CN108680934A - The dynamic range detecting system and detection method of satellite navigation signals - Google Patents
The dynamic range detecting system and detection method of satellite navigation signals Download PDFInfo
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- CN108680934A CN108680934A CN201810455221.6A CN201810455221A CN108680934A CN 108680934 A CN108680934 A CN 108680934A CN 201810455221 A CN201810455221 A CN 201810455221A CN 108680934 A CN108680934 A CN 108680934A
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- satellite navigation
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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
- G01S19/23—Testing, monitoring, correcting or calibrating of receiver elements
Abstract
The present invention provides a kind of dynamic range detecting system of satellite navigation signals, including satellite navigation signal simulator, satellite navigation signals frequency automatic acquisition device and Range Analysis computing module.Utilize the dynamic range detecting system of above-mentioned satellite navigation signals, the present invention also provides the dynamic range detection methods of satellite navigation signals, based on satellite navigation signal simulator operation principle and Doppler effect, the radiofrequency signal that receiver receives under Different Dynamic environment can be simulated in real time, satellite navigation signal simulator dynamic range test method is analyzed from speed, acceleration, acceleration etc., and build dynamic range test platform, specific testing scheme is formed, correctness, practicability and the validity of experimental verification test method are carried out.The test method is easy to be reliable, and the dynamic range of satellite navigation signal simulator can be accurately detected in simulated environment.
Description
Technical field
The present invention relates to technical field of satellite navigation more particularly to a kind of dynamic range detecting systems of satellite navigation signals
And detection method.
Background technology
With the construction of Beidou satellite navigation system, this emerging technology of satellite navigation is increasingly by the blueness of all trades and professions
It looks at, satellite navigation receiver is also widely applied.Due to satellite navigation receiver be mainly used in navigation and aviation test the speed,
The fields such as high-acruracy survey are surveyed and drawn, accuracy, the reliability for exporting measurement data are most important.Satellite navigation simulator provides
High-acruracy survey of the signal for equipment such as satellite navigation receivers generates and runs a variety of differences according to specific test request
Simulated scenario, to satellite navigation receiver carry out test and validation, therefore, satellite navigation signal simulator simulation output is penetrated
Frequency signal performance directly affects the test result of satellite navigation receiver.For the satellite navigation receiver test for ensureing growing
The needs of demand and correct reliable assessment establish standard, perfect satellite navigation signal simulator key index measures calibration side
Method is of crucial importance.
In carrying out test job to satellite navigation signal simulator, what is mainly investigated is that the performance of its radiofrequency signal refers to
Mark.Radiofrequency signal performance indicator includes mainly signal power control, dynamic range, pseudorange error control, signal spectrum purity, interior
Portion's timebase frequency accuracy and stability etc., wherein dynamic range are the important of influence satellite navigation signal simulator dynamic characteristic
Technical indicator.Satellite navigation signal simulator dynamic range performance directly determines receiver (especially high dynamic receiver) dynamic
The test result of the dynamic characteristics such as positioning accuracy.Since there are relative motions and real satellite navigation to connect between satellite and the earth
The dynamic characteristic of receipts machine, there are the Doppler of time-varying for the radiofrequency signal that receiver receives, this requires satellite navigation signals to simulate
The radiofrequency signal of device simulation meets index request respectively on speed, acceleration, acceleration.However, since China's satellite is led
Boat signal simulator technology is started late, along with foreign technology blocks, satellite navigation signal simulator dynamic range detection side
The research in face is less, though existing technique study is theoretically analyzed, lacks the detection scheme of practical.
