BRPI0513697A - transmissão piloto e estimação de canal para múltiplos transmissores - Google Patents
transmissão piloto e estimação de canal para múltiplos transmissoresInfo
- 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
Links
- 230000005540 biological transmission Effects 0.000 title abstract 3
- 125000004122 cyclic group Chemical group 0.000 abstract 1
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)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (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.
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) |
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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 |
CA2575317C (en) * | 2004-07-27 | 2012-12-11 | 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 |
JP4813496B2 (ja) * | 2005-10-03 | 2011-11-09 | シャープ株式会社 | 送信機、ofdm通信システム及び送信方法 |
US8311132B2 (en) * | 2005-11-30 | 2012-11-13 | Agere Systems Inc. | Pilot-assisted doppler frequency estimation |
JP4964143B2 (ja) * | 2005-12-01 | 2012-06-27 | パナソニック株式会社 | 無線送信装置及び無線送信方法 |
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 |
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 |
US8689025B2 (en) * | 2006-02-21 | 2014-04-01 | Qualcomm Incorporated | Reduced terminal power consumption via use of active hold state |
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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 |
PT1942597E (pt) * | 2007-01-05 | 2013-05-13 | Samsung Electronics Co Ltd | Método e aparelho para transmitir e receber informação de controlo para aplicar aleatoriedade a uma interferência inter-celular num sistema de comunicações móveis |
GB2463194B (en) | 2007-05-30 | 2011-10-12 | Lg Electronics Inc | Method of transmitting control signal in wireless communication system |
CN101861717A (zh) | 2007-08-31 | 2010-10-13 | 奈克斯蒂维蒂有限公司 | 应用导频子载波结构的ofdm调制解调器 |
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 |
WO2019172412A1 (ja) * | 2018-03-09 | 2019-09-12 | 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 |
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 |
US10659112B1 (en) | 2018-11-05 | 2020-05-19 | XCOM Labs, Inc. | User equipment assisted multiple-input multiple-output downlink configuration |
CA3119325C (en) | 2018-11-27 | 2023-07-04 | XCOM Labs, Inc. | Non-coherent cooperative multiple-input multiple-output communications |
US11063645B2 (en) | 2018-12-18 | 2021-07-13 | XCOM Labs, Inc. | Methods of wirelessly communicating with a group of devices |
US10756795B2 (en) | 2018-12-18 | 2020-08-25 | XCOM Labs, Inc. | User equipment with cellular link and peer-to-peer link |
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 |
KR20230015932A (ko) | 2020-05-26 | 2023-01-31 | 엑스콤 랩스 인코퍼레이티드 | 간섭-인식 빔포밍 |
WO2022087569A1 (en) | 2020-10-19 | 2022-04-28 | XCOM Labs, Inc. | Reference signal for wireless communication systems |
WO2022093988A1 (en) | 2020-10-30 | 2022-05-05 | XCOM Labs, Inc. | Clustering and/or rate selection in multiple-input multiple-output communication systems |
WO2022241436A1 (en) | 2021-05-14 | 2022-11-17 | XCOM Labs, Inc. | Scrambling identifiers for wireless communication systems |
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US7242722B2 (en) * | 2003-10-17 | 2007-07-10 | Motorola, Inc. | Method and apparatus for transmission and reception within an OFDM communication system |
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US7457231B2 (en) * | 2004-05-04 | 2008-11-25 | Qualcomm Incorporated | Staggered pilot transmission for channel estimation and time tracking |
-
2004
- 2004-12-22 US US11/022,146 patent/US7418046B2/en not_active Expired - Fee Related
-
2005
- 2005-07-11 MX MX2007000859A patent/MX2007000859A/es active IP Right Grant
- 2005-07-11 JP JP2007522553A patent/JP2008507901A/ja active Pending
- 2005-07-11 WO PCT/US2005/024612 patent/WO2006019708A1/en active Application Filing
- 2005-07-11 BR BRPI0513697-0A patent/BRPI0513697A/pt not_active IP Right Cessation
- 2005-07-11 AU AU2005275339A patent/AU2005275339A1/en not_active Abandoned
- 2005-07-11 CA CA002574795A patent/CA2574795A1/en not_active Abandoned
- 2005-07-11 RU RU2007106712/09A patent/RU2350030C2/ru not_active IP Right Cessation
- 2005-07-11 EP EP05770028A patent/EP1774735A1/en not_active Withdrawn
- 2005-07-11 KR KR1020077004256A patent/KR100863469B1/ko not_active Expired - Fee Related
- 2005-07-21 AR ARP050103027A patent/AR050006A1/es unknown
- 2005-07-21 TW TW094124692A patent/TW200625883A/zh unknown
-
2007
- 2007-01-22 IL IL180863A patent/IL180863A0/en unknown
- 2007-10-16 US US11/873,375 patent/US20080112495A1/en not_active Abandoned
-
2010
- 2010-02-23 AU AU2010200658A patent/AU2010200658A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
RU2350030C2 (ru) | 2009-03-20 |
US7418046B2 (en) | 2008-08-26 |
MX2007000859A (es) | 2007-05-23 |
US20080112495A1 (en) | 2008-05-15 |
WO2006019708A1 (en) | 2006-02-23 |
AU2005275339A1 (en) | 2006-02-23 |
AR050006A1 (es) | 2006-09-20 |
IL180863A0 (en) | 2007-07-04 |
TW200625883A (en) | 2006-07-16 |
CA2574795A1 (en) | 2006-02-23 |
US20060018411A1 (en) | 2006-01-26 |
AU2010200658A1 (en) | 2010-03-11 |
EP1774735A1 (en) | 2007-04-18 |
KR20070044033A (ko) | 2007-04-26 |
JP2008507901A (ja) | 2008-03-13 |
RU2007106712A (ru) | 2008-08-27 |
KR100863469B1 (ko) | 2008-10-16 |
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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 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. |