JPS6079282A - Loran c receiver - Google Patents
Loran c receiverInfo
- Publication number
- JPS6079282A JPS6079282A JP18780483A JP18780483A JPS6079282A JP S6079282 A JPS6079282 A JP S6079282A JP 18780483 A JP18780483 A JP 18780483A JP 18780483 A JP18780483 A JP 18780483A JP S6079282 A JPS6079282 A JP S6079282A
- Authority
- JP
- Japan
- Prior art keywords
- shift register
- loran
- bit
- received signal
- fed
- 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.)
- Pending
Links
- 101700038984 csgA Proteins 0.000 abstract 2
- 238000001514 detection method Methods 0.000 abstract 2
- 238000005070 sampling Methods 0.000 abstract 2
- 230000002411 adverse Effects 0.000 abstract 1
- 239000000969 carrier Substances 0.000 abstract 1
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
- G01S1/24—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 pulses or equivalent modulations on carrier waves and the transit times being compared by measuring the difference in arrival time of a significant part of the modulations, e.g. LORAN systems
- G01S1/245—Details of receivers cooperating therewith, e.g. determining positive zero crossing of third cycle in LORAN-C
Abstract
PURPOSE:To enable the detection of a specific cycle of a carrier accurately and for a short time even under an adverse condition in the S/N ratio of a loran C signal by including an envelope detection means, a reference envelope memory means and an envelope collimation means for determining the specific cycle. CONSTITUTION:A high frequency amplifier 2 amplifies a received signal D1 containing a loran C signal received with a receiving antenna 1 and the received signal amplified is fed to a limiter circuit 3, which shapes the received signal amplified into a square wave to be converted into a digital signal of 1 or 0. A shift register 4 is a shift register of k bit (e.g. 160 bit) samples a received signal data D2 digitized as fed from the limiter circuit 3 following a sampling pulse PS fed from a counter 8. A latch circuit 5 is provided to latch each bit output of the shift register 4 and latches a data of 160 bit by a divided pulse D1 of the counter 8 at the time when the sampling of a loran pulse is ended with the shift register 4.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18780483A JPS6079282A (en) | 1983-10-07 | 1983-10-07 | Loran c receiver |
| US06/657,662 US4633260A (en) | 1983-10-07 | 1984-10-04 | Loran-C signal receiving apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18780483A JPS6079282A (en) | 1983-10-07 | 1983-10-07 | Loran c receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6079282A true JPS6079282A (en) | 1985-05-07 |
Family
ID=16212526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18780483A Pending JPS6079282A (en) | 1983-10-07 | 1983-10-07 | Loran c receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6079282A (en) |
-
1983
- 1983-10-07 JP JP18780483A patent/JPS6079282A/en active Pending
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