CN205562813U - Satellite navigation signal testing system based on big dipper intermediate frequency signal gathers - Google Patents
Satellite navigation signal testing system based on big dipper intermediate frequency signal gathers Download PDFInfo
- Publication number
- CN205562813U CN205562813U CN201620113602.2U CN201620113602U CN205562813U CN 205562813 U CN205562813 U CN 205562813U CN 201620113602 U CN201620113602 U CN 201620113602U CN 205562813 U CN205562813 U CN 205562813U
- Authority
- CN
- China
- Prior art keywords
- big dipper
- signal
- module
- satellite navigation
- intermediate frequency
- 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 - Fee Related
Links
Landscapes
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The utility model discloses a satellite navigation signal testing system based on big dipper intermediate frequency signal gathers, this system include big dipper intermediate frequency signal collector and the big dipper baseband signal treater that carries out data transmission each other, and wherein big dipper intermediate frequency signal collector is including the radio frequency front end module, radio frequency front end data processing module, AD sampling module and the data transmission module that connect gradually. According to the utility model discloses a miniature navigation test system can carry out signal acquisition to big dipper radiofrequency signal to convert the signal source that digital intermediate frequency data flow was tested as satellite navigation into, with the processing of resolving of here signal source input to subsequent big dipper baseband signal treater information of carrying on, the test who from this is the processing of realization beidou signal provides the support of hardware device.
Description
Technical field
This utility model belongs to field of satellite navigation, believes based on Big Dipper intermediate frequency more particularly, to one
Number gather satellite navigation test system.
Background technology
Technical field of satellite navigation is applied increasingly extensive at present, and China also leads stepping up to carry out big-dipper satellite
The building-up work of boat system, has formed the Big Dipper regional satellite of 5GEO+3IGSO+4MEO
Navigation system constellation, will expand into the Satellite Global satellite navigation for having about 30 to the year two thousand twenty
System.For market and all types of user, the terminal unit of the satellite navigation system such as GPS, the Big Dipper
Application technology is one of key technology.
Satellite navigation receiver is mostly based on digital processing technology special chip (ASIC) and is used at present
The fast microprocessor of computation and constitute, its shortcoming is that algorithm is fixed and is not easy to change hardware
Framework, but the demand that interface applications is received machine in different occasions and different application platforms by user is the most different,
It is changed it is thus desirable to receiver to be carried out functional structure thus meets navigation more flexibly sufficiently
Signal testing demand.
Utility model content
For disadvantages described above or the Improvement requirement of prior art, this utility model provides a kind of based on north
The satellite navigation signals test system that bucket intermediate-freuqncy signal gathers, its object is to propose one particularly suitable
The test system of the Big Dipper intermediate-freuqncy signal of Yu Haiyang environment, thus for different types of north of ocean application
Bucket receiver signal processes the system hardware platform providing test.
For achieving the above object, according to an aspect of the present utility model, it is provided that a kind of based on the Big Dipper
The satellite navigation test system that intermediate-freuqncy signal gathers, it is characterised in that this system includes mutually counting
According to Big Dipper intermediate-freuqncy signal harvester and the Big Dipper baseband signal processor of transmission, wherein Big Dipper intermediate frequency letter
RF front-end module that number harvester includes being sequentially connected with, radio-frequency front-end data processing module, A/D sampling
Module and data transmission module.
Further, described RF front-end module includes Beidou antenna, the two-stage low noise being sequentially connected with
Amplifier and band filter.
Further, described radio-frequency front-end data processing module includes quadrature demodulator and coupled
Combine for its RF local oscillator frequency providing oscillation source.
