NL8204483A - Echo-onderdrukker. - Google Patents
Echo-onderdrukker. Download PDFInfo
- Publication number
- NL8204483A NL8204483A NL8204483A NL8204483A NL8204483A NL 8204483 A NL8204483 A NL 8204483A NL 8204483 A NL8204483 A NL 8204483A NL 8204483 A NL8204483 A NL 8204483A NL 8204483 A NL8204483 A NL 8204483A
- Authority
- NL
- Netherlands
- Prior art keywords
- circuit
- signal
- output
- output signal
- input
- Prior art date
Links
- 238000005070 sampling Methods 0.000 claims description 73
- 230000004044 response Effects 0.000 claims description 33
- 230000005540 biological transmission Effects 0.000 claims description 31
- 230000003044 adaptive effect Effects 0.000 claims description 13
- 230000006870 function Effects 0.000 claims description 11
- 238000009795 derivation Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 230000001052 transient effect Effects 0.000 claims description 3
- 229910002056 binary alloy Inorganic materials 0.000 claims description 2
- 230000003111 delayed effect Effects 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 230000002441 reversible effect Effects 0.000 claims description 2
- 230000001934 delay Effects 0.000 claims 5
- 238000007493 shaping process Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 17
- 230000001419 dependent effect Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 10
- 230000008859 change Effects 0.000 description 8
- 230000003247 decreasing effect Effects 0.000 description 5
- 230000010354 integration Effects 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000012935 Averaging Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000011437 continuous method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
- H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
- H04L25/03057—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a recursive structure
-
- 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
- H04B3/235—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 combined with adaptive equaliser
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Filters That Use Time-Delay Elements (AREA)
- Networks Using Active Elements (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8134898 | 1981-11-19 | ||
| GB08134898A GB2111354B (en) | 1981-11-19 | 1981-11-19 | Echo canceller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL8204483A true NL8204483A (nl) | 1983-06-16 |
Family
ID=10526000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL8204483A NL8204483A (nl) | 1981-11-19 | 1982-11-19 | Echo-onderdrukker. |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US4539675A (no) |
| EP (1) | EP0096048B1 (no) |
| BE (1) | BE895066R (no) |
| CA (1) | CA1210471A (no) |
| DE (2) | DE3242577A1 (no) |
| ES (1) | ES517479A0 (no) |
| FI (1) | FI74560C (no) |
| GB (1) | GB2111354B (no) |
| NL (1) | NL8204483A (no) |
| NO (1) | NO161098C (no) |
| SE (1) | SE8206608D0 (no) |
| WO (1) | WO1983001876A1 (no) |
Families Citing this family (42)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3327467A1 (de) * | 1983-07-29 | 1985-02-14 | Siemens AG, 1000 Berlin und 8000 München | Verfahren und schaltungsanordnung zur kompensation von echosignalen |
| EP0139814A3 (de) * | 1983-09-30 | 1986-07-30 | Siemens-Albis Aktiengesellschaft | Aktive Entzerrerschaltung |
| IT1178913B (it) * | 1984-03-26 | 1987-09-16 | Cselt Centro Studi Lab Telecom | Sistema per la trassmissione bidire zionale con cancellazione d eco |
| EP0156315B1 (de) * | 1984-03-30 | 1991-06-05 | Siemens Aktiengesellschaft | Schaltungsanordnung zum Prüfen der Funktionsfähigkeit einer Datenübertragunseinrichtung |
| EP0167677B1 (en) * | 1984-07-13 | 1989-03-08 | BELL TELEPHONE MANUFACTURING COMPANY Naamloze Vennootschap | Signal processing arrangement |
| US4650930A (en) * | 1985-02-13 | 1987-03-17 | Northern Telecom Limited | Adaptive equalizer |
