CA1181146A - Echo canceller for a variable phase echo signal - Google Patents
Echo canceller for a variable phase echo signalInfo
- Publication number
- CA1181146A CA1181146A CA000373390A CA373390A CA1181146A CA 1181146 A CA1181146 A CA 1181146A CA 000373390 A CA000373390 A CA 000373390A CA 373390 A CA373390 A CA 373390A CA 1181146 A CA1181146 A CA 1181146A
- Authority
- CA
- Canada
- Prior art keywords
- signal
- phase
- echo
- circuit
- instant
- 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
Links
- 230000003044 adaptive effect Effects 0.000 claims abstract description 39
- 239000000306 component Substances 0.000 claims description 69
- 238000004364 calculation method Methods 0.000 claims description 30
- 230000001276 controlling effect Effects 0.000 claims description 19
- 230000000051 modifying effect Effects 0.000 claims description 16
- 230000008859 change Effects 0.000 claims description 10
- 238000007792 addition Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 16
- 238000010586 diagram Methods 0.000 description 38
- 239000013598 vector Substances 0.000 description 10
- WSNMPAVSZJSIMT-UHFFFAOYSA-N COc1c(C)c2COC(=O)c2c(O)c1CC(O)C1(C)CCC(=O)O1 Chemical compound COc1c(C)c2COC(=O)c2c(O)c1CC(O)C1(C)CCC(=O)O1 WSNMPAVSZJSIMT-UHFFFAOYSA-N 0.000 description 8
- 239000000562 conjugate Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 230000004044 response Effects 0.000 description 8
- 230000008901 benefit Effects 0.000 description 6
- 238000005070 sampling Methods 0.000 description 6
- 230000010363 phase shift Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000000969 carrier Substances 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 229920000136 polysorbate Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000000844 transformation Methods 0.000 description 2
- 102220543152 Bis(5'-adenosyl)-triphosphatase_I10W_mutation Human genes 0.000 description 1
- 241000896693 Disa Species 0.000 description 1
- 102000020897 Formins Human genes 0.000 description 1
- 108091022623 Formins Proteins 0.000 description 1
- 101100286668 Mus musculus Irak1bp1 gene Proteins 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010396 two-hybrid screening Methods 0.000 description 1
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
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)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8006748 | 1980-03-26 | ||
| FR8006748A FR2479617A1 (fr) | 1980-03-26 | 1980-03-26 | Annuleur d'echo pour signal d'echo a phase variable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1181146A true CA1181146A (en) | 1985-01-15 |
Family
ID=9240140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000373390A Expired CA1181146A (en) | 1980-03-26 | 1981-03-19 | Echo canceller for a variable phase echo signal |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0036696A1 (enrdf_load_stackoverflow) |
| JP (1) | JPS56149832A (enrdf_load_stackoverflow) |
| AU (1) | AU545886B2 (enrdf_load_stackoverflow) |
| CA (1) | CA1181146A (enrdf_load_stackoverflow) |
| FR (1) | FR2479617A1 (enrdf_load_stackoverflow) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2487144B1 (fr) * | 1980-07-21 | 1986-10-24 | Trt Telecom Radio Electr | Dispositif d'annulation d'un signal d'echo composite |
| SE426765B (sv) * | 1981-11-02 | 1983-02-07 | Ellemtel Utvecklings Ab | Balansfilter av fir-typ ingaende i sendar-mottagarenheten i ett telekommunikationssystem |
| 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 |
| EP0270706B1 (fr) * | 1982-06-14 | 1993-03-24 | Telecommunications Radioelectriques Et Telephoniques T.R.T. | Procédé destiné à réduire le temps de convergence d'un annuleur d'écho |
| FR2546693B1 (fr) * | 1983-05-26 | 1985-08-30 | Centre Nat Rech Scient | Annuleur d'echo a filtre numerique adaptatif pour systeme de transmission |
| DE3327467A1 (de) * | 1983-07-29 | 1985-02-14 | Siemens AG, 1000 Berlin und 8000 München | Verfahren und schaltungsanordnung zur kompensation von echosignalen |
