CN106452628A - Satellite signal simulator and satellite signal simulation method - Google Patents
Satellite signal simulator and satellite signal simulation method Download PDFInfo
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- CN106452628A CN106452628A CN201610801360.0A CN201610801360A CN106452628A CN 106452628 A CN106452628 A CN 106452628A CN 201610801360 A CN201610801360 A CN 201610801360A CN 106452628 A CN106452628 A CN 106452628A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/391—Modelling the propagation channel
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
- H04B1/0028—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage
- H04B1/0035—Channel filtering, i.e. selecting a frequency channel within a software radio system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/0082—Monitoring; Testing using service channels; using auxiliary channels
- H04B17/0087—Monitoring; Testing using service channels; using auxiliary channels using auxiliary channels or channel simulators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/391—Modelling the propagation channel
- H04B17/3911—Fading models or fading generators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
- H04B7/18532—Arrangements for managing transmission, i.e. for transporting data or a signalling message
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- Computer Networks & Wireless Communication (AREA)
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- Electromagnetism (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Radio Relay Systems (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The invention discloses a satellite signal simulator and a satellite signal simulation method. The satellite signal simulator comprises a channel parameter generation unit used for calculating channel feature parameters according to satellite channel model parameters, communication frequency points, orbit parameters, terminal parameters and environment parameters; a radio frequency input unit used for converting intermediate-frequency signals of a satellite down to baseband signals; a channel simulation unit used for, according to the channel feature parameters, respectively performing Doppler frequency shift, multipath shadow fading, additive white noise and amplification filtering processing on the baseband signals; and a radio frequency output unit used for converting the signals output by the channel simulation unit into radio frequency signals for output. According to the invention, the simulated channel model types are enabled to be more diversified, the operation is convenient and visual, and the work accuracy and the data reliability of the satellite signal simulator are improved.
Description
Technical field
Technical field of satellite communication of the present invention, and in particular to a kind of satellite signal simulator and satellite signal simulation method.
Background technology
In the predevelopment phase of Satellite Communication System Design, planning and transceiver, need between satellite and ground
Communication channel characteristics are analyzed and simulate, and are particularly under low orbit ruuning situation, between satellite and receiver in satellite
Relative velocity, relative acceleration all especially big, satellite channel has high dynamic Doppler frequency shift conversion characteristics.In design one
Reasonably, meet demand satellite communication system and transceiver when, mobile satellite channel need to be fully taken into account to its performance
Restriction, because the characteristic of channel is the principal element for affecting systematic function.Therefore only fully, meticulously understanding satellite channel spy
On the premise of property, system could be designed and optimize.
True and reliable satellite channel characteristic needs to be surveyed by satellite or spacecraft, but due to radio wave propagation
Time variation, test environment cannot keep equal state, and therefore cannot accurately pass judgment on out impact system factor according to test result is
Environmental change causes or system reason itself, brings very big difficulty to test job.Therefore, letter is carried out by Seeds of First Post-flight
Road specificity analysises are also infeasible.
Under laboratory condition, scientific research personnel can carry out emulation mould with software again by carrying out mathematical modeling to the characteristic of channel
Intend, good mathematical model can be with analog satellite communication channel characteristics, and existing many researchs with regard to channel model both at home and abroad become
Really.There are three alanysis models to be used to satellite channel is described, be empirical model, probability Distribution Model and geometric model respectively.Warp
The physical essence that model can not explain communication process is tested, but the sensitivity to important parameter can be depicted；Probability distribution mould
Type establishes the understanding to communication process, practical situation is done except simplifying it is assumed that geometric model adopts the side of geometrical analysiss
Method, can predict the effect of single or multiple scattering sources, explain decline mechanism, but must be by actual result amplification to actual complicated feelings
Condition.Most of classical models are all that empirical model and probability Distribution Model combine, and form the statistics with statistics nearness
Model, classical statistical model has C.Loo model, Corazza model and Lutz model.
Therefore need to study a kind of channel model that can truly reflect the characteristic of channel, at present several channel moulds common both at home and abroad
Type has C.Loo, Corazza and Lutz channel model.By carrying out emulation of the computer software to these models, can achieve to channel
Simulation, however, too big due to realizing process amount of calculation, and lack physical interface, computer is used alone cannot be complete in real time
Become channel simulation.