Invention content
In order to solve the problems existing in the prior art, the present invention provides a kind of dynamic range detection system of satellite navigation signals
System, including
Satellite navigation signal simulator, for generating satellite navigation signals；
Satellite navigation signals frequency automatic acquisition device is used for automatic collection signal output frequency value, and is converted into calculating
Machine text；
The satellite navigation signals frequency automatic acquisition device automatic collection signal output frequency value is specially：Pass through acquisition
At the time of when the level of the satellite navigation signal simulator output signal is zero, by the time interval of zero-acrross ing moment, utilize
Form reciprocal is converted into frequency values；
And Range Analysis computing module, refer to for calculating dynamic range according to the computer version of acquisition
Mark.
Optionally, the dynamic range detecting system of satellite navigation signals further includes satellite navigation signals dynamic variation characteristic control
Molding block, for controlling the satellite navigation signal simulator freely to configure detection scene, the Range Analysis calculates
Module calculates corresponding dynamic range index in conjunction with the detection scene；The satellite navigation signals dynamic variation characteristic controls mould
Block includes：First unit, the band spectrum modulation feature for releasing satellite navigation signals remove the text letter of satellite navigation signals
Breath；Second unit, the virtual location for the position of navigation satellite to be adjusted to geostationary orbit by the position of real definition；
Third unit, for by the direction of motion of receiver by being adjusted to point to the virtual direction of satellite along the true directions of landing ground；
Unit the 4th by the kinematic parameter of receiver by the actual parameter of variable motion be adjusted at the uniform velocity, it is even acceleration and it is even plus accelerate void
Quasi- parameter.
Further, the detection scene includes velocity measuring scene, acceleration detection scene and acceleration detecting field
Scape, the corresponding dynamic range index includes speed, acceleration, acceleration index；The satellite navigation signals are led for satellite
The radiofrequency signal that boat receiver can receive；Dynamic range is calculated according to Doppler frequency shift shown in the computer version to refer to
Mark；The dynamic range detecting system of satellite navigation signals further includes amplifier, for amplifying the satellite navigation signals.
On the other hand, the present invention also provides a kind of dynamic range detection methods of satellite navigation signals, including
Satellite navigation signal simulator generates satellite navigation signals；
Satellite navigation signals frequency automatic acquisition device automatic collection signal output frequency value, and it is converted into computer literal
This；The satellite navigation signals frequency automatic acquisition device automatic collection signal output frequency value is specially：Described in acquisition
At the time of when the level of satellite navigation signal simulator output signal is zero, by the time interval of zero-acrross ing moment, inverse is utilized
Form be converted into frequency values；
Range Analysis computing module calculates dynamic range index according to the computer version of acquisition.
Wherein, before the satellite navigation signal simulator generates satellite navigation signals, booting preheating is first realized.
Optionally, satellite navigation signals dynamic variation characteristic control module controls the satellite navigation signal simulator to match
Detection scene is set, the satellite navigation signal simulator runs the detection scene, generates satellite navigation signals；The satellite navigation
Signal dynamics variation characteristic control module has following functions：(1) the band spectrum modulation feature for releasing satellite navigation signals, removes and defends
The textual information of star navigation signal；(2) position of navigation satellite is adjusted to geostationary orbit by the position of real definition
Virtual location；(3) by the direction of motion of receiver by being adjusted to point to the virtual direction of satellite along the true directions of landing ground；
(4) by the kinematic parameter of receiver by the actual parameter of variable motion be adjusted at the uniform velocity, it is even acceleration and it is even plus accelerate virtual ginseng
Number.
Optionally, the detection scene is velocity measuring scene, and the fortune of satellite navigation receiver under the detection scene is arranged
Movable model is：Using the satellite navigation signal simulator speed index range higher limit as velocity amplitude after static, along satellite diameter
To direction uniform motion；The Range Analysis computing module is based on Doppler frequency shift principle, utilizes formulaMeter
Calculate speed dynamic range；Wherein, v is speed, and fd is Doppler frequency shift, and c is the light velocity, and fs is that the satellite navigation receiver is static
When the radio frequency signal frequency value that receives.
