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
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.
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 (32)
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 |
ES2178364T3 (es) * | 1999-06-24 | 2002-12-16 | Cit Alcatel | Transmision de diversidad en un sistema de radio movil. |
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 |
ATE311045T1 (de) * | 2000-05-25 | 2005-12-15 | Samsung Electronics Co Ltd | Vorrichtung und verfahren f r bertragungs- diversity durch verwendung von mehr als zwei antennen |
US7113745B2 (en) * | 2001-02-21 | 2006-09-26 | Ericsson Inc. | Method to achieve diversity in a communication network |
US6959047B1 (en) | 2001-04-09 | 2005-10-25 | At&T Corp | Training-based channel estimation for multiple-antennas |
US6961545B2 (en) * | 2001-04-09 | 2005-11-01 | Atheros Communications, Inc. | Method and system for providing antenna diversity |
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 |
US7116944B2 (en) * | 2002-02-07 | 2006-10-03 | Lucent Technologies Inc. | Method and apparatus for feedback error detection in a wireless communications systems |
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 |
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 |
US7471738B2 (en) * | 2002-12-02 | 2008-12-30 | Research In Motion Limited | Method and apparatus for optimizing transmitter power efficiency |
US8428181B2 (en) * | 2002-12-02 | 2013-04-23 | 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 |
US8761305B2 (en) | 2006-06-14 | 2014-06-24 | Blackberry Limited | Input drive control for switcher regulated power amplifier modules |
BRPI0702890B1 (pt) | 2006-06-14 | 2018-12-04 | Blackberry Ltd | transmissor para um dispositivo de comunicação sem fio e método de fornecer um sinal de voltagem de suprimento |
CA2616323C (en) * | 2006-06-14 | 2011-08-02 | Research In Motion 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 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5513176A (en) * | 1990-12-07 | 1996-04-30 | Qualcomm Incorporated | Dual distributed antenna system |
IL100213A (en) * | 1990-12-07 | 1995-03-30 | Qualcomm Inc | Mikrata Kedma phone system and its antenna distribution system |
US5602834A (en) * | 1990-12-07 | 1997-02-11 | Qualcomm Incorporated | Linear coverage area antenna system for a CDMA communication 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 |
-
1998
- 1998-04-21 US US09/063,690 patent/US6205127B1/en not_active Expired - Lifetime
-
1999
- 1999-03-18 CA CA002266165A patent/CA2266165C/en not_active Expired - Fee Related
- 1999-03-24 TW TW088104629A patent/TW404106B/zh not_active IP Right Cessation
- 1999-04-13 EP EP99302872.9A patent/EP0952684B1/en not_active Expired - Lifetime
- 1999-04-14 BR BR9901054-2A patent/BR9901054A/pt not_active IP Right Cessation
- 1999-04-20 CN CN99105202A patent/CN1234657A/zh active Pending
- 1999-04-21 JP JP11113408A patent/JPH11355189A/ja active Pending
- 1999-04-21 KR KR1019990014187A patent/KR19990083371A/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
JPH11355189A (ja) | 1999-12-24 |
US6205127B1 (en) | 2001-03-20 |
KR19990083371A (ko) | 1999-11-25 |
EP0952684A3 (en) | 2002-04-03 |
TW404106B (en) | 2000-09-01 |
EP0952684A2 (en) | 1999-10-27 |
CA2266165C (en) | 2002-09-24 |
EP0952684B1 (en) | 2014-02-19 |
CA2266165A1 (en) | 1999-10-21 |
CN1234657A (zh) | 1999-11-10 |
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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) |