CN110531381A - A kind of GNSS signal availability and integrity monitoring system - Google Patents
A kind of GNSS signal availability and integrity monitoring system Download PDFInfo
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- CN110531381A CN110531381A CN201910783305.7A CN201910783305A CN110531381A CN 110531381 A CN110531381 A CN 110531381A CN 201910783305 A CN201910783305 A CN 201910783305A CN 110531381 A CN110531381 A CN 110531381A
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Classifications
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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
- G01S19/03—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
- G01S19/08—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing integrity information, e.g. health of satellites or quality of ephemeris data
Abstract
The invention discloses a kind of GNSS signal availabilities and integrity monitoring system, including signal receiving module, down conversion module, IF signal processing module, satellite-signal availability and the storage of integrity monitoring module and data and visualization model, received multi-frequency-point satellite navigation signal is transmitted to the down conversion module by the signal receiving module, the multi-frequency-point satellite navigation signal to digital intermediate frequency signal and is transferred to the IF signal processing module after down conversion module digital-to-analogue conversion processing, the data after IF signal processing module processing coding are transmitted to the satellite-signal availability and integrity monitoring module is monitored and assesses and provide result, the last data are transferred to the data storage and visualization model is stored or showed, the available of the system-satellite signal can be accurately reflected Property and integrity.
Description
Technical field
The present invention relates to field of satellite navigation more particularly to a kind of GNSS signal availabilities and integrity monitoring system.
Background technique
As the influence that people live increasingly is deepened in navigator fix service, in terms of navigation application market, it is still at present
The GPS navigation positioning system in the U.S. occupies most of market share, and China's BDStar navigation system is wanted to defend with these
It is won victory in the competition of star navigation system it is necessary to pay attention to the quality problems of satellite-signal, in current satellite-signal monitoring system, no
It can all-sidedly and accurately reflect the availability and integrity of the system-satellite signal.
Summary of the invention
The present invention provides a kind of GNSS signal availability and integrity monitoring system, can accurately reflect system-satellite letter
Number availability and integrity.
To achieve the above object, the embodiment of the invention provides a kind of GNSS signal availability and integrity monitoring system,
Including signal receiving module, down conversion module, IF signal processing module, satellite-signal availability and integrity monitoring module and
Data storage and visualization model, the signal receiving module, the down conversion module, the IF signal processing module, institute
It states satellite-signal availability and the integrity monitoring module and data storage and visualization model is successively electrically connected, in which:
The signal receiving module, for receiving multi-frequency-point satellite navigation signal and by the multi-frequency-point satellite navigation signal
It is transmitted to the down conversion module；
The down conversion module, for receiving the multi-frequency-point satellite navigation signal of the signal receiving module transmission,
It handles to obtain digital intermediate frequency signal by digital-to-analogue conversion, the digital intermediate frequency signal is transmitted to the IF signal processing mould
Block；
The IF signal processing module, for receiving the digital intermediate frequency signal of the down conversion module transmission, warp
It is encoded after crossing the processing of the capture to the digital intermediate frequency signal, tracking, the original observed quantity data calculating of text demodulation,
Then the data after coding are transmitted to the satellite-signal availability and integrity monitoring module；
The satellite-signal availability and integrity monitoring module, for receiving the IF signal processing module transmission
Data are monitored assessment to the data from time domain, frequency domain, modulation domain and measurement field, transmit the result to the data and deposit
Storage and visualization model；
Data storage and visualization model, for by the institute of the satellite-signal availability and integrity monitoring module
Result is stated to be stored and showed.
Optionally, the IF signal processing module includes FPGA (Field Programmable Gate Array) core
Piece and DSP (Digital Signal Processing) chip, the fpga chip and the dsp chip are electrically connected,
In:
The fpga chip is adjusted for capture, tracking and the text to the digital intermediate frequency signal and is reconciled, Xiang Suoshu
Dsp chip provides interrupt signal；
The dsp chip realizes accurately timing using the interrupt signal, and as beat timing and the FPGA
Chip carries out the calculating of data interaction, capture control, tracing control, text demodulation and original observed quantity, by the calculated result
It is transmitted to the satellite-signal availability and integrity monitoring module.
