BR0002917A - Método de modulação para transmissor - Google Patents
Método de modulação para transmissorInfo
- Publication number
- BR0002917A BR0002917A BR0002917-3A BR0002917A BR0002917A BR 0002917 A BR0002917 A BR 0002917A BR 0002917 A BR0002917 A BR 0002917A BR 0002917 A BR0002917 A BR 0002917A
- Authority
- BR
- Brazil
- Prior art keywords
- time slot
- constellation mapping
- different
- time interval
- time
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
- H04L27/04—Modulator circuits; Transmitter circuits
-
- 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
-
- 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
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
<B>MéTODO DE MODULAçãO PARA TRANSMISSOR<D> Em um sistema de comunicação sem fio, o esquema de mapeamento da constelação aplicado pode ser mudado para uma base por intervalo de tempo, isto é, de intervalo de tempo a intervalo de tempo, de forma que a constelação usada para codificar os símbolos de cada intervalo de tempo possa ser diferente para cada intervalo de tempo dentro de um quadro único, e possa ser diferente para um intervalo de tempo particular em diferentes quadros consecutivos. Em outras palavras, muitos esquemas de mapeamento em constelação estão disponíveis, cada um fornecendo a habilidade de transmitir um número diferente de bits por símbolo, e o esquema de mapeamento em constelação particular aplicado por qualquer intervalo de tempo precisa ser selecionado por aquele intervalo de tempo somente. A habilidade para usar qualquer esquema de mapeamento em constelação particular depende da qualidade do canal vigente. O mapeamento em constelação particular usado pelos dados do usuário do intervalo de tempo pode ser indicado no preâmbulo do intervalo de tempo. Para esse fim, cada intervalo de tempo pode ter seu próprio preâmbulo, mapeado com um esquema de mapeamento em constelação que a) é conhecido a priori, b) pode ser o mesmo para todos os intervalos de tempo e c) pode ser diferente do esquema de mapeamento em constelação usado para codificar os dados do usuário no intervalo. Um receptor pode determinar o mapeamento em constelação usado por cada intervalo de tempo a partir, exclusivamente, do preâmbulo de intervalo de tempo.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/361,430 US6490270B1 (en) | 1999-07-27 | 1999-07-27 | Modulation method for transmitter |
Publications (1)
Publication Number | Publication Date |
---|---|
BR0002917A true BR0002917A (pt) | 2001-04-03 |
Family
ID=23422030
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR0002917-3A BR0002917A (pt) | 1999-07-27 | 2000-07-17 | Método de modulação para transmissor |
Country Status (9)
Country | Link |
---|---|
US (1) | US6490270B1 (pt) |
EP (1) | EP1073302B1 (pt) |
JP (1) | JP2001069189A (pt) |
KR (1) | KR100738823B1 (pt) |
CN (1) | CN100452660C (pt) |
AU (1) | AU4876600A (pt) |
BR (1) | BR0002917A (pt) |
CA (1) | CA2313817C (pt) |
DE (1) | DE60014798T2 (pt) |
Families Citing this family (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6782037B1 (en) * | 1999-07-27 | 2004-08-24 | Lucent Technologies Inc. | Demodulation method for receiver |
EP2259529B1 (en) * | 1999-07-28 | 2019-03-27 | Panasonic Intellectual Property Corporation of America | Apparatus for the transmission and reception of data and method for digital radio communication |
US7215650B1 (en) | 1999-08-16 | 2007-05-08 | Viasat, Inc. | Adaptive data rate control for narrowcast networks |
