NO990770L - Multi-bµrer transmisjonssystem, mottaker, transceiver og fremgangsmÕte for samme - Google Patents
Multi-bµrer transmisjonssystem, mottaker, transceiver og fremgangsmÕte for sammeInfo
- Publication number
- NO990770L NO990770L NO990770A NO990770A NO990770L NO 990770 L NO990770 L NO 990770L NO 990770 A NO990770 A NO 990770A NO 990770 A NO990770 A NO 990770A NO 990770 L NO990770 L NO 990770L
- Authority
- NO
- Norway
- Prior art keywords
- carrier
- pilot carrier
- receiver
- transmission system
- pilot
- 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
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2657—Carrier synchronisation
-
- 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
- H04L27/2655—Synchronisation arrangements
- H04L27/2668—Details of algorithms
- H04L27/2673—Details of algorithms characterised by synchronisation parameters
- H04L27/2675—Pilot or known symbols
-
- 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
- H04L27/2655—Synchronisation arrangements
- H04L27/2656—Frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe synchronisation
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Seal Device For Vehicle (AREA)
- Radar Systems Or Details Thereof (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
Modem-multibærer transmisjonssystemer, som anvender ortogor.ale borere med høyere ordens QAM-konstellasjoner for overføring av multiple bits per bærer og symbol, stiller store krav til synkroniseringen av mottakeren med senderen. Det maksimale tillatte avvik fra eksakt synkronisering er vanligvis en liten fraksjon av et samplingsintervall. En reservert bærer, pilotbæreren, som er gitt en bestemt fase, anvendes vanligvis som referansen for å oppnå denne høye nøyaktighet. Mottaker-samplingsklokkeoscillatoren er fase- låst til pilotbæreren. Det er derfor nødvendig å estimere fasen av pilotbæreren. Anvendelse av båndpassfilter for å gjenvinne pilotbæreren uavhengig av rammestrukturen av DMT- signalet vil ikke eliminere påvirkningen av nabobærere på pilotbæreren.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9603190A SE506637C2 (sv) | 1996-05-24 | 1996-09-02 | Förbättringar av, eller med avseende på, multibärvågssystem |
PCT/SE1997/001453 WO1998010548A2 (en) | 1996-09-02 | 1997-09-01 | Improvements in, or relating to, multi-carrier transmission systems |
Publications (2)
Publication Number | Publication Date |
---|---|
NO990770D0 NO990770D0 (no) | 1999-02-19 |
NO990770L true NO990770L (no) | 1999-04-29 |
Family
ID=20403748
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO990770A NO990770L (no) | 1996-09-02 | 1999-02-19 | Multi-bµrer transmisjonssystem, mottaker, transceiver og fremgangsmÕte for samme |
Country Status (7)
Country | Link |
---|---|
US (1) | US6493395B1 (no) |
EP (1) | EP0920756B1 (no) |
JP (1) | JP4130994B2 (no) |
AT (1) | ATE233451T1 (no) |
DE (1) | DE69719333T2 (no) |
NO (1) | NO990770L (no) |
WO (1) | WO1998010548A2 (no) |
Families Citing this family (38)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7274652B1 (en) | 2000-06-02 | 2007-09-25 | Conexant, Inc. | Dual packet configuration for wireless communications |
JP3186665B2 (ja) * | 1997-09-19 | 2001-07-11 | 三菱電機株式会社 | 位相推定回路および復調回路 |
GB9901491D0 (en) * | 1999-01-22 | 1999-03-17 | Univ Bristol | Receiver |
JP2000269919A (ja) * | 1999-03-16 | 2000-09-29 | Matsushita Electric Ind Co Ltd | Ofdm通信装置 |
