[go: up one dir, main page]

BR9901054A - Sistema de telecomunicações sem fio que alivia o efeito de desvanecimento de múltiplas vias. - Google Patents

Sistema de telecomunicações sem fio que alivia o efeito de desvanecimento de múltiplas vias.

Info

Publication number
BR9901054A
BR9901054A BR9901054-2A BR9901054A BR9901054A BR 9901054 A BR9901054 A BR 9901054A BR 9901054 A BR9901054 A BR 9901054A BR 9901054 A BR9901054 A BR 9901054A
Authority
BR
Brazil
Prior art keywords
signal
telecommunications system
wireless telecommunications
alleviates
modulation
Prior art date
Application number
BR9901054-2A
Other languages
English (en)
Inventor
Nallepilli Subramanian Ramesh
Original Assignee
Lucent Technologies 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 Lucent Technologies Inc filed Critical Lucent Technologies Inc
Publication of BR9901054A publication Critical patent/BR9901054A/pt

Links

Classifications

    • 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
    • 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
    • H04B7/0667—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 delayed versions of same signal
    • H04B7/0671—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 delayed versions of same signal 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
    • H04B7/04—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

Landscapes

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

Abstract

<B>SISTEMA DE TELECOMUNICAçõES SEM FIO QUE ALIVIA O EFEITO DE DESVANECIMENTO DE MúLTIPLAS VIAS<D>. é revelado um sistema de telecomunicações sem fio que alivia desvanecimento de múltiplas vias através de um aperfeiçoamento em diversidade de transmissão. Adicionalmente, modalidades da presente invenção são bem adequadas para uso com todos os esquemas de multiplexação de canal de emissão (por exemplo, multiplexação por divisão de freq³ência, multiplexação por divisão de tempo, multiplexação por divisão de código, etc.) e todas as técnicas de modulação (por exemplo, modulação de amplitude, modulação de freq³ência, modulação de fase, etc.). Uma modalidade ilustrativa da presente invenção compreende: um inversor de sinal para inverter e alternadamente não inverter um primeiro sinal de acordo com uma programação para criar um segundo sinal; uma primeira antena para transmitir o primeiro sinal; e uma segunda antena para transmitir o segundo sinal.
BR9901054-2A 1998-04-21 1999-04-14 Sistema de telecomunicações sem fio que alivia o efeito de desvanecimento de múltiplas vias. BR9901054A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/063,690 US6205127B1 (en) 1998-04-21 1998-04-21 Wireless telecommunications system that mitigates the effect of multipath fading

Publications (1)

Publication Number Publication Date
BR9901054A true BR9901054A (pt) 2000-01-18

Family

ID=22050849

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9901054-2A BR9901054A (pt) 1998-04-21 1999-04-14 Sistema de telecomunicações sem fio que alivia o efeito de desvanecimento de múltiplas vias.

Country Status (8)

Country Link
US (1) US6205127B1 (pt)
EP (1) EP0952684B1 (pt)
JP (1) JPH11355189A (pt)
KR (1) KR19990083371A (pt)
CN (1) CN1234657A (pt)
BR (1) BR9901054A (pt)
CA (1) CA2266165C (pt)
TW (1) TW404106B (pt)

