CN106842255A - A kind of configurable multisystem satellite navigation method of reseptance - Google Patents
A kind of configurable multisystem satellite navigation method of reseptance Download PDFInfo
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- CN106842255A CN106842255A CN201510885619.XA CN201510885619A CN106842255A CN 106842255 A CN106842255 A CN 106842255A CN 201510885619 A CN201510885619 A CN 201510885619A CN 106842255 A CN106842255 A CN 106842255A
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- satellite navigation
- reseptance
- configurable
- signal
- navigation method
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- 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
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/35—Constructional details or hardware or software details of the signal processing chain
- G01S19/37—Hardware or software details of the signal processing chain
-
- 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
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/33—Multimode operation in different systems which transmit time stamped messages, e.g. GPS/GLONASS
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The invention belongs to the method for reseptance that navigates, and in particular to a kind of configurable multisystem satellite navigation method of reseptance.A kind of configurable multisystem satellite navigation method of reseptance, comprises the steps：Step one：Data receiver, external signal, step 2 are received by two-way antenna：Radio frequency processing, the signal that antenna is received first passes around the conversion of settable down coversion, is then amplified filtering；Step 3：AD conversion, AD samplings are carried out to the signal after radio frequency processing；Step 4：Navigation is processed, and the data to AD samplings carry out numeral pretreatment first, are then caught successively, tracked and positioning calculation, is resolved the data for completing and is exported to outside.Effect of the invention is：Multiple satellite navigation systems use same radio-frequency channel, and without separately designing radio-frequency channel, reducing component uses, and reduces hardware cost, reduces circuit area；In addition, pressing application demand, by software merit rating, the treatment of different satellite navigation system signals is capable of achieving, flexibility is very strong.
Description
Technical field
The invention belongs to the method for reseptance that navigates, and in particular to a kind of configurable multisystem satellite navigation method of reseptance.
Background technology
Satellite navigation system (GPS, GLONASS, Big Dipper etc.) is a kind of high-precision navigation positioning system,
Satellite navigation receiver receives the signal of satellite navigation system, fixed by base band demodulating, despreading, and navigation
After the calculating treatment of position, the information such as longitude, latitude, height, speed and time are may provide the user with,
Military field and civil area are widely applied.
At present, satellite navigation system main in the world has GPS, GLOANSS, the Big Dipper, GALILEO.
Because each satellite navigation system is using the frequency and pseudo noise code of feature, it is usually the case that, it is each
The hardware for planting navigation satellites receiver does not possess compatibility, it is necessary to targeted design antenna, radio circuit.
But, a kind of receiver application of satellite-signal of a single treatment is fewer and feweri, and reason is single satellite navigation
System visible satellite number will not be too many, positioning precision may be caused not high or a small number of period delocalizations situation；
With being on the increase for satellite navigation system, the satellite of day distribution in the air is significantly increased, so multi-mode satellite connects
The extensive use in practice of receipts machine, on the one hand avoids the limitation of single satellite navigation system application, on the one hand
Improve availability, the reliability of receiver navigator fix.But multi-satellite navigation system is received, just mean
Multisystem signal transacting, while mean that the complexity of hardware circuit design is greatly improved, including radio frequency is logical
The increase in road, the increase of circuit area.
The content of the invention
A kind of defect of the present invention for prior art, there is provided configurable multisystem satellite navigation method of reseptance.
What the present invention was realized in：A kind of configurable multisystem satellite navigation method of reseptance, including following steps
Suddenly：
Step one：Data receiver
External signal is received by two-way antenna,
Step 2：Radio frequency processing
The signal that antenna is received first passes around the conversion of settable down coversion, is then amplified filtering；
Step 3：AD conversion
AD samplings are carried out to the signal after radio frequency processing；
Step 4：Navigation is processed
Data to AD samplings carry out numeral pretreatment first, then caught successively, tracked and are positioned
Resolve, resolve the data for completing and exported to outside.
A kind of configurable multisystem satellite navigation method of reseptance as described above, wherein, in described step four,
In described step two, the target of down coversion is frequency range, and the frequency range covers the frequency range of satellite earth antenna.
A kind of configurable multisystem satellite navigation method of reseptance as described above, wherein, in described step four,
Numeral pretreatment includes：Digital Down Convert, digital filtering, numeral are down-sampled；Wherein digital down-sampled use
CIC filtering extractions or HB filtering extractions.