Content of the invention
In view of this, the embodiment of the present invention provides satellite signal simulator and satellite signal simulation method, the technology of solution
It is too big that problem is that existing satellite signal simulator realizes process amount of calculation, and lacks physical interface, computer is used alone no
Method completes channel simulation in real time.
For solving above-mentioned technical problem, on the one hand technical scheme provides a kind of satellite signal simulator, bag
Include：
Channel parameter signal generating unit, for according to satellite channel model parameter, communication frequency, orbit parameter, terminal parameter
And ambient parameter is calculated characteristic of channel parameter；
Radio frequency input block, for being down-converted to baseband signal by the intermediate-freuqncy signal of satellite；
Channel simulation unit, for carrying out Doppler's frequency respectively according to the characteristic of channel parameter to the baseband signal
Shifting, multi-path shadow decline, additive white noise and amplification Filtering Processing；
Radio frequency output unit, the signal for exporting channel simulation unit is converted into radiofrequency signal output.
Preferably, the characteristic of channel parameter include Doppler frequency shift parameter that satellite produced under high dynamic, due to anti-
Penetrate or reflect the additive white noise signal to noise ratio parameter that the multi-path shadow fading parameter for producing and wireless transmission link are produced, wherein,
The multi-path shadow fading parameter includes multipath number, every road multipath delay and per road multipath fading.
Preferably, the channel simulation unit includes Doppler frequency shift module, multi-path shadow decline module, additive white noise
Module and satellite load module.
The Doppler frequency shift module is used for for the baseband signal of radio frequency input block input loading Doppler frequency shift
Parameter obtains the first signal；
The multi-path shadow decline module obtains the second letter for first signal is multiplied by multi-path shadow fading parameter
Number；
The additive noise module is used for producing white noise according to additive white noise signal to noise ratio parameter, and by the white noise
It is superimposed with secondary signal and obtains the 3rd signal；
The satellite load module is made up of amplifier submodule and filter sub-module, for entering the 3rd signal
Row amplifies Filtering Processing, and by and the signal after process is sent to the radio frequency output unit.
Preferably, the multi-path shadow decline module includes shunt, combiner and located at the shunt, combiner
Between N road multipath, N be natural number, wherein a road multipath is by power attenuation submodule, multipath fading submodule and shadow fading
Submodule constitutes, and remaining N-1 road multipath is by multidiameter delay submodule, power attenuation submodule, multipath fading submodule and shade
Decline submodule composition.
Preferably, the radio frequency input block includes A/D modular converter and is connected to the down coversion of the A/D modular converter
Module, the A/D modular converter be used for gather satellite equipment output intermediate-freuqncy signal, the down conversion module be used for will be described in
Frequency signal is down-converted to baseband signal and the baseband signal is sent to the channel simulation unit.
Preferably, the radio frequency output unit includes up-converter module and is connected to the D/A conversion of the up-converter module
Module, the up-converter module is used for carrying out upconverting to intermediate-freuqncy signal by the signal of channel simulation unit output, and the D/A turns
Mold changing block is used for for the intermediate-freuqncy signal being converted into radiofrequency signal output.
On the other hand, the present invention also provides a kind of satellite signal simulation method, the method comprising the steps of：
Channel is calculated according to satellite channel model parameter, communication frequency, orbit parameter, terminal parameter and ambient parameter
Characterisitic parameter；
The intermediate-freuqncy signal of satellite is down-converted to baseband signal；
Carry out Doppler frequency shift, multi-path shadow decline to the baseband signal respectively, add according to the characteristic of channel parameter
Property white noise and amplify Filtering Processing and by the baseband signal after process be converted into radiofrequency signal output.
Preferably, the characteristic of channel parameter include Doppler frequency shift parameter that satellite produced under high dynamic, due to anti-
Penetrate or reflect the additive white noise signal to noise ratio parameter that the multi-path shadow fading parameter for producing and wireless transmission link are produced, wherein,
The multi-path shadow fading parameter includes multipath number, every road multipath delay and per road multipath fading.
Preferably, described Doppler frequency shift, multipath are carried out respectively to the baseband signal according to the characteristic of channel parameter
Shadow fading, additive white noise and amplification Filtering Processing include：
The baseband signal of radio frequency input block input is loaded Doppler frequency shift parameter and obtains the first signal；
First signal is multiplied by multi-path shadow fading parameter and obtains secondary signal；
White noise is produced according to additive white noise signal to noise ratio parameter, and the white noise is superimposed with secondary signal is obtained the
Three signals；
3rd signal is amplified Filtering Processing.
