WO1998047239A1 - Sondage a ponderation temporelle d'un canal de transmission - Google Patents
Sondage a ponderation temporelle d'un canal de transmission Download PDFInfo
- Publication number
- WO1998047239A1 WO1998047239A1 PCT/FR1998/000734 FR9800734W WO9847239A1 WO 1998047239 A1 WO1998047239 A1 WO 1998047239A1 FR 9800734 W FR9800734 W FR 9800734W WO 9847239 A1 WO9847239 A1 WO 9847239A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- matrix
- channel
- estimate
- impulse response
- estimation
- Prior art date
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
- 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
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/76—Pilot transmitters or receivers for control of transmission or for equalising
-
- 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
Definitions
- the present invention relates to a method for probing a transmission channel.
- the invention proposes a method for estimating the impulse response of a transmission channel.
- the received signal generally comes from a large number of reflections in the channel, the different paths taken by the transmitted signal thus leading to various delays at the level of the receiver.
- the impulse response of the channel represents all of these fluctuations, to which the transmitted signal is subjected. This is therefore the fundamental characteristic representing the transmissions between the transmitter and the receiver.
- the present invention thus relates to a method of probing a transmission channel which has better resistance to additive noise or, in other words, which leads to a reduced error compared to the estimation error of known techniques.
- the estimation of the covariance taking the form of a matrix R, by noting A to the measurement matrix associated with the learning sequence, the establishment of the weighted estimate is thus carried out:
- the next step consists in estimating the instantaneous impulse response X established according to any of the known techniques from the received signal corresponding to the last training sequence received.
- X WX '
- this last estimate is weighted by the following method to obtain an Xp weighting of the instantaneous impulse response:
- the weighted estimate Xp is established directly as follows:
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Filters That Use Time-Delay Elements (AREA)
- Small-Scale Networks (AREA)
- Noise Elimination (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR9808543-3A BR9808543A (pt) | 1997-04-14 | 1998-04-10 | Sondagem com ponderação temporal de um canal de transmissão |
US09/402,956 US6671313B1 (en) | 1997-04-14 | 1998-04-10 | Time-weighted transmission channel estimation |
EP98920611A EP0985280A1 (fr) | 1997-04-14 | 1998-04-10 | Sondage a ponderation temporelle d'un canal de transmission |
CA002286556A CA2286556A1 (fr) | 1997-04-14 | 1998-04-10 | Sondage a ponderation temporelle d'un canal de transmission |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR97/04933 | 1997-04-14 | ||
FR9704933A FR2762164B1 (fr) | 1997-04-14 | 1997-04-14 | Sondage a ponderation temporelle d'un canal de transmission |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998047239A1 true WO1998047239A1 (fr) | 1998-10-22 |
Family
ID=9506161
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1998/000734 WO1998047239A1 (fr) | 1997-04-14 | 1998-04-10 | Sondage a ponderation temporelle d'un canal de transmission |
Country Status (7)
Country | Link |
---|---|
US (1) | US6671313B1 (fr) |
EP (1) | EP0985280A1 (fr) |
CN (1) | CN1256814A (fr) |
BR (1) | BR9808543A (fr) |
CA (1) | CA2286556A1 (fr) |
FR (1) | FR2762164B1 (fr) |
WO (1) | WO1998047239A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2821502A1 (fr) * | 2001-02-27 | 2002-08-30 | Thomson Csf | Procede et dispositif d'estimation d'un canal de propagation a partir de ses statistiques |
US7058147B2 (en) * | 2001-02-28 | 2006-06-06 | At&T Corp. | Efficient reduced complexity windowed optimal time domain equalizer for discrete multitone-based DSL modems |
KR100615889B1 (ko) * | 2001-12-29 | 2006-08-25 | 삼성전자주식회사 | 송/수신 다중 안테나를 포함하는 이동 통신 장치 및 방법 |
US7065371B1 (en) * | 2003-02-20 | 2006-06-20 | Comsys Communication & Signal Processing Ltd. | Channel order selection and channel estimation in wireless communication system |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0564849A1 (fr) * | 1992-04-10 | 1993-10-13 | International Business Machines Corporation | Système et procédé d'estimation robuste de séquence en présence de conditions de désadaptation du canal |
EP0665665A1 (fr) * | 1994-01-21 | 1995-08-02 | Thomson-Csf | Procédé et dispositif permettant à un modem de se synchroniser sur un transmetteur de données numériques par voie hertzienne en présence de brouilleurs |
EP0682420A1 (fr) * | 1994-05-11 | 1995-11-15 | Alcatel Mobile Communication France | Dispositif d'estimation de la qualité d'un canal de transmission dans un récepteur numérique |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5263026A (en) * | 1991-06-27 | 1993-11-16 | Hughes Aircraft Company | Maximum likelihood sequence estimation based equalization within a mobile digital cellular receiver |
FR2696604B1 (fr) * | 1992-10-07 | 1994-11-04 | Alcatel Radiotelephone | Dispositif d'estimation d'un canal de transmission. |
FR2708162B1 (fr) * | 1993-07-20 | 1995-09-01 | Alcatel Mobile Comm France | Procédé pour déterminer la longueur optimale d'un bloc de données dans un système de communication à accès multiple à répartition dans le temps (AMRT). |
FR2718306B1 (fr) * | 1994-03-31 | 1996-04-26 | Alcatel Mobile Comm France | Procédé d'adaptation de l'interface air, dans un système de radiocommunication vers des mobiles. |
US5513221A (en) * | 1994-05-19 | 1996-04-30 | Hughes Aircraft Company | Doppler bandwidth dependent estimation of a communications channel |
US6101399A (en) * | 1995-02-22 | 2000-08-08 | The Board Of Trustees Of The Leland Stanford Jr. University | Adaptive beam forming for transmitter operation in a wireless communication system |
-
1997
- 1997-04-14 FR FR9704933A patent/FR2762164B1/fr not_active Expired - Fee Related
-
1998
- 1998-04-10 US US09/402,956 patent/US6671313B1/en not_active Expired - Lifetime
- 1998-04-10 CN CN98805137.0A patent/CN1256814A/zh active Pending
- 1998-04-10 CA CA002286556A patent/CA2286556A1/fr not_active Abandoned
- 1998-04-10 EP EP98920611A patent/EP0985280A1/fr not_active Withdrawn
- 1998-04-10 BR BR9808543-3A patent/BR9808543A/pt not_active IP Right Cessation
- 1998-04-10 WO PCT/FR1998/000734 patent/WO1998047239A1/fr not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0564849A1 (fr) * | 1992-04-10 | 1993-10-13 | International Business Machines Corporation | Système et procédé d'estimation robuste de séquence en présence de conditions de désadaptation du canal |
EP0665665A1 (fr) * | 1994-01-21 | 1995-08-02 | Thomson-Csf | Procédé et dispositif permettant à un modem de se synchroniser sur un transmetteur de données numériques par voie hertzienne en présence de brouilleurs |
EP0682420A1 (fr) * | 1994-05-11 | 1995-11-15 | Alcatel Mobile Communication France | Dispositif d'estimation de la qualité d'un canal de transmission dans un récepteur numérique |
Also Published As
Publication number | Publication date |
---|---|
BR9808543A (pt) | 2001-06-19 |
CA2286556A1 (fr) | 1998-10-22 |
CN1256814A (zh) | 2000-06-14 |
US6671313B1 (en) | 2003-12-30 |
EP0985280A1 (fr) | 2000-03-15 |
FR2762164B1 (fr) | 1999-09-24 |
FR2762164A1 (fr) | 1998-10-16 |
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