CN110441733A - A kind of digitlization LoranC system module peculiar to vessel - Google Patents
A kind of digitlization LoranC system module peculiar to vessel Download PDFInfo
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- CN110441733A CN110441733A CN201910692426.0A CN201910692426A CN110441733A CN 110441733 A CN110441733 A CN 110441733A CN 201910692426 A CN201910692426 A CN 201910692426A CN 110441733 A CN110441733 A CN 110441733A
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- time service
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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
- G01S5/0205—Details
-
- 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
- G01S5/12—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 by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial
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- 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
The present invention relates to a kind of digitlization LoranC system modules peculiar to vessel, are technically characterized by comprising the steps as follows: and are made of RF front-end circuit and digital signal processing circuit；RF front-end circuit includes sequentially connected antenna input matching module, active filter and LC filter, which is connected with antenna, and the output end of LC filter is connected on digital signal processing circuit；Digital signal processing circuit includes analog-to-digital conversion module, signal processing module, configuration logic module and positioning and time service resolving module, signal processing module is realized to the digital filtering processing of input signal and the signal identification following function of Loran-C signal, configuration logic module is connected with signal processing module, positioning with time service resolving module and external interface circuit, and positioning resolves module with time service and is equipped with positioning time service software.The present invention has rational design, improves the speed of signal processing and the also proper mass of signal, restrained effectively interference and the influence of noise.
Description
Technical field
The invention belongs to bank base long range radio navigation technical field, especially a kind of digitlization LoranC system module peculiar to vessel.
Background technique
The navigation system of long river two, referred to as Loran-C system, is the unique a set of large-scale bank base long distance wireless in China in the world
Electric navigation system is mainly responsible for and provides navigator fix service and other professional tasks for marine vessel activity.
Loran-C system is a kind of medium-long range precision hyperbola radio navigation system.In radionavigation field, it belongs to
Continental rise, low frequency, impulse phase navigation system.Loran-C system is mainly made of ground installation and receiver two parts.Ground at present
Facility have been relatively mature by the construction of many years, but the receiver used on naval vessel generallys use analog signal processing, by
In reasons such as transmission range, noise jammings, there are processing speeds, and influence that is slow, being disturbed with noise leads to greatly poor signal quality etc.
Problem.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, propose a kind of reasonable design, strong antijamming capability and place
Manage fireballing digitlization LoranC system module peculiar to vessel.
The present invention solves its technical problem and adopts the following technical solutions to achieve:
A kind of digitlization LoranC system module peculiar to vessel, is made of RF front-end circuit and digital signal processing circuit；The radio frequency
Front-end circuit includes sequentially connected antenna input matching module, active filter and LC filter, antenna input matching mould
Block input terminal is connected with antenna, and the output end of LC filter is connected on digital signal processing circuit；At the digital signal
Reason circuit includes analog-to-digital conversion module, signal processing module, configuration logic module and positioning and time service resolving module, the modulus
Signal that conversion module receiving radio frequency front end circuit transmits simultaneously is converted into digital data transmission to signal processing module, described
Signal processing module is realized to the digital filtering processing of input signal and the signal identification following function of Loran-C signal, described
Configuration logic module and signal processing module, positioning resolves module with time service and external interface circuit is connected, the positioning and
Time service resolves module and is equipped with positioning time service software, completes Periodic identification, the time difference resolving, location Calculation, interface of Loran-C signal
Output and inside modules control function.
The antenna input matching module is made of capacitance, AC coupled and impedance matching；The active filter
It is sequentially connected and is constituted by programmable amplifier, three-level filtering device and driving tracking circuit；The LC filter is by amplitude regulating circuit
It is connected and composed with LC low-pass filter.
Analog-digital conversion circuit as described is connected and composed by input matching circuit and converter.
The signal processing module is realized using fpga chip.
The configuration logic module includes memory and the positioning of fpga chip and coupled signal processing module
The memory of module is resolved with time service.
The positioning is resolved module with time service and is realized using dsp chip.
The positioning time service software includes three following relatively independent functional modules:
Clock synchronization module: it completes local clock simultaneously clock sync signal synchronous with aerial Loran-C signal and exports to can
Adjust crystal oscillator；
Locating module: by multiple chain of stations searchers carry out that time difference calculating, the time difference are smooth and the time difference it is preferred after determined
Position calculates, and completes more chain of stations positioning functions of LoranC system, and positioning result is transmitted to configuration logic module by data-interface
External interface；
Time service module: synchronous with time service complete by platform selector, bit synchronizer, position extractor, frame synchronizer, frame extractor
It exports at Loran-C system timing function, and by time service result to the external interface of configuration logic module.