Preferably, described first signal be multiplied by multi-path shadow fading parameter obtain secondary signal include：
First signal of input is divided into N number of path subsignal, and according to multi-path shadow fading parameter Zhong Mei road multipath
Time delay, carries out delay process to multichannel subsignal；
The power attenuation of simulation signal calculated is simultaneously loaded in subsignal；
The multipath fading of signal calculated is simulated according to multi-path shadow fading parameter and is loaded in subsignal；
The shadow fading of signal calculated is simulated according to multi-path shadow fading parameter and is loaded in subsignal；
N way signal through power attenuation, multipath fading and shadow fading is overlapped forming secondary signal.
Using technique scheme, the present invention can at least obtain following technique effects：
Satellite signal simulator of the present invention and its implementation cause the channel model species that simulates more diversified, operation
Convenient directly perceived, improve accuracy and the data reliability of satellite signal simulator work.
Description of the drawings
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to institute in embodiment of the present invention description
The accompanying drawing for using is needed to be briefly described, it should be apparent that, drawings in the following description are only some enforcements of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can also be implemented according to the present invention
The content of example and these accompanying drawings obtain other accompanying drawings.
Fig. 1 is the overall construction drawing of satellite signal simulator of the present invention；
Fig. 2 is the structural representation of the channel simulation unit in Fig. 1；
Fig. 3 is the principle schematic of the multi-path shadow decline module in Fig. 2；
Fig. 4 is the schematic flow sheet of satellite signal simulation method of the present invention.
Specific embodiment
For make present invention solves the technical problem that, the technical scheme that adopts and the technique effect that reaches clearer, below
Accompanying drawing will be combined to be described in further detail the technical scheme of the embodiment of the present invention, it is clear that described embodiment is only
It is a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those skilled in the art exist
The every other embodiment for being obtained under the premise of not making creative work, belongs to the scope of protection of the invention.
Refer to the overall construction drawing that Fig. 1, Fig. 1 are satellite signal simulators of the present invention.Satellite signal simulator of the present invention
Including：Channel parameter signal generating unit 20, radio frequency input block 40, channel simulation unit 50 and radio frequency output unit 60, wherein, institute
Channel parameter signal generating unit 20 is stated for according to satellite channel model parameter, communication frequency, orbit parameter, terminal parameter and environment
Parameter is calculated characteristic of channel parameter；The radio frequency input block 40 is used for for the intermediate-freuqncy signal of satellite being down-converted to base band letter
Number；The channel simulation unit 50 is used for carrying out the baseband signal respectively Doppler's frequency according to the characteristic of channel parameter
Shifting, multi-path shadow decline, additive white noise and amplification Filtering Processing；The radio frequency output unit 60 is used for channel simulation unit
The signal of output is converted into radiofrequency signal output.
Satellite signal simulator of the present invention also includes PC man machine interface 10 and described information acquisition process unit 30, the PC
Man machine interface 10 is used for arranging actual environment Satellite channel model parameters, communication frequency, orbit parameter, terminal parameter and environment
Parameter, and by the satellite channel model parameter, communication frequency, orbit parameter, terminal parameter and ambient parameter；Described information is adopted
Collection processing unit 30 be used for radio frequency input block 40, channel simulation unit 50 and radio frequency output unit 60 are carried out data acquisition,
Analyzing and processing, and result is shown by PC man machine interface 10.
Wherein, the satellite channel model can be Rayleigh channel, Rice channel, C.Loo model, Corazza model or
Lutz model, communication frequency is L-band and any frequency of X-band, and orbit parameter includes semi-major axis of orbit, orbital eccentricity, rail
Road inclination, right ascension of ascending node, argument of perigee, true anomaly, elevation angle size, orbit altitude etc.；Terminal parameter includes longitude, latitude
Degree, the speed of service, ambient parameter includes urban compact region, suburb compared with depletion region, rural open area.Orbit parameter is continuous
Update, and track and the particular location of satellite transit is drawn out in man machine interface；Terminal parameter includes translational speed etc..
According to the orbit parameter provided by PC man machine interface 10, the channel parameter signal generating unit 20 is first according to Kepler
Law calculates the running orbit in satellite in rail, then according to channel model, satellite transit track, terminal parameter and environment
Parameter, calculates characteristic of channel parameter, and carries out frame structure adjustment to parameter, finally the parameter of framing is sent by Ethernet
To channel simulation unit 50.
