SE8203102L - Adaptiv ekokompenseringsanordning for digital duplexkommunikation via tvatradsledningar - Google Patents
Adaptiv ekokompenseringsanordning for digital duplexkommunikation via tvatradsledningarInfo
- Publication number
- SE8203102L SE8203102L SE8203102A SE8203102A SE8203102L SE 8203102 L SE8203102 L SE 8203102L SE 8203102 A SE8203102 A SE 8203102A SE 8203102 A SE8203102 A SE 8203102A SE 8203102 L SE8203102 L SE 8203102L
- Authority
- SE
- Sweden
- Prior art keywords
- filter
- signal
- wires
- adaptive
- compensation device
- Prior art date
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
- H04B3/237—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)
- Filters That Use Time-Delay Elements (AREA)
- Bidirectional Digital Transmission (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19813120434 DE3120434A1 (de) | 1981-05-22 | 1981-05-22 | Adaptive echokompensationseinrichtung zur digitalen duplexuebertragung auf zweidrahtleitungen |
Publications (2)
Publication Number | Publication Date |
---|---|
SE8203102L true SE8203102L (sv) | 1982-11-23 |
SE447619B SE447619B (sv) | 1986-11-24 |
Family
ID=6133005
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8203102A SE447619B (sv) | 1981-05-22 | 1982-05-18 | Anordning for att ansluta en kella och en senka till en tvatradsledning for digitalkommunikation |
Country Status (6)
Country | Link |
---|---|
AU (1) | AU549938B2 (sv) |
BE (1) | BE893274A (sv) |
CH (1) | CH657241A5 (sv) |
DE (1) | DE3120434A1 (sv) |
GB (1) | GB2102255B (sv) |
SE (1) | SE447619B (sv) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2540314A1 (fr) * | 1983-01-31 | 1984-08-03 | Trt Telecom Radio Electr | Procede d'initialisation des coefficients de filtres dans un dispositif d'annulation d'echos proche et lointain et dispositif de mise en oeuvre de ce procede |
JPS59151546A (ja) * | 1983-02-18 | 1984-08-30 | Nec Corp | 適応形反響消去装置 |
US4598396A (en) * | 1984-04-03 | 1986-07-01 | Itt Corporation | Duplex transmission mechanism for digital telephones |
SE461308B (sv) * | 1988-06-03 | 1990-01-29 | Ericsson Telefon Ab L M | Adaptivt digitalt filter omfattande en icke rekursiv del och en rekursiv del |
CA2004379C (en) * | 1988-12-01 | 1993-07-06 | Tetsu Taguchi | Echo canceller with means for determining filter coefficients from autocorrelation and cross-correlation coefficients |
GB2362063A (en) | 2000-04-25 | 2001-11-07 | Mitel Corp | Connecting broadband voice and data signals to telephone systems |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4087654A (en) * | 1975-11-28 | 1978-05-02 | Bell Telephone Laboratories, Incorporated | Echo canceller for two-wire full duplex data transmission |
SE416367B (sv) * | 1976-09-07 | 1980-12-15 | Western Electric Co | Ekoelimineringsanordning |
-
1981
- 1981-05-22 DE DE19813120434 patent/DE3120434A1/de not_active Withdrawn
-
1982
- 1982-05-18 GB GB08214410A patent/GB2102255B/en not_active Expired
- 1982-05-18 SE SE8203102A patent/SE447619B/sv not_active IP Right Cessation
- 1982-05-19 AU AU83816/82A patent/AU549938B2/en not_active Ceased
- 1982-05-19 CH CH311782A patent/CH657241A5/de not_active IP Right Cessation
- 1982-05-24 BE BE2/59718A patent/BE893274A/fr not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
GB2102255A (en) | 1983-01-26 |
DE3120434A1 (de) | 1982-12-16 |
AU549938B2 (en) | 1986-02-20 |
GB2102255B (en) | 1985-01-09 |
SE447619B (sv) | 1986-11-24 |
AU8381682A (en) | 1982-11-25 |
CH657241A5 (de) | 1986-08-15 |
BE893274A (fr) | 1982-11-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NUG | Patent has lapsed |
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