In general, by the contemplated above technical scheme of this utility model compared with prior art,
It is possible to obtain following beneficial effect: Big Dipper radiofrequency signal can be carried out signals collecting, and change
The signal source tested as satellite navigation for digital intermediate frequency data stream, by the input of this signal source to follow-up
Big Dipper baseband signal processor carries out the resolving of information and processes, and is achieved in the test of Big Dipper signal processing
Work.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the satellite navigation test system realized according to this utility model;
Fig. 2 is that the Big Dipper intermediate-freuqncy signal in the satellite navigation test system according to this utility model realization is adopted
The modular structure schematic diagram of storage;
Fig. 3 is in the Big Dipper in the satellite navigation test system according to this utility model embodiment one realization
Frequently the module details structural representation of signal picker;
Fig. 4 is the Big Dipper base in the satellite navigation test system according to this utility model embodiment one realization
The modular structure schematic diagram of band signal processor.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with
Drawings and Examples, are further elaborated to this utility model.Should be appreciated that this place is retouched
The specific embodiment stated, only in order to explain this utility model, is not used to limit this utility model.This
Outward, if technical characteristic involved in each embodiment of this utility model disclosed below that
The conflict of not constituting between this just can be mutually combined.
The test system realized according to this utility model, mainly includes following two parts: such as Fig. 1 institute
Showing, the navigation test system that this utility model relates to includes the Big Dipper intermediate frequency letter mutually carried out data transmission
Number harvester and Big Dipper baseband signal processor.
As in figure 2 it is shown, be the system group of the Big Dipper intermediate-freuqncy signal harvester realized according to this utility model
Becoming schematic diagram, wherein Big Dipper intermediate-freuqncy signal harvester mainly completes the high speed acquisition to Big Dipper radiofrequency signal
With process, it specifically includes interconnective RF radio-frequency front-end, RF radio-frequency front-end data process, A/D
Module and data transmission module, A/D module completes sampling and the quantization of data, data transmission module master
The agreement of data to be provided transmission and interface.
Embodiment one
Part as shown in Figure 3, is the detailed schematic of concrete Big Dipper intermediate-freuqncy signal acquisition module,
The Big Dipper intermediate-freuqncy signal harvester realized according to the present embodiment, this harvester mainly includes such as lower part:
1, RF front-end module
The design of RF front-end module mainly includes the Beidou II B1 antenna gathering signal, and coupled
Two-stage front-end low-noise put LNA, wherein front-end low-noise put chip select model is the core of HMC476SC70
Sheet, accesses one-level radio frequency band filter (SAW filter SAW) after two-stage LNA exports, actual
In test, every grade of LNA reaches the gain of 15dB, and two-stage LNA associating gain about 30dB is actual logical
Road counts two-stage SAW Insertion Loss, final stage PI type matching attenuation, circuit and joint Insertion Loss etc., is total to
Counting the loss of about 10dB, the cascade of actual two-stage LNA obtains the gain of 20dB.
2, RF front end data processes
Wherein this RF front end data processes and selects chip AD8347 as primary module, and AD8347 is a
Single-chip, broadband 2.7GHz quadrature demodulator, and use concrete model to provide for it for SI4133
RF local oscillator frequency combines chip, and this RF local oscillator frequency is combined chip and comprised 3 road PLL phase-locked loops, every road PLL
It is made up of PD phase detectors, LF loop filter, VCO voltage controlled oscillator and programmable frequency divider.
Using 10MHz 1PPM temperature compensating crystal oscillator as reference frequency source, radio frequency output is connected pair net by LC
Network matches load, and the scope of the external inductors of the first radio-frequency channel is 0~4.6nH, and the second radio frequency leads to
The scope of the external inductors in road is 0.3nH~6.2nH.
3, A/D sampling module
Wherein A/D sampling module is arranged at after RF front end data processes and carries out data sampling, actual plate
Upper AD uses the model of Analog Device company to be AD9233-125 chip, be a single-chip,
12,125MSPS analog-digital converter ADC, use 1.8V single supply to power, a built-in high property
Can sample/hold amplifier SHA and sheet internal reference voltage source, high sampling rate up to 125MHz, 12
Resolution, analog bandwidth reaches as high as 650MHz, can do the direct bandpass sampling of radio frequency, uses difference to drive
Time dynamic, AD9233 is capable of optimum performance.Analog if signal enters after electric capacity AC coupled and puts
Big passage.
