IT1129957B - Impianto per comunicazioni elettriche con onde elettromagnetiche - Google Patents
Impianto per comunicazioni elettriche con onde elettromagneticheInfo
- Publication number
- IT1129957B IT1129957B IT19115/80A IT1911580A IT1129957B IT 1129957 B IT1129957 B IT 1129957B IT 19115/80 A IT19115/80 A IT 19115/80A IT 1911580 A IT1911580 A IT 1911580A IT 1129957 B IT1129957 B IT 1129957B
- Authority
- IT
- Italy
- Prior art keywords
- plant
- electromagnetic waves
- electric communications
- communications
- electric
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B14/00—Transmission systems not characterised by the medium used for transmission
- H04B14/002—Transmission systems not characterised by the medium used for transmission characterised by the use of a carrier modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
- H04K1/003—Secret communication by varying carrier frequency at or within predetermined or random intervals
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2901670A DE2901670C2 (de) | 1979-01-17 | 1979-01-17 | Nachrichtenübertragungssystem für elektromagnetische Wellen |
Publications (2)
Publication Number | Publication Date |
---|---|
IT8019115A0 IT8019115A0 (it) | 1980-01-10 |
IT1129957B true IT1129957B (it) | 1986-06-11 |
Family
ID=6060768
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT19115/80A IT1129957B (it) | 1979-01-17 | 1980-01-10 | Impianto per comunicazioni elettriche con onde elettromagnetiche |
Country Status (5)
Country | Link |
---|---|
US (1) | US4312072A (it) |
JP (1) | JPS5596732A (it) |
DE (1) | DE2901670C2 (it) |
IE (1) | IE49499B1 (it) |
IT (1) | IT1129957B (it) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2509559B1 (fr) * | 1981-07-10 | 1986-03-21 | Thomson Csf | Procede de transmission numerique d'images video du type television et emetteur-recepteur correspondant |
US4468792A (en) * | 1981-09-14 | 1984-08-28 | General Electric Company | Method and apparatus for data transmission using chirped frequency-shift-keying modulation |
GB8300076D0 (en) * | 1983-01-04 | 2010-03-10 | Secr Defence | Electronic detector circuit |
US4654705A (en) * | 1983-12-30 | 1987-03-31 | Zenith Electronics Corporation | Two channel audio scrambling system |
US4614945A (en) * | 1985-02-20 | 1986-09-30 | Diversified Energies, Inc. | Automatic/remote RF instrument reading method and apparatus |
EP0208425A3 (en) * | 1985-06-13 | 1988-01-13 | Devon County Council | Television sub-carrier transmission |
US4799059A (en) * | 1986-03-14 | 1989-01-17 | Enscan, Inc. | Automatic/remote RF instrument monitoring system |
US4654859A (en) * | 1986-04-09 | 1987-03-31 | Racal Data Communications Inc. | Frequency synthesizer for frequency hopping communication system |
US5271042A (en) * | 1989-10-13 | 1993-12-14 | Motorola, Inc. | Soft decision decoding with channel equalization |
US6047023A (en) * | 1997-05-14 | 2000-04-04 | Hughes Electronics Corporation | Swept frequency modulation and demodulation technique |
US6333975B1 (en) | 1998-03-03 | 2001-12-25 | Itron, Inc. | Method and system for reading intelligent utility meters |
US6529712B1 (en) * | 1999-08-25 | 2003-03-04 | Conexant Systems, Inc. | System and method for amplifying a cellular radio signal |
EP1595379A2 (en) * | 2003-02-14 | 2005-11-16 | Focus Enhancements, Inc. | Method and apparatus for frequency division multiplexing |
US8953318B1 (en) * | 2010-09-13 | 2015-02-10 | The Board Of Trustees Of The University Of Alabama, For And On Behalf Of The University Of Alabama In Huntsville | Passive cooling systems and methods for electronics |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB747851A (en) * | 1950-12-06 | 1956-04-18 | Nat Res Dev | Improvements in and relating to electrical signalling |
US3387220A (en) * | 1965-02-23 | 1968-06-04 | Automatic Elect Lab | Apparatus and method for synchronously demodulating frequency modulated differentially coherent duobinary signals |
US3484693A (en) * | 1966-01-03 | 1969-12-16 | Gen Electric | Frequency shifted sliding tone sampled data communication system |
US3679983A (en) * | 1971-01-18 | 1972-07-25 | Bell Telephone Labor Inc | Phase distortion detector for detecting phase distortion on a linearly frequency modulated waveform |
JPS5162614A (en) * | 1974-11-28 | 1976-05-31 | Juseidaijin | ssra tsushinyodokino hohoto sochi |
US4064361A (en) * | 1975-12-31 | 1977-12-20 | Bell Telephone Laboratories, Incorporated | Correlative timing recovery in digital data transmission systems |
US4209750A (en) * | 1978-06-19 | 1980-06-24 | The Foxboro Company | Swept-carrier transmission system adapted for use in process control systems |
-
1979
- 1979-01-17 DE DE2901670A patent/DE2901670C2/de not_active Expired
- 1979-12-31 US US06/108,460 patent/US4312072A/en not_active Expired - Lifetime
-
1980
- 1980-01-10 IT IT19115/80A patent/IT1129957B/it active
- 1980-01-16 IE IE84/80A patent/IE49499B1/en unknown
- 1980-01-17 JP JP314480A patent/JPS5596732A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
JPS5596732A (en) | 1980-07-23 |
IE800084L (en) | 1980-07-17 |
DE2901670C2 (de) | 1981-02-19 |
US4312072A (en) | 1982-01-19 |
IE49499B1 (en) | 1985-10-16 |
IT8019115A0 (it) | 1980-01-10 |
DE2901670B1 (de) | 1980-06-12 |
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