The radio frequency input block 40 includes A/D modular converter 401 and is connected to the lower change of the A/D modular converter 401
Frequency module 402, the A/D modular converter 401 is used for gathering the intermediate-freuqncy signal of satellite, and the down conversion module 402 is used for institute
State intermediate-freuqncy signal to be down-converted to baseband signal and the baseband signal is sent to the channel simulation unit 50.
The radio frequency output unit 60 includes up-converter module 601 and is connected to the D/A conversion of the up-converter module 601
Module 602, the signal that the up-converter module 601 is used for exporting channel simulation unit 50 carries out upconverting to intermediate-freuqncy signal,
The D/A modular converter 602 is used for for the intermediate-freuqncy signal being converted into radiofrequency signal output.
The characteristic of channel parameter includes satellite in the high dynamic such as relative acceleration very very big feelings of big or relative velocity
The Doppler frequency shift parameter for producing under condition, multi-path shadow fading parameter and wireless transmission link due to reflecting or reflecting generation are produced
Raw additive white noise signal to noise ratio parameter, wherein, the multi-path shadow fading parameter includes multipath number, per road multipath delay and
Per road multipath fading.
Fig. 1 and Fig. 2 is seen also, the channel simulation unit 50 includes that Doppler frequency shift module 501, multi-path shadow declines
Stamping die block 502, additive white noise module 503 and satellite load module 504, the Doppler frequency shift module 501 will be for penetrating
The baseband signal that frequency input block 40 is input into loads Doppler frequency shift parameter and obtains the first signal；The multi-path shadow decline module
502 obtain secondary signal for first signal is multiplied by multi-path shadow fading parameter；The additive noise module 503 is used for
White noise is produced according to additive white noise signal to noise ratio parameter, and the white noise is superimposed with secondary signal is obtained the 3rd signal；
The satellite load module 504 is made up of amplifier submodule 5041 and filter sub-module 5042, for believing the described 3rd
Number Filtering Processing is amplified, and the signal after process is sent to the radio frequency output unit 60.
Wherein, the amplifier submodule 5041 can determine specific amplifier mould according to selected Amplifier type
Type.So, the present invention simulates inside satellite travelling-wave tube amplifier in practice to signal by arranging satellite load module 504
This factor of the non-linear distortion for causing so that the satellite channel of the design more approaching to reality of satellite signal simulator, improves
The accuracy and data reliability of satellite signal simulator work.
Fig. 1 and Fig. 3 is seen also, in the present invention, the multi-path shadow decline module 502 considers multipath effect and the moon
Shadow two kinds of influence factors of decline, wherein, multipath effect is divided into flat fading and two kinds of situations of frequency selective fading, and flatness declines
Fall the indistinguishable multipath combination for being regarded as in being sometime spaced reaching from different incidence angles, when these multipath components
When combination is comprising direct component, the envelope of signal obeys Rice (this decline of Lay) distribution, and (Rayleigh declines otherwise to obey Rayleigh
Fall) distribution.And frequency selective fading is considered as the combination of multiple distinguishable multipaths, each multipath is one and flat declines
Fall, have different fading rates and the path delay of time.The signal envelope of shadow fading obeys Lognormal distribution, and (lognormal is divided
Cloth).
Specifically, the multi-path shadow decline module 502 includes shunt 5021, combiner 5022 and located at described point
N road multipath between road device 5021, combiner 5022, N be natural number, a wherein road multipath by power attenuation submodule 5023,
Multipath fading submodule 5024 and shadow fading submodule 5025 constitute, remaining N-1 road multipath by multidiameter delay submodule 5026,
Power attenuation submodule 5024, multipath fading submodule 5025 and shadow fading submodule 5026 constitute.
The shunt 5021 is used for for the first signal of input being divided into N number of path subsignal, the multidiameter delay submodule
Block 5026 is used for according to multi-path shadow fading parameter Zhong Mei road multipath delay, carries out delay process to multichannel subsignal；Described
Power attenuation submodule 5023 is used for simulating the power attenuation of signal calculated and loading in subsignal；The multipath fading submodule
Block 5024 is used for simulating the multipath fading of signal calculated according to multi-path shadow fading parameter and loading in subsignal；The shade
Decline submodule 5025 is used for simulating the shadow fading (slow fading) of signal calculated according to multi-path shadow fading parameter and loading on
In subsignal；The combiner 5022 is used for will be through power attenuation submodule 5023, multipath fading submodule 5024 and shade
The N way signal of decline submodule 5025 is overlapped forming secondary signal, and the secondary signal is exported additive white noise
Module 503.