Optionally, the detection scene is acceleration detection scene, and satellite navigation receiver under the detection scene is arranged
Motion model is：Using the satellite navigation signal simulator acceleration indication range upper limit value as acceleration value after static, along
Satellite radial direction uniformly accelerated motion, final speed are the satellite navigation signal simulator speed index range higher limit；It can
Choosing, the Range Analysis computing module is based on Doppler frequency shift principle, utilizes formulaIt is dynamic to calculate acceleration
State range；Wherein, a is acceleration, and fd is Doppler frequency shift, and c is the light velocity, and Δ T is that frequency is passed through since least significant end to most significant end
The time crossed, fs are the radio frequency signal frequency value received when the satellite navigation receiver is static.
Optionally, the detection scene is that acceleration detects scene, and satellite navigation receiver under the detection scene is arranged
Motion model be：Using the satellite navigation signal simulator acceleration indication range upper limit value as jerk value after static,
The even plus accelerated motion for being zero as acceleration along satellite radial direction, final speed are satellite navigation signal simulator speed
Spend indication range upper limit value；The Range Analysis computing module is based on Doppler frequency shift principle, utilizes formulaCalculate acceleration dynamic range；Wherein, J is acceleration, and fd is Doppler frequency shift, and c is the light velocity, and Δ T is
Frequency is the radio frequency letter received when the satellite navigation receiver is static to most significant end elapsed time, fs since least significant end
Number frequency values.
Optionally, configuring the method for detecting scene includes
Close atmosphere delay；
Global position system is selected, and satellite-signal frequency point is set；
Satellite navigation signal simulator selects single visible satellite scene, edits this satellite orbit parameter and is at ground
In ball stationary orbit, and it is B in the longitude of spherical intersection that satellite, which is arranged, with earth center line；
The visible satellite spreading code and navigation data are closed, it is made only to send single-carrier modulated signal；
It is maximum value that the visible satellite signal power, which is arranged,；
Setting satellite navigation receiver initial position longitude be B, latitude value 0, height value be more than 0, the direction of motion
Unit vector is (cosB, sinB, 0).
Optionally, the satellite navigation signal simulator supports BDS systems, selects to select five when single visible satellite scene
A visible satellite in geostationary orbit satellite.
The dynamic range detecting system of the satellite navigation signals of the present invention is based on satellite navigation signal simulator operation principle
And Doppler effect, the radiofrequency signal that receiver receives under Different Dynamic environment is simulated in real time, from speed, acceleration plus is added
Speed etc. analyzes satellite navigation signal simulator dynamic range test method, and builds dynamic range test platform, is formed
Specific testing scheme carries out correctness, practicability and the validity of experimental verification test method.The test method is easy to be reliable,
The dynamic range of satellite navigation signal simulator can be accurately detected in simulated environment.
Description of the drawings
Fig. 1 is the structural schematic diagram of the dynamic range detecting system of satellite navigation signals described in one embodiment of the invention.
Specific implementation mode
The present invention is described in further detail below in conjunction with the drawings and specific embodiments so that advantages of the present invention and spy
Sign becomes apparent from.It should be noted that attached drawing is all made of very simplified form and uses non-accurate ratio, only to side
Just the purpose of the embodiment of the present invention, is lucidly aided in illustrating.
As shown in Figure 1, the dynamic range detecting system of the satellite navigation signals of the present invention includes：
Satellite navigation signal simulator, for generating satellite navigation signals；
Satellite navigation signals frequency automatic acquisition device is used for automatic collection signal output frequency value, and is converted into calculating
Machine text；
The satellite navigation signals frequency automatic acquisition device automatic collection signal output frequency value is specially：Pass through acquisition
At the time of when the level of the satellite navigation signal simulator output signal is zero, by the time interval of zero-acrross ing moment, utilize
Form reciprocal is converted into frequency values；
And Range Analysis computing module, refer to for calculating dynamic range according to the computer version of acquisition
Mark.
