BRPI0513697A - transmissão piloto e estimação de canal para múltiplos transmissores - Google Patents

transmissão piloto e estimação de canal para múltiplos transmissores

Info

Publication number
BRPI0513697A
BRPI0513697A BRPI0513697-0A BRPI0513697A BRPI0513697A BR PI0513697 A BRPI0513697 A BR PI0513697A BR PI0513697 A BRPI0513697 A BR PI0513697A BR PI0513697 A BRPI0513697 A BR PI0513697A
Authority
BR
Brazil
Prior art keywords
code
time
pilot
frequency
impulse response
Prior art date
Application number
BRPI0513697-0A
Other languages
English (en)
Inventor
Dhananjay Ashok Gore
Avneesh Agrawal
Tamer Kadous
Original Assignee
Qualcomm 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 Qualcomm Inc filed Critical Qualcomm Inc
Publication of BRPI0513697A publication Critical patent/BRPI0513697A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0204—Channel estimation of multiple channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0212—Channel estimation of impulse response
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0226—Channel estimation using sounding signals sounding signals per se

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Transmitters (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

TRAMSMISSãO PILOTO E ESTIMAçãO DE CANAL PAPA MúLTIPLOS TRANSMISSõRES Cada transmissor recebe um código piloto de tempo apenas, um código piloto de freqüência apenas, ou um código piloto de tempo e freqüência para uso para a transmissão piloto. Os códigos piloto podem ser pseudo-aleatórios, ortogonais e/ou códigos de mudança cíclica. Para obter uma estimação de canal para um transmissor utilizando um código piloto de tempo e freqüência composto de um código de tempo apenas e um código de freqüência apenas, um receptor multiplica um conjunto de símbolos recebidos para cada período de símbolo por um conjunto de valores de código para o código de freqüência apenas para obter um conjunto de símbolos detectados e realiza uma IDFT no conjunto de símbolos detectados para obter uma estimação de resposta a impulso inicial. O receptor realiza a combinação de código nas múltiplas estimações de resposta a impulso inicial derivadas para múltiplos períodos de símbolo com o código de tempo apenas para obtenção de uma estimação de resposta a impulso final para o transmissor desejado. O receptor retém as primeiras L derivações de canal e zera as derivações de canal restantes, onde L é o comprimento de canal esperado.
BRPI0513697-0A 2004-07-22 2005-07-11 transmissão piloto e estimação de canal para múltiplos transmissores BRPI0513697A (pt)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US59086404P 2004-07-22 2004-07-22
US11/022,146 US7418046B2 (en) 2004-07-22 2004-12-22 Pilot transmission and channel estimation for multiple transmitters
PCT/US2005/024612 WO2006019708A1 (en) 2004-07-22 2005-07-11 Pilot transmission and channel estimation for multiple transmitters

Publications (1)

Publication Number Publication Date
BRPI0513697A true BRPI0513697A (pt) 2008-05-13

Family

ID=35094088

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0513697-0A BRPI0513697A (pt) 2004-07-22 2005-07-11 transmissão piloto e estimação de canal para múltiplos transmissores

Country Status (13)

Country Link
US (2) US7418046B2 (pt)
EP (1) EP1774735A1 (pt)
JP (1) JP2008507901A (pt)
KR (1) KR100863469B1 (pt)
AR (1) AR050006A1 (pt)
AU (2) AU2005275339A1 (pt)
BR (1) BRPI0513697A (pt)
CA (1) CA2574795A1 (pt)
IL (1) IL180863A0 (pt)
MX (1) MX2007000859A (pt)
RU (1) RU2350030C2 (pt)
TW (1) TW200625883A (pt)
WO (1) WO2006019708A1 (pt)