Optionally, the original observed quantity data include the I/Q branch data, more after carrier wave removing before pseudo-code removing
In general Le frequency-shift data, pseudo range data, carrier phase data, pseudo-code phase data, carrier-to-noise ratio data or navigation message data
It is one or more.
Optionally, the satellite-signal availability includes pseudo- code sign anomaly assessment unit with integrity monitoring module and waits
Isotropically radiated power computing unit is imitated,
The puppet code sign anomaly assessment unit, for the I/Q branch data to be carried out to the cumulative and bit of solid size piece
The estimated value of pseudo- code sign obtained after quantization is compared with the spreading code symbol threshold under the normal condition of setting, obtains knot
Fruit；
The equivalent isotropically radiated power computing unit, for passing through reception power, transmitting day within continuous a period of time
The equivalent isotropically radiated power that certain relationship between line gain, signal wavelength and the spacing of dual-mode antenna is calculated, by institute
It states equivalent isotropically radiated power and is transmitted in data storage and visualization model and shown with image conversion.
Optionally, the satellite-signal availability and integrity monitoring module include Error Vector Magnitude value measuring unit and
Carrier-to-noise ratio assessment unit,
The Error Vector Magnitude value measuring unit, for the pseudo-code data to be carried out band spectrum modulation and carrier wave tune again
System reappears satellite launch end signal again, and it is poor then to make the code vector signal and received vector signal, then does and count flat
, Error Vector Magnitude value is obtained；
The carrier-to-noise ratio assessment unit will for comparing the relationship with threshold value by carrier-to-noise ratio described in continuous observation signal
The equivalent isotropically radiated power is transmitted in the data storage and visualization model and is shown with image conversion.
Optionally, the satellite-signal availability and integrity monitoring module include that pseudorange reasonable evaluation unit and code carry
Irrelevance monitoring unit,
The pseudorange reasonable evaluation unit, for quasi- by carrying out multinomial to the pseudorange observation data in a period of time
It closes, is smooth, making have minimum fitting poor with initial data, the regression criterion of pseudo range observed quantity is analyzed, is obtained a result；
The code carries irrelevance monitoring unit, for by the pseudo-code phase and carrier wave phase in two neighboring interval time epoch
Result, that is, code after the increment of position observed quantity is calculated using several methods of moving average carries deviation angle value compared with threshold value, obtains knot
Fruit.
Optionally, the satellite-signal availability and integrity monitoring module include satellite health flag bit monitoring unit and
Navigation message quality monitor unit,
The satellite health flag bit monitoring unit is united for directly reading the healthy word information in the navigation message
Meter satellite health status is simultaneously written in file；
The navigation message quality monitor unit is used for reference logical for the practical function according to the navigation message to user
With data quality standard and spatial data quality master pattern, text quality model is described using quality tree.
Optionally, the data storage and visualization model include FLASH storage chip and host computer, in which:
The FLASH storage chip, for storing by the satellite-signal availability and integrity monitoring module transfer
The result；
The host computer, for by the result of the satellite-signal availability and integrity monitoring module transfer with
Graphic exhibition comes out.
Optionally, the multi-frequency-point satellite navigation signal includes global positioning system signal and Big Dipper satellite signal, mark
Claiming frequency is respectively GPS L1 frequency point 1575.42MHz and BD B1 frequency point 1561.098MHz.
The embodiment of the present invention provides a kind of GNSS signal availability and integrity monitoring system, including signal receiving module,
Down conversion module, IF signal processing module, satellite-signal availability and integrity monitoring module and data storage and visualization
Received multi-frequency-point satellite navigation signal is transmitted to the down conversion module by the signal receiving module by module, data warp
To the digital intermediate frequency signal and it is transferred to the IF signal processing module after down conversion module digital-to-analogue conversion processing, by this
The data after audio signalprocessing resume module coding are transmitted to the satellite-signal availability and integrity monitoring module carries out
Monitoring and evaluation simultaneously obtains assessment result, finally by the result be transferred to the data storage and visualization model in carry out storage and
Show, the availability and integrity of the system-satellite signal can be accurately reflected.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of GNSS signal availability and integrity monitoring system provided in an embodiment of the present invention.