Specifically, at the time of when being zero by the level for acquiring satellite navigation simulator output signal, pass through zero-acrross ing moment
Time interval, be converted into frequency values using form reciprocal, improve the precision of common frequencies meter frequency acquisition, and make up common
The problem of frequency meter frequency acquisition excalation.When calculating single-carrier signal frequency values, generally by counting within a certain period of time
The number that signal reaches threshold level value obtains, and in order to simplify design scheme and ensure realizability on hardware, is typically chosen
Datum (0V) is used as threshold level value.When signal frequency changes over time, frequency values obtained by the above method are statistics
Average frequency value in time is needed timing statistics as far as possible to obtain accurate instantaneous frequency values as far as possible in experiment
Reduce.Satellite navigation signals frequency automatic acquisition device of the satellite navigation signals frequency in 1.5GHz or so, the present invention can
Accurate calibration is carried out to the zero crossing timestamp of satellite navigation signals, the resolving power of timestamp is 9ps, disclosure satisfy that and is less than
The frequency analysis requirement of 50GHz signals, therefore satellite navigation signals frequency collection demand is fully met, device is by leading satellite
The time for signal zero-crossing of navigating carries out precise acquisition, obtains satellite navigation signals frequency values and changes with time trend, for dynamic
Surface analysis computing module provides accurate, sufficient sample data.
The dynamic range detecting system of satellite navigation signals further includes satellite navigation signals dynamic variation characteristic control module,
For controlling the satellite navigation signal simulator freely to configure detection scene, the Range Analysis computing module combines
The detection scene calculates corresponding dynamic range index.
Specifically, navigation satellite is to terrestrial broadcasting satellite navigation signals, when the receiver Relative Navigation satellite on ground generates
When movement, the frequency for the satellite-signal that receiver receives will appear corresponding Doppler shift, and the present invention will finally pass through analysis
Doppler shift change with time characteristic complete satellite signal simulator dynamic characteristic calibration.In addition, leading under normal circumstances
Boat signal is modulated spread spectrum signal, and satellite navigation signals frequency automatic acquisition device error is acquired, and only releases spread spectrum and adjusts
Signals collecting function could be completed after system.Therefore satellite navigation signals dynamic variation characteristic control module has following functions：(1)
The band spectrum modulation feature for releasing satellite navigation signals, removes the textual information of satellite navigation signals；(2) by the position of navigation satellite
The virtual location of geostationary orbit is adjusted to by the position of real definition；(3) by the direction of motion of receiver by along landing ground
True directions be adjusted to point to the virtual direction of satellite；(4) by the kinematic parameter of receiver by the actual parameter of variable motion
Be adjusted at the uniform velocity, it is even acceleration and it is even plus accelerate virtual parameter.
The dynamic range detecting system of satellite navigation signals further includes amplifier, for example, low noise amplifier, is connected to and defends
Between star navigation signal simulator and frequency meter.If desired the smaller signal of test intensity, then need amplifier by satellite navigation
Signal amplifies, so that frequency meter receives.
The present invention also provides a kind of dynamic range detection methods of satellite navigation signals, mainly include the following steps that：
Satellite navigation signal simulator generates satellite navigation signals；
Frequency meter measures the frequency values of the satellite navigation signals；
The frequency values automatic collection is in real time computer version by frequency automatic acquisition device；And
Range Analysis computing module calculates dynamic range index according to the computer version of acquisition.
This method is described in further detail with a specific embodiment below.
The first step opens satellite navigation signal simulator, and preheats 30min or more.