Families Citing this family (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7394858B2 (en) * 2003-08-08 2008-07-01 Intel Corporation Systems and methods for adaptive bit loading in a multiple antenna orthogonal frequency division multiplexed communication system
WO2006015108A2 (en) * 2004-07-27 2006-02-09 Zte San Diego, Inc. Transmission and reception of reference preamble signals in ofdma or ofdm communication systems
US8135088B2 (en) * 2005-03-07 2012-03-13 Q1UALCOMM Incorporated Pilot transmission and channel estimation for a communication system utilizing frequency division multiplexing
US8126066B2 (en) * 2005-06-09 2012-02-28 Telefonaktiebolaget Lm Ericsson (Publ) Time and frequency channel estimation
JP4588548B2 (ja) * 2005-06-15 2010-12-01 株式会社エヌ・ティ・ティ・ドコモ 受信装置及び受信方法
CN101313502B (zh) * 2005-10-03 2012-12-12 夏普株式会社 发送机、ofdm通信系统以及发送方法
US8311132B2 (en) * 2005-11-30 2012-11-13 Agere Systems Inc. Pilot-assisted doppler frequency estimation
EP1950924A1 (en) * 2005-12-01 2008-07-30 Matsushita Electric Industrial Co., Ltd. Radio sending device, and radio sending method
KR100913089B1 (ko) 2006-02-07 2009-08-21 엘지전자 주식회사 다중 반송파 시스템에 적용되는 파일럿 신호 전송 방법
US7848438B2 (en) * 2006-02-14 2010-12-07 Motorola Mobility, Inc. Method and apparatus for pilot signal transmission
US8689025B2 (en) * 2006-02-21 2014-04-01 Qualcomm Incorporated Reduced terminal power consumption via use of active hold state
US8077595B2 (en) 2006-02-21 2011-12-13 Qualcomm Incorporated Flexible time-frequency multiplexing structure for wireless communication
KR101119455B1 (ko) * 2006-02-21 2012-03-20 퀄컴 인코포레이티드 Ｏｆｄｍ 및 ｃｄｍａ 방식을 지원하는 방법 및 장치
US9461736B2 (en) * 2006-02-21 2016-10-04 Qualcomm Incorporated Method and apparatus for sub-slot packets in wireless communication
FR2897999A1 (fr) * 2006-02-27 2007-08-31 St Microelectronics Sa Procede et dispositif d'estimation de la fonction de transfert du canal de transmission pour demodulateur cofdm
FR2897998A1 (fr) * 2006-02-27 2007-08-31 St Microelectronics Sa Procede et dispositif d'estimation de la fonction de transfert du canal de transmission pour demodulateur cofdm
KR20070106913A (ko) * 2006-05-01 2007-11-06 엘지전자 주식회사 통신 시스템에서의 코드 시퀀스 생성 방법 및 송신 장치
US8094638B2 (en) * 2006-08-22 2012-01-10 Texas Instruments Incorporated Adaptive selection of transmission parameters for reference signals
US8457039B2 (en) * 2006-10-24 2013-06-04 Texas Instruments Incorporated Random access channel design with hybrid CDM and FDM multiplexing of access
US7957759B2 (en) * 2006-12-08 2011-06-07 Texas Instruments Incorporated Wideband reference signal transmission in SC-FDMA communication systems
US8130867B2 (en) * 2007-01-05 2012-03-06 Qualcomm Incorporated Pilot design for improved channel and interference estimation
CN104052566B (zh) * 2007-01-05 2017-06-16 三星电子株式会社 单载波频分多址系统中发送和接收控制信息的方法和装置
GB2463194B (en) * 2007-05-30 2011-10-12 Lg Electronics Inc Method of transmitting control signal in wireless communication system
EP2195982A1 (en) * 2007-08-31 2010-06-16 Nextivity, Inc. Ofdm modem using pilot sub-carrier structure
US8509325B2 (en) * 2008-07-01 2013-08-13 Qualcomm Incorporated Adaptive thresholding for OFDM channel estimation
KR20100070751A (ko) * 2008-12-18 2010-06-28 한국전자통신연구원 무선 통신 시스템의 채널 추정 방법 및 그 장치
TWI448116B (zh) * 2012-03-15 2014-08-01 Nat Univ Tsing Hua 最佳化通道估測之正交分頻多工系統及最佳化正交分頻多工系統通道估測之方法
US9191875B1 (en) * 2013-08-14 2015-11-17 Sprint Spectrum L.P. Use of concurrent pilot signals at different transmission power levels
US20160226603A1 (en) * 2015-01-30 2016-08-04 Alex Stephenne Method and system for validating interfering signals
KR102403502B1 (ko) * 2015-10-13 2022-05-30 삼성전자 주식회사 무선 통신 시스템에서 채널 상태 추정 방법 및 장치
US10461891B2 (en) * 2015-12-18 2019-10-29 Qualcomm Incorporated Staggered pilot placement
JP7004062B2 (ja) * 2018-03-09 2022-01-21 日本電気株式会社 無線装置及びチャネル予測方法
US10432272B1 (en) 2018-11-05 2019-10-01 XCOM Labs, Inc. Variable multiple-input multiple-output downlink user equipment
US10659112B1 (en) 2018-11-05 2020-05-19 XCOM Labs, Inc. User equipment assisted multiple-input multiple-output downlink configuration
US10812216B2 (en) 2018-11-05 2020-10-20 XCOM Labs, Inc. Cooperative multiple-input multiple-output downlink scheduling
US10756860B2 (en) 2018-11-05 2020-08-25 XCOM Labs, Inc. Distributed multiple-input multiple-output downlink configuration
US11290172B2 (en) 2018-11-27 2022-03-29 XCOM Labs, Inc. Non-coherent cooperative multiple-input multiple-output communications
US10756795B2 (en) 2018-12-18 2020-08-25 XCOM Labs, Inc. User equipment with cellular link and peer-to-peer link
US11063645B2 (en) 2018-12-18 2021-07-13 XCOM Labs, Inc. Methods of wirelessly communicating with a group of devices
US11330649B2 (en) 2019-01-25 2022-05-10 XCOM Labs, Inc. Methods and systems of multi-link peer-to-peer communications
US10756767B1 (en) 2019-02-05 2020-08-25 XCOM Labs, Inc. User equipment for wirelessly communicating cellular signal with another user equipment
US11032841B2 (en) 2019-04-26 2021-06-08 XCOM Labs, Inc. Downlink active set management for multiple-input multiple-output communications
US10756782B1 (en) 2019-04-26 2020-08-25 XCOM Labs, Inc. Uplink active set management for multiple-input multiple-output communications
US10735057B1 (en) 2019-04-29 2020-08-04 XCOM Labs, Inc. Uplink user equipment selection
US10686502B1 (en) 2019-04-29 2020-06-16 XCOM Labs, Inc. Downlink user equipment selection
US11411778B2 (en) 2019-07-12 2022-08-09 XCOM Labs, Inc. Time-division duplex multiple input multiple output calibration
CN110971547B (zh) * 2019-11-20 2020-10-27 浙江大学 一种基于毫米波/太赫兹的宽带大规模终端检测和信道估计方法
US11411779B2 (en) 2020-03-31 2022-08-09 XCOM Labs, Inc. Reference signal channel estimation
CA3175361A1 (en) 2020-04-15 2021-10-21 Tamer Adel Kadous Wireless network multipoint association and diversity
CA3178604A1 (en) 2020-05-26 2021-12-02 XCOM Labs, Inc. Interference-aware beamforming
KR20230091910A (ko) 2020-10-19 2023-06-23 엑스콤 랩스 인코퍼레이티드 무선 통신 시스템에서의 참조 신호
WO2022093988A1 (en) 2020-10-30 2022-05-05 XCOM Labs, Inc. Clustering and/or rate selection in multiple-input multiple-output communication systems