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3200547B2 (ja) * 1995-09-11 2001-08-20 株式会社日立製作所 Ｃｄｍａ方式移動通信システム
DE19850279B4 (de) * 1998-10-30 2005-12-22 Robert Bosch Gmbh Verfahren für die Übertragung von Signalen zwischen einer ersten Funkstation und einer zweiten Funkstation und Funkstation
US6128330A (en) 1998-11-24 2000-10-03 Linex Technology, Inc. Efficient shadow reduction antenna system for spread spectrum
EP1063790B1 (en) * 1999-06-24 2002-05-29 Alcatel Diversity transmission in a Mobile Radio System
US6721339B2 (en) * 1999-08-17 2004-04-13 Lucent Technologies Inc. Method of providing downlink transmit diversity
JP2001267982A (ja) * 2000-03-22 2001-09-28 Matsushita Electric Ind Co Ltd Ｓｔｔｄエンコーディング方法およびダイバシティ送信機
DE60115233T2 (de) * 2000-05-25 2006-04-13 Samsung Electronics Co., Ltd., Suwon Gerät und verfahren für die diversity-übertragung mit mehr als zwei antennen
US7113745B2 (en) * 2001-02-21 2006-09-26 Ericsson Inc. Method to achieve diversity in a communication network
US6961545B2 (en) * 2001-04-09 2005-11-01 Atheros Communications, Inc. Method and system for providing antenna diversity
US6959047B1 (en) 2001-04-09 2005-10-25 At&T Corp Training-based channel estimation for multiple-antennas
GB2376601B (en) * 2001-06-15 2004-02-25 Motorola Inc Transmission diversity in a cellular radio communication system
JP3997890B2 (ja) 2001-11-13 2007-10-24 松下電器産業株式会社 送信方法及び送信装置
US7050832B2 (en) * 2001-11-28 2006-05-23 Arraycomm Llc Variable diversity transmission in a radio communications system based on characteristics of a received signal
US20030109282A1 (en) * 2001-12-06 2003-06-12 Itzhak Shperling Method and base station for providing phase-shift transmit diversity
US7499709B2 (en) * 2002-02-07 2009-03-03 Alcatel-Lucent Usa Inc. Method and apparatus for closed loop transmit diversity in a wireless communications system
US7116944B2 (en) * 2002-02-07 2006-10-03 Lucent Technologies Inc. Method and apparatus for feedback error detection in a wireless communications systems
US6873831B2 (en) 2002-04-01 2005-03-29 Qualcomm Incorporated Method and apparatus for transmit power modulation in a wireless communications system
US7127274B2 (en) * 2002-09-06 2006-10-24 Interdigital Ttechnology Corporation Method and system for reducing the effect of signal-interference in null areas caused by one or more antennas
US8428181B2 (en) 2002-12-02 2013-04-23 Research In Motion Limited Method and apparatus for optimizing transmitter power efficiency
US7471738B2 (en) * 2002-12-02 2008-12-30 Research In Motion Limited Method and apparatus for optimizing transmitter power efficiency
JP2004274452A (ja) * 2003-03-10 2004-09-30 Nippon Telegr & Teleph Corp <Ntt> トランシーバ
US20040185782A1 (en) * 2003-03-17 2004-09-23 Halford Steven Dennis Technique for selecting a signal path in an antenna system
US7333563B2 (en) 2004-02-20 2008-02-19 Research In Motion Limited Method and apparatus for improving power amplifier efficiency in wireless communication systems having high peak to average power ratios
US7643839B2 (en) * 2004-10-06 2010-01-05 Broadcom Corporation Method and system for diversity processing
US20060256747A1 (en) * 2005-05-16 2006-11-16 Mikko Jaakkola Terminal assisted WLAN access point rate adaptation
EP2027651B1 (en) 2006-06-14 2012-12-05 Research In Motion Limited Improved control of switcher regulated power amplifier modules
CA2616323C (en) * 2006-06-14 2011-08-02 Research In Motion Limited Input drive control for switcher regulated power amplifier modules
US8761305B2 (en) 2006-06-14 2014-06-24 Blackberry Limited Input drive control for switcher regulated power amplifier modules
JP5255986B2 (ja) * 2008-10-20 2013-08-07 株式会社日立ハイテクノロジーズ パターンドメディアの検査方法及び検査装置
US8620238B2 (en) 2010-07-23 2013-12-31 Blackberry Limited Method of power amplifier switching power control using post power amplifier power detection
JP6255946B2 (ja) * 2013-02-21 2018-01-10 ヤマハ株式会社 復調装置、音響伝送システム、プログラム及び復調方法
TWI717736B (zh) 2019-05-15 2021-02-01 財團法人工業技術研究院 多天線系統及其通道校正方法
CN115764265B (zh) * 2022-12-29 2025-01-28 嘉齐半导体(深圳)有限公司 一种全向天线、天线阵列及制作方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL100213A (en) * 1990-12-07 1995-03-30 Qualcomm Inc CDMA microcellular telephone system and distributed antenna system therefor
US5602834A (en) * 1990-12-07 1997-02-11 Qualcomm Incorporated Linear coverage area antenna system for a CDMA communication system
US5513176A (en) * 1990-12-07 1996-04-30 Qualcomm Incorporated Dual distributed antenna system
CH682195A5 (pt) * 1991-07-31 1993-07-30 Ascom Tech Ag
EP0562529A3 (en) * 1992-03-23 1996-11-27 Sharp Kk Spread spectrum communication system and method
US5260968A (en) * 1992-06-23 1993-11-09 The Regents Of The University Of California Method and apparatus for multiplexing communications signals through blind adaptive spatial filtering
US5375140A (en) * 1992-11-24 1994-12-20 Stanford Telecommunications, Inc. Wireless direct sequence spread spectrum digital cellular telephone system
US5614914A (en) * 1994-09-06 1997-03-25 Interdigital Technology Corporation Wireless telephone distribution system with time and space diversity transmission for determining receiver location
US5615227A (en) * 1994-11-21 1997-03-25 Pole Zero Corporation Transmitting spread spectrum data with commercial radio
US6085076A (en) * 1997-04-07 2000-07-04 Omnipoint Corporation Antenna diversity for wireless communication system

