BR0315664A - Detecção e demodulação de dados para sistemas de comunicação sem fio - Google Patents
Detecção e demodulação de dados para sistemas de comunicação sem fioInfo
- Publication number
- BR0315664A BR0315664A BR0315664-8A BR0315664A BR0315664A BR 0315664 A BR0315664 A BR 0315664A BR 0315664 A BR0315664 A BR 0315664A BR 0315664 A BR0315664 A BR 0315664A
- Authority
- BR
- Brazil
- Prior art keywords
- wireless communication
- communication systems
- detection
- received
- data
- Prior art date
Links
Classifications
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- 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
- 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
- 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
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/0848—Joint weighting
- H04B7/0854—Joint weighting using error minimizing algorithms, e.g. minimum mean squared error [MMSE], "cross-correlation" or matrix inversion
-
- 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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
- H04L1/0017—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy where the mode-switching is based on Quality of Service requirement
-
- 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
- H04L25/024—Channel estimation channel estimation algorithms
- H04L25/0242—Channel estimation channel estimation algorithms using matrix methods
-
- 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
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03343—Arrangements at the transmitter end
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0012—Modulated-carrier systems arrangements for identifying the type of modulation
-
- 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
-
- 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
-
- 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
- H04L27/2647—Arrangements specific to the receiver only
-
- 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
- H04B7/0669—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 channel coding 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
- H04B7/0697—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 spatial multiplexing
-
- 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
-
- 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
- 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
-
- 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
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
- H04W28/20—Negotiating bandwidth
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/50—TPC being performed in particular situations at the moment of starting communication in a multiple access environment
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Power Engineering (AREA)
- Quality & Reliability (AREA)
- Radio Transmission System (AREA)
- Mobile Radio Communication Systems (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
"DETECçãO E DEMODULAçãO DE DADOS PARA SISTEMAS DE COMUNICAçãO SEM FIO". A presente invenção apresenta técnicas para detectar e demodular transmissões de dados em sistemas de comunicação sem fio. Em um aspecto, um detector orientado à decisão detecta transmissões de dados em um sinal recebido mediante utilização de símbolos de dados recebidos bem como símbolos piloto recebidos. O detector orientado à decisão pode ser projetado para executar detecção diferencial no domínio da freq³ência ou detecção coerente no domínio do tempo, e pode ser usado com modulação de multi-portadora (por exemplo, OFDM). Em outro aspecto, um limite adaptativo é usado para executar detecção de transmissões de dados recebidas. Um limite pode ser determinado para cada transmissão hipotética de dados que tenha sido recebida. Como exemplo, o limite pode ser computado com base no sinal mais energia de ruído da transmissão hipotética de dados.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US42130902P | 2002-10-25 | 2002-10-25 | |
US43262602P | 2002-12-10 | 2002-12-10 | |