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002009334A1 (fr) * 2000-07-26 2002-01-31 Mitsubishi Denki Kabushiki Kaisha Dispositif de communication a acces multiple par repartition de code (amrc) multiporteuse, dispositif d'emission amrc multiporteuse et dispositif de reception amrc multiporteuse
US6850481B2 (en) 2000-09-01 2005-02-01 Nortel Networks Limited Channels estimation for multiple input—multiple output, orthogonal frequency division multiplexing (OFDM) system
JP3553038B2 (ja) * 2000-11-06 2004-08-11 株式会社エヌ・ティ・ティ・ドコモ 信号送信方法、信号受信方法、送信装置、受信装置および記録媒体
US6980539B2 (en) * 2000-11-06 2005-12-27 Ntt Docomo, Inc. Mobile communication system in multi-carrier CDMA scheme using short code and long code
WO2002061170A1 (en) 2001-01-31 2002-08-08 Pall Corporation Purification systems, methods and devices
US20020118783A1 (en) * 2001-02-26 2002-08-29 Peter Cripps Smart antenna based spectrum multiplexing using a pilot signal
US20020176485A1 (en) * 2001-04-03 2002-11-28 Hudson John E. Multi-cast communication system and method of estimating channel impulse responses therein
EP1378072A2 (en) 2001-04-03 2004-01-07 Nortel Networks Limited Communication system and methods of estimating channel impulse responses therein
US7139320B1 (en) * 2001-10-11 2006-11-21 Texas Instruments Incorporated Method and apparatus for multicarrier channel estimation and synchronization using pilot sequences
EP1467508B1 (en) * 2002-01-10 2011-05-11 Fujitsu Limited Pilot multiplex method in ofdm system and ofdm receiving method
GB2393618B (en) 2002-09-26 2004-12-15 Toshiba Res Europ Ltd Transmission signals methods and apparatus
US6999467B2 (en) * 2003-07-28 2006-02-14 Motorola, Inc. Method and apparatus for transmission and reception within an OFDM communication system
US7242722B2 (en) * 2003-10-17 2007-07-10 Motorola, Inc. Method and apparatus for transmission and reception within an OFDM communication system
US8077691B2 (en) * 2004-03-05 2011-12-13 Qualcomm Incorporated Pilot transmission and channel estimation for MISO and MIMO receivers in a multi-antenna system
US7457231B2 (en) * 2004-05-04 2008-11-25 Qualcomm Incorporated Staggered pilot transmission for channel estimation and time tracking

