JPS6324582B2 - - Google Patents
Info
- Publication number
- JPS6324582B2 JPS6324582B2 JP55156067A JP15606780A JPS6324582B2 JP S6324582 B2 JPS6324582 B2 JP S6324582B2 JP 55156067 A JP55156067 A JP 55156067A JP 15606780 A JP15606780 A JP 15606780A JP S6324582 B2 JPS6324582 B2 JP S6324582B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- carrier
- level
- carrier wave
- circuit
- 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
- 238000001514 detection method Methods 0.000 claims description 93
- 230000007423 decrease Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 description 17
- 238000011084 recovery Methods 0.000 description 16
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000003044 adaptive effect Effects 0.000 description 4
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000001052 transient effect Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000004913 activation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- VZUGBLTVBZJZOE-KRWDZBQOSA-N n-[3-[(4s)-2-amino-1,4-dimethyl-6-oxo-5h-pyrimidin-4-yl]phenyl]-5-chloropyrimidine-2-carboxamide Chemical compound N1=C(N)N(C)C(=O)C[C@@]1(C)C1=CC=CC(NC(=O)C=2N=CC(Cl)=CN=2)=C1 VZUGBLTVBZJZOE-KRWDZBQOSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
- H04L1/206—Arrangements for detecting or preventing errors in the information received using signal quality detector for modulated signals
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7927479A FR2469837A1 (fr) | 1979-11-07 | 1979-11-07 | Dispositif de detection de porteuse dans un modem muni d'un annuleur d'echo |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56138352A JPS56138352A (en) | 1981-10-28 |
| JPS6324582B2 true JPS6324582B2 (online.php) | 1988-05-21 |
Family
ID=9231397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15606780A Granted JPS56138352A (en) | 1979-11-07 | 1980-11-07 | Carrier wave detector |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4355406A (online.php) |
| EP (1) | EP0028857B1 (online.php) |
| JP (1) | JPS56138352A (online.php) |
| CA (1) | CA1149022A (online.php) |
| DE (1) | DE3062462D1 (online.php) |
| FR (1) | FR2469837A1 (online.php) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2517906A1 (fr) * | 1981-12-03 | 1983-06-10 | Centre Nat Rech Scient | Annulateur d'echo a commande automatique de gain pour systemes de transmission |
| US4443884A (en) * | 1982-03-18 | 1984-04-17 | Protocol Computers, Inc. | Data line interface |
| JPH0666819B2 (ja) * | 1982-09-30 | 1994-08-24 | 富士通株式会社 | キヤリア検出方式 |
| FR2534754A1 (fr) * | 1982-10-15 | 1984-04-20 | Trt Telecom Radio Electr | Recepteur pour modem de transmission de donnees, comportant un annuleur d'echo et un egaliseur |
| US4593399A (en) * | 1983-05-09 | 1986-06-03 | Racal Data Communications Inc. | Method and apparatus for maximizing efficiency in satellite communications |
| GB2146509B (en) * | 1983-09-10 | 1986-08-13 | Stc Plc | Data transmission system |
| US4554508A (en) * | 1983-12-07 | 1985-11-19 | American Microsystems, Incorporated | Carrier detection circuit |
| SE441052B (sv) * | 1984-02-01 | 1985-09-02 | Ellemtel Utvecklings Ab | Forfarande for att testa funktionen hos en anordning for adaptiv ekoeliminering |
| US4546490A (en) * | 1984-03-22 | 1985-10-08 | Northern Telecom Limited | Single frequency detection circuit |
| DE3583052D1 (de) * | 1984-03-30 | 1991-07-11 | Siemens Ag | Schaltungsanordnung zum pruefen der funktionsfaehigkeit einer datenuebertragunseinrichtung. |
| US4766601A (en) * | 1985-12-23 | 1988-08-23 | Tektronix, Inc. | Constant carrier watchdog |
| US4742510A (en) * | 1986-04-04 | 1988-05-03 | Massachusetts Institute Of Technology | Near and far echo canceller for data communications |
| US4995030A (en) * | 1988-02-01 | 1991-02-19 | Memotec Datacom, Inc. | Far end echo cancellation method and apparatus |
| CN111934656A (zh) * | 2020-08-20 | 2020-11-13 | 索伦特(天津)自动化技术有限公司 | 气体超声流量计自动增益调整的滞回比较电路及实现方法 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE626509A (online.php) * | 1961-12-29 | |||
| US3275759A (en) * | 1963-04-15 | 1966-09-27 | Bell Telephone Labor Inc | Break-in arrangement with compensation for variations in the trans-hybrid loss for echo suppressors |
| US3560669A (en) * | 1969-02-25 | 1971-02-02 | Wescom | Echo suppressor |
| US3783194A (en) * | 1972-11-20 | 1974-01-01 | Milgo Electronic Corp | Data modem having a fast turn-around time over direct distance dialed networks |
| US4009356A (en) * | 1974-01-31 | 1977-02-22 | Milgo Electronic Corporation | Data modems having data drop-out and data echo protection |
| DE2442822C3 (de) * | 1974-09-06 | 1979-04-05 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Schaltungsanordnung zur Messung von auf Datenubertragungsstrecken auftretenden Pegelunterbrechungen und Pegelabsenkungen |
-
1979
- 1979-11-07 FR FR7927479A patent/FR2469837A1/fr active Granted
-
1980
- 1980-10-30 CA CA000363614A patent/CA1149022A/en not_active Expired
- 1980-10-31 EP EP80201034A patent/EP0028857B1/fr not_active Expired
- 1980-10-31 DE DE8080201034T patent/DE3062462D1/de not_active Expired
- 1980-11-03 US US06/203,161 patent/US4355406A/en not_active Expired - Lifetime
- 1980-11-07 JP JP15606780A patent/JPS56138352A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2469837A1 (fr) | 1981-05-22 |
| US4355406A (en) | 1982-10-19 |
| FR2469837B1 (online.php) | 1982-08-13 |
| CA1149022A (en) | 1983-06-28 |
| EP0028857B1 (fr) | 1983-03-23 |
| EP0028857A1 (fr) | 1981-05-20 |
| JPS56138352A (en) | 1981-10-28 |
| DE3062462D1 (en) | 1983-04-28 |
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