02-24 1998-12-30 Sistema combinador de retardo para repetidores cdma e amplificadores de baixo ruìdo BR9815686A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/028,434 US6125109A (en) 1998-02-24 1998-02-24 Delay combiner system for CDMA repeaters and low noise amplifiers
PCT/US1998/027881 WO1999044308A1 (en) 1998-02-24 1998-12-30 Delay combiner system for cdma repeaters and low noise amplifiers

Publications (1)

Publication Number Publication Date
BR9815686A true BR9815686A (pt) 2000-11-14

Family

ID=21843426

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9815686-1A BR9815686A (pt) 1998-02-24 1998-12-30 Sistema combinador de retardo para repetidores cdma e amplificadores de baixo ruìdo

Country Status (10)

Country Link
US (1) US6125109A (pt)
EP (1) EP1057285A1 (pt)
JP (1) JP2002505543A (pt)
KR (1) KR20010041311A (pt)
CN (1) CN1285095A (pt)
AU (1) AU745488B2 (pt)
BR (1) BR9815686A (pt)
CA (1) CA2330632A1 (pt)
IL (1) IL137405A0 (pt)
WO (1) WO1999044308A1 (pt)

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Also Published As

Publication number Publication date
CA2330632A1 (en) 1999-09-02
IL137405A0 (en) 2001-07-24
AU745488B2 (en) 2002-03-21
US6125109A (en) 2000-09-26
EP1057285A1 (en) 2000-12-06
JP2002505543A (ja) 2002-02-19
AU2210099A (en) 1999-09-15
CN1285095A (zh) 2001-02-21
KR20010041311A (ko) 2001-05-15
WO1999044308A1 (en) 1999-09-02

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