4, data transmission module
Wherein data transmission module includes that the front-end processing of data and interface process, wherein front-end processing
It is that the data transmitted through A/D sampling module are transmitted to the FPGA as data transmission module, needs here
It should be noted that the clock interface of FPGA, its internal PLL input needs special clock pin to input,
Transmit after wherein the data of FPGA being processed and prepare data are processed to transmit it to USB2.0 interface
Big Dipper baseband signal processor, wherein USB2.0 interface uses CY7C68013-56 interface chip.
The most as shown in Figure 4, the module group of the Big Dipper baseband signal processor for realizing according to the present invention
Becoming structural representation, wherein, Big Dipper baseband signal processor passes through capture from intermediate frequency signal picker
Module gathers corresponding data, and by the signal input tracking module of capture, this tracking module is main
Including code tracking loop and carrier tracking loop, Big Dipper baseband signal processor is mainly used in the above-mentioned Big Dipper
Frequently the signal that comes of signal picker conveying processes, wherein and this processor mainly completes data
Process, the initialization of each passage (each passage refers to the multi-satellite signalling channel received), each logical
Road is advanced, instant and the reading of lag correlation value and the loop of storage, carrier tracking loop and code tracking loop
Controlling and performance test is so that it is guaranteed that the reliability that processes of data, the TIC moment observes the reading of data and deposits
Storage, carrier phase auxiliary pseudorange smoothing processes, and follows the tracks of Doppler's kalman Filtering Processing, signal frame number
According to reading and navigation message resolve, satellite fix resolve and speed solves, the framing of serial port protocol and
Solve the various data receivers such as frame and process the various functions such as calculating, the most above-mentioned Big Dipper base band signal process
The each module of device is integrated in a DSP or programmable logic chip, by with power supply, logic journey
The cooperation of sequence completes above-mentioned process.
Wherein after Big Dipper intermediate-freuqncy signal harvester collection completes signal, use at Big Dipper baseband signal
Reason device carries out the process of signal, and the procedure extraction that thus data process goes out the test data letter of satellite navigation
Breath carries out testing information processing, and this data handling procedure uses the data mistake identical with prior art
Journey and select data processing chip, does not repeats them here the detailed process of data.
As it will be easily appreciated by one skilled in the art that and the foregoing is only preferred embodiment of the present utility model
, not in order to limit this utility model, all made within spirit of the present utility model and principle
Any amendment, equivalent and improvement etc., within should be included in protection domain of the present utility model.
Claims (3)
1. the satellite navigation signals test system gathered based on Big Dipper intermediate-freuqncy signal, it is characterised in that
This system includes Big Dipper intermediate-freuqncy signal harvester and the Big Dipper baseband signal processor being electrically connected to each other,
At RF front-end module that wherein Big Dipper intermediate-freuqncy signal harvester includes being sequentially connected with, radio-frequency front-end data
Reason module, A/D sampling module and data transmission module.
2. the satellite navigation signals test gathered based on Big Dipper intermediate-freuqncy signal as claimed in claim 1 is
System, it is characterised in that described RF front-end module includes Beidou antenna, the two-stage low noise being sequentially connected with
Acoustic amplifier and band filter.