Wherein, when each road multipath produces different by multidiameter delay submodule 5026, power attenuation submodule 5024
Prolong, power attenuation, to simulate one group of indistinguishable footpath.Each road multipath is independent auspicious in multipath fading submodule 5025
Profit decline or this decline of Lay carry out the brought channel time-varying characteristics of Doppler frequency spectrum extension in simulating multi-path effect；And, can lead to
Cross and multi-path shadow fading parameter is configured simulating flat fading and frequency selective fading.So, the present invention is to multipath
The simulation of decline, can both be arrowband flat fading, it is also possible to simulate wideband frequency selective decline so that the channel mould of simulation
Type species is more diversified.
Separately, Fig. 4 is referred to, the present invention also provides a kind of above-mentioned satellite signal simulation method, methods described includes following step
Suddenly：
Channel is calculated according to satellite channel model parameter, communication frequency, orbit parameter, terminal parameter and ambient parameter
Characterisitic parameter；
The intermediate-freuqncy signal of satellite is down-converted to baseband signal；
Carry out Doppler frequency shift, multi-path shadow decline to the baseband signal respectively, add according to the characteristic of channel parameter
Property white noise and amplify Filtering Processing and by the baseband signal after process be converted into radiofrequency signal output.
Wherein, the characteristic of channel parameter include Doppler frequency shift parameter that satellite produced under high dynamic, due to reflection
Or the multi-path shadow fading parameter of refraction generation and the additive white noise signal to noise ratio parameter of wireless transmission link generation, wherein, institute
Stating multi-path shadow fading parameter includes multipath number, every road multipath delay and per road multipath fading.
Described it is calculated according to satellite channel model parameter, communication frequency, orbit parameter, terminal parameter and ambient parameter
Also include before characteristic of channel parameter：
Actual environment Satellite channel model parameters, communication frequency, orbit parameter, terminal parameter and ambient parameter are set,
And by the satellite channel model parameter, communication frequency, orbit parameter, terminal parameter and ambient parameter.
Described Doppler frequency shift, multi-path shadow are carried out respectively to the baseband signal according to the characteristic of channel parameter decline
Fall, additive white noise and amplify Filtering Processing and by the baseband signal after process be converted into radiofrequency signal output after also include：
The radiofrequency signal data for exporting are acquired, analyze and process, and result is shown.
Wherein, described according to the characteristic of channel parameter baseband signal is carried out respectively Doppler frequency shift, multipath the moon
Shadow decline, additive white noise and amplification Filtering Processing include：
The baseband signal of radio frequency input block input is loaded Doppler frequency shift parameter and obtains the first signal；
First signal is multiplied by multi-path shadow fading parameter and obtains secondary signal；
White noise is produced according to additive white noise signal to noise ratio parameter, and the white noise is superimposed with secondary signal is obtained the
Three signals；
3rd signal is amplified Filtering Processing.
Wherein, described first signal be multiplied by multi-path shadow fading parameter obtain secondary signal include：
First signal of input is divided into N number of path subsignal, and according to multi-path shadow fading parameter Zhong Mei road multipath
Time delay, carries out delay process to multichannel subsignal；
The power attenuation of simulation signal calculated is simultaneously loaded in subsignal；
The multipath fading of signal calculated is simulated according to multi-path shadow fading parameter and is loaded in subsignal；
The shadow fading of signal calculated is simulated according to multi-path shadow fading parameter and is loaded in subsignal；
N way signal through power attenuation, multipath fading and shadow fading is overlapped forming secondary signal.
Compared to prior art, satellite signal simulator of the present invention and its implementation have the advantages that：
(1) the inside satellite travelling-wave tube amplifier that is simulated in practice by arranging satellite load module is caused to signal
This factor of non-linear distortion, improves accuracy and the data reliability of satellite signal simulator work；
(2) by arranging to multi-path shadow fading parameter, can both be arrowband flat fading, it is also possible to simulate wideband frequency
Selective intensity, makes the channel model species of simulation more diversified.
(3) by being acquired to modules data in hardware components and analyzing and processing, and result is passed through PC
Man machine interface is shown, can be observed impact of the corresponding module to signal to intuitive and convenient, is that system is designed and optimization is carried
Good basis is supplied.