Second step calls velocity interval test scene, the scene to have the following characteristics that：
Close atmosphere delay；
BDS systems are selected, and satellite-signal frequency point B1 is set；
Simulator simulating scenes select single geostationary orbit satellite, edit this satellite orbit parameter and are at ground
In ball stationary orbit, and B=0 ° of the longitude of substar is set；
Visible satellite spreading code and navigation data are closed, it is made only to send single-carrier modulated signal；
Setting visible satellite signal power is maximum value；
Setting receiver initial position longitude is B, and latitude value 0, height value is 6378.140 kilometers, the direction of motion
Unit vector is (cosB, sinB, 0)；
Receiver motion model is set：With simulator speed under ECEF coordinate system after receiver static 10s, 10s
The upper limit value of range specifications, such as speed (Vx, Vy, Vz)=(100000m/s, 0,0) do the uniform motion of 1min；
Third walks, and runs the scene and starts to emulate, the frequency values of the real-time frequency acquisition meter output of frequency automatic acquisition device,
Range Analysis computing module is based on Doppler frequency shift principle, utilizes formula 1) calculating speed value v, (- v~+v) is used as speed
Dynamic range：
In formula, v is speed, and fd is Doppler frequency shift, and c is the light velocity, and fs is the radiofrequency signal received when receiver is static
Frequency values.
4th step stops emulation, and acceleration range test scene, the scene is called to have the following characteristics that：
Close atmosphere delay；
BDS systems are selected, and satellite-signal frequency point B1 is set；
Simulator simulating scenes select single geostationary orbit satellite, edit this satellite orbit parameter and are at ground
In ball stationary orbit, and B=0 ° of the longitude of substar is set；
Visible satellite spreading code and navigation data are closed, it is made only to send single-carrier modulated signal；
Setting visible satellite signal power is maximum value；
Setting receiver initial position longitude is B, and latitude value 0, height value is 6378.140 kilometers, the direction of motion
Unit vector is (cosB, sinB, 0)；
Receiver motion model is set：With initial velocity under ECEF coordinate system after receiver static 10s, 10s
(Vx, Vy, Vz)=(0,0,0), acceleration are (ax, ay, az)=(5000m/s2, 0,0) and do the uniformly accelerated motion of 20s；
5th step runs the scene and starts to emulate, the frequency values of the real-time frequency acquisition meter output of frequency automatic acquisition device,
Range Analysis computing module is based on Doppler frequency shift principle, utilizes formula 2) acceleration value α is calculated, (- α~+α), which is used as, to be added
Speed dynamic range：
In formula, a is acceleration, and fd is Doppler frequency shift, and c is the light velocity, and Δ T is that frequency is passed through since least significant end to most significant end
The time crossed, fs are the radio frequency signal frequency value received when receiver is static.
6th step stops emulation, and acceleration range test scene, the scene is called to have the following characteristics that：
Close atmosphere delay；
BDS systems are selected, and satellite-signal frequency point B1 is set；
Simulator simulating scenes select single geostationary orbit satellite, edit this satellite orbit parameter and are at ground
In ball stationary orbit, and B=0 ° of the longitude of substar is set；
Visible satellite spreading code and navigation data are closed, it is made only to send single-carrier modulated signal；
Setting visible satellite signal power is maximum value；
Setting receiver initial position longitude is B, and latitude value 0, height value is 6378.140 kilometers, the direction of motion
Unit vector is (cosB, sinB, 0)；
Receiver motion model is set：With initial velocity under ECEF coordinate system after receiver static 10s, 10s
(Vx, Vy, Vz)=(0,0,0), acceleration be (ax, ay, az)=(0,0,0), acceleration be (Jx, Jy, Jz)=
(10000m/s3, 0,0) and it does the even of 20s plus accelerates；
7th step runs the scene and starts to emulate, the frequency values of the real-time frequency acquisition meter output of frequency automatic acquisition device,
Range Analysis computing module is based on Doppler frequency shift principle, utilizes formula 3) calculate jerk value J, (- J~+J) conduct
Acceleration dynamic range：
In formula, J is acceleration, and fd is Doppler frequency shift, and c is the light velocity, and Δ T is for frequency to most significant end since least significant end
Elapsed time, fs are the radio frequency signal frequency value received when receiver is static.