SE521513C2 (sv) * | 1999-06-04 | 2003-11-11 | Ericsson Telefon Ab L M | Förfarande och anordning i ett flertonstransmissionssystem |
US7039139B1 (en) * | 1999-07-21 | 2006-05-02 | Honeywell International Inc. | System for increasing digital data demodulator synchronization timing resolution using training sequence correlation values |
US6633614B1 (en) | 1999-09-15 | 2003-10-14 | Telcordia Technologies, Inc. | Multicarrier personal access communication system |
JP2001103033A (ja) * | 1999-09-30 | 2001-04-13 | Hitachi Denshi Ltd | データ伝送装置 |
US7012982B1 (en) * | 1999-11-24 | 2006-03-14 | Verizon Laboratories Inc. | Method and system for de-jittering of transmitted MPEG-2 and MPEG-4 video |
US7787525B1 (en) * | 1999-12-24 | 2010-08-31 | Schlumberger Technology Corporation | Method and apparatus for transmission of well-bore data on multiple carrier frequencies |
EP1245093B1 (en) | 2000-01-07 | 2006-10-25 | Aware, Inc. | Diagnostic methods and systems for multicarrier modems |
CA2344014A1 (en) * | 2000-04-12 | 2001-10-12 | Yiyan Wu | Method and system for broadcasting a digital data signal within an analog tv signal using orthogonal frequency division multiplexing |
ATE357802T1 (de) | 2000-04-18 | 2007-04-15 | Aware Inc | Datenzuweisung mit änderbaren signal- rauschabstand |
EP1162803A1 (en) * | 2000-06-05 | 2001-12-12 | Telefonaktiebolaget L M Ericsson (Publ) | Frequency tracking device and method for a receiver of a multi-carrier communication system |
EP1162777A1 (en) * | 2000-06-07 | 2001-12-12 | Alcatel | Multi-carrier comunication system with sample rate pilot carrier and time division duplexing frame rate pilot carrier |
US6831975B1 (en) | 2000-09-13 | 2004-12-14 | Texas Instruments Incorporated | Digital subscriber line (DSL) modem compatible with home networks |
WO2002051090A1 (en) * | 2000-12-20 | 2002-06-27 | Nokia Corporation | Method of detecting pilot tones in a noisy signal |
US6914952B2 (en) * | 2001-01-19 | 2005-07-05 | 3Com Corporation | Superframe alignment to a pre-existing ADSL data exchange |
US7020095B2 (en) * | 2001-06-16 | 2006-03-28 | Maxim Integrated Products, Inc. | System and method for modulation of non-data bearing carriers in a multi-carrier modulation system |
US7436881B2 (en) * | 2001-09-28 | 2008-10-14 | Nec Corporation | Per-bin DFE for advanced OQAM-based multi-carrier wireless data transmission systems |
US7116745B2 (en) * | 2002-04-17 | 2006-10-03 | Intellon Corporation | Block oriented digital communication system and method |
EP1543633B1 (en) * | 2002-09-27 | 2006-11-15 | Telefonaktiebolaget LM Ericsson (publ) | Evaluating orthogonal codes transmitted in a wireless communications network |
EP1434414B1 (en) * | 2002-12-27 | 2013-11-20 | Koninklijke KPN N.V. | System for measuring the effect of an ADSL splitter on an ISDN network |
US7042967B2 (en) | 2003-03-03 | 2006-05-09 | Interdigital Technology Corporation | Reduced complexity sliding window based equalizer |
TW200522623A (en) | 2003-03-03 | 2005-07-01 | Interdigital Tech Corp | Reduced complexity sliding window based equalizer |
US7502336B2 (en) * | 2004-06-30 | 2009-03-10 | 2Wire, Inc. | Multi-carrier communication using adaptive tone-pruning |
EP1805927A1 (en) | 2004-10-11 | 2007-07-11 | 2Wire, Inc. | Periodic impulse noise mitigation in a dsl system |
