CN205656314U - Multimode satellite positioning system - Google Patents
Multimode satellite positioning system Download PDFInfo
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- CN205656314U CN205656314U CN201620231237.5U CN201620231237U CN205656314U CN 205656314 U CN205656314 U CN 205656314U CN 201620231237 U CN201620231237 U CN 201620231237U CN 205656314 U CN205656314 U CN 205656314U
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- acoustic wave
- signal
- surface acoustic
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Abstract
The utility model discloses a multimode satellite positioning system, including being used for receiving the antenna of satellite positioning signal, to the received signal carry on the signal amplification low noise amplification module, be used for carrying out surface acoustic wave filter module that filtering handled and advancing line location's orientation module according to the satellite signal after handling the signal after enlargeing, orientation module and surface acoustic wave filter module are connected, surface acoustic wave filter module is connected with low noise amplification module, low noise amplification module is connected with orientation module. The utility model discloses multimode satellite positioning system's orientation module circuit is functional, supports big dipper satellite positioning system (BDS) and global satellite positioning system (GPS) simultaneously, can realize well the real -time location and tracking of vehicle.
Description
Technical field
This utility model relates to the research field of satellite fix, particularly to a kind of multi-mode satellite alignment system.
Background technology
Global position system develops into now, although positioning precision is greatly improved, but car working application proposes the highest requirement to positional precision, improves positioning precision imperative to improve Consumer's Experience.The development of BDS is very swift and violent, in March, 2015, a new generation's big-dipper satellite successful launch, opens the new journey realizing the networking of the year two thousand twenty whole world, and Big Dipper development strides into into " 3.0 epoch ", and Beidou satellite navigation system carries out the rhythm of whole world networking and accelerating.Same, Galileo system the most progressively comes into operation, and satellite fix, from traditional GPS epoch, enters into multi-mode satellite location time and changes.Owing to multi-mode satellite alignment system to be got well more than single GPS at the aspect such as availability, anti-interference, making multimode rake receiver greatly exceed single GPS in cost performance, compatible multiple satellite fix pattern is the trend of vehicle positioning future development.
Utility model content
Main purpose of the present utility model is that the shortcoming overcoming prior art is with not enough, it is provided that a kind of multi-mode satellite alignment system.
In order to achieve the above object, the present invention is by the following technical solutions:
A kind of multi-mode satellite alignment system of the present utility model, including the antenna for receiving satellite positioning signal, the framing signal received is carried out the low noise amplification module of signal amplification, for the surface acoustic wave filtration module being filtered processing to the signal after amplifying and the locating module positioned according to the satellite-signal after processing, described locating module is connected with surface acoustic wave filtration module, described surface acoustic wave filtration module is connected with low noise amplification module, and described low noise amplification module is connected with locating module.
As preferred technical scheme, described locating module uses XN647-8 locating module.
As preferred technical scheme, described low noise amplification module uses XN114 low noise amplification chip.
As preferred technical scheme, described surface acoustic wave filtration module uses EFCH1575TDB1 surface acoustic wave filtering chip.
As preferred technical scheme, described antenna uses the antenna of compatible BDS/GPS.
As preferred technical scheme, the specification of described BDS/GPS antenna is 25mm × 25mm × 4mm.
As preferred technical scheme, also include that ADC transducer, described ADC transducer are connected with locating module, for the location information received being converted into the output of NMEA agreement.
This utility model compared with prior art, has the advantage that and beneficial effect:
1, the locating module circuit performance of multi-mode satellite alignment system of the present utility model is good, well vehicle can be realized real time location tracking.
2, the most compatible BDS and GPS of multi-mode satellite alignment system of the present utility model.
3, the antenna performance of multi-mode satellite alignment system of the present utility model is good, and the actual signal strength values height receiving satellite of complete machine, close to theoretical value.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of this utility model multi-mode satellite alignment system；
Fig. 2 is this utility model multi-mode satellite locating module circuit theory diagrams；
Fig. 3 is this utility model low noise amplification and SAW filter circuit theory diagrams；
Fig. 4 (a)-Fig. 4 (d) is respectively antenna at 4 the orientation complete machines in outdoor outdoor occasion east, south, west, north actual reception satellite signal strength value schematic diagram.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, this utility model is described in further detail, but embodiment of the present utility model is not limited to this.
Embodiment
As shown in Figure 1, a kind of multi-mode satellite alignment system of the present embodiment, including the antenna for receiving satellite positioning signal, the framing signal received is carried out the low noise amplification module of signal amplification, for the surface acoustic wave filtration module being filtered processing to the signal after amplifying and the locating module positioned according to the satellite-signal after processing, described locating module is connected with surface acoustic wave filtration module, described surface acoustic wave filtration module is connected with low noise amplification module, and described low noise amplification module is connected with locating module.
XN647-8 is the monolithic GNSS satellite navigation receiver module of a high-performance, low cost, has the features such as low-power consumption, high sensitivity, small size, it is possible to parallel reception multimodal satellite navigation signal.XN647-8 uses highly integrated system schema, rf receiver unit, baseband processing unit, temperature compensating crystal oscillator (TCXO/0.5ppm), low pressure difference linear voltage regulator (LDO) and part passive device (resistance, electric capacity, inductance) are internally integrated it, it is only necessary to little external resource just can be integrated in the application scheme of mobile terminal and handheld device.
XN647-8 has stronger weak signal capture ability and shorter primary positioning time, the correlator signal parameter search engine of base band internal proprietary can quickly capture usable satellite, and weak signal can be received, small-signal can be tracked under rugged environment and position by advanced tracking engine.