The present invention is based on satellite navigation signal simulator operation principle and Doppler effect, simulate Different Dynamic environment in real time
The radiofrequency signal that lower receiver receives, it is dynamic from speed, acceleration, acceleration etc. analysis satellite navigation signal simulator
State range test method, and dynamic range test platform is built, specific testing scheme is formed, experimental verification test method is carried out
Correctness, practicability and validity.The test method is easy to be reliable, and satellite navigation signals mould can be accurately detected in simulated environment
The dynamic range of quasi- device.
Obviously, those skilled in the art can carry out invention spirit of the various modification and variations without departing from the present invention
And range.If in this way, these modifications and changes of the present invention belong to the claims in the present invention and its equivalent technologies range it
Interior, then the present invention is also intended to including these modification and variations.
Claims (10)
1. a kind of dynamic range detecting system of satellite navigation signals, which is characterized in that including
Satellite navigation signal simulator, for generating satellite navigation signals；
Satellite navigation signals frequency automatic acquisition device is used for automatic collection signal output frequency value, and is converted into computer literal
This；
The satellite navigation signals frequency automatic acquisition device automatic collection signal output frequency value is specially：Described in acquisition
At the time of when the level of satellite navigation signal simulator output signal is zero, by the time interval of zero-acrross ing moment, inverse is utilized
Form be converted into frequency values；
And Range Analysis computing module, for calculating dynamic range index according to the computer version of acquisition.
2. the dynamic range detecting system of satellite navigation signals as described in claim 1, which is characterized in that further include that satellite is led
Boat signal dynamics variation characteristic control module detects scene for controlling the satellite navigation signal simulator freely to configure,
The Range Analysis computing module calculates corresponding dynamic range index in conjunction with the detection scene；The satellite navigation letter
Number dynamic variation characteristic control module includes：First unit, the band spectrum modulation feature for releasing satellite navigation signals, removes and defends
The textual information of star navigation signal；Second unit, for the position of navigation satellite to be adjusted to the earth by the position of real definition
The virtual location of geo-stationary orbit；Third unit, for the direction of motion of receiver to be adjusted to by the true directions along landing ground
It is directed toward the virtual direction of satellite；Unit the 4th by the kinematic parameter of receiver by the actual parameter of variable motion be adjusted at the uniform velocity,
Even acceleration and virtual parameter that is even plus accelerating.
3. the dynamic range detecting system of satellite navigation signals as claimed in claim 2, which is characterized in that the detection scene
Scene is detected including velocity measuring scene, acceleration detection scene and acceleration, the corresponding dynamic range index includes speed
Degree, acceleration, acceleration index；The satellite navigation signals are the radiofrequency signal that satellite navigation receiver can receive；Root
Dynamic range index is calculated according to Doppler frequency shift shown in the computer version；The dynamic range of the satellite navigation signals is examined
Examining system further includes amplifier, for amplifying the satellite navigation signals.
4. a kind of dynamic range detection method of satellite navigation signals, which is characterized in that including
Satellite navigation signal simulator generates satellite navigation signals；
Satellite navigation signals frequency automatic acquisition device automatic collection signal output frequency value, and it is converted into computer version；Institute
Stating satellite navigation signals frequency automatic acquisition device automatic collection signal output frequency value is specially：It is led by acquiring the satellite
At the time of when the level for signal simulator output signal of navigating is zero, by the time interval of zero-acrross ing moment, form reciprocal is utilized
It is converted into frequency values；
Range Analysis computing module calculates dynamic range index according to the computer version of acquisition；
Wherein, before the satellite navigation signal simulator generates satellite navigation signals, booting preheating is first realized.
5. the dynamic range detection method of satellite navigation signals as claimed in claim 4, which is characterized in that satellite navigation signals
Dynamic variation characteristic control module controls the satellite navigation signal simulator to configure detection scene, the satellite navigation signals
Simulator runs the detection scene, generates satellite navigation signals；The satellite navigation signals dynamic variation characteristic control module tool
Standby following functions：(1) the band spectrum modulation feature for releasing satellite navigation signals, removes the textual information of satellite navigation signals；(2) will
The position of navigation satellite is adjusted to the virtual location of geostationary orbit by the position of real definition；(3) by the movement of receiver
Direction is by being adjusted to point to the virtual direction of satellite along the true directions of landing ground；(4) by the kinematic parameter of receiver by speed change
The actual parameter of movement be adjusted at the uniform velocity, it is even acceleration and it is even plus accelerate virtual parameter.
6. the dynamic range detection method of satellite navigation signals as claimed in claim 5, which is characterized in that the detection scene
For velocity measuring scene, the motion model that satellite navigation receiver under the detection scene is arranged is：It is led with the satellite after static
Boat signal simulator speed index range higher limit is velocity amplitude, along satellite radial direction uniform motion；The dynamic range
It analyzes computing module and is based on Doppler frequency shift principle, utilize formulaCalculating speed dynamic range；Wherein, v is speed,
Fd is Doppler frequency shift, and c is the light velocity, and fs is the radio frequency signal frequency value received when the satellite navigation receiver is static.
7. the dynamic range detection method of satellite navigation signals as claimed in claim 5, which is characterized in that the detection scene
For acceleration detection scene, the motion model that satellite navigation receiver under the detection scene is arranged is：With the satellite after static
Navigation signal simulator acceleration indication range upper limit value is acceleration value, along satellite radial direction uniformly accelerated motion, finally
Speed is the satellite navigation signal simulator speed index range higher limit；The Range Analysis computing module is based on more
General Le frequency displacement principle, utilizes formulaCalculate acceleration dynamic range；Wherein, a is acceleration, and fd is Doppler's frequency
It moves, c is the light velocity, and Δ T is that frequency is that the satellite navigation receiver is static to most significant end elapsed time, fs since least significant end
When the radio frequency signal frequency value that receives.
8. the dynamic range detection method of satellite navigation signals as claimed in claim 5, which is characterized in that the detection scene
Scene is detected for acceleration, the motion model that satellite navigation receiver under the detection scene is arranged is：It is defended with described after static
Star navigation signal simulator acceleration indication range upper limit value is jerk value, as acceleration is zero along satellite radial direction
It is even plus accelerate, final speed be the satellite navigation signal simulator speed index range higher limit；The dynamic model
It encloses analysis computing module and is based on Doppler frequency shift principle, utilize formulaCalculate acceleration dynamic range；Wherein,
J is acceleration, and fd is Doppler frequency shift, and c is the light velocity, and Δ T is for frequency to most significant end elapsed time, fs since least significant end
The radio frequency signal frequency value received when static for the satellite navigation receiver.
9. the dynamic range detection method of the satellite navigation signals as described in claim 5-8 any one, which is characterized in that match
Setting the method for detecting scene includes：
Close atmosphere delay；
Global position system is selected, and satellite-signal frequency point is set；
Satellite navigation signal simulator selects single visible satellite scene, and editing this satellite orbit parameter, to be at the earth quiet
Only on track, and it is B in the longitude of spherical intersection that satellite, which is arranged, with earth center line；
The visible satellite spreading code and navigation data are closed, it is made only to send single-carrier modulated signal；
It is maximum value that the visible satellite signal power, which is arranged,；
Setting satellite navigation receiver initial position longitude is B, and latitude value 0, height value is more than 0, the unit of the direction of motion
Vector is (cosB, sinB, 0).
10. the dynamic range detection method of satellite navigation signals as claimed in claim 9, which is characterized in that the satellite is led
The signal simulator that navigates supports BDS systems, selects to select one in five geostationary orbit satellites when single visible satellite scene
Visible satellite.
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| CN114035209A (en) * | 2021-11-03 | 2022-02-11 | 湖南国天电子科技有限公司 | Satellite navigation signal model design calculation method |
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