The advantages and positive effects of the present invention are:
1, signal processing technology of the present invention using total digitalization, the processing mode combined by FPGA and DSP improve
The speed of signal processing；The automatic conversion of high positioning accuracy and the chain of stations is realized using more chain of stations solving techniques；Using number
Word filtering technique improves the also proper mass of signal, restrained effectively interference and the influence of noise.
2, the present invention is used by reception three LoranC system chain of stations of the system of long river two and the signal of external multiple chain of stations
More chain of stations tracking techniques are positioned in the area of coverage, are provided two-dimentional latitude and longitude coordinates in real time to user, are completed navigator fix function
Energy；Meanwhile the time service information of main in the three LoranC system chain of stations of system of long river two and the first secondary platform are received, with country
UTC time synchronizes, information of uniting when providing a user accurate, completes timing function.
Detailed description of the invention
Fig. 1 is RF front-end circuit functional block diagram of the invention；
Fig. 2 is digital signal processing circuit functional block diagram of the invention；
Fig. 3 is positioning time service software flow block diagram of the invention.
Specific embodiment
The embodiment of the present invention is further described below in conjunction with attached drawing.
A kind of digitlization LoranC system module peculiar to vessel, is connected and composed by RF front-end circuit and digital signal processing circuit, in number
Positioning time service software is installed in word signal processing circuit, navigator fix and timing function are provided.
As shown in Figure 1, RF front-end circuit includes sequentially connected antenna input matching module, active filter and LC filter
Wave device.Antenna input matching module input terminal is connected with antenna (coupler), and the output end of LC filter is connected to digital letter
On number processing circuit.The antenna input matching module is made of capacitance, AC coupled and impedance matching, and capacitance will
Direct current component is blocked in other than channel in antenna coupler output signal, exports feature to adapt to different couplers；It is right simultaneously
AC portion (Loran-C signal) in input signal completes signal transmission by coupling coil, and avoid input signal directly into
Enter late-class circuit bring matching problem.The active filter includes programmable amplifier, three-level filtering device and driving tracking electricity
Road is realized to the first filtering of input signal and enlarging function.The LC filter is by amplitude regulating circuit and LC low-pass filtering
Device is constituted, and the signal of active filter output and the one-stage low-pass wave energy using LC network implementations is received, at channel
The signal of reason makees afterbody noise reduction filtering.The filtered signal of LC is transferred in digital signal processing circuit.
As shown in Fig. 2, digital signal processing circuit includes sequentially connected analog-to-digital conversion module, signal processing module, matches
It sets logic module and positioning and resolves module with time service.The signal that the analog-to-digital conversion module receiving radio frequency front end circuit transmits, will
It is converted to digital data transmission to signal processing module.The signal processing module is realized (in Fig. 2 using fpga chip
FPGA2), realize to the digital filtering processing of input signal and the signal identification following function of Loran-C signal.The configuration is patrolled
Volume module is connected with signal processing module and positioning with time service resolving module, meanwhile, configure logic module also with external interface
Circuit is connected, and configuration logic module includes FPGA1 chip and coupled FPGA2 memory and DSP memory,
FPGA1 chip resolves module (DSP) with time service with signal processing module (FPGA2), positioning and is connected, and configuration logic module is main
Function are as follows: realize serial ports programming FLASH memory function, the serioparallel exchange of LoranC system module external interface and other discrete controls
The switching of signal processed.
The positioning resolves module with time service and realizes (DSP in Fig. 2) using dsp chip, in the present embodiment, DSP core
Piece uses the TMS320C6747DZKBA3 of TI company.The highest arithmetic speed of the chip is up to 300MHz, 128KB internal RAM,
It can satisfy the demand of LoranC system module timing function.
It is resolved in positioning with time service and positioning time service software is installed in module, with the output signal of signal processing module
(useful Loran-C signal and identification pulse signal) is input, completes the Periodic identification of Loran-C signal, the time difference resolves, positioning meter
It calculates, interface output and module other relevant internal controls.As shown in figure 3, positioning time service software includes three following opposite
Independent functional module:
(1) clock synchronization module: completion local clock is synchronous with aerial Loran-C signal, and clock sync signal passes to
On adjustable crystal oscillator.
(2) locating module: by multiple chain of stations searchers progress time difference calculating, the time difference is smooth and the time difference preferably carries out afterwards
Location Calculation completes more chain of stations positioning functions of LoranC system, and positioning result is transmitted to configuration logic module by data-interface
External interface.
(3) time service module: same by platform selector, bit synchronizer, position extractor, frame synchronizer, frame extractor and time service
Step completes Loran-C system timing function, and time service result is transmitted to the external interface of configuration logic module.