To sum up, satellite signal simulator of the present invention and satellite signal simulation method cause the channel model species that simulates more
Variation, easy to operate directly perceived, improve accuracy and the data reliability of satellite signal simulator work.
Note, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious changes,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although by above example, the present invention is carried out
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
Other Equivalent embodiments more can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (10)
1. a kind of satellite signal simulator, it is characterised in that include：
Channel parameter signal generating unit, for according to satellite channel model parameter, communication frequency, orbit parameter, terminal parameter and ring
Border parameter is calculated characteristic of channel parameter；
Radio frequency input block, for being down-converted to baseband signal by the intermediate-freuqncy signal of satellite；
Channel simulation unit, for carrying out Doppler frequency shift, many respectively according to the characteristic of channel parameter to the baseband signal
Footpath shadow fading, additive white noise and amplification Filtering Processing；
Radio frequency output unit, the signal for exporting channel simulation unit is converted into radiofrequency signal output.
2. satellite signal simulator as claimed in claim 1, it is characterised in that the characteristic of channel parameter includes satellite high dynamic
The Doppler frequency shift parameter for producing under state, multi-path shadow fading parameter and wireless transmission link due to reflecting or reflecting generation are produced
Raw additive white noise signal to noise ratio parameter, wherein, the multi-path shadow fading parameter includes multipath number, per road multipath delay and
Per road multipath fading.
3. satellite signal simulator as claimed in claim 2, it is characterised in that the channel simulation unit includes Doppler frequency shift
Module, multi-path shadow decline module, additive white noise module and satellite load module.
The Doppler frequency shift module is used for for the baseband signal of radio frequency input block input loading Doppler frequency shift parameter
Obtain the first signal；
The multi-path shadow decline module obtains secondary signal for first signal is multiplied by multi-path shadow fading parameter；
The additive noise module is used for producing white noise according to additive white noise signal to noise ratio parameter, and by the white noise and the
Binary signal superposition obtains the 3rd signal；
The satellite load module is made up of amplifier submodule and filter sub-module, for being put the 3rd signal
Big Filtering Processing, and by and the signal after process is sent to the radio frequency output unit.
4. satellite signal simulator as claimed in claim 3, it is characterised in that the multi-path shadow decline module includes branch
Device, combiner and the N road multipath between the shunt, combiner, N is that natural number, wherein a road multipath is by power
Decay submodule, multipath fading submodule and shadow fading submodule composition, remaining N-1 road multipath by multidiameter delay submodule,
Power attenuation submodule, multipath fading submodule and shadow fading submodule composition.
5. satellite signal simulator as claimed in claim 1, it is characterised in that the radio frequency input block includes A/D modulus of conversion
Block and the down conversion module of the A/D modular converter is connected to, the A/D modular converter is used for gathering in satellite equipment output
Frequency signal, the down conversion module is used for the intermediate-freuqncy signal being down-converted to baseband signal and being sent to the baseband signal
The channel simulation unit.
6. satellite signal simulator as claimed in claim 5, it is characterised in that the radio frequency output unit includes up-converter module
And the D/A modular converter of the up-converter module is connected to, the up-converter module is used for the letter of channel simulation unit output
Number carry out upconverting to intermediate-freuqncy signal, the D/A modular converter is used for for the intermediate-freuqncy signal being converted into radiofrequency signal output.
7. a kind of satellite signal simulation method, it is characterised in that the method comprising the steps of：
The characteristic of channel is calculated according to satellite channel model parameter, communication frequency, orbit parameter, terminal parameter and ambient parameter
Parameter；
The intermediate-freuqncy signal of satellite is down-converted to baseband signal；
Doppler frequency shift, multi-path shadow decline, additive white are carried out respectively according to the characteristic of channel parameter to the baseband signal
Noise and amplify Filtering Processing and by the baseband signal after process be converted into radiofrequency signal output.
8. satellite signal simulation method as claimed in claim 7, it is characterised in that the characteristic of channel parameter includes satellite in height
The dynamic lower Doppler frequency shift parameter for producing, multi-path shadow fading parameter and wireless transmission link due to reflecting or reflecting generation
The additive white noise signal to noise ratio parameter of generation, wherein, the multi-path shadow fading parameter includes multipath number, every road multipath delay
With every road multipath fading.
