GB1086733A - Improvements in or relating to phase comparison radio navigation systems - Google Patents
Improvements in or relating to phase comparison radio navigation systemsInfo
- Publication number
- GB1086733A GB1086733A GB3035364A GB3035364A GB1086733A GB 1086733 A GB1086733 A GB 1086733A GB 3035364 A GB3035364 A GB 3035364A GB 3035364 A GB3035364 A GB 3035364A GB 1086733 A GB1086733 A GB 1086733A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phase
- frequency
- output
- transmission
- master station
- 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
- 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
- G01S1/08—Systems for determining direction or position line
- G01S1/20—Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems
- G01S1/30—Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems the synchronised signals being continuous waves or intermittent trains of continuous waves, the intermittency not being for the purpose of determining direction or position line and the transit times being compared by measuring the phase difference
- G01S1/306—Analogous systems in which frequency-related signals (harmonics) are compared in phase, e.g. DECCA systems
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Press Drives And Press Lines (AREA)
Abstract
1,086,733. Radio navigation. DECCA Ltd. July 16, 1965 [July 31, 1964], No. 30353/64. Heading H4D. The invention relates to a receiver in a hyperbolic navigation system of the type disclosed in Specifications 765,573 and 949,480, wherein each station in turn produces a multi-frequency transmission during periodic interruption in the normal transmissions said receiver using only one received frequency, and comprising a tuned receiver stage 11, tuned in this embodiment to the frequency normally produced by the master station. The receiver also comprises a phasecontrolled oscillator 14 operating at said frequency and feeding its output to one input of a phase discriminator 13 having the output of the receiver stage 11 applied to its other input. During the normal transmissions, the signal from the master station is thus compared in phase with the output of the oscillator, and a signal equal to the sine of the phase difference is used to control the phase of the oscillator via closed relay contact 17, such that the oscillator output is phase locked to the normal master station transmission. Break detector 18 detects the break in transmission of a specific length occurring at the end of the normal transmission period, and the beginning of the multi-frequency transmission period, and actuates a relay, such that contact 17 opens, and contacts 21 and 22 close. The signal in the multifrequency transmission at said frequency is received in stage 11 and compared in phase with the output of oscillator 14, still locked to the master station normal transmission. The sine output of the phase discriminator together with a cosine output is fed via contacts 21 and 22 to a selector switch 24. The selector switch is controlled by a connector 28 which in turn is controlled by the break detector 18, such that the two outputs are fed to the one of three phase difference indicators allocated to the slave station giving the multi-frequency transmission. There are thus provided three differential phase indications based on three confocal hyperbolic isophase systems having foci at the master station and at the respective slave station and having lane widths corresponding to the normal frequency of the master station. To overcome phase ambiguities, each phase difference indicator may comprise a cycle integration counter or form part of an automatic chart position indicator.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3035364A GB1086733A (en) | 1964-07-31 | 1964-07-31 | Improvements in or relating to phase comparison radio navigation systems |
NO15909565A NO119995B (en) | 1964-07-31 | 1965-07-26 | |
ES0315965A ES315965A1 (en) | 1964-07-31 | 1965-07-30 | Improvements in or relating to phase comparison radio navigation systems |
DE1965D0047869 DE1276761B (en) | 1964-07-31 | 1965-07-30 | Receiving device for a hyperbola navigation system |
SE1003765A SE343951B (en) | 1964-07-31 | 1965-07-30 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3035364A GB1086733A (en) | 1964-07-31 | 1964-07-31 | Improvements in or relating to phase comparison radio navigation systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1086733A true GB1086733A (en) | 1967-10-11 |
Family
ID=10306307
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3035364A Expired GB1086733A (en) | 1964-07-31 | 1964-07-31 | Improvements in or relating to phase comparison radio navigation systems |
Country Status (5)
Country | Link |
---|---|
DE (1) | DE1276761B (en) |
ES (1) | ES315965A1 (en) |
GB (1) | GB1086733A (en) |
NO (1) | NO119995B (en) |
SE (1) | SE343951B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2261555A1 (en) * | 1971-12-17 | 1973-06-28 | Neo Tec Etude Applic Tech | HYPERBELON LOCATION BY PHASE MEASUREMENT |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1308150A (en) * | 1969-11-10 | 1973-02-21 | Decca Ltd | Receivers for phase comparison radio navigation systems |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US949480A (en) * | 1909-07-12 | 1910-02-15 | Edward S Hodgson Jr | Dental nozzle. |
BE471792A (en) * | 1945-08-23 | |||
GB643381A (en) * | 1947-06-06 | 1950-09-20 | Decca Record Co Ltd | Improvements in or relating to apparatus for determining the maintenance of or departure from a predetermined relationship between two variables |
GB765573A (en) * | 1954-03-08 | 1957-01-09 | Decca Record Co Ltd | Improvements in or relating to radio navigation systems |
-
1964
- 1964-07-31 GB GB3035364A patent/GB1086733A/en not_active Expired
-
1965
- 1965-07-26 NO NO15909565A patent/NO119995B/no unknown
- 1965-07-30 SE SE1003765A patent/SE343951B/xx unknown
- 1965-07-30 ES ES0315965A patent/ES315965A1/en not_active Expired
- 1965-07-30 DE DE1965D0047869 patent/DE1276761B/en not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2261555A1 (en) * | 1971-12-17 | 1973-06-28 | Neo Tec Etude Applic Tech | HYPERBELON LOCATION BY PHASE MEASUREMENT |
Also Published As
Publication number | Publication date |
---|---|
NO119995B (en) | 1970-08-10 |
DE1276761B (en) | 1968-09-05 |
ES315965A1 (en) | 1965-12-01 |
SE343951B (en) | 1972-03-20 |
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