SE411332B - Utrustning for hojning av sekerheten mot overforingsfel vid ett informationsoverforingssystem - Google Patents
Utrustning for hojning av sekerheten mot overforingsfel vid ett informationsoverforingssystemInfo
- Publication number
- SE411332B SE411332B SE7702372A SE7702372A SE411332B SE 411332 B SE411332 B SE 411332B SE 7702372 A SE7702372 A SE 7702372A SE 7702372 A SE7702372 A SE 7702372A SE 411332 B SE411332 B SE 411332B
- Authority
- SE
- Sweden
- Prior art keywords
- equipment
- security against
- increasing security
- transmission system
- information transmission
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
- G01S13/75—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors
- G01S13/751—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal
- G01S13/753—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal using frequency selective elements, e.g. resonator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L25/00—Recording or indicating positions or identities of vehicles or vehicle trains or setting of track apparatus
- B61L25/02—Indicating or recording positions or identities of vehicles or vehicle trains
- B61L25/04—Indicating or recording train identities
- B61L25/045—Indicating or recording train identities using reradiating tags
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Mechanical Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
- Noise Elimination (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2612967A DE2612967C2 (de) | 1976-03-26 | 1976-03-26 | Einrichtung zum Erhöhen der Sicherheit gegen Übertragungsfehler bei einem Informationsübertragtingssystem mit periodisch durchstimmbarem, frequenz-1 selektiv reflektiertem Abfragesignal |
Publications (2)
Publication Number | Publication Date |
---|---|
SE7702372L SE7702372L (sv) | 1977-09-27 |
SE411332B true SE411332B (sv) | 1979-12-17 |
Family
ID=5973543
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE7702372A SE411332B (sv) | 1976-03-26 | 1977-03-03 | Utrustning for hojning av sekerheten mot overforingsfel vid ett informationsoverforingssystem |
Country Status (7)
Country | Link |
---|---|
US (1) | US4138676A (sv) |
CA (1) | CA1080331A (sv) |
CH (1) | CH607507A5 (sv) |
DE (1) | DE2612967C2 (sv) |
FR (1) | FR2345730A1 (sv) |
SE (1) | SE411332B (sv) |
ZA (1) | ZA771769B (sv) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3002727A1 (de) * | 1980-01-25 | 1981-07-30 | Siemens AG, 1000 Berlin und 8000 München | System zur identifizierung von gegenstaenden und personen und zur informationsuebermittlung |
DE3050223A1 (de) * | 1980-02-29 | 1982-06-03 | E Shapiro | Method of transmission of communications from a transponder to an interrogator and secondary radar system for its implementation |
DE3122481C1 (de) * | 1981-06-05 | 1982-11-04 | Siemens AG, 1000 Berlin und 8000 München | Informationsübertragungseinrichtung |
JP3106088B2 (ja) * | 1995-05-26 | 2000-11-06 | 三菱電機株式会社 | レーダ・トランスポンダ |
US7168024B2 (en) * | 2003-10-03 | 2007-01-23 | Jennic Limited | Data processing system and method |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4037227A (en) * | 1966-04-11 | 1977-07-19 | The United States Of America As Represented By The Secretary Of The Air Force | Controlled deception jamming device |
US3863244A (en) * | 1972-06-14 | 1975-01-28 | Lichtblau G J | Electronic security system having improved noise discrimination |
US3969725A (en) * | 1974-06-12 | 1976-07-13 | The United States Of America As Represented By The Secretary Of Transportation | Distance measuring equipment |
-
1976
- 1976-03-26 DE DE2612967A patent/DE2612967C2/de not_active Expired
- 1976-12-21 CH CH1606376A patent/CH607507A5/xx not_active IP Right Cessation
-
1977
- 1977-02-11 FR FR7703897A patent/FR2345730A1/fr active Granted
- 1977-03-03 SE SE7702372A patent/SE411332B/sv not_active IP Right Cessation
- 1977-03-11 US US05/776,765 patent/US4138676A/en not_active Expired - Lifetime
- 1977-03-23 CA CA274,604A patent/CA1080331A/en not_active Expired
- 1977-03-24 ZA ZA00771769A patent/ZA771769B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
US4138676A (en) | 1979-02-06 |
DE2612967C2 (de) | 1978-04-06 |
CH607507A5 (sv) | 1978-12-29 |
ZA771769B (en) | 1978-02-22 |
SE7702372L (sv) | 1977-09-27 |
CA1080331A (en) | 1980-06-24 |
FR2345730B1 (sv) | 1980-01-11 |
DE2612967B1 (de) | 1977-08-11 |
FR2345730A1 (fr) | 1977-10-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NUG | Patent has lapsed |
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