Also Published As

Publication number Publication date
AU2010200658A1 (en) 2010-03-11
IL180863A0 (en) 2007-07-04
US20060018411A1 (en) 2006-01-26
RU2350030C2 (ru) 2009-03-20
KR20070044033A (ko) 2007-04-26
JP2008507901A (ja) 2008-03-13
AU2005275339A1 (en) 2006-02-23
US7418046B2 (en) 2008-08-26
KR100863469B1 (ko) 2008-10-16
WO2006019708A1 (en) 2006-02-23
TW200625883A (en) 2006-07-16
EP1774735A1 (en) 2007-04-18
RU2007106712A (ru) 2008-08-27
MX2007000859A (es) 2007-05-23
CA2574795A1 (en) 2006-02-23
AR050006A1 (es) 2006-09-20
US20080112495A1 (en) 2008-05-15

Similar Documents

Publication Publication Date Title
BRPI0513697A (pt) transmissão piloto e estimação de canal para múltiplos transmissores
WO2018209124A3 (en) Slot structure design using guard intervals in a single carrier waveform
ATE414372T1 (de) Funk-übertragung mit variabler länge des guard intervals
MA31257B1 (fr) Identification d'espacement de sous-porteuse
BRPI0511810A (pt) sistema de modulação multiportadora com diversidade de retardo cìclico
ATE429760T1 (de) Kanalschätzungsoptimierung
AR056084A1 (es) Metodo y aparato para la comunicacion de pilotos en un sistema de comunicaciones inalambrico de multiples antenas
TW200601754A (en) Channel estimation for a communication system using spectral estimation
EP4344109A3 (en) Improved initial and retransmissions of data for v2x transmissions
ATE494713T1 (de) Kanal-und interferenzschätzung mit definierten piloten in ofdma-systemen
BR112021018382A2 (pt) Projeto de forma de onda de sinal de referência de sonorização para comunicações sem fio
GB2459807A (en) Method of transmitting control signals in wireless communication system
ATE472882T1 (de) Iterative kanal- und störungsschätzung mit fest zugeordneten pilottönen für ofdma
BR0312090A (pt) modos de transmissão por diversidade para sistemas de comunicação mimo ofdm
ATE547916T1 (de) Abfolgesteuerungs-einrichtung
ATE428247T1 (de) Gestufte pilotenubertragung zur kanalschatzung und zeitverfolgung
AR047452A1 (es) Un metodo para estimar una respuesta de frecuencia de un canal inalambrico en un sistema de comunicaciones inalambrico y un aparato que utiliza dicho metodo
TW200611519A (en) Transmitting high rate data within a MIMO WLAN
GB2512394A8 (en) Transmitter and method of transmitting
MX2021013283A (es) Método para la transmisión o recepción de señal en un sistema de comunicación inalámbrico y dispositivo para soportar el mismo.
BRPI0520299A2 (pt) método de gerenciamento de recursos de comunicação, método de transmissão de informação por um nó de transmissão e, sistema para gerenciamento de recursos de comunicação em um sistema de comunicação sem fio, nó de rede, e, nó de transmissor
AR066818A1 (es) Metodos y aparatos para implementar una medicion de la calidad de la senal digital
JP2012239188A5 (pt)
WO2011008941A3 (en) Facilitating noise estimation in wireless communication
HK1084534A1 (en) Channel estimation feedback in an orthogonal frequency division multiplexing system or the like

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 7A 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 2158 DE 15/05/2012.