RO87057B - Metoda de producere a curentilor purtatori pentru sisteme de curenti purtatori multicai - Google Patents
Metoda de producere a curentilor purtatori pentru sisteme de curenti purtatori multicaiInfo
- Publication number
- RO87057B RO87057B RO109751A RO10975183A RO87057B RO 87057 B RO87057 B RO 87057B RO 109751 A RO109751 A RO 109751A RO 10975183 A RO10975183 A RO 10975183A RO 87057 B RO87057 B RO 87057B
- Authority
- RO
- Romania
- Prior art keywords
- frequency
- carrier
- current systems
- producing
- frequency band
- Prior art date
Links
- 238000000034 method Methods 0.000 title abstract 2
- 230000005540 biological transmission Effects 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/12—Arrangements for reducing cross-talk between channels
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/06—Arrangements for supplying the carrier waves ; Arrangements for supplying synchronisation signals
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Transmitters (AREA)
Abstract
Inventia se referp la o metoda pentru producerea de curenti purtatori semnale de frecvente pilot, precum si semnale locale pentru sisteme de curenti purtatori multicai. la care într-o banda de frecventa superioara si inferioara se alege o frecventa de baza pentru asigurarea unei transmisii. Din aceasta frecventa de baza printr-o multiplicare cu numar impar a frecventei de baza se obtine în apropierea limitei inferioare a benzii de frecventa superioare un semnal pilot inferior de sus si printr-o multiplicare cu un numar par a frecventei de baza se obtine în apropierea limitei superioare atat a benzii de frecventa inferioare cat si acelei superioare un semnal pilot superior de jos respectiv sus. Metoda, conform inventiei asigura un nivel redus al dianoniei sau o diafonie neinteligibila asigurand în acelas timp o înalta calitate a transmisiei.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
HU14682A HU184499B (en) | 1982-01-20 | 1982-01-20 | Method for generating the carrier, pilot and local signals of carrier system and carrier network |
Publications (2)
Publication Number | Publication Date |
---|---|
RO87057A RO87057A (ro) | 1985-06-29 |
RO87057B true RO87057B (ro) | 1985-06-30 |
Family
ID=10948160
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
RO109751A RO87057B (ro) | 1982-01-20 | 1983-01-17 | Metoda de producere a curentilor purtatori pentru sisteme de curenti purtatori multicai |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0084462B1 (ro) |
DD (1) | DD213105A5 (ro) |
DE (1) | DE3300950C2 (ro) |
HU (1) | HU184499B (ro) |
PL (1) | PL141495B1 (ro) |
RO (1) | RO87057B (ro) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
HU191731B (en) * | 1984-12-19 | 1987-04-28 | Telefongyar | Circuit arrangement for generating system carrier, line pilot and channel carrier-control frequencies of multichannel open cable telephon equipments |
DE4017403C1 (en) * | 1990-05-30 | 1991-12-19 | Ant Nachrichtentechnik Gmbh, 7150 Backnang, De | Frequency multiplexing transmission system for satellite - selects mixing frequency signals so that frequency bands overlap by one channel |
GB2260872B (en) * | 1991-09-20 | 1995-10-25 | Sharp Kk | An optical transmission system |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB783509A (en) * | 1953-06-30 | 1957-09-25 | Telephone Mfg Co Ltd | Improvements in modulating arrangements for carrier wave telephone or like systems |
US3450841A (en) * | 1965-08-02 | 1969-06-17 | Int Standard Electric Corp | Carrier frequency stabilization for carrier frequency systems with suppressed carrier waves |
-
1982
- 1982-01-20 HU HU14682A patent/HU184499B/hu not_active IP Right Cessation
-
1983
- 1983-01-13 DE DE19833300950 patent/DE3300950C2/de not_active Expired
- 1983-01-17 RO RO109751A patent/RO87057B/ro unknown
- 1983-01-18 PL PL24021083A patent/PL141495B1/pl unknown
- 1983-01-19 DD DD24735383A patent/DD213105A5/de unknown
- 1983-01-19 EP EP19830300266 patent/EP0084462B1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
HU184499B (en) | 1984-08-28 |
DD213105A5 (de) | 1984-08-29 |
PL240210A1 (en) | 1983-09-26 |
PL141495B1 (en) | 1987-07-31 |
DE3300950C2 (de) | 1986-08-28 |
RO87057A (ro) | 1985-06-29 |
EP0084462A3 (en) | 1984-02-08 |
EP0084462A2 (en) | 1983-07-27 |
DE3300950A1 (de) | 1983-11-03 |
EP0084462B1 (en) | 1987-03-18 |
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