US7110923B2 (en) * | 1999-11-04 | 2006-09-19 | Verticalband, Limited | Fast, blind equalization techniques using reliable symbols |
US7085691B2 (en) * | 1999-11-04 | 2006-08-01 | Verticalband, Limited | Reliable symbols as a means of improving the performance of information transmission systems |
US7143013B2 (en) * | 1999-11-04 | 2006-11-28 | Verticalband, Limited | Reliable symbols as a means of improving the performance of information transmission systems |
US6700926B1 (en) | 1999-12-10 | 2004-03-02 | Nokia Corporation | Method and apparatus providing bit-to-symbol mapping for space-time codes |
EP1303924A2 (en) * | 2000-02-29 | 2003-04-23 | Inari, Inc. | High data-rate powerline network system and method |
US7016296B2 (en) | 2000-10-16 | 2006-03-21 | Broadcom Corporation | Adaptive modulation for fixed wireless link in cable transmission system |
US6853681B1 (en) | 2000-11-28 | 2005-02-08 | Telefonaktiebolaget L M Ericsson (Publ) | Using different channel models for different training sequences |
JP3811002B2 (ja) * | 2000-12-13 | 2006-08-16 | 三菱電機株式会社 | 受信装置 |
US20020136331A1 (en) * | 2001-01-24 | 2002-09-26 | Leif Wilhelmsson | Method and apparatus for performing channel estimation with a limiting receiver |
US6912249B2 (en) * | 2001-03-15 | 2005-06-28 | Telefonaktiebolaget L M Ericsson (Publ) | Method and system for training a radio receiver |
FI20010963A0 (fi) | 2001-05-08 | 2001-05-08 | Nokia Corp | Adaptiivinen symbolikuvaus matkaviestinjärjestelmässä |
US20030123415A1 (en) * | 2001-12-31 | 2003-07-03 | Bysted Tommy Kristensen | Transport format combination indicator signalling |
US6999439B2 (en) * | 2002-01-31 | 2006-02-14 | Mitsubishi Denki Kabushiki Kaisha | Information transmission method, mobile communications system, base station and mobile station in which data size of identification data is reduced |
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 |
US7116944B2 (en) * | 2002-02-07 | 2006-10-03 | Lucent Technologies Inc. | Method and apparatus for feedback error detection in a wireless communications systems |
US7567501B2 (en) * | 2002-07-03 | 2009-07-28 | Telefonaktiebolaget L M Ericsson (Publ) | Embedded keying |
JP4353774B2 (ja) * | 2002-12-04 | 2009-10-28 | パナソニック株式会社 | データ送信方法とデータ受信方法およびそれらを用いた送信装置と受信装置 |
CN100380831C (zh) * | 2003-09-23 | 2008-04-09 | 四川大学 | 用于信息安全传输的数字调制解调方法 |
TWI271071B (en) * | 2003-11-06 | 2007-01-11 | Ind Tech Res Inst | Communication method of scalable QAM and scalable QAM system |
US7301958B2 (en) * | 2003-11-26 | 2007-11-27 | Intel Corporation | Cycle-efficient TDM timeslot remapping for network processing engines |
US8014264B2 (en) | 2004-05-01 | 2011-09-06 | Neocific, Inc. | Methods and apparatus for communication with time-division duplexing |
WO2006004968A2 (en) | 2004-06-30 | 2006-01-12 | Neocific, Inc. | Methods and apparatus for power control in multi-carrier wireless systems |
KR101015708B1 (ko) * | 2004-09-14 | 2011-02-24 | 삼성전자주식회사 | 다중반송파 시스템을 위한 적응적 비트/전력 로딩 기법 |
JP4554451B2 (ja) * | 2005-06-29 | 2010-09-29 | 京セラ株式会社 | 通信装置、通信システム、変調方法、及びプログラム |
US7948944B2 (en) * | 2005-09-28 | 2011-05-24 | Neocific, Inc. | Method and system for multi-carrier packet communication with reduced overhead |
US8693430B2 (en) | 2005-09-28 | 2014-04-08 | Neocific, Inc. | Method and system for multi-carrier packet communication with reduced overhead |
