BR0003460A - Método para melhorar a diversidade de transmissão - Google Patents

Método para melhorar a diversidade de transmissão

Info

Publication number
BR0003460A
BR0003460A BR0003460-6A BR0003460A BR0003460A BR 0003460 A BR0003460 A BR 0003460A BR 0003460 A BR0003460 A BR 0003460A BR 0003460 A BR0003460 A BR 0003460A
Authority
BR
Brazil
Prior art keywords
transmitted
channels
transmission diversity
carrier
improve transmission
Prior art date
Application number
BR0003460-6A
Other languages
English (en)
Inventor
Quinn Li
Nallepilli S 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 BR0003460A publication Critical patent/BR0003460A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0071—Use of interleaving
    • 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
    • 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
    • H04B7/12—Frequency diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/16—Code allocation
    • H04J13/18—Allocation of orthogonal codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/04—Arrangements for detecting or preventing errors in the information received by diversity reception using frequency diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control

Landscapes

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

Abstract

<B>MéTODO PARA MELHORAR A DIVERSIDADE DE TRANSMISSãO<D> Um transmissor para comunicação sem fio propicia múltiplos tipos de ortogonalidade para melhorar a diversidade de transmissão. A diversidade de transmissão é melhorada mediante a utilização de ortogonalidade tanto de codificação como de freq³ência de portadora. Os dados a serem transmitidos são quebrados em quatro canais paralelos. Dois dos canais são transmitidos por um primeiro sinal de portadora e os outros dois canais são transmitidos por um segundo sinal de portadora. Os canais transmitidos pelo mesmo sinal de portadora são munidos de códigos ortogonais, de modo que possam ser separados por um receptor. Os canais transmitidos por diferentes sinais de portadora podem ser codificados com códigos ortogonais idênticos. Os sinais de portadora modulados são, em seguida, transmitidos mediante a utilização de pelo menos duas antenas, onde uma antena é utilizada para cada portadora.
BR0003460-6A 1999-08-17 2000-08-09 Método para melhorar a diversidade de transmissão BR0003460A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/375,598 US6721339B2 (en) 1999-08-17 1999-08-17 Method of providing downlink transmit diversity

Publications (1)

Publication Number Publication Date
BR0003460A true BR0003460A (pt) 2001-04-03

Family

ID=23481512

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0003460-6A BR0003460A (pt) 1999-08-17 2000-08-09 Método para melhorar a diversidade de transmissão

Country Status (8)

Country Link
US (1) US6721339B2 (pt)
EP (1) EP1077537A3 (pt)
JP (1) JP2001086045A (pt)
KR (1) KR100661679B1 (pt)
CN (1) CN1286537A (pt)
AU (1) AU5193800A (pt)
BR (1) BR0003460A (pt)
CA (1) CA2315579A1 (pt)

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US7154958B2 (en) * 2000-07-05 2006-12-26 Texas Instruments Incorporated Code division multiple access wireless system with time reversed space time block transmitter diversity
US6870825B1 (en) * 2000-09-06 2005-03-22 Lucent Technologies Inc. Pilot signal transmission in a multi-transmit antenna wireless communication system
KR100378111B1 (ko) * 2001-04-02 2003-03-29 삼성전자주식회사 광증폭기 및 이를 이용한 양방향 파장분할 다중 광통신시스템
BR0116961A (pt) * 2001-04-05 2005-01-11 Nortel Networks Ltd Transmissor para um sistema de comunicações sem fio usando códigos múltiplos e antenas múltiplas
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
EP1551127A1 (en) * 2001-12-21 2005-07-06 Mitsubishi Denki Kabushiki Kaisha Radio communication system and transmitter for implementing frequency diversity
KR100478255B1 (ko) * 2002-02-21 2005-03-25 공형윤 Ｃｄｍａ 통신에서 전송율을 향상시키고 비트 에러율을개선한 변조 및 복조 방법
US7418050B1 (en) * 2002-05-09 2008-08-26 Qualcomm Incorporated MIMO modulation in a wireless network with at least one degenerate node
KR100526510B1 (ko) * 2002-09-30 2005-11-08 삼성전자주식회사 이동 통신시스템의 다중 안테나 신호 송수신 장치 및 방법
US7986742B2 (en) 2002-10-25 2011-07-26 Qualcomm Incorporated Pilots for MIMO communication system
US7002900B2 (en) * 2002-10-25 2006-02-21 Qualcomm Incorporated Transmit diversity processing for a multi-antenna communication system
US8320301B2 (en) 2002-10-25 2012-11-27 Qualcomm Incorporated MIMO WLAN system
US8208364B2 (en) 2002-10-25 2012-06-26 Qualcomm Incorporated MIMO system with multiple spatial multiplexing modes
US20040081131A1 (en) 2002-10-25 2004-04-29 Walton Jay Rod OFDM communication system with multiple OFDM symbol sizes
US7280467B2 (en) * 2003-01-07 2007-10-09 Qualcomm Incorporated Pilot transmission schemes for wireless multi-carrier communication systems
US7983355B2 (en) * 2003-07-09 2011-07-19 Broadcom Corporation System and method for RF signal combining and adaptive bit loading for data rate maximization in multi-antenna communication systems
US8185075B2 (en) * 2003-03-17 2012-05-22 Broadcom Corporation System and method for channel bonding in multiple antenna communication systems
US7822140B2 (en) * 2003-03-17 2010-10-26 Broadcom Corporation Multi-antenna communication systems utilizing RF-based and baseband signal weighting and combining
US8391322B2 (en) 2003-07-09 2013-03-05 Broadcom Corporation Method and system for single weight (SW) antenna system for spatial multiplexing (SM) MIMO system for WCDMA/HSDPA
US7418042B2 (en) * 2003-09-17 2008-08-26 Atheros Communications, Inc. Repetition coding for a wireless system
US9473269B2 (en) 2003-12-01 2016-10-18 Qualcomm Incorporated Method and apparatus for providing an efficient control channel structure in a wireless communication system
US7315563B2 (en) * 2003-12-03 2008-01-01 Ut-Battelle Llc Multicarrier orthogonal spread-spectrum (MOSS) data communications
US7466749B2 (en) * 2005-05-12 2008-12-16 Qualcomm Incorporated Rate selection with margin sharing
KR100881371B1 (ko) * 2007-05-04 2009-02-02 이동수 무선 다중접속에 의한 실시간 동영상 전송장치, 무선다중접속에 의한 실시간 동영상 수신장치, 무선 다중접속에의한 실시간 동영상 송수신장치 및 무선 다중접속에 의한실시간 동영상 송수신 방법
US7983306B2 (en) * 2008-07-23 2011-07-19 Conexant Systems, Inc. Method and apparatus for channelizing sampled broadband signal

