DE3382669T2 - Verfahren zum Vermindern der Konvergenzzeit eines Echokompensators. - Google Patents
Verfahren zum Vermindern der Konvergenzzeit eines Echokompensators.Info
- Publication number
- DE3382669T2 DE3382669T2 DE86202106T DE3382669T DE3382669T2 DE 3382669 T2 DE3382669 T2 DE 3382669T2 DE 86202106 T DE86202106 T DE 86202106T DE 3382669 T DE3382669 T DE 3382669T DE 3382669 T2 DE3382669 T2 DE 3382669T2
- Authority
- DE
- Germany
- Prior art keywords
- signal
- coefficients
- phase
- transversal filter
- echo
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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- 238000005311 autocorrelation function Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 238000002592 echocardiography Methods 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
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- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
- H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
- H04B3/238—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers using initial training sequence
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
- H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
- H04B3/232—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers using phase shift, phase roll or frequency offset correction
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Filters That Use Time-Delay Elements (AREA)
- Bidirectional Digital Transmission (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8210310A FR2528643A1 (fr) | 1982-06-14 | 1982-06-14 | Procede destine a reduire le temps de convergence d'un annuleur d'echo et dispositif utilise pour mettre en oeuvre ce procede |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3382669D1 DE3382669D1 (de) | 1993-04-29 |
| DE3382669T2 true DE3382669T2 (de) | 1993-09-30 |
Family
ID=9274960
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE86202106T Expired - Fee Related DE3382669T2 (de) | 1982-06-14 | 1983-06-09 | Verfahren zum Vermindern der Konvergenzzeit eines Echokompensators. |
| DE8383200837T Expired DE3379766D1 (en) | 1982-06-14 | 1983-06-09 | Method of reducing the convergence time of an echo canceller, and apparatus for carrying out this method |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE8383200837T Expired DE3379766D1 (en) | 1982-06-14 | 1983-06-09 | Method of reducing the convergence time of an echo canceller, and apparatus for carrying out this method |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4621173A (enExample) |
| EP (1) | EP0096936B1 (enExample) |
| JP (2) | JPH0714137B2 (enExample) |
| AU (1) | AU570635B2 (enExample) |
| CA (1) | CA1194165A (enExample) |
| DE (2) | DE3382669T2 (enExample) |
| FR (1) | FR2528643A1 (enExample) |
Families Citing this family (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2528643A1 (fr) * | 1982-06-14 | 1983-12-16 | Trt Telecom Radio Electr | Procede destine a reduire le temps de convergence d'un annuleur d'echo et dispositif utilise pour mettre en oeuvre ce procede |
| FR2541837A1 (fr) * | 1983-02-25 | 1984-08-31 | Trt Telecom Radio Electr | Procede de reduction du temps de convergence d'un annuleur d'echo et dispositif pour mettre en oeuvre ce procede |
| EP0130263B1 (fr) * | 1983-06-30 | 1988-06-01 | International Business Machines Corporation | Procédé d'initialisation d'un filtre annuleur d'écho et système de communication utilisant ledit procédé |
| EP0167677B1 (en) * | 1984-07-13 | 1989-03-08 | BELL TELEPHONE MANUFACTURING COMPANY Naamloze Vennootschap | Signal processing arrangement |
| NZ214905A (en) * | 1985-01-29 | 1988-09-29 | British Telecomm | Noise cancellation by adaptive filter compensates for timing variations |
| EP0239293A3 (en) * | 1986-03-24 | 1988-12-14 | Gpt Limited | Data transmission systems |
| US4742510A (en) * | 1986-04-04 | 1988-05-03 | Massachusetts Institute Of Technology | Near and far echo canceller for data communications |
| AU606176B2 (en) * | 1987-07-13 | 1991-01-31 | Alcatel Australia Limited | Programmable balance filter arrangement |
| CA1338218C (en) * | 1988-03-17 | 1996-04-02 | Yoshinori Tanaka | Echo canceller |
| CA1315356C (en) * | 1988-07-20 | 1993-03-30 | Seiji Miyoshi | Digital adaptive filter and method of convergence therein |
| US4987569A (en) * | 1989-04-05 | 1991-01-22 | Codex Corporation | Fast training echo canceller |
| JP2785336B2 (ja) * | 1989-06-13 | 1998-08-13 | 日本電気株式会社 | 音響エコーキャンセラのトレーニング方式 |
| FR2710210A1 (fr) * | 1993-09-13 | 1995-03-24 | Trt Telecom Radio Electr | Procédé pour la mise en route d'un modem comportant un annuleur d'écho à phase variable et modem dans lequel un tel procédé est mis en Óoeuvre. |
| US5859907A (en) * | 1994-05-06 | 1999-01-12 | Ntt Mobile Communications Network, Inc. | Echo canceler and echo path estimating method |
| EP0708536B8 (en) * | 1994-05-07 | 2006-09-13 | Ntt Mobile Communications Network Inc. | Echo canceler and its learning method |