US7839948B2 (en) * | 2005-12-02 | 2010-11-23 | Qualcomm Incorporated | Time slicing techniques for variable data rate encoding |
CN101594628B (zh) * | 2008-05-27 | 2011-03-16 | 普天信息技术研究院有限公司 | 一种上行发送功率可变***中的信道质量估计方法 |
US8588086B2 (en) * | 2009-11-30 | 2013-11-19 | Qualcomm Incorporated | Reverse link data rate indication for satellite-enabled communications systems |
EP2992621A1 (en) * | 2013-05-03 | 2016-03-09 | Marvell World Trade Ltd. | Beam change and smoothing recommendation in mixed mode wlan systems |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4701294A (en) * | 1986-01-13 | 1987-10-20 | Kimberly-Clark Corporation | Eductor airforming apparatus |
US5369637A (en) * | 1991-04-03 | 1994-11-29 | U.S. Philips Corporation | Signal transmission system |
AU656972B2 (en) * | 1991-06-03 | 1995-02-23 | British Telecommunications Public Limited Company | QAM system in which the constellation is modified in accordance with channel quality |
US5335356A (en) * | 1991-09-05 | 1994-08-02 | Telefonaktiebolaget L M Ericsson | Adaptive resource allocation in a mobile telephone system |
US6334219B1 (en) * | 1994-09-26 | 2001-12-25 | Adc Telecommunications Inc. | Channel selection for a hybrid fiber coax network |
US5533004A (en) * | 1994-11-07 | 1996-07-02 | Motorola, Inc. | Method for providing and selecting amongst multiple data rates in a time division multiplexed system |
US5701294A (en) * | 1995-10-02 | 1997-12-23 | Telefonaktiebolaget Lm Ericsson | System and method for flexible coding, modulation, and time slot allocation in a radio telecommunications network |
US6320856B1 (en) * | 1996-05-23 | 2001-11-20 | Alcatel Usa, Inc. | System and method for a multi-host subscriber loop |
CA2268981C (en) * | 1996-10-09 | 2004-04-13 | Alcatel Usa Sourcing, L.P. | Call management in a wireless telecommunications system |
US5909469A (en) * | 1997-08-29 | 1999-06-01 | Telefonaktoebolaget Lm Ericsson | Link adaptation method for links using modulation schemes that have different symbol rates |
-
1999
- 1999-07-27 US US09/361,430 patent/US6490270B1/en not_active Expired - Lifetime
-
2000
- 2000-07-12 CA CA002313817A patent/CA2313817C/en not_active Expired - Fee Related
- 2000-07-17 DE DE60014798T patent/DE60014798T2/de not_active Expired - Lifetime
- 2000-07-17 BR BR0002917-3A patent/BR0002917A/pt not_active Application Discontinuation
- 2000-07-17 EP EP00306063A patent/EP1073302B1/en not_active Expired - Lifetime
- 2000-07-21 AU AU48766/00A patent/AU4876600A/en not_active Abandoned
- 2000-07-25 CN CNB001217054A patent/CN100452660C/zh not_active Expired - Fee Related
- 2000-07-26 JP JP2000224834A patent/JP2001069189A/ja active Pending
- 2000-07-27 KR KR1020000043300A patent/KR100738823B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
US6490270B1 (en) | 2002-12-03 |
CA2313817C (en) | 2005-02-15 |
CN1283004A (zh) | 2001-02-07 |
EP1073302B1 (en) | 2004-10-13 |
JP2001069189A (ja) | 2001-03-16 |
EP1073302A1 (en) | 2001-01-31 |
KR100738823B1 (ko) | 2007-07-13 |
CN100452660C (zh) | 2009-01-14 |
KR20010039761A (ko) | 2001-05-15 |
AU4876600A (en) | 2001-02-01 |
DE60014798D1 (de) | 2004-11-18 |
DE60014798T2 (de) | 2005-06-09 |
CA2313817A1 (en) | 2001-01-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FA10 | Dismissal: dismissal - article 33 of industrial property law | ||
B11Y | Definitive dismissal - extension of time limit for request of examination expired [chapter 11.1.1 patent gazette] |