Fig. 2 is the structural schematic diagram of satellite-signal availability and integrity monitoring module provided in an embodiment of the present invention.
101- signal receiving module, 102- down conversion module, 103- IF signal processing module, 1031-FPGA chip,
1032-DSP chip, 104- satellite-signal availability and integrity monitoring module, the storage of 105- data and visualization model,
1051-FLASH storage chip, 1052- host computer, 1041- puppet code sign anomaly assessment unit, the equivalent omnidirectional radiation function of 1042-
Rate computing unit, 1043- Error Vector Magnitude value measuring unit, 1044- carrier-to-noise ratio assessment unit, 1045- pseudorange reasonability are commented
Estimate unit, 1046- code carries irrelevance monitoring unit, 1047- satellite health flag bit monitoring unit, 1048- navigation message quality
Monitoring unit.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It is a kind of GNSS signal availability provided in an embodiment of the present invention and integrity monitoring system schematic referring to Fig. 1,
GNSS signal availability described in the embodiment of the present invention and integrity monitoring system, including signal receiving module 101, under
Frequency-variable module 102, IF signal processing module 103, satellite-signal availability and integrity monitoring module 104 and data storage and
Visualization model 105, the signal receiving module 101, the down conversion module 102, the IF signal processing module 103,
The satellite-signal availability and the storage of the integrity monitoring module 104 and data and visualization model 105 successively electrically connect
It connects,
The signal receiving module 101, for receiving multi-frequency-point satellite navigation signal, and by the multi-frequency-point satellite navigation
Signal is transmitted to the down conversion module 102；
The down conversion module 102, the multi-frequency-point satellite navigation transmitted for receiving the signal receiving module 101
Signal handles to obtain digital intermediate frequency signal by digital-to-analogue conversion, and the digital intermediate frequency signal is transmitted at the intermediate-freuqncy signal
Manage module 103；
The IF signal processing module 103, the signal transmitted for receiving the down conversion module 102, passes through
It is encoded after the processing calculated the capture of the signal, tracking, the original observed quantity data of text demodulation, it then will coding
The data afterwards are transmitted to the satellite-signal availability and integrity monitoring module 104；
The satellite-signal availability and integrity monitoring module 104, for receiving the IF signal processing module 103
The data of transmission are monitored assessment to the data from time domain, frequency domain, modulation domain and measurement field, transmit the result to described
Data storage and visualization model 105；
The data storage and visualization model 105, are used for the satellite-signal availability and integrity monitoring module
The result stored and showed.
Specifically, the multi-frequency-point satellite navigation signal received is transmitted to the lower change by the signal receiving module 101
Frequency module 102, the multi-frequency-point satellite navigation signal are analog if signal, amplification by the down conversion module 102, mixed
Frequently, obtain digital intermediate frequency signal after filtering and digital-to-analogue conversion and be transmitted to the IF signal processing module 103, receive in this
After frequency digital signal, the IF signal processing module 103 captures the signal, tracked, the original observation of text demodulation
It is encoded after the processing that amount data calculate, then passes through the satellite-signal availability and 104 pairs of institutes of integrity monitoring module
It states coded data to be monitored assessment from time domain, frequency domain, modulation domain and measurement field and obtain accurate result, finally by described
The result that data storage and visualization model 105 obtain the satellite-signal availability with integrity monitoring module 104 is deposited
It stores up and is come out with graphic exhibition, the availability and integrity of the system-satellite signal can be accurately reflected.
Wherein, referring to Fig. 1, IF signal processing module includes fpga chip 1031 and dsp chip 1032, the FPGA core
Piece 1031 and the dsp chip 1032 are electrically connected.