| FR2556530B1 (fr) * | 1983-10-28 | 1986-04-04 | Telediffusion Fse | Dispositif de correction d'echos, notamment pour systeme de diffusion de donnees |
| FR2569322B1 (fr) * | 1984-08-17 | 1986-12-05 | Trt Telecom Radio Electr | Annuleur d'echo utilisant la modulation delta |
| US4682358A (en) * | 1984-12-04 | 1987-07-21 | American Telephone And Telegraph Company | Echo canceller |
| NZ214905A (en) * | 1985-01-29 | 1988-09-29 | British Telecomm | Noise cancellation by adaptive filter compensates for timing variations |
| DE3784490T2 (de) * | 1987-04-22 | 1993-09-16 | Ibm | Echokompensationseinrichtung mit korrektur von phasenabweichungen. |
| US4813073A (en) * | 1987-07-02 | 1989-03-14 | Codex Corporation | Echo cancellation |
| CA1338218C (en) * | 1988-03-17 | 1996-04-02 | Yoshinori Tanaka | Echo canceller |
| FR2629293A1 (fr) * | 1988-03-25 | 1989-09-29 | Trt Telecom Radio Electr | Annuleur d'echo pour signal d'echo a phase variable |
| GB2240452A (en) * | 1990-01-10 | 1991-07-31 | Motorola Inc | Echo canceller has plurality of sub-band channels each with its own adaptive filter |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1403374A (en) * | 1972-05-11 | 1975-08-28 | Gkn Sankey Ltd | Wheels |
| US3866977A (en) * | 1972-05-17 | 1975-02-18 | Goodyear Tire & Rubber | Suppression of vibration in rotating discs |
| DE2833518A1 (de) * | 1978-07-31 | 1980-02-21 | Siemens Ag | Schaltungsanordnung zur kompensation von echos |
-
1980
- 1980-03-26 FR FR8006748A patent/FR2479617A1/fr active Granted
-
1981
- 1981-03-19 EP EP81200309A patent/EP0036696A1/fr not_active Ceased
- 1981-03-19 CA CA000373390A patent/CA1181146A/en not_active Expired
- 1981-03-25 AU AU68714/81A patent/AU545886B2/en not_active Ceased
- 1981-03-26 JP JP4328681A patent/JPS56149832A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0036696A1 (fr) | 1981-09-30 |
| AU6871481A (en) | 1981-10-01 |
| FR2479617B1 (enrdf_load_stackoverflow) | 1983-10-21 |
| AU545886B2 (en) | 1985-08-08 |
| JPS56149832A (en) | 1981-11-19 |
| FR2479617A1 (fr) | 1981-10-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1181146A (en) | Echo canceller for a variable phase echo signal | |
| US4813073A (en) | Echo cancellation | |
| US5132963A (en) | Echo cancelling device providing adjustment of the echo canceller coefficients during full-duplex transmission | |
| US4362909A (en) | Echo canceler with high-pass filter | |
| CA1118924A (en) | Method and device for digital echo cancellation | |
| US4742510A (en) | Near and far echo canceller for data communications | |
| US5406552A (en) | Device and method for linear listener echo cancellation | |
| DE2740123A1 (de) | Echoausloeschanordnung fuer eine zweidraht-zweiweg-datenuebertragungsanlage | |
| JP2510992B2 (ja) | 周波数変調されたデジタル信号用復調器 | |
| CA1181147A (en) | Arrangement for cancelling a composite echo signal | |
| US4334128A (en) | Echo canceler for homochronous data transmission systems | |
| IE57178B1 (en) | Noise cancellation | |
| EP0065796B1 (en) | Arrangement for cancelling echo signals | |
| GB1525706A (en) | Automatic passband equalizer for data transmission system | |
| EP0287742B1 (en) | Echo cancelling device for data transmission over two-wire line | |
| US3903377A (en) | Echo canceller utilizing correlation | |
| US4158232A (en) | Adaptive corrector | |
| US5303228A (en) | A far-end echo canceller with a digital filter for simulating a far end echo containing a frequency offset | |
| CA2224639A1 (en) | Method, device, dsp and modem for efficient echo canceler phase roll tracking | |
| US4965786A (en) | Echo canceller for a variable-phase echo signal | |
| JPH01129623A (ja) | エコーキヤンセラ | |
| EP0287743B1 (en) | Echo cancelling device with phase-roll correction | |
| US5446728A (en) | Method and arrangement for use in the elimination of echoes in a subscriber line circuit | |
| JPH0321122A (ja) | 全２重モデム用エコーキャンセラ回路 | |
| Alvarez | A performance study of various echo canceller structures for full-duplex 2-wire transmission environment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |