GB1443063A - Pulse pair decoder - Google Patents
Pulse pair decoderInfo
- Publication number
- GB1443063A GB1443063A GB1701275A GB1701275A GB1443063A GB 1443063 A GB1443063 A GB 1443063A GB 1701275 A GB1701275 A GB 1701275A GB 1701275 A GB1701275 A GB 1701275A GB 1443063 A GB1443063 A GB 1443063A
- Authority
- GB
- United Kingdom
- Prior art keywords
- counter
- flop
- pulses
- flip
- clock pulses
- 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
- G01S13/785—Distance Measuring Equipment [DME] systems
- G01S13/788—Coders or decoders therefor; Special detection circuits
-
- 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
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
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
1443063 Pulse-pair decoding INTERNATIONAL STANDARD ELECTRIC CORP 24 April 1975 [24 April 1974] 17012/75 Heading G4H In a decoder for decoding a pair of input pulses with a characteristic spacing between the pulses, count recognition means are responsive to a series of counters which take on in turn the counting of clock pulses, the first of the series starting counting in response to each input pulse. A pair of pulses with a characteristic time separation is recognized by using each to set a control flip-flop associated with the first of a chain of identical binary counters to cause the counter to count clock pulses. When the first counter reaches capacity it resets its control flip-flop to stop counting the clock pulses and sets the control flip-flop of the next counter which then starts to count the clock pulses, and so on. Gates respond to stages of the first counter to set and reset a flip-flop to define a tolerance window. This flip-flop partially enables two output gates relating to respective time separations to be recognized, one of them also being partially enabled by gates responsive to stages of the second counter and the other also being partially enabled by the "capacity" (overflow) output of the fourth (last) counter. The resolution power of the decoder corresponds to the capacity of the first counter. The invention can be applied in TACAN or DME radio navigation systems.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7414146A FR2269241B1 (en) | 1974-04-24 | 1974-04-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1443063A true GB1443063A (en) | 1976-07-21 |
Family
ID=9138033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1701275A Expired GB1443063A (en) | 1974-04-24 | 1975-04-24 | Pulse pair decoder |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE2517116A1 (en) |
| FR (1) | FR2269241B1 (en) |
| GB (1) | GB1443063A (en) |
| IT (1) | IT1037573B (en) |
-
1974
- 1974-04-24 FR FR7414146A patent/FR2269241B1/fr not_active Expired
-
1975
- 1975-04-18 DE DE19752517116 patent/DE2517116A1/en active Pending
- 1975-04-23 IT IT2261175A patent/IT1037573B/en active
- 1975-04-24 GB GB1701275A patent/GB1443063A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2517116A1 (en) | 1975-11-13 |
| IT1037573B (en) | 1979-11-20 |
| FR2269241B1 (en) | 1977-10-28 |
| FR2269241A1 (en) | 1975-11-21 |
| AU8041875A (en) | 1976-10-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |