DE3784490D1 - Echokompensationseinrichtung mit korrektur von phasenabweichungen. - Google Patents
Echokompensationseinrichtung mit korrektur von phasenabweichungen.Info
- Publication number
- DE3784490D1 DE3784490D1 DE8787430015T DE3784490T DE3784490D1 DE 3784490 D1 DE3784490 D1 DE 3784490D1 DE 8787430015 T DE8787430015 T DE 8787430015T DE 3784490 T DE3784490 T DE 3784490T DE 3784490 D1 DE3784490 D1 DE 3784490D1
- Authority
- DE
- Germany
- Prior art keywords
- value
- phase
- roll
- signal
- multiplier
- 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 - Lifetime
Links
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
- H04B3/232—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
-
- 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
- H04B3/237—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 two adaptive filters, e.g. for near end and for end echo cancelling
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Bidirectional Digital Transmission (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP87430015A EP0287743B1 (de) | 1987-04-22 | 1987-04-22 | Echokompensationseinrichtung mit Korrektur von Phasenabweichungen |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3784490D1 true DE3784490D1 (de) | 1993-04-08 |
DE3784490T2 DE3784490T2 (de) | 1993-09-16 |
Family
ID=8198305
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8787430015T Expired - Lifetime DE3784490T2 (de) | 1987-04-22 | 1987-04-22 | Echokompensationseinrichtung mit korrektur von phasenabweichungen. |
Country Status (4)
Country | Link |
---|---|
US (1) | US4887258A (de) |
EP (1) | EP0287743B1 (de) |
JP (1) | JPH0758924B2 (de) |
DE (1) | DE3784490T2 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE68924261T2 (de) * | 1989-06-22 | 1996-03-21 | Ibm | Echokompensationseinrichtung mit Anpassung der Echokompensationskoeffizienten während der Vollduplexübertragung. |
US5189664A (en) * | 1991-02-19 | 1993-02-23 | Silicon Systems, Inc. | Listener echo cancellation |
US5319636A (en) * | 1991-11-14 | 1994-06-07 | Codex Corporation | Device and method for linear listener echo cancellation |
IT1254819B (it) * | 1992-02-24 | 1995-10-11 | Sits Soc It Telecom Siemens | Procedimento e dispositivo per la cancellazione numerica adattativa dell'eco generato in collegamenti telefonici non stazionari |
US7164659B2 (en) * | 1999-12-09 | 2007-01-16 | Broadcom Corporation | Adaptive gain control based on echo canceller performance information |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2479617A1 (fr) * | 1980-03-26 | 1981-10-02 | Trt Telecom Radio Electr | Annuleur d'echo pour signal d'echo a phase variable |
NL8102225A (nl) * | 1981-05-07 | 1982-12-01 | Philips Nv | Inrichting voor het compenseren van echosignalen. |
US4464545A (en) * | 1981-07-13 | 1984-08-07 | Bell Telephone Laboratories, Incorporated | Echo canceller |
FR2534427A1 (fr) * | 1982-10-11 | 1984-04-13 | Trt Telecom Radio Electr | Annuleur d'echo pour signal de donnees en bande de base |
-
1987
- 1987-04-22 DE DE8787430015T patent/DE3784490T2/de not_active Expired - Lifetime
- 1987-04-22 EP EP87430015A patent/EP0287743B1/de not_active Expired - Lifetime
-
1988
- 1988-02-19 JP JP63035452A patent/JPH0758924B2/ja not_active Expired - Lifetime
- 1988-03-04 US US07/164,305 patent/US4887258A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE3784490T2 (de) | 1993-09-16 |
JPS63274227A (ja) | 1988-11-11 |
US4887258A (en) | 1989-12-12 |
EP0287743A1 (de) | 1988-10-26 |
JPH0758924B2 (ja) | 1995-06-21 |
EP0287743B1 (de) | 1993-03-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2013797A1 (en) | Fast training echo canceller | |
DE3784490D1 (de) | Echokompensationseinrichtung mit korrektur von phasenabweichungen. | |
JPS53102286A (en) | Electrochromic display device | |
IE822791L (en) | Apparatus for bringing an oscillator into phase with¹an incoming signal | |
JPS5258345A (en) | Transistor circuit | |
JPS53132617A (en) | Electronic type fuel supplying system | |
JPS56145964A (en) | Aqueous adhesive | |
JPS5311934A (en) | Remoistening adhesive paper and its production | |
JPS5312805A (en) | Hydrolysis of cyano compounds | |
AU504289B2 (en) | Gusseted structural connection | |
JPS5350264A (en) | Polymer composition | |
JPS5337361A (en) | Dpcm unit | |
JPS5377412A (en) | Noise eliminating circuit | |
JPS5350241A (en) | Electrodeposit coating | |
JPS547828A (en) | Balanced reception circuit | |
JPS5357941A (en) | Multiplier using hall element | |
JPS554558A (en) | Liquid leakage detecting system | |
JPS51128550A (en) | Supplementation method for primary output convertion of trans-ducer co nvertion of transducer | |
JPS53108234A (en) | Color synchronous circuit | |
JPS53127257A (en) | Frequency-voltage convertor | |
JPS5354674A (en) | Mark positioning method | |
GOLLVIK et al. | A spectral primitive shallow water model on an equatorial beta-plane(eigenvectors) | |
JPS5379324A (en) | Ink jet recording device | |
JPS5313445A (en) | Pulse converting circuit | |
MASTERSON | Branched affine(or projective) structures on Riemann structures[Ph. D. Thesis] |