GB594887A - Improvement in radio position finding - Google Patents
Improvement in radio position findingInfo
- Publication number
- GB594887A GB594887A GB18417/44A GB1841744A GB594887A GB 594887 A GB594887 A GB 594887A GB 18417/44 A GB18417/44 A GB 18417/44A GB 1841744 A GB1841744 A GB 1841744A GB 594887 A GB594887 A GB 594887A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- mobile station
- fixed stations
- distances
- 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
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/14—Determining absolute distances from a plurality of spaced points of known location
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
594,887. Radio navigation. MAR CONI'S WIRELESS TELEGRAPH CO., Ltd. Sept. 26, 1944, No. 18417.Convention date, Nov. 2, 1942. [Class 40 (v)] For determining the position of a mobile station by measuring the distances from each of a plurality of fixed stations 6, 106, the mobile station transmits to each of the fixed stations a frequency-modulated signal (of mean frequency f) which is transmitted back from the fixed stations with a frequency change F<1> different for each station. The mobile station also transmits directly to its receivers 17, 1017 the frequencies F+f and F<1>+f similarly frequency-modulated so that heat-frequency detectors 19, 1019 produce direct voltages proportional to the distances. In the system shown, the map position of the mobile station is shown on the screen of a two-gun cathode-ray tube 31. Alternating current from a source 45 is fed in quadrature to the pairs of deflecting plates of both guns producing circular traces the centres of Which are adjusted by control circuits 43, 37 to the map positions 59, 61 of the fixed stations. The radii of the circular traces are made proportional to the distances by modulating the outputs of source 45 with the voltages from circuits 19, 1019 so that one of the intersections (i3 of the traces will give the map position of the mobile stationTo resolve the ambiguity, if necessary, a third trace corresponding to a third fixed station may be added.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US594887XA | 1942-11-02 | 1942-11-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB594887A true GB594887A (en) | 1947-11-21 |
Family
ID=22023275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18417/44A Expired GB594887A (en) | 1942-11-02 | 1944-09-26 | Improvement in radio position finding |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB594887A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2597712A (en) * | 2020-07-30 | 2022-02-09 | Entotem Ltd | Specifying the location of a mobile transceiver |
| US11665663B2 (en) | 2020-07-29 | 2023-05-30 | Entotem Limited | Transmitting data over a radio network |
-
1944
- 1944-09-26 GB GB18417/44A patent/GB594887A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11665663B2 (en) | 2020-07-29 | 2023-05-30 | Entotem Limited | Transmitting data over a radio network |
| GB2597712A (en) * | 2020-07-30 | 2022-02-09 | Entotem Ltd | Specifying the location of a mobile transceiver |
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