Specifically, the fpga chip 1031, adjusts for capture, tracking and the text to the signal and reconciles and cache
Get up, while providing interrupt signal to the dsp chip 1032；
The dsp chip 1032 realizes accurately timing using the interrupt signal, it is slow to read the fpga chip 1031
The data deposited, and data interaction, capture control, tracing control, electricity are carried out as beat timing and the fpga chip 1031
The calculating of text demodulation and original observed quantity, is transmitted to the satellite-signal availability and integrity monitoring mould for the calculated result
Block 104.
Wherein, the original observed quantity data include the I/Q branch data, how general after carrier wave removing before pseudo-code removing
Strangle one in frequency-shift data, pseudo range data, carrier phase data, pseudo-code phase data, carrier-to-noise ratio data or navigation message data
Kind is a variety of.
Referring to fig. 2, the satellite-signal availability and integrity monitoring module 104 include pseudo- code sign anomaly assessment unit
1041 and equivalent isotropically radiated power computing unit 1042.
Specifically, the puppet code sign anomaly assessment unit 1041 carries out list to the I/Q two-way spreading code after demodulation first
Adding up for chip, then carries out the quantization of 1bit, obtains the quantized value of every bit, which is the estimated value of pseudo- code sign.Most
It is compared afterwards with the spreading code symbol threshold under the normal condition of setting, it will be able to judge whether each spread spectrum code sign occurs
Exception.
Equivalent isotropically radiated power (EIRP) computing unit 1042, it is therefore an objective to by the fluctuation situation of ground receiver power
Satellite load transmission power stability is assessed, wherein the EIRP of satellite-signal is consistent with ground installation reception power.This algorithm
Using electromagnetic wave atmospheric attenuation model, EIRP when satellite-signal transmitting, the calculation formula of satellite transmitting antenna EIRP are calculated are as follows:
EIRP (dBW)=Pr(dBW)-Gr(dB)+(4πR/λ)2 (1)
In formula, PrTo receive power, GtFor transmitter antenna gain (dBi), λ is signal wavelength, and R is the distance between dual-mode antenna.
The EIRP that assessment needs continuous measurement a period of time is carried out to satellite EIRP stability, this system is defeated using 1 minute
The host computer 1052 that measured value is delivered to data storage and visualization model 105 is patterned system by an EIRP value out
Meter processing.
Referring to fig. 2, the satellite-signal availability and integrity monitoring module 104 include that the measurement of Error Vector Magnitude value is single
Member 1043 and carrier-to-noise ratio assessment unit 1044.
Specifically, Error Vector Magnitude (EVM) the value measuring unit 1043, EVM can reflect out satellite-signal amplitude
With the error in phase, EVM is smaller, and the noise jamming for indicating that signal is subject to is smaller, tests signal and ideal signal is closer.It will
The IF signal processing module 103 obtains pseudo-code and carries out band spectrum modulation and carrier modulation again, reappears satellite launch end letter again
Number, it is poor then to make the code vector signal and received vector signal, then does statistical average to get EVM.Calculation formula are as follows:
In formula, Ii-IrefAnd Qi-QrefFor the I/ of satellite-signal I/Q branch sampled point and ideal situation that actual test obtains
The error of Q branch sampled point, N are total sampling number, SmaxFor the amplitude of the vector of the farthest state of ideal signal polar plot.
The carrier-to-noise ratio assessment unit 1044 compares the relationship with threshold value by continuous observation signal carrier-to-noise ratio, and analysis carries
It makes an uproar the stability of ratio, whether assessment signal power is abnormal.Carrier-to-noise ratio monitoring is made using the carrier-to-noise ratio after smoothing processing
For statistical analysis for monitoring and statistics amount, specific method is as follows:
Wherein, C/N0,n(k) indicate that k reception machine receives the signal carrier-to-noise ratio of satellite n, by smoothed out carrier-to-noise ratio
C/N0_avg,n(k) compared with threshold value, if being less than threshold value, mark this satellite power too small.
Referring to fig. 2, the satellite-signal availability and integrity monitoring module 104 include pseudorange reasonable evaluation unit
1045 and code carry irrelevance monitoring unit 1046.