The present invention does not address place and is suitable for the prior art.
It is emphasized that embodiment of the present invention be it is illustrative, without being restrictive, therefore packet of the present invention
Include and be not limited to embodiment described in specific embodiment, it is all by those skilled in the art according to the technique and scheme of the present invention
The other embodiments obtained, also belong to the scope of protection of the invention.
Claims (7)
1. a kind of digitlization LoranC system module peculiar to vessel, it is characterised in that: by RF front-end circuit and digital signal processing circuit structure
At；The RF front-end circuit includes sequentially connected antenna input matching module, active filter and LC filter, the antenna
Input matching module input terminal is connected with antenna, and the output end of LC filter is connected on digital signal processing circuit；It is described
Digital signal processing circuit includes analog-to-digital conversion module, signal processing module, configuration logic module and positioning and time service resolving mould
Block, signal that the analog-to-digital conversion module receiving radio frequency front end circuit transmits and be converted into digital data transmission to signal at
Manage module, the signal processing module realize the signal identification of digital filtering processing and Loran-C signal to input signal with
Track function, the configuration logic module are connected with signal processing module, positioning with time service resolving module and external interface circuit,
The positioning resolves module with time service and is equipped with positioning time service software, completes the Periodic identification of Loran-C signal, the time difference resolves, fixed
Position calculates, interface exports and inside modules control function.
2. one kind digitlization LoranC system module peculiar to vessel according to claim 1, it is characterised in that: the antenna input matching
Module is made of capacitance, AC coupled and impedance matching；The active filter by programmable amplifier, three-level filtering device and
Driving tracking circuit is sequentially connected composition；The LC filter is connected and composed by amplitude regulating circuit and LC low-pass filter.
3. one kind digitlization LoranC system module peculiar to vessel according to claim 1 or 2, it is characterised in that: the analog-to-digital conversion electricity
Routing input matching circuit and converter connect and compose.
4. one kind digitlization LoranC system module peculiar to vessel according to claim 1 or 2, it is characterised in that: the signal processing mould
Block is realized using fpga chip.
5. one kind digitlization LoranC system module peculiar to vessel according to claim 1 or 2, it is characterised in that: the configuration logic mould
Block includes the memory of fpga chip and coupled signal processing module and the memory of positioning and time service resolving module.
6. one kind digitlization LoranC system module peculiar to vessel according to claim 1 or 2, it is characterised in that: the positioning and time service
Module is resolved to realize using dsp chip.
7. one kind digitlization LoranC system module peculiar to vessel according to claim 1 or 2, it is characterised in that: the positioning time service is soft
Part includes three following relatively independent functional modules:
Clock synchronization module: it completes local clock simultaneously clock sync signal synchronous with aerial Loran-C signal and exports to adjustable crystalline substance
Vibration；
Locating module: by multiple chain of stations searchers carry out that time difference calculating, the time difference are smooth and the time difference it is preferred after carry out positioning meter
It calculates, completes more chain of stations positioning functions of LoranC system, and positioning result is transmitted to the external of configuration logic module by data-interface
Interface；
Time service module: sieve is synchronously completed by platform selector, bit synchronizer, position extractor, frame synchronizer, frame extractor and time service
Blue C system timing function, and time service result is exported to the external interface of configuration logic module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910692426.0A CN110441733A (en) | 2019-07-30 | 2019-07-30 | A kind of digitlization LoranC system module peculiar to vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910692426.0A CN110441733A (en) | 2019-07-30 | 2019-07-30 | A kind of digitlization LoranC system module peculiar to vessel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111474564A (en) * | 2020-04-13 | 2020-07-31 | 中国科学院国家授时中心 | A Roland-C navigation signal simulator and method |
| CN113447963A (en) * | 2021-06-24 | 2021-09-28 | 中国船舶重工集团公司第七0七研究所 | Rowland C positioning and time service software receiver and processing method thereof |
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| CN102809751A (en) * | 2012-08-14 | 2012-12-05 | 中国科学院国家授时中心 | CAPS/Big Dipper bimodule receiver |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111474564A (en) * | 2020-04-13 | 2020-07-31 | 中国科学院国家授时中心 | A Roland-C navigation signal simulator and method |
| CN111474564B (en) * | 2020-04-13 | 2022-06-07 | 中国科学院国家授时中心 | A Roland-C navigation signal simulator and method |
| CN113447963A (en) * | 2021-06-24 | 2021-09-28 | 中国船舶重工集团公司第七0七研究所 | Rowland C positioning and time service software receiver and processing method thereof |
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