US10/692,833 US8170513B2 (en) | 2002-10-25 | 2003-10-23 | Data detection and demodulation for wireless communication systems |
PCT/US2003/034568 WO2004038989A2 (en) | 2002-10-25 | 2003-10-24 | Data detection and demodulation for wireless communication systems |
Publications (1)
Publication Number | Publication Date |
---|---|
BR0315664A true BR0315664A (pt) | 2005-08-30 |
Family
ID=32180513
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR0315664-8A BR0315664A (pt) | 2002-10-25 | 2003-10-24 | Detecção e demodulação de dados para sistemas de comunicação sem fio |
Country Status (11)
Country | Link |
---|---|
EP (2) | EP1556984A2 (pt) |
JP (2) | JP4981253B2 (pt) |
KR (1) | KR101035765B1 (pt) |
CN (2) | CN102014100B (pt) |
AU (2) | AU2003285112B2 (pt) |
BR (1) | BR0315664A (pt) |
CA (1) | CA2500849C (pt) |
IL (1) | IL202856A0 (pt) |
MX (1) | MXPA05004311A (pt) |
TW (1) | TWI341102B (pt) |
WO (1) | WO2004038989A2 (pt) |
Families Citing this family (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8194770B2 (en) | 2002-08-27 | 2012-06-05 | Qualcomm Incorporated | Coded MIMO systems with selective channel inversion applied per eigenmode |
US8218609B2 (en) | 2002-10-25 | 2012-07-10 | Qualcomm Incorporated | Closed-loop rate control for a multi-channel communication system |
US7324429B2 (en) | 2002-10-25 | 2008-01-29 | Qualcomm, Incorporated | Multi-mode terminal in a wireless MIMO system |
US8320301B2 (en) | 2002-10-25 | 2012-11-27 | Qualcomm Incorporated | MIMO WLAN system |
US8169944B2 (en) | 2002-10-25 | 2012-05-01 | Qualcomm Incorporated | Random access for wireless multiple-access communication systems |
US8134976B2 (en) | 2002-10-25 | 2012-03-13 | Qualcomm Incorporated | Channel calibration for a time division duplexed communication system |
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 |
US8570988B2 (en) | 2002-10-25 | 2013-10-29 | Qualcomm Incorporated | Channel calibration for a time division duplexed communication 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 |
US8170513B2 (en) | 2002-10-25 | 2012-05-01 | Qualcomm Incorporated | Data detection and demodulation for wireless communication systems |
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 |
EP1542488A1 (en) * | 2003-12-12 | 2005-06-15 | Telefonaktiebolaget LM Ericsson (publ) | Method and apparatus for allocating a pilot signal adapted to the channel characteristics |
US7466749B2 (en) | 2005-05-12 | 2008-12-16 | Qualcomm Incorporated | Rate selection with margin sharing |
US8358714B2 (en) | 2005-06-16 | 2013-01-22 | Qualcomm Incorporated | Coding and modulation for multiple data streams in a communication system |
CN100521668C (zh) * | 2005-09-14 | 2009-07-29 | 中国科学院上海微系统与信息技术研究所 | 低复杂度的多载波均衡接收装置及其接收方法 |
CN101388869B (zh) * | 2007-09-14 | 2012-01-04 | 扬智科技股份有限公司 | 减缓正交分频多工接收器窄带干扰的方法 |
US8010070B2 (en) * | 2007-10-09 | 2011-08-30 | Maxlinear, Inc. | Low-complexity diversity using coarse FFT and subband-wise combining |
JP5391816B2 (ja) * | 2009-05-08 | 2014-01-15 | ソニー株式会社 | 通信装置及び通信方法、コンピューター・プログラム、並びに通信システム |
JP5408109B2 (ja) * | 2010-11-15 | 2014-02-05 | 日本電気株式会社 | 閾値決定装置、閾値決定方法およびプログラム |
CN103348622B (zh) * | 2012-02-03 | 2017-05-10 | 华为技术有限公司 | 应用于微波通信系统的信号处理方法及设备 |
US9379794B2 (en) * | 2012-10-02 | 2016-06-28 | Qualcomm Incorporated | Scheduling transmission for multi-user, multiple-input, multiple-output data |
TWI734725B (zh) * | 2016-01-07 | 2021-08-01 | 美商內數位專利控股公司 | 多使用者(mu)傳輸保護方法及裝置 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
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US5506861A (en) | 1993-11-22 | 1996-04-09 | Ericsson Ge Mobile Comminications Inc. | System and method for joint demodulation of CDMA signals |
GB9521739D0 (en) * | 1995-10-24 | 1996-01-03 | Nat Transcommunications Ltd | Decoding carriers encoded using orthogonal frequency division multiplexing |
JPH09307526A (ja) * | 1996-05-17 | 1997-11-28 | Mitsubishi Electric Corp | デジタル放送受信機 |
JPH1051402A (ja) * | 1996-08-01 | 1998-02-20 | Nec Corp | 受信電界検出回路 |
JPH10303794A (ja) * | 1997-02-27 | 1998-11-13 | Mitsubishi Electric Corp | 既知系列検出器 |