Family Cites Families (20)

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Publication number Priority date Publication date Assignee Title
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
JPH08195703A (ja) * 1995-01-17 1996-07-30 Toshiba Corp 無線通信装置
US5623485A (en) * 1995-02-21 1997-04-22 Lucent Technologies Inc. Dual mode code division multiple access communication system and method
JP3338747B2 (ja) * 1995-12-28 2002-10-28 日本電気株式会社 干渉波除去装置
US5930230A (en) * 1996-05-28 1999-07-27 Qualcomm Incorporated High data rate CDMA wireless communication system
US6256290B1 (en) * 1996-09-13 2001-07-03 Lucent Technologies, Inc. Multi-carrier CDMA transmission system with frequency and transmit diversity
US5805567A (en) * 1996-09-13 1998-09-08 Lucent Technologies Inc. Orthogonal modulation scheme
US6173007B1 (en) * 1997-01-15 2001-01-09 Qualcomm Inc. High-data-rate supplemental channel for CDMA telecommunications system
US5923650A (en) * 1997-04-08 1999-07-13 Qualcomm Incorporated Method and apparatus for reverse link rate scheduling
US6141542A (en) * 1997-07-31 2000-10-31 Motorola, Inc. Method and apparatus for controlling transmit diversity in a communication system
US6173005B1 (en) 1997-09-04 2001-01-09 Motorola, Inc. Apparatus and method for transmitting signals in a communication system
US6185266B1 (en) * 1997-10-07 2001-02-06 Motorola, Inc. Method and system for generating a power control metric in an orthogonal transmit diversity communication system
US6205127B1 (en) * 1998-04-21 2001-03-20 Lucent Technologies, Inc. Wireless telecommunications system that mitigates the effect of multipath fading
US6154485A (en) * 1998-10-19 2000-11-28 Motorola, Inc. Receiver in a wireless communications system for receiving signals having combined orthogonal transmit diversity and adaptive array techniques
US6317411B1 (en) * 1999-02-22 2001-11-13 Motorola, Inc. Method and system for transmitting and receiving signals transmitted from an antenna array with transmit diversity techniques
US6356528B1 (en) * 1999-04-15 2002-03-12 Qualcomm Incorporated Interleaver and deinterleaver for use in a diversity transmission communication system
US6421327B1 (en) * 1999-06-28 2002-07-16 Qualcomm Incorporated Method and apparatus for controlling transmission energy in a communication system employing orthogonal transmit diversity
US6327299B1 (en) * 1999-08-31 2001-12-04 Motorola, Inc. Method and system for measuring and adjusting the quality of an orthogonal transmit diversity signal in a wireless communications system
US6317410B1 (en) * 1999-09-13 2001-11-13 Lucent Technologies Inc. Receiver architecture employing space time spreading and orthogonal transmit diversity techniques
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Also Published As

Publication number Publication date
EP1077537A2 (en) 2001-02-21
JP2001086045A (ja) 2001-03-30
CA2315579A1 (en) 2001-02-17
CN1286537A (zh) 2001-03-07
US20030007463A1 (en) 2003-01-09
AU5193800A (en) 2001-02-22
US6721339B2 (en) 2004-04-13
EP1077537A3 (en) 2003-04-16
KR100661679B1 (ko) 2006-12-26
KR20010050083A (ko) 2001-06-15

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Legal Events

Date Code Title Description
B11A Dismissal acc. art.33 of ipl - examination not requested within 36 months of filing
B11Y Definitive dismissal - extension of time limit for request of examination expired [chapter 11.1.1 patent gazette]
B15K Others concerning applications: alteration of classification

Ipc: H04L 1/00 (2006.01), H04B 7/06 (2006.01), H04B 7/1