A kind of configurable multisystem satellite navigation method of reseptance as described above, wherein, in described step four,
The pseudo noise code that capture and tracking step are used is matched with receiver mode.
Effect of the invention is：Multiple satellite navigation systems use same radio-frequency channel, and without setting respectively
Meter radio-frequency channel, reduces component and uses, and reduces hardware cost, reduces circuit area；In addition,
By application demand, by software merit rating, the treatment of different satellite navigation system signals is capable of achieving, flexibility is very
By force.
Brief description of the drawings
Fig. 1 is the schematic diagram of conventional satellite navigation method of reseptance signal transmission relation；
Fig. 2 is the schematic diagram of configurable multisystem satellite navigation method of reseptance signal transmission relation；
Fig. 3 is the schematic diagram of transmission logic relation；
Fig. 4 is the schematic diagram of data signal pretreatment.
Specific embodiment
A kind of configurable multisystem satellite navigation method of reseptance, comprises the steps：
Step one：Radio frequency link is set
Radio-frequency channel in general is for the processing procedure of signal, after radiofrequency signal is got off from antenna,
First pass around medium or cavity body filter filter out-of-band interference, power amplification is then carried out by LNA chip,
Intermediate-freuqncy signal is down-converted to by frequency mixer；It is mainly filtering for the treatment of intermediate-freuqncy signal and amplifies, suppresses
While out-of-band interference, the amplitude requirement of AD conversion is met.
Conventional satellite navigation neceiver using once or secondary down-converted pattern, every kind of radio-frequency channel
Selected device is typically different, and local oscillation signal frequency is also different.One time down coversion is entered using general fashion
OK, secondary down coversion has some superiority, it is necessary to increase one-level local oscillation circuit and mixting circuit than a down coversion.
So conventional satellite navigation neceiver does not have versatility typically for the treatment of every kind of satellite navigation signals.
This patent radio-frequency channel designs for frequency range to design, rather than single frequency, so list can be realized
While one radio-frequency channel treatment multiple navigation signal, hardware quantity and species are also largely saved,
And cost.This patent radio-frequency channel design different with conventional satellite navigation neceiver includes, using width
Band filtering, including wide band radio-frequency wave filter and Wideband Intermediate Frequency wave filter, frequency can cover GNSS L1 and L2
Frequency range；Using broadband LNA, frequency band covering GNSS L1 and L2 frequency ranges；Using a down coversion mode
Radiofrequency signal is transformed to medium-and-high freuqncy signal, the frequency produced by local oscillation signal can be by outer CPU or other devices
Part carries out parameter flexible configuration by required frequency, without changing different local oscillator chips.
Step 2：Numeral pretreatment parameter setting
Simulation medium-and-high freuqncy signal after down coversion first has to be transformed to data signal, ADC chips and conventional satellite
The type selecting of navigation neceiver is different, it is necessary to from high speed A/D chip, chip switching rate should be higher than that
200MHz；In Practical Project, the sample rate of AD should also meet sampling thheorem.
Analog signal is wideband digital signal after over-sampling, in pretreatment stage each frequency data signal
Down-convert to low intermediate frequency signal.
Data signal pretreatment can be realized in the programmable logic device.Data signal pretreatment includes three
Process：Digital Down Convert, digital filtering, numeral are down-sampled, and processing procedure is as shown in Figure 4.
Digital Down Convert includes data signal local oscillator generation module and digital frequency mixing module；The frequency of local oscillation signal
Can be designed by program with digit, to control the frequency accuracy of middle low intermediate frequency signal after being mixed；
Because leading portion band is roomy, AD sample rates are high, so first to carry out reduction sampling to Low Medium Frequency data signal
The treatment of rate, so just facilitates the further treatment of subsequent algorithm, otherwise because signal position is wide, rear end
Adjustment method consumes logical resource and wants big many, while power consumption can also be significantly increased.Data signal is down-sampled can
Using CIC filtering extractions and the scheme of HB filtering extractions, while signal sampling rate is reduced, it may have
Suppress the performance of out-of-band interference.
After data signal is down-sampled, treatment is also filtered, prevented because front end out-of-band interference suppresses not
Foot, the problem of the follow-up base band signal process degradation for bringing.Digital filter be typically designed as bandwidth compared with
Narrow low pass or bandwidth digital wave filter, can be met using Butterworth filter design and required.
