GB1254807A - Improvements in or relating to interrogation-reply systems - Google Patents
Improvements in or relating to interrogation-reply systemsInfo
- Publication number
- GB1254807A GB1254807A GB2380570A GB2380570A GB1254807A GB 1254807 A GB1254807 A GB 1254807A GB 2380570 A GB2380570 A GB 2380570A GB 2380570 A GB2380570 A GB 2380570A GB 1254807 A GB1254807 A GB 1254807A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reply
- interrogation
- codes
- stored
- responder
- 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
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
- G01S13/76—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted
- G01S13/78—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted discriminating between different kinds of targets, e.g. IFF-radar, i.e. identification of friend or foe
- G01S13/781—Secondary Surveillance Radar [SSR] in general
- G01S13/782—Secondary Surveillance Radar [SSR] in general using multimoding or selective addressing
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
1,254,807. Transponder apparatus. SIEMENS A.G. 18 May, 1970 [12 Sept., 1969], No. 23805/70. Heading H4L. In,an interrogation-reply system, interference with the interrogation signals is prevented by coding. The codes may be stored in the form of printed circuits which are selected for transmission arbitrarily. At the responder, a decoder checks for coincidence between an incoming code and a corresponding code stored in the responder, which causes the required information to be inserted in the reply signal. The reply is analysed at the interrogation unit, in a decoder, on the basis of the stored, previously transmitted, codes. Complete identity of the transmitted codes is not required and the reply is accepted when small timing displacements occur.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19691946247 DE1946247C3 (en) | 1969-09-12 | 1969-09-12 | Interrogation-response system for various interrogation codes that works according to the radio re-radiation principle |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1254807A true GB1254807A (en) | 1971-11-24 |
Family
ID=5745336
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2380570A Expired GB1254807A (en) | 1969-09-12 | 1970-05-18 | Improvements in or relating to interrogation-reply systems |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE1946247C3 (en) |
FR (1) | FR2099732A5 (en) |
GB (1) | GB1254807A (en) |
NL (1) | NL151799B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2551219A1 (en) * | 1979-10-16 | 1985-03-01 | Siemens Ag | INSTALLATION FOR IDENTIFICATION AMI-ENEMY |
WO1995033215A1 (en) * | 1994-06-01 | 1995-12-07 | Michael Coveley | Radio range finder |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2365675C1 (en) * | 1973-11-09 | 1988-11-10 | Siemens AG, 1000 Berlin und 8000 München | Query-response system with a primary radar and with filters in the response station |
US4067011A (en) * | 1976-10-22 | 1978-01-03 | Motorola, Inc. | Digital transponder universal pulse assembly |
DE2747388A1 (en) * | 1977-10-21 | 1979-04-26 | Siemens Ag | Wireless closed loop alarm system - uses digital signals with ROM-controlled code and two transceivers with logic circuitry |
DE2826902C3 (en) * | 1978-06-20 | 1980-12-11 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Arrangement for eliminating fruit interference in a secondary radar system with co-channel operation and interrogation station marking |
GB2112607B (en) * | 1981-12-18 | 1986-01-02 | Senelco Ltd | Transmitter/responder systems |
ZA829121B (en) * | 1981-12-18 | 1983-09-28 | Senelco Ltd | Transmitter/responder systems |
-
1969
- 1969-09-12 DE DE19691946247 patent/DE1946247C3/en not_active Expired
-
1970
- 1970-05-18 GB GB2380570A patent/GB1254807A/en not_active Expired
- 1970-09-07 NL NL7013176A patent/NL151799B/en not_active IP Right Cessation
- 1970-09-14 FR FR7033187A patent/FR2099732A5/fr not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2551219A1 (en) * | 1979-10-16 | 1985-03-01 | Siemens Ag | INSTALLATION FOR IDENTIFICATION AMI-ENEMY |
WO1995033215A1 (en) * | 1994-06-01 | 1995-12-07 | Michael Coveley | Radio range finder |
AU696060B2 (en) * | 1994-06-01 | 1998-08-27 | Michael Coveley | Radio range finder |
Also Published As
Publication number | Publication date |
---|---|
NL7013176A (en) | 1971-11-25 |
DE1946247A1 (en) | 1971-07-29 |
FR2099732A5 (en) | 1972-03-17 |
DE1946247B2 (en) | 1973-03-15 |
NL151799B (en) | 1976-12-15 |
DE1946247C3 (en) | 1973-09-27 |
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