3. the satellite navigation signals test gathered based on Big Dipper intermediate-freuqncy signal as claimed in claim 2 is
System, it is characterised in that described radio-frequency front-end data processing module include quadrature demodulator and with its phase
It is linked as its RF local oscillator that oscillation source is provided frequency to combine.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201620113602.2U CN205562813U (en) | 2016-02-04 | 2016-02-04 | Satellite navigation signal testing system based on big dipper intermediate frequency signal gathers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201620113602.2U CN205562813U (en) | 2016-02-04 | 2016-02-04 | Satellite navigation signal testing system based on big dipper intermediate frequency signal gathers |
Publications (1)
Publication Number | Publication Date |
---|---|
CN205562813U true CN205562813U (en) | 2016-09-07 |
Family
ID=56820898
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201620113602.2U Expired - Fee Related CN205562813U (en) | 2016-02-04 | 2016-02-04 | Satellite navigation signal testing system based on big dipper intermediate frequency signal gathers |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN205562813U (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107064971A (en) * | 2017-04-12 | 2017-08-18 | 贵州北斗空间信息技术有限公司 | A kind of Big Dipper satellite signal receives display circuit |
CN109257020A (en) * | 2018-08-14 | 2019-01-22 | 华东师范大学 | A kind of experimental circuit can be realized faint amplitude-modulated signal demodulation |
CN118294990A (en) * | 2024-06-05 | 2024-07-05 | 杭州芯云半导体技术有限公司 | Test system and test method for navigation chip |
-
2016
- 2016-02-04 CN CN201620113602.2U patent/CN205562813U/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107064971A (en) * | 2017-04-12 | 2017-08-18 | 贵州北斗空间信息技术有限公司 | A kind of Big Dipper satellite signal receives display circuit |
CN109257020A (en) * | 2018-08-14 | 2019-01-22 | 华东师范大学 | A kind of experimental circuit can be realized faint amplitude-modulated signal demodulation |
CN118294990A (en) * | 2024-06-05 | 2024-07-05 | 杭州芯云半导体技术有限公司 | Test system and test method for navigation chip |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN101833100B (en) | Method for constructing fully-digital GNSS compatible navigation receiver | |
CN103412317A (en) | Radio-frequency circuit structure for achieving function of converting GNSS satellite signals into baseband signals | |
CN108594279B (en) | Device suitable for monitoring and receiving multi-system navigation signals | |
CN104104400B (en) | The spaceborne ADS-B Signal reception machine of highly sensitive | |
CN101075814B (en) | Digital receiver system based on special digital medium-frequency structure | |
CN204794979U (en) | Wireless receiver circuit | |
CN205562813U (en) | Satellite navigation signal testing system based on big dipper intermediate frequency signal gathers | |
CN106100658B (en) | Spaceborne S band Dual Channels observing and controlling receiver | |
CN103760575A (en) | Anti-interference Beidou satellite navigation receiver board card and receiver terminal thereof | |
CN109799516A (en) | A kind of device for the positioning of GNSS Interference Detection | |
CN101783701A (en) | Radio-frequency receiver of Beidou I navigation system | |
CN102141774A (en) | Quick time service device and method for Beidou watch | |
CN103490784A (en) | Two-channel satellite navigation anti-interference A/D chip | |
CN107037457A (en) | A kind of satellite-based enhancing receiver based on Inmarsat systems | |
CN212694060U (en) | Satellite navigation receiving board card, device and system | |
CN202182942U (en) | Global navigation system double-channel radio frequency receiver with low power consumption | |
CN107942351A (en) | A kind of Big Dipper RDSS radio frequency transmissions detection devices | |
CN111830541A (en) | Satellite navigation receiving board card, device and system | |
CN203535230U (en) | Radio frequency circuit structure capable of converting GNSS satellite signal to baseband signal | |
CN111812686B (en) | Navigation signal receiver and clock distribution method thereof | |
CN207124623U (en) | Wireless signal receiver and system | |
CN201048372Y (en) | Special digital intermediate frequency structure based digital receiver system | |
CN102540203A (en) | Radio frequency receiver of number-one Beidou satellite navigation system | |
CN106291624A (en) | The radio-frequency transmitter of No. two satellite navigation system channel structures of the Big Dipper | |
CN103647563B (en) | Anti-Image interference receiver |
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: 20160907 Termination date: 20220204 |