Specifically, pseudorange reasonable evaluation unit 1045, passes through the pseudorange inputted to the IF signal processing module 103
Observed quantity is calculated, its fluctuation is analyzed.Circular is the pseudorange observation data first taken in a period of time, logarithm
According to fitting of a polynomial is carried out, then data are carried out smoothly, so that curve and initial data have minimum fitting poor, by puppet
Regression criterion away from observed quantity is analyzed, according to the variation range of residual error, to judge the stability of pseudo range observed quantity.
Code carries irrelevance monitoring unit 1046, for calculating input in the IF signal processing module 103 adjacent two
The increment of pseudo-code phase and carrier phase observed quantity between a epoch, can define z (k) indicates Pseudo-range Observations ρ (k) and carrier wave phase
The difference of position observation φ (k):
Z (k)=ρ (k)-φ (k)
=2 Ι (k)+ερ(k)-εφ(k)-λ×N (4)
Assuming that there is no losing locks and complete cycle hopping phenomenon for receiver user, then integer ambiguity N value is protected in observation period
Hold constant, same season δ ε (k)=ερ(k)-εφ(k), then have:
In formula,Indicate the ionosphere delay rate that estimation obtains, Ts is two neighboring interval time epoch.Due to seeing
Survey noise, multipath equal error belong to high-frequency noise, so being filtered using several methods of moving average to the high fdrequency component in dz (k)
It removes, as a result as the ionosphere delay rate of low frequency namely code carry irrelevance.Finally calculated code is carried and deviates angle value and door
Limit value compares, and judges whether it exceeds normal range (NR).
Referring to fig. 2, the satellite-signal availability and integrity monitoring module 104 include pseudorange reasonable evaluation unit
1045 and code carry irrelevance monitoring unit 1046.
Specifically, satellite health flag bit monitoring unit 1047, for directly reading the IF signal processing module 103
In healthy word information in calculated navigation message, obtain the working condition of satellite.The health status of general satellite is divided into two
Kind, one is health, and one is unhealthy.When satellite health, healthy word message identification is 0, and 1 is identified as when unhealthy.So
Afterwards, finally file is written, so that subsequent module is assessed in the health status of GNSS satellite by the satellite health status of statistics.
Navigation message quality monitor unit 1048, the modeling method of navigation message quality monitor unit 1048: according to GNSS
Navigation message has used for reference general data quality standard and spatial data quality master pattern, using matter to the practical function of user
Amount tree description text quality model.From four sides such as text integrality, text consistency, text correctness and text timeliness
Face describes text quality.
Referring to Fig. 1, the data storage and visualization model 105 include FLASH storage chip 1051 and host computer 1052,
The FLASH storage chip 1051 and the host computer 1052 are electrically connected.
Specifically, the FLASH storage chip 1051, for storing by the satellite-signal availability and integrity monitoring
The result that module 104 is transmitted；
The host computer 1052, described in transmitting the satellite-signal availability and integrity monitoring module 104
As a result it is come out with graphic exhibition.
Wherein, the multi-frequency-point satellite navigation signal includes global positioning system signal and Big Dipper satellite signal, nominal
Frequency is respectively GPS L1 frequency point 1575.42MHz and BD B1 frequency point 1561.098MHz.
The embodiment of the present invention is by being somebody's turn to do the received multiband satellite signal transit of signal receiving module to down conversion module
Down conversion module is transferred to IF signal processing module after the multiband satellite-signal is converted to digital intermediate frequency signal, the intermediate frequency
Signal processing module carries out processing coded transmission to the satellite-signal availability and integrity monitoring to the digital intermediate frequency signal
Module, the satellite-signal availability supervise the data from time domain, frequency domain, modulation domain and measurement field with integrity monitoring module
Assessment is estimated, and provides the availability and integrity assessment result of the satellite-signal in real time, and the result is by data storage and visually
Change module display processing, and store into the module, the availability and integrity of the system-satellite signal can be accurately reflected.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (9)
1. a kind of GNSS signal availability and integrity monitoring system, which is characterized in that the GNSS signal availability with it is intact
Property monitoring system include signal receiving module, down conversion module, IF signal processing module, satellite-signal availability and integrity
Monitoring modular and data storage and visualization model, the signal receiving module, the down conversion module, at the intermediate-freuqncy signal
It manages module, the satellite-signal availability and the integrity monitoring module and data storage and visualization model is successively electric
Property connection, in which:
The signal receiving module is passed for receiving multi-frequency-point satellite navigation signal, and by the multi-frequency-point satellite navigation signal
Transport to the down conversion module；
The down conversion module passes through for receiving the multi-frequency-point satellite navigation signal of the signal receiving module transmission
Digital-to-analogue conversion handles to obtain digital intermediate frequency signal, and the digital intermediate frequency signal is transmitted to the IF signal processing module；
The IF signal processing module, for receiving the digital intermediate frequency signal of down conversion module transmission, by pair
It is encoded after the processing that the original observed quantity data of capture, tracking, the text demodulation of the digital intermediate frequency signal calculate, then
The data after coding are transmitted to the satellite-signal availability and integrity monitoring module；
The satellite-signal availability and integrity monitoring module, for receiving the number of the IF signal processing module transmission
According to being monitored assessment to the data from time domain, frequency domain, modulation domain and measurement field, transmit the result to data storage
And visualization model；
Data storage and visualization model, for by the knot of the satellite-signal availability and integrity monitoring module
Fruit is stored and is showed.
2. GNSS signal availability as described in claim 1 and integrity monitoring system, which is characterized in that the intermediate-freuqncy signal
Processing module includes fpga chip and dsp chip, and the fpga chip and the dsp chip are electrically connected, in which:
The fpga chip is adjusted for capture, tracking and the text to the digital intermediate frequency signal and is reconciled, Xiang Suoshu DSP core
Piece provides interrupt signal；
The dsp chip realizes accurately timing using the interrupt signal, and as beat timing and the fpga chip
The calculating for carrying out data interaction, capture control, tracing control, text demodulation and original observed quantity data, calculated result is transmitted
To the satellite-signal availability and integrity monitoring module.
3. GNSS signal availability as claimed in claim 2 and integrity monitoring system, which is characterized in that the original observation
Amount data include I/Q branch data, the doppler shift data, pseudo range data, carrier wave after carrier wave is removed before pseudo-code removing
One of phase data, pseudo-code phase data, carrier-to-noise ratio data or navigation message data are a variety of.
4. GNSS signal availability as claimed in claim 3 and integrity monitoring system, which is characterized in that the satellite-signal
Availability and integrity monitoring module include pseudo- code sign anomaly assessment unit and equivalent isotropically radiated power computing unit；
The puppet code sign anomaly assessment unit, for the I/Q branch data to be carried out to the cumulative and bit quantization of solid size piece
The estimated value of pseudo- code sign obtained afterwards is compared with the spreading code symbol threshold under the normal condition of setting, is obtained a result；
The equivalent isotropically radiated power computing unit, in continuous preset time, by receiving power, transmitting antenna to increase
The equivalent isotropically radiated power that relationship between benefit, signal wavelength and the spacing of dual-mode antenna is calculated, will be described equivalent complete
It is transmitted in the data storage and visualization model to radiant power and is shown with image conversion.
5. GNSS signal availability as claimed in claim 4 and integrity monitoring system, which is characterized in that the satellite-signal
Availability and integrity monitoring module include Error Vector Magnitude value measuring unit and carrier-to-noise ratio assessment unit；
The Error Vector Magnitude value measuring unit, for the pseudo-code data to be carried out band spectrum modulation and carrier modulation again, weight
New reproduction satellite launch end signal, it is poor then to make the code vector signal and received vector signal, then does statistical average calculating,
Obtain Error Vector Magnitude value；
The carrier-to-noise ratio assessment unit will for comparing the relationship with threshold value by carrier-to-noise ratio data described in continuous observation signal
The equivalent isotropically radiated power is transmitted in the data storage and visualization model and is shown with image conversion.