| SE447777B (sv) * | 1985-04-22 | 1986-12-08 | Ellemtel Utvecklings Ab | Forfarande for instellning av ett digitalt utjemnarfilter vid samtidig adaptiv ekoeliminering och adaptiv eliminering av storningar som uppstar genom intersymbolinterferens, samt anordning for genomforande av forfarande |
| GB2182826B (en) * | 1985-11-20 | 1990-08-01 | Stc Plc | Data transmission system |
| GB2183971B (en) * | 1985-12-05 | 1989-10-04 | Stc Plc | Data transmission system |
| EP0239293A3 (en) * | 1986-03-24 | 1988-12-14 | Gpt Limited | Data transmission systems |
| US4809203A (en) * | 1986-08-25 | 1989-02-28 | Ford Aerospace & Communications Corporation | Hybrid analog-digital filter |
| NL8603247A (nl) * | 1986-12-22 | 1988-07-18 | At & T & Philips Telecomm | Adaptief tijd-discreet filter voor het vormen van een compensatiesignaal uit synchrone datasymbolen. |
| FR2614484B1 (fr) * | 1986-12-30 | 1994-04-08 | Telecommunications Sa | Terminal de transmission de donnees sur une voie analogique bidirectionnelle avec annulation d'echo couplee au rythme reception |
| US4989221A (en) * | 1987-03-30 | 1991-01-29 | Codex Corporation | Sample rate converter |
| US4982428A (en) * | 1988-12-29 | 1991-01-01 | At&T Bell Laboratories | Arrangement for canceling interference in transmission systems |
| US5125024A (en) * | 1990-03-28 | 1992-06-23 | At&T Bell Laboratories | Voice response unit |
| US5263019A (en) * | 1991-01-04 | 1993-11-16 | Picturetel Corporation | Method and apparatus for estimating the level of acoustic feedback between a loudspeaker and microphone |
| FR2710211A1 (fr) * | 1993-09-13 | 1995-03-24 | Trt Telecom Radio Electr | Dispositif de détection de rupture de ligne et modem comportant un tel dispositif. |
| US5471527A (en) | 1993-12-02 | 1995-11-28 | Dsc Communications Corporation | Voice enhancement system and method |
| US5627885A (en) * | 1994-02-14 | 1997-05-06 | Brooktree Corporation | System for, and method of, transmitting and receiving through telephone lines signals representing data |
| US5887059A (en) * | 1996-01-30 | 1999-03-23 | Advanced Micro Devices, Inc. | System and method for performing echo cancellation in a communications network employing a mixed mode LMS adaptive balance filter |
| US5889827A (en) | 1996-12-12 | 1999-03-30 | Ericsson Inc. | Method and apparatus for digital symbol detection using medium response estimates |
| US6597732B1 (en) * | 1999-01-14 | 2003-07-22 | Eric Morgan Dowling | High-speed modem with uplink remote-echo canceller |
| US6487243B1 (en) | 1999-03-08 | 2002-11-26 | International Business Machines Corporation | Modems, methods, and computer program products for recovering from errors in a tone reversal sequence between two modems |
| US6661837B1 (en) | 1999-03-08 | 2003-12-09 | International Business Machines Corporation | Modems, methods, and computer program products for selecting an optimum data rate using error signals representing the difference between the output of an equalizer and the output of a slicer or detector |
| US6381267B1 (en) | 1999-03-08 | 2002-04-30 | International Business Machines Corporation | Modems, methods, and computer program products for falling back to a lower data rate protocol upon detecting abnormal line conditions during startup |
| US6341360B1 (en) * | 1999-03-08 | 2002-01-22 | International Business Machines Corporation | Decision feedback equalizers, methods, and computer program products for detecting severe error events and preserving equalizer filter characteristics in response thereto |
| US6553518B1 (en) | 1999-03-08 | 2003-04-22 | International Business Machines Corporation | Severe error detectors, methods and computer program products that use constellation specific error event thresholds to detect severe error events during demodulation of a signal comprising symbols from a plurality of symbol constellations |
| US7003030B2 (en) | 1999-03-08 | 2006-02-21 | Lenovo (Singapore) Pte. Ltd. | Receivers, methods, and computer program products for an analog modem that receives data signals from a digital modem |
