阅读说明：本技术 一种gnss信号可用性与完好性监测系统 (A kind of GNSS signal availability and integrity monitoring system ) 是由 孙希延 胡孔旺 纪元法 付文涛 李有明 赵松克 庾新林 于 2019-08-23 设计创作，主要内容包括：本发明公开了一种GNSS信号可用性与完好性监测系统,包括信号接收模块、下变频模块、中频信号处理模块、卫星信号可用性与完好性监测模块和数据存储及可视化模块,所述信号接收模块将接收的多频点卫星导航信号传输至所述下变频模块,所述多频点卫星导航信号经所述下变频模块数模转换处理后到中频数字信号并传输给所述中频信号处理模块,经过所述中频信号处理模块处理编码后的所述数据传输至所述卫星信号可用性与完好性监测模块进行监测评估并给出结果,最后所述数据传输到所述数据存储及可视化模块进行存储或展现,可准确反映出该系统卫星信号的可用性与完好性。(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.)

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.

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)=P_r(dBW)-G_r(dB)+(4πR/λ)² (1)

In formula, P_rTo receive power, G_tFor 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, I_i-I_refAnd Q_i-Q_refFor 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, S_maxFor 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/N_0,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/N_{0_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)+ε_ρ(k)-ε_φ(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)=ε_ρ(k)-ε_φ(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.