FR2764143A1 (fr) * | 1997-05-27 | 1998-12-04 | Philips Electronics Nv | Procede de determination d'un format d'emission de symboles dans un systeme de transmission et systeme |
JPH1141159A (ja) * | 1997-07-15 | 1999-02-12 | Nippon Telegr & Teleph Corp <Ntt> | 通信装置 |
EP0895387A1 (de) * | 1997-07-28 | 1999-02-03 | Deutsche Thomson-Brandt Gmbh | Erkennung des Übertragungsmodus eines DVB-Signales |
JP3724940B2 (ja) * | 1998-01-08 | 2005-12-07 | 株式会社東芝 | Ofdmダイバーシチ受信装置 |
EP0938208A1 (en) * | 1998-02-22 | 1999-08-25 | Sony International (Europe) GmbH | Multicarrier transmission, compatible with the existing GSM system |
JP2001186051A (ja) * | 1999-12-24 | 2001-07-06 | Toshiba Corp | データ信号判定回路及び方法 |
CA2365129C (en) * | 1999-12-28 | 2007-12-18 | Ntt Docomo, Inc. | Path search method, channel estimation method and communication device |
KR100325367B1 (ko) * | 2000-01-28 | 2002-03-04 | 박태진 | 직교 주파수 분할 다중 통신 시스템에서의 비트 오율 측정장치및 방법 |
US6704374B1 (en) * | 2000-02-16 | 2004-03-09 | Thomson Licensing S.A. | Local oscillator frequency correction in an orthogonal frequency division multiplexing system |
US7927778B2 (en) * | 2004-12-29 | 2011-04-19 | Tokyo Ohka Kogyo Co., Ltd. | Chemically amplified positive photoresist composition for thick film, thick-film photoresist laminated product, manufacturing method for thick-film resist pattern, and manufacturing method for connection terminal |
-
2003
- 2003-10-24 CA CA2500849A patent/CA2500849C/en not_active Expired - Lifetime
- 2003-10-24 MX MXPA05004311A patent/MXPA05004311A/es active IP Right Grant
- 2003-10-24 CN CN2010106163220A patent/CN102014100B/zh not_active Expired - Lifetime
- 2003-10-24 AU AU2003285112A patent/AU2003285112B2/en not_active Ceased
- 2003-10-24 KR KR1020057006446A patent/KR101035765B1/ko active IP Right Grant
- 2003-10-24 EP EP03779427A patent/EP1556984A2/en not_active Withdrawn
- 2003-10-24 BR BR0315664-8A patent/BR0315664A/pt not_active IP Right Cessation
- 2003-10-24 EP EP10176291.2A patent/EP2262149B1/en not_active Expired - Lifetime
- 2003-10-24 JP JP2004547251A patent/JP4981253B2/ja not_active Expired - Lifetime
- 2003-10-24 TW TW092129768A patent/TWI341102B/zh not_active IP Right Cessation
- 2003-10-24 WO PCT/US2003/034568 patent/WO2004038989A2/en active Application Filing
- 2003-10-24 CN CN2003801020680A patent/CN1708935B/zh not_active Expired - Lifetime
-
2009
- 2009-07-02 AU AU2009202681A patent/AU2009202681A1/en not_active Abandoned
- 2009-12-20 IL IL202856A patent/IL202856A0/en unknown
-
2010
- 2010-04-15 JP JP2010094016A patent/JP5307070B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP2010213309A (ja) | 2010-09-24 |
WO2004038989A3 (en) | 2004-07-08 |
TW200501656A (en) | 2005-01-01 |
CN102014100A (zh) | 2011-04-13 |
WO2004038989A2 (en) | 2004-05-06 |
CN1708935A (zh) | 2005-12-14 |
EP2262149B1 (en) | 2018-08-29 |
EP2262149A3 (en) | 2013-05-08 |
AU2003285112A1 (en) | 2004-05-13 |
CA2500849C (en) | 2012-10-02 |
EP1556984A2 (en) | 2005-07-27 |
JP2006504342A (ja) | 2006-02-02 |
IL202856A0 (en) | 2011-07-31 |
KR101035765B1 (ko) | 2011-05-20 |
CN102014100B (zh) | 2013-03-06 |
AU2009202681A1 (en) | 2009-08-06 |
CN1708935B (zh) | 2011-06-22 |
EP2262149A2 (en) | 2010-12-15 |
TWI341102B (en) | 2011-04-21 |
JP5307070B2 (ja) | 2013-10-02 |
CA2500849A1 (en) | 2004-05-06 |
JP4981253B2 (ja) | 2012-07-18 |
KR20050071576A (ko) | 2005-07-07 |
AU2003285112B2 (en) | 2009-04-02 |
MXPA05004311A (es) | 2005-08-03 |
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Legal Events
Date | Code | Title | Description |
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B08F | Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette] |
Free format text: REFERENTE A 12A ANUIDADE. |
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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: EM VIRTUDE DO ARQUIVAMENTO PUBLICADO NA RPI 2329 DE 25-08-2015 E CONSIDERANDO AUSENCIA DE MANIFESTACAO DENTRO DOS PRAZOS LEGAIS, INFORMO QUE CABE SER MANTIDO O ARQUIVAMENTO DO PEDIDO DE PATENTE, CONFORME O DISPOSTO NO ARTIGO 12, DA RESOLUCAO 113/2013. |