| JP2778513B2 (ja) * | 1995-04-14 | 1998-07-23 | 日本電気株式会社 | エコーキャンセラ装置 |
| US5909426A (en) * | 1997-03-31 | 1999-06-01 | Rockwell Science Center, Inc. | Orthogonal LMS algorithms for fast line echo canceler training |
| JP2002519767A (ja) * | 1998-06-20 | 2002-07-02 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 入力データ信号を評価する方法および当該方法を実施する回路配置 |
| US6560332B1 (en) * | 1999-05-18 | 2003-05-06 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and apparatus for improving echo suppression in bi-directional communications systems |
| US7062039B1 (en) * | 1999-05-27 | 2006-06-13 | Telefonaktiebolaget Lm Ericsson | Methods and apparatus for improving adaptive filter performance by inclusion of inaudible information |
| US7068764B1 (en) * | 2000-03-29 | 2006-06-27 | Surf Communication Solutions Ltd. | V.90 over all-digital connections |
| US7548599B2 (en) * | 2003-01-28 | 2009-06-16 | Agere Systems Inc. | Method and apparatus for reducing cross-talk with reduced redundancies |
| FI20030777A0 (fi) * | 2003-05-22 | 2003-05-22 | Nokia Corp | Lähetysdiversiteetin kertaluvun ja lähetyshaarojen määritys |
| JP4591102B2 (ja) * | 2005-02-04 | 2010-12-01 | パナソニック株式会社 | エコーキャンセラおよびそれを用いたハンズフリー電話とエコーキャンセル方法 |
| WO2007003233A1 (en) * | 2005-07-04 | 2007-01-11 | Freescale Semiconductor, Inc | Ramping in multimode transmitters using primed fir filters |
| DE202006021313U1 (de) | 2005-11-28 | 2015-10-15 | Evolved Wireless Llc (N. D. Gesetzen D. Staates Delaware) | Vorrichtung zur Übertragung und Vorrichtung zum Empfang einer Codesequenz in einem drahtlosen Kommunikationssystem |
| US8126161B2 (en) * | 2006-11-02 | 2012-02-28 | Hitachi, Ltd. | Acoustic echo canceller system |
| JP5658127B2 (ja) * | 2011-11-18 | 2015-01-21 | 日本電信電話株式会社 | 無線通信装置、無線通信方法及び無線通信プログラム |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1108415A (en) * | 1966-05-06 | 1968-04-03 | Int Standard Electric Corp | Echo suppression in long distance telephone circuits |
| US4047013A (en) * | 1975-07-09 | 1977-09-06 | International Business Machines Corporation | Method and apparatus for fast determination of initial transversal equalizer coefficient values |
| GB2008903B (en) * | 1977-08-17 | 1982-06-30 | Gen Electric Co Ltd | Amplifier arrangements |
| IT1115559B (it) * | 1978-08-29 | 1986-02-03 | Cselt Centro Studi Lab Telecom | Procedimento e dispositivo per la cancellazione numerica dell eco |
| NL7902053A (nl) * | 1979-03-15 | 1980-09-17 | Philips Nv | Echocompensator voor homochrone data overdrachtssyste- men. |
| FR2460075B1 (fr) * | 1979-06-22 | 1988-12-09 | Cit Alcatel | Annuleur d'echo adaptatif pour transmission de donnees en duplex |
| FR2479617A1 (fr) * | 1980-03-26 | 1981-10-02 | Trt Telecom Radio Electr | Annuleur d'echo pour signal d'echo a phase variable |
| FR2487144B1 (fr) * | 1980-07-21 | 1986-10-24 | Trt Telecom Radio Electr | Dispositif d'annulation d'un signal d'echo composite |
| US4430743A (en) * | 1980-11-17 | 1984-02-07 | Nippon Electric Co., Ltd. | Fast start-up system for transversal equalizers |
| FR2528643A1 (fr) * | 1982-06-14 | 1983-12-16 | Trt Telecom Radio Electr | Procede destine a reduire le temps de convergence d'un annuleur d'echo et dispositif utilise pour mettre en oeuvre ce procede |
| US4621123A (en) * | 1984-12-20 | 1986-11-04 | Sumitomo Chemical Company, Limited | Phosphinylmethyl polypenols and polyglycidyl ethers thereof |
-
1982
- 1982-06-14 FR FR8210310A patent/FR2528643A1/fr active Granted
-
1983
- 1983-06-09 EP EP83200837A patent/EP0096936B1/fr not_active Expired
- 1983-06-09 DE DE86202106T patent/DE3382669T2/de not_active Expired - Fee Related
- 1983-06-09 DE DE8383200837T patent/DE3379766D1/de not_active Expired
- 1983-06-14 JP JP58106588A patent/JPH0714137B2/ja not_active Expired - Lifetime
- 1983-06-14 AU AU15741/83A patent/AU570635B2/en not_active Ceased
- 1983-06-14 CA CA000430321A patent/CA1194165A/en not_active Expired
- 1983-06-14 US US06/504,200 patent/US4621173A/en not_active Expired - Fee Related
-
1993
- 1993-05-10 JP JP5108506A patent/JP2538173B2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA1194165A (en) | 1985-09-24 |
| EP0096936B1 (fr) | 1989-04-26 |
| EP0096936A1 (fr) | 1983-12-28 |
| DE3379766D1 (en) | 1989-06-01 |
| US4621173A (en) | 1986-11-04 |
| FR2528643B1 (enExample) | 1984-11-23 |
| FR2528643A1 (fr) | 1983-12-16 |
| JPS594337A (ja) | 1984-01-11 |
| JPH0714137B2 (ja) | 1995-02-15 |
| JPH0653864A (ja) | 1994-02-25 |
| JP2538173B2 (ja) | 1996-09-25 |
| AU1574183A (en) | 1983-12-22 |
| AU570635B2 (en) | 1988-03-24 |
| DE3382669D1 (de) | 1993-04-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8364 | No opposition during term of opposition | ||
| 8327 | Change in the person/name/address of the patent owner |
Owner name: COMPAGNIE DES SIGNAUX, PARIS, FR |
|
| 8328 | Change in the person/name/address of the agent |
Free format text: GRUENECKER, KINKELDEY, STOCKMAIR & SCHWANHAEUSSER, ANWALTSSOZIETAET, 80538 MUENCHEN |
|
| 8339 | Ceased/non-payment of the annual fee |