9. satellite signal simulation method as claimed in claim 8, it is characterised in that described according to the characteristic of channel parameter to institute
Stating baseband signal carries out Doppler frequency shift, multi-path shadow decline, additive white noise and amplifies Filtering Processing including respectively：
The baseband signal of radio frequency input block input is loaded Doppler frequency shift parameter and obtains the first signal；
First signal is multiplied by multi-path shadow fading parameter and obtains secondary signal；
White noise is produced according to additive white noise signal to noise ratio parameter, and the white noise is superimposed with secondary signal is obtained the 3rd letter
Number；
3rd signal is amplified Filtering Processing.
10. satellite signal simulation method as claimed in claim 9, it is characterised in that described first signal is multiplied by multipath
Shadow fading parameter obtains secondary signal to be included：
First signal of input is divided into N number of path subsignal, and according to multi-path shadow fading parameter Zhong Mei road multipath delay,
Delay process is carried out to multichannel subsignal；
The power attenuation of simulation signal calculated is simultaneously loaded in subsignal；
The multipath fading of signal calculated is simulated according to multi-path shadow fading parameter and is loaded in subsignal；
The shadow fading of signal calculated is simulated according to multi-path shadow fading parameter and is loaded in subsignal；
N way signal through power attenuation, multipath fading and shadow fading is overlapped forming secondary signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610801360.0A CN106452628A (en) | 2016-09-04 | 2016-09-04 | Satellite signal simulator and satellite signal simulation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610801360.0A CN106452628A (en) | 2016-09-04 | 2016-09-04 | Satellite signal simulator and satellite signal simulation method |
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| CN107196881A (en) * | 2017-05-24 | 2017-09-22 | 北京理工大学 | A kind of high dynamic pulse shaping signal imitation method and apparatus |
| CN107728125A (en) * | 2017-09-29 | 2018-02-23 | 桂林电子科技大学 | The satellite-signal simulation system and application method of a kind of ionospheric scintillation |
| CN108809458A (en) * | 2018-03-26 | 2018-11-13 | 上海聚星仪器有限公司 | A kind of channel simulator and its analogy method based on FPGA |
| CN109450828A (en) * | 2018-11-05 | 2019-03-08 | 北京理工大学 | Signal processing chip |
| CN109495199A (en) * | 2018-10-30 | 2019-03-19 | 航天恒星科技有限公司 | A kind of FPGA parameter testing system based on HWIL simulation |
| CN110356595A (en) * | 2019-06-11 | 2019-10-22 | 北京空间飞行器总体设计部 | A kind of interference scene simulation system for spacecraft orbit dynamic test |
| CN110824508A (en) * | 2019-11-27 | 2020-02-21 | 中国科学院微小卫星创新研究院 | Reconfigurable navigation satellite simulator |
| CN111064503A (en) * | 2019-12-30 | 2020-04-24 | 长光卫星技术有限公司 | Satellite channel high dynamic time delay Doppler simulation system |
| CN111147169A (en) * | 2019-12-27 | 2020-05-12 | 东方红卫星移动通信有限公司 | Modeling model and modeling method for low-orbit satellite space-ground communication channel |
| CN111417160A (en) * | 2020-03-30 | 2020-07-14 | 中国电子科技集团公司第五十四研究所 | Cross-zone switching test method for satellite communication system service station |
| CN112019253A (en) * | 2020-08-10 | 2020-12-01 | 航天科工空间工程发展有限公司 | Ground line feeder test system and method based on low-earth-orbit satellite communication |
| CN112087268A (en) * | 2020-08-17 | 2020-12-15 | 北京航空航天大学 | Typhoon detection application-oriented air-to-air wireless channel simulator |
| CN112087253A (en) * | 2020-08-07 | 2020-12-15 | 中国卫通集团股份有限公司 | Satellite simulator for asymmetric PCMA (Primary packet Access) |
| CN112583496A (en) * | 2020-12-02 | 2021-03-30 | 四川安迪科技实业有限公司 | Satellite communication space link conversion simulation device and method |
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| CN112968742A (en) * | 2020-12-31 | 2021-06-15 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Broadband channel simulation device and method |