According to XN647-8 chip operation instruction and circuit requirements, Design Orientation modular circuit schematic diagram is as shown in Figure 2.Its main feature: miniaturization multimode GNSS receiver module, supports multiple global position system；Highly sensitive, cold start-up sensitivity is-148dBm, and tracking sensitivity is-165dBm；The startup time is fast, and cold start-up needs 29s, thermal starting to have only to 1s；Positioning precision reaches 2.5m；Programming is convenient, supports outside SPI flash memory data record.
Described low noise amplification module uses XN114 low noise amplification chip；Described surface acoustic wave filtration module uses EFCH1575TDB1 surface acoustic wave filtering chip.
XN114 is a the low noise amplifier chip being applied to receiver.Being designed with BiCMOS technique, have the characteristic of high-gain low-noise, under conditions of gain is 18dB, noise coefficient has reached 0.8dB.This chip application, in receiver front end, can be effectively improved the receiving sensitivity of receiver, expands the range of application of receiver.XN114 can be operated under+1.8V～+3.3V supply voltage, consumes electric current only 5.5mA, consumes electric current in the shutdown mode less than 10uA.Encapsulation uses 6-pin LGA form, and size is 1.5mm 1.0mm 0.75mm.Recommended work condition: supply voltage: 1.8V～3.3V operating temperature :-40 DEG C～85 DEG C.According to circuit requirements and chip operation instruction, designing low noise amplification harmony table filter circuit, its circuit theory diagrams are as shown in Figure 3.
The antenna supporting BDS/GPS refers to by accepting satellite-signal, thus carries out the used antenna that positions or navigate.Civil signal mid frequency open for BDS be the open civil signal L1 mid frequency of 1561.098MHz, GPS be 1575.42MHz, signal, typically at about-166dBm, belongs to weak signal.BDS/GPS antenna has four important parameters: gain (Gain), standing wave (VSWR), noise coefficient (Noise figure), axle ratio (Axial ratio).
Support the antenna measurement instrument of BDS/GPS: Network Analyzer (HP8752A), measuring process is as follows: 1) use calibrating device that Network Analyzer is carried out single port correction；2) antenna to be measured is connected on Network Analyzer；3) reflection coefficient (S11) needed for measuring, the relevant parameter such as return loss (Return Loss).
The antenna specification of compatible BDS/GPS is 25mmX25mmX4mm, related data is obtained by measuring process, Fig. 4 (a)-Fig. 4 (d) is respectively antenna in 4 the orientation complete machines in outdoor outdoor occasion east, south, west, north actual reception satellite signal strength value, antenna performance is good as known in the figure, and complete machine actual reception satellite signal strength value is close to theoretical value.
Utilize seizure sensitivity and tracking sensitivity that the positioning performance of multi-mode satellite alignment system is tested.Positioning chip, by supporting that the antenna of BDS/GPS receives satellite system signal, through filtering and amplifying circuit, delivers to XN647-8 monolithic GNSS satellite navigation receiver module the satellite-signal received, and through ADC conversion and internal arithmetic, is converted into the output of NMEA agreement.
Above-described embodiment is this utility model preferably embodiment; but embodiment of the present utility model is also not restricted to the described embodiments; other any without departing from the change made under spirit of the present utility model and principle, modify, substitute, combine, simplify; all should be the substitute mode of equivalence, within being included in protection domain of the present utility model.
Claims (7)
1. a multi-mode satellite alignment system, it is characterised in that include the sky for receiving satellite positioning signal
Line, carries out the low noise amplification module of signal amplification, for the letter after amplifying to the framing signal received
Number it is filtered the surface acoustic wave filtration module that processes and according to determining that the satellite-signal after processing carries out positioning
Position module, described locating module is connected with surface acoustic wave filtration module, and described surface acoustic wave filtration module is with low
Noise amplification module connects, and described low noise amplification module is connected with locating module.
Multi-mode satellite alignment system the most according to claim 1, it is characterised in that described locating module
Use XN647-8 locating module.
Multi-mode satellite alignment system the most according to claim 1, it is characterised in that described low noise is put
Big module uses XN114 low noise amplification chip.
Multi-mode satellite alignment system the most according to claim 1, it is characterised in that described surface acoustic wave
Filtration module uses EFCH1575TDB1 surface acoustic wave filtering chip.
Multi-mode satellite alignment system the most according to claim 1, it is characterised in that described antenna uses
The antenna of compatible BDS/GPS.
Multi-mode satellite alignment system the most according to claim 5, it is characterised in that described BDS/GPS
The specification of antenna is 25mm × 25mm × 4mm.
Multi-mode satellite alignment system the most according to claim 1, it is characterised in that also include ADC
Transducer, described ADC transducer is connected with locating module, for the location information received being converted into
NMEA agreement exports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620231237.5U CN205656314U (en) | 2016-03-24 | 2016-03-24 | Multimode satellite positioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620231237.5U CN205656314U (en) | 2016-03-24 | 2016-03-24 | Multimode satellite positioning system |
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| Publication Number | Publication Date |
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| CN205656314U true CN205656314U (en) | 2016-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620231237.5U Expired - Fee Related CN205656314U (en) | 2016-03-24 | 2016-03-24 | Multimode satellite positioning system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108459297A (en) * | 2017-12-29 | 2018-08-28 | 北京日月九天科技有限公司 | A kind of northern instrument of precisely finger that can quickly find direct north |
-
2016
- 2016-03-24 CN CN201620231237.5U patent/CN205656314U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108459297A (en) * | 2017-12-29 | 2018-08-28 | 北京日月九天科技有限公司 | A kind of northern instrument of precisely finger that can quickly find direct north |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161019 Termination date: 20210324 |