US7953163B2 (en) | 2004-11-30 | 2011-05-31 | Broadcom Corporation | Block linear equalization in a multicarrier communication system |
TWI286015B (en) * | 2005-01-24 | 2007-08-21 | Realtek Semiconductor Corp | Apparatus and method for tracking sampling clock in multi-carrier communication system |
US7489755B2 (en) * | 2005-02-09 | 2009-02-10 | Motorola, Inc. | Method and apparatus for transmission and reception of data |
US7852950B2 (en) | 2005-02-25 | 2010-12-14 | Broadcom Corporation | Methods and apparatuses for canceling correlated noise in a multi-carrier communication system |
US9374257B2 (en) | 2005-03-18 | 2016-06-21 | Broadcom Corporation | Methods and apparatuses of measuring impulse noise parameters in multi-carrier communication systems |
US7813439B2 (en) | 2006-02-06 | 2010-10-12 | Broadcom Corporation | Various methods and apparatuses for impulse noise detection |
US7613104B2 (en) * | 2006-05-31 | 2009-11-03 | Nokia Corporation | Method, apparatus and computer program product providing synchronization for OFDMA downlink signal |
US8139680B2 (en) * | 2007-01-12 | 2012-03-20 | General Dynamics C4 Systems, Inc. | Signal acquisition methods and apparatus in wireless communication systems |
US7907679B2 (en) | 2007-01-12 | 2011-03-15 | General Dynamics C4 Systems, Inc. | Methods and systems for acquiring signals using coherent match filtering |
US8605837B2 (en) | 2008-10-10 | 2013-12-10 | Broadcom Corporation | Adaptive frequency-domain reference noise canceller for multicarrier communications systems |
KR101640595B1 (ko) | 2008-10-20 | 2016-07-18 | 톰슨 라이센싱 | 케이블 전송시스템에서의 사용을 위한 프리앰블 생성 방법 및 장치 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE500986C2 (sv) | 1993-07-20 | 1994-10-17 | Telia Ab | Förfarande och anordning för synkronisering i digitalt transmissionssystem av typen OFDM |
JPH0746218A (ja) * | 1993-07-28 | 1995-02-14 | Sony Corp | ディジタル復調装置 |
JP3074103B2 (ja) * | 1993-11-16 | 2000-08-07 | 株式会社東芝 | Ofdm同期復調回路 |
US5627863A (en) * | 1994-07-15 | 1997-05-06 | Amati Communications Corporation | Frame synchronization in multicarrier transmission systems |
ATE235765T1 (de) * | 1996-09-02 | 2003-04-15 | St Microelectronics Nv | Verbesserungen bei, oder in bezug auf mehrträgerübertragungssysteme |
-
1997
- 1997-09-01 DE DE69719333T patent/DE69719333T2/de not_active Expired - Lifetime
- 1997-09-01 WO PCT/SE1997/001453 patent/WO1998010548A2/en active IP Right Grant
- 1997-09-01 JP JP51255598A patent/JP4130994B2/ja not_active Expired - Lifetime
- 1997-09-01 AT AT97937935T patent/ATE233451T1/de not_active IP Right Cessation
- 1997-09-01 US US09/147,758 patent/US6493395B1/en not_active Expired - Lifetime
- 1997-09-01 EP EP97937935A patent/EP0920756B1/en not_active Expired - Lifetime
-
1999
- 1999-02-19 NO NO990770A patent/NO990770L/no not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
DE69719333T2 (de) | 2003-12-04 |
WO1998010548A3 (en) | 1998-06-04 |
EP0920756A2 (en) | 1999-06-09 |
NO990770D0 (no) | 1999-02-19 |
US6493395B1 (en) | 2002-12-10 |
WO1998010548A2 (en) | 1998-03-12 |
JP4130994B2 (ja) | 2008-08-13 |
ATE233451T1 (de) | 2003-03-15 |
DE69719333D1 (de) | 2003-04-03 |
JP2000517507A (ja) | 2000-12-26 |
EP0920756B1 (en) | 2003-02-26 |
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Legal Events
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FC2A | Withdrawal, rejection or dismissal of laid open patent application |