6. GNSS signal availability as claimed in claim 3 and integrity monitoring system, which is characterized in that the satellite-signal
Availability and integrity monitoring module include that pseudorange reasonable evaluation unit and code carry irrelevance monitoring unit；
The pseudorange reasonable evaluation module, for quasi- by carrying out multinomial to the pseudorange observation data in the default section time
It closes, is smooth, making have minimum fitting poor with initial data, the regression criterion of pseudo range data observed quantity is analyzed, obtains knot
Fruit；
The code carries irrelevance monitoring unit, for by two neighboring interval time epoch pseudo-code phase and carrier phase see
Result, that is, code after the increment of measurement is calculated using several methods of moving average carries deviation angle value compared with threshold value, obtains a result.
7. GNSS signal availability as claimed in claim 3 and integrity monitoring system, which is characterized in that the satellite-signal
Availability and integrity monitoring module include satellite health flag bit monitoring unit and navigation message quality monitor unit；
The satellite health flag bit monitoring unit, for directly reading the healthy word information in the navigation message, statistics is defended
Star health status is simultaneously written in file；
The navigation message quality monitor unit uses for reference general number for the practical function according to the navigation message to user
According to quality standard and spatial data quality master pattern, text quality model is described using quality tree.
8. GNSS signal availability as described in claim 1 and integrity monitoring system, which is characterized in that the data storage
And visualization model includes FLASH storage chip and host computer, the FLASH storage chip and the host computer are electrically connected,
Wherein:
The FLASH storage chip, for storing by the institute of the satellite-signal availability and integrity monitoring module transfer
State result；
The host computer, for by the result of the satellite-signal availability and integrity monitoring module transfer with figure
Change is shown.
9. GNSS signal availability as described in claim 1 and integrity monitoring system, which is characterized in that the multifrequency point is defended
Star navigation signal includes global positioning system signal and Big Dipper satellite signal, and nominal frequency is respectively GPS L1 frequency point
1575.42MHz with BD B1 frequency point 1561.098MHz.
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| CN111353131A (en) * | 2020-02-26 | 2020-06-30 | 桂林电子科技大学 | Code-borne deviation threshold calculation method |
| CN111751847A (en) * | 2020-06-29 | 2020-10-09 | 中国科学院国家授时中心 | Method and system for evaluating performance of link signal between navigation satellites based on ground station |
| CN111929710A (en) * | 2020-06-30 | 2020-11-13 | 中国科学院国家授时中心 | Delivery test method for Beidou satellite navigation signal quality assessment |
| CN114422053A (en) * | 2022-03-28 | 2022-04-29 | 成都锢德科技有限公司 | Automatic monitoring and analyzing equipment for satellite signals |
| CN114650107A (en) * | 2020-12-17 | 2022-06-21 | 北京合众思壮科技股份有限公司 | Signal quality monitoring method and device, electronic equipment and storage medium |
| CN115586975A (en) * | 2022-12-13 | 2023-01-10 | 成都奇芯微电子有限公司 | Dynamic management method for embedded end GNSS memory |
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| CN111751847B (en) * | 2020-06-29 | 2022-09-02 | 中国科学院国家授时中心 | Method and system for evaluating performance of link signal between navigation satellites based on ground station |
| CN111929710A (en) * | 2020-06-30 | 2020-11-13 | 中国科学院国家授时中心 | Delivery test method for Beidou satellite navigation signal quality assessment |
| CN114650107A (en) * | 2020-12-17 | 2022-06-21 | 北京合众思壮科技股份有限公司 | Signal quality monitoring method and device, electronic equipment and storage medium |
| CN114422053A (en) * | 2022-03-28 | 2022-04-29 | 成都锢德科技有限公司 | Automatic monitoring and analyzing equipment for satellite signals |
| CN114422053B (en) * | 2022-03-28 | 2022-06-07 | 成都锢德科技有限公司 | Automatic monitoring and analyzing equipment for satellite signals |
| CN115586975A (en) * | 2022-12-13 | 2023-01-10 | 成都奇芯微电子有限公司 | Dynamic management method for embedded end GNSS memory |
| CN115586975B (en) * | 2022-12-13 | 2023-03-31 | 成都奇芯微电子有限公司 | Dynamic management method for embedded end GNSS memory |
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