Step 3：Pseudo-noise code generator is set
By after above-mentioned treatment, the performance such as sample rate, bit wide, Out-of-band rejection of data signal, substantially with biography
System satellite navigation receiver is consistent.Capture and tracking of the follow-up treatment mainly to signal, and positioning are led
Boat is resolved.Location navigation resolved for all satellite navigation signals substantially without too big difference, but signal is caught
Obtain and tracking treatment be then because of different satellite-signals, have certain difference, mainly satellite-signal it is pseudo- with
Machine code is inconsistent for different satellites.
For the versatility of base band signal process, scheme is that trapping module and tracking module are designed as general module,
But pseudo-noise code generator is designed as configurable modes, i.e., the satellite feelings according to used by different multimode receivers
Condition, can the different pseudo noise codes of Configuration Online generation.
The configurable multisystem satellite navigation receiver of invention, receiver can be when upper electric by receiver
CPU or FPGA are configured, by configuring frequency, digital local oscillator that radio-frequency channel local oscillator is produced
The parts such as frequency, digital filter, pseudo-noise code generator, realize the receiver of the different satellite-signals for the treatment of.
The configurable receiver of invention can at most process 6 kinds of satellite-signals, while can also be cut out
Cut, reduce the process signal species of DVB.
Claims (4)
1. a kind of configurable multisystem satellite navigation method of reseptance, it is characterised in that comprise the steps：
Step one：Data receiver
External signal is received by two-way antenna,
Step 2：Radio frequency processing
The signal that antenna is received first passes around the conversion of settable down coversion, is then amplified filtering；
Step 3：AD conversion
AD samplings are carried out to the signal after radio frequency processing；
Step 4：Navigation is processed
Data to AD samplings carry out numeral pretreatment first, then caught successively, tracked and are positioned
Resolve, resolve the data for completing and exported to outside.
2. a kind of configurable multisystem satellite navigation method of reseptance as claimed in claim 1, it is characterised in that：
In described step two, the target of down coversion is frequency range, and the frequency range covers the frequency range of satellite earth antenna.
3. a kind of configurable multisystem satellite navigation method of reseptance as claimed in claim 1, it is characterised in that：
In described step four, numeral pretreatment includes：Digital Down Convert, digital filtering, numeral are down-sampled；Its
Middle digital down-sampled use CIC filtering extractions or HB filtering extractions.
4. a kind of configurable multisystem satellite navigation method of reseptance as claimed in claim 1, it is characterised in that：
In described step four, the pseudo noise code that capture and tracking step are used is matched with receiver mode..
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068852A (en) * | 2019-03-09 | 2019-07-30 | 江苏北斗星通汽车电子有限公司 | A kind of high-precision assistant positioning system |
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| US20100073223A1 (en) * | 2006-07-31 | 2010-03-25 | Nicolas Wilhelm | Space navigation receiver operating with the assistance of navigation information |
| CN102244548A (en) * | 2011-08-12 | 2011-11-16 | 电子科技大学 | Cooperative spectrum detection method, cooperative spectrum sensing apparatus and spectrum detection system |
| CN202815221U (en) * | 2012-08-30 | 2013-03-20 | 成都西科微波通讯有限公司 | Programmable and configurable multi-system interoperation satellite navigation receiver tracking channel |
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2015
- 2015-12-04 CN CN201510885619.XA patent/CN106842255A/en active Pending
Patent Citations (5)
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| US20100073223A1 (en) * | 2006-07-31 | 2010-03-25 | Nicolas Wilhelm | Space navigation receiver operating with the assistance of navigation information |
| CN101447795A (en) * | 2007-11-27 | 2009-06-03 | 锐迪科微电子（上海）有限公司 | Low intermediate frequency (IF) digital receiver and frequency modulation method thereof |
| CN101458321A (en) * | 2007-12-12 | 2009-06-17 | 中国科学院国家天文台 | GPS/CAPS dual mode software receiver based on PC machine |
| CN102244548A (en) * | 2011-08-12 | 2011-11-16 | 电子科技大学 | Cooperative spectrum detection method, cooperative spectrum sensing apparatus and spectrum detection system |
| CN202815221U (en) * | 2012-08-30 | 2013-03-20 | 成都西科微波通讯有限公司 | Programmable and configurable multi-system interoperation satellite navigation receiver tracking channel |
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| CN110068852A (en) * | 2019-03-09 | 2019-07-30 | 江苏北斗星通汽车电子有限公司 | A kind of high-precision assistant positioning system |
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Application publication date: 20170613 |
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