| US6389064B1 (en) * | 1999-03-08 | 2002-05-14 | International Business Machines Corporation | Modems, methods, and computer program products for identifying a signaling alphabet in variance with an ideal alphabet due to digital impairments |
| US6816100B1 (en) | 1999-03-12 | 2004-11-09 | The Regents Of The University Of California | Analog-to-digital converters with common-mode rejection dynamic element matching, including as used in delta-sigma modulators |
| US6661847B1 (en) | 1999-05-20 | 2003-12-09 | International Business Machines Corporation | Systems methods and computer program products for generating and optimizing signal constellations |
| GB2362063A (en) * | 2000-04-25 | 2001-11-07 | Mitel Corp | Connecting broadband voice and data signals to telephone systems |
| US7190718B2 (en) * | 2002-07-17 | 2007-03-13 | Broadcom Corporation | Method and apparatus for determining a receiver sampling phase for use in diagnosing a channel |
| US7239680B2 (en) * | 2002-07-17 | 2007-07-03 | Broadcom Corporation | Methods for performing channel diagnostics |
| US7251213B2 (en) * | 2002-09-17 | 2007-07-31 | At&T Corp. | Method for remote measurement of echo path delay |
| US7440499B2 (en) * | 2004-01-29 | 2008-10-21 | Infineon Technologies Ag | Fractional spaced equalizer |
| DE102004025576B4 (de) * | 2004-05-25 | 2006-03-30 | Infineon Technologies Ag | Sende-und Empfangsanordnung mit einer Regelung zur Störsignalunterdrückung |
| EP1796281B1 (en) * | 2005-12-09 | 2015-08-12 | Mitel Networks Corporation | Echo canceller |
| JP4771532B2 (ja) * | 2006-02-01 | 2011-09-14 | オンセミコンダクター・トレーディング・リミテッド | エコー防止回路及びデジタル信号処理回路 |
| US8331430B2 (en) * | 2006-08-02 | 2012-12-11 | Broadcom Corporation | Channel diagnostic systems and methods |
| CN103557753B (zh) * | 2013-10-24 | 2015-05-27 | 北京理工大学 | 一种激光回波模拟装置及方法 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL170688C (nl) * | 1976-06-28 | 1982-12-01 | Philips Nv | Inrichting voor simultane tweerichtingsdatatransmissie over tweedraadsverbindingen. |
| JPS5617532A (en) * | 1979-07-20 | 1981-02-19 | Nec Corp | Automatic equalizer |
-
1981
- 1981-11-19 GB GB08134898A patent/GB2111354B/en not_active Expired
-
1982
- 1982-11-18 EP EP82903466A patent/EP0096048B1/en not_active Expired
- 1982-11-18 WO PCT/GB1982/000329 patent/WO1983001876A1/en not_active Ceased
- 1982-11-18 DE DE19823242577 patent/DE3242577A1/de not_active Withdrawn
- 1982-11-18 ES ES517479A patent/ES517479A0/es active Granted
- 1982-11-18 US US06/522,378 patent/US4539675A/en not_active Expired - Lifetime
- 1982-11-18 FI FI823967A patent/FI74560C/fi not_active IP Right Cessation
- 1982-11-18 NO NO823856A patent/NO161098C/no unknown
- 1982-11-18 DE DE8282903466T patent/DE3272474D1/de not_active Expired
- 1982-11-19 CA CA000415944A patent/CA1210471A/en not_active Expired
- 1982-11-19 BE BE2/59916A patent/BE895066R/fr active
- 1982-11-19 NL NL8204483A patent/NL8204483A/nl not_active Application Discontinuation
- 1982-11-19 SE SE8206608A patent/SE8206608D0/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NO161098C (no) | 1989-06-28 |
| FI74560B (fi) | 1987-10-30 |
| US4539675A (en) | 1985-09-03 |
| GB2111354A (en) | 1983-06-29 |
| ES8402128A1 (es) | 1984-01-16 |
| ES517479A0 (es) | 1984-01-16 |
| EP0096048A1 (en) | 1983-12-21 |
| DE3272474D1 (en) | 1986-09-11 |
| WO1983001876A1 (en) | 1983-05-26 |
| NO161098B (no) | 1989-03-20 |
| EP0096048B1 (en) | 1986-08-06 |
| SE8206608D0 (sv) | 1982-11-19 |
| NO823856L (no) | 1983-05-20 |
| FI74560C (fi) | 1988-02-08 |
| GB2111354B (en) | 1985-06-19 |
| DE3242577A1 (de) | 1983-05-26 |
| FI823967A0 (fi) | 1982-11-18 |
| BE895066R (fr) | 1983-05-19 |
| FI823967L (fi) | 1983-05-20 |
| CA1210471A (en) | 1986-08-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A85 | Still pending on 85-01-01 | ||
| BV | The patent application has lapsed |