Also Published As

Publication number Publication date
TW404106B (en) 2000-09-01
KR19990083371A (ko) 1999-11-25
EP0952684A2 (en) 1999-10-27
CA2266165C (en) 2002-09-24
EP0952684A3 (en) 2002-04-03
JPH11355189A (ja) 1999-12-24
CA2266165A1 (en) 1999-10-21
US6205127B1 (en) 2001-03-20
EP0952684B1 (en) 2014-02-19
CN1234657A (zh) 1999-11-10

Similar Documents

Publication Publication Date Title
BR9901054A (pt) Sistema de telecomunicações sem fio que alivia o efeito de desvanecimento de múltiplas vias.
BR0312090A (pt) modos de transmissão por diversidade para sistemas de comunicação mimo ofdm
TW200742281A (en) Flexible time-frequency multiplexing structure for wireless communication
BR0109422A (pt) Sistema de comunicações com alta eficiência e alto desempenho empregando modulação por multiportadoras
BRPI0511810A (pt) sistema de modulação multiportadora com diversidade de retardo cìclico
WO2004025853A3 (en) Sub-banded ultra-wideband communication system
NO20006676D0 (no) Effektstyring i en flerbærebölge-radiosender
BR9810855A (pt) Método e aparelho para transmissão de sinais em um sistema de comunicação
BR9906447A (pt) Dispositico e processo de recepção para um sistema de comunicação móvel
BR9806005A (pt) Transmissão de sinais digitais por multiplexação por divisão de frequência ortonogal
BR9913277A (pt) Codificação de bloco-espaço e codificação de canal combinado em um arranjo de multi-antenas
BRPI0515014A (pt) método e dispositivo para seleção de sub-portadora e de antena em um sistema mimo
BRPI0418710A (pt) terminal de comunicação móvel e sistema de comunicação de rádio
WO2004062118A3 (en) An enhanced ofdm by use of alternating polarization states
BRPI0407628A (pt) codificação de superposição controlada em sistemas de comunicação multi-usuário
BR9814501A (pt) Processo para determinar uma potência de transmissão para um transceptor em um sistema de radiocomunicação, e, estação base
SE9600537D0 (sv) Improvements in or relating to OFDM systems
SI1304327T1 (pt)
BRPI0717312B8 (pt) pilotos de aquisição para sistemas de comunicação sem fio
EP1005179A3 (en) Methods and apparatus for wireless communication using time division duplex time-slotted CDMA
BRPI0607788A2 (pt) transmissão de sinal piloto para um sistema de comunição sem fio por divisão ortogonal de freqüência
GEP20033127B (en) Transmitter Diversity Technique for Wireless Communications
BR0116961A (pt) Transmissor para um sistema de comunicações sem fio usando códigos múltiplos e antenas múltiplas
BR9906521A (pt) Dispositivo e processo de controle de potência de enlace para a frente para um sistemade comunicações móveis que suporta uma função de diversidade de transmissão
FI20065057A0 (fi) Tehoa säästävä langaton tiedonsiirto

Legal Events

Date Code Title Description
B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A 3A ANUIDADE.

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 1921 DE 30/10/2007.

B15K Others concerning applications: alteration of classification

Ipc: H04B 7/06 (2006.01)