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BR9812816A - Processos para comunicação sem fio, e para eficientemente determinar na estação base um canal espacial da unidade móvel em um sistema de comunicação sem fio, e, estação base de cdma - Google Patents

Processos para comunicação sem fio, e para eficientemente determinar na estação base um canal espacial da unidade móvel em um sistema de comunicação sem fio, e, estação base de cdma

Info

Publication number
BR9812816A
BR9812816A BR9812816-7A BR9812816A BR9812816A BR 9812816 A BR9812816 A BR 9812816A BR 9812816 A BR9812816 A BR 9812816A BR 9812816 A BR9812816 A BR 9812816A
Authority
BR
Brazil
Prior art keywords
base station
wireless communication
cdma
link
mobile unit
Prior art date
Application number
BR9812816-7A
Other languages
English (en)
Inventor
Shimon B Scherzer
Original Assignee
Adaptive Telecom 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
Priority claimed from US08/929,638 external-priority patent/US6108565A/en
Application filed by Adaptive Telecom Inc filed Critical Adaptive Telecom Inc
Priority claimed from PCT/US1998/019299 external-priority patent/WO1999014870A2/en
Publication of BR9812816A publication Critical patent/BR9812816A/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
    • H04B7/0891—Space-time diversity
    • H04B7/0897—Space-time diversity using beamforming per multi-path, e.g. to cope with different directions of arrival [DOA] at different multi-paths
    • 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
    • H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
    • 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
    • H04B7/0491—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more sectors, i.e. sector diversity
    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal

Landscapes

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

Abstract

"PROCESSOS PARA COMUNICAçãO SEM FIO, E PARA EFICIENTEMENTE DETERMINAR NA ESTAçãO BASE UM CANAL ESPACIAL DA UNIDADE MóVEL EM UM SISTEMA DE COMUNICAçãO SEM FIO, E, ESTAçãO BASE DE CDMA". Um modo prático para intensificar qualidade de sinal (portadora para interferência C/I) em ambas ligação superior e ligação inferior de serviço CDMA de ponto a multiponto sem fio implementa direção de rádio básico encontrando técnicas para permitir combinação de diversidade ótima em um arranjo de antena empregando grande número de elementos. Esta abordagem é facilitada através do uso de aritmética de contagens de muito pequenos bits e capitalizando na estrutura de sinal de alfabeto finito (símbolos de Walsh, por exemplo, em CDMA IS-95) ou uma seq³ência de sucessão conhecida. Implementações alternativas podem usar representações de dados de ponto flutuante. O processo facilita implementação de ASIC, por esse meio permitindo processamento distribuído para obter a praticidade de computação requerida. O processo utiliza os dados de canal de ligação superior para determinar a estrutura espacial de ligação inferior (feixes de arranjo) para intensificar C/I de ligação inferior e portanto aumentar capacidade de ligação inferior. A concretização preferida é otimizada para IS-95, entretanto qualquer sinal que tenha tanto um alfabeto finito ou uma seq³ência de sucessão construída pode utilizar a mesma idéia. O uso de estrutura de sinal conhecida facilita determinação de vetor de resposta de arranjo simples e elimina a necessidade de cálculo e análise de matriz de covariância. Portanto, esta abordagem pode se utilizada para interfaces de ar sem fio GSM E TDMA igualmente.
BR9812816-7A 1997-09-15 1998-09-15 Processos para comunicação sem fio, e para eficientemente determinar na estação base um canal espacial da unidade móvel em um sistema de comunicação sem fio, e, estação base de cdma BR9812816A (pt)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US08/929,638 US6108565A (en) 1997-09-15 1997-09-15 Practical space-time radio method for CDMA communication capacity enhancement
US7147398P 1998-01-13 1998-01-13
US7797998P 1998-03-13 1998-03-13
US9315098P 1998-07-17 1998-07-17
PCT/US1998/019299 WO1999014870A2 (en) 1997-09-15 1998-09-15 Practical space-time radio method for cdma communication capacity enhancement

Publications (1)

Publication Number Publication Date
BR9812816A true BR9812816A (pt) 2000-08-08

Family

ID=27490905

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9812816-7A BR9812816A (pt) 1997-09-15 1998-09-15 Processos para comunicação sem fio, e para eficientemente determinar na estação base um canal espacial da unidade móvel em um sistema de comunicação sem fio, e, estação base de cdma

Country Status (2)

Country Link
US (1) US6347234B1 (pt)
BR (1) BR9812816A (pt)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112019280A (zh) * 2020-08-25 2020-12-01 安徽蓝煜电子科技有限公司 一种智能天线网络校准方法

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