| CN113067622A (en) * | 2021-02-25 | 2021-07-02 | 上海卫星工程研究所 | Composite scene multi-source signal generation autonomous deviation correcting device and method |
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| CN115276764A (en) * | 2022-07-06 | 2022-11-01 | 四川创智联恒科技有限公司 | Comprehensive simulation system, method and storage medium for low earth orbit satellite access network system |
| CN115866630A (en) * | 2022-11-25 | 2023-03-28 | 中国电子科技集团公司第十研究所 | Radio measurement and control communication signal multipath effect simulation system and method |
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| CN107196881A (en) * | 2017-05-24 | 2017-09-22 | 北京理工大学 | A kind of high dynamic pulse shaping signal imitation method and apparatus |
| CN107196881B (en) * | 2017-05-24 | 2020-01-07 | 北京理工大学 | High dynamic pulse forming signal simulation method and device |
| CN107728125A (en) * | 2017-09-29 | 2018-02-23 | 桂林电子科技大学 | The satellite-signal simulation system and application method of a kind of ionospheric scintillation |
| CN107728125B (en) * | 2017-09-29 | 2020-03-10 | 桂林电子科技大学 | Ionosphere scintillation satellite signal simulation system and use method |
| CN108809458A (en) * | 2018-03-26 | 2018-11-13 | 上海聚星仪器有限公司 | A kind of channel simulator and its analogy method based on FPGA |
| CN109495199A (en) * | 2018-10-30 | 2019-03-19 | 航天恒星科技有限公司 | A kind of FPGA parameter testing system based on HWIL simulation |
| CN109495199B (en) * | 2018-10-30 | 2021-07-13 | 航天恒星科技有限公司 | FPGA parameter debugging system based on semi-physical simulation |
| CN109450828A (en) * | 2018-11-05 | 2019-03-08 | 北京理工大学 | Signal processing chip |
| CN109450828B (en) * | 2018-11-05 | 2020-05-29 | 北京理工大学 | Signal processing chip |
| CN110356595A (en) * | 2019-06-11 | 2019-10-22 | 北京空间飞行器总体设计部 | A kind of interference scene simulation system for spacecraft orbit dynamic test |
| CN110356595B (en) * | 2019-06-11 | 2020-12-11 | 北京空间飞行器总体设计部 | Interference scene simulation system for spacecraft orbit dynamic test |
| CN110824508A (en) * | 2019-11-27 | 2020-02-21 | 中国科学院微小卫星创新研究院 | Reconfigurable navigation satellite simulator |
| CN111147169A (en) * | 2019-12-27 | 2020-05-12 | 东方红卫星移动通信有限公司 | Modeling model and modeling method for low-orbit satellite space-ground communication channel |
| CN111064503B (en) * | 2019-12-30 | 2021-12-03 | 长光卫星技术有限公司 | Satellite channel high dynamic time delay Doppler simulation system |
| CN111064503A (en) * | 2019-12-30 | 2020-04-24 | 长光卫星技术有限公司 | Satellite channel high dynamic time delay Doppler simulation system |
| CN111417160B (en) * | 2020-03-30 | 2021-12-07 | 中国电子科技集团公司第五十四研究所 | Cross-zone switching test method for satellite communication system service station |
| CN111417160A (en) * | 2020-03-30 | 2020-07-14 | 中国电子科技集团公司第五十四研究所 | Cross-zone switching test method for satellite communication system service station |
| CN112087253A (en) * | 2020-08-07 | 2020-12-15 | 中国卫通集团股份有限公司 | Satellite simulator for asymmetric PCMA (Primary packet Access) |
| CN112019253A (en) * | 2020-08-10 | 2020-12-01 | 航天科工空间工程发展有限公司 | Ground line feeder test system and method based on low-earth-orbit satellite communication |
| CN112087268A (en) * | 2020-08-17 | 2020-12-15 | 北京航空航天大学 | Typhoon detection application-oriented air-to-air wireless channel simulator |
| CN112087268B (en) * | 2020-08-17 | 2021-06-29 | 北京航空航天大学 | Typhoon detection application-oriented air-to-air wireless channel simulator |
| CN112583496A (en) * | 2020-12-02 | 2021-03-30 | 四川安迪科技实业有限公司 | Satellite communication space link conversion simulation device and method |
| CN112583496B (en) * | 2020-12-02 | 2022-10-28 | 四川安迪科技实业有限公司 | Satellite communication space link conversion simulation device and method |
| CN112671488A (en) * | 2020-12-15 | 2021-04-16 | 上海卫星工程研究所 | Spacecraft channel simulation device and application method thereof |
| CN112968742A (en) * | 2020-12-31 | 2021-06-15 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Broadband channel simulation device and method |
| CN112968742B (en) * | 2020-12-31 | 2022-11-25 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Broadband channel simulation device and method |
| CN113067622A (en) * | 2021-02-25 | 2021-07-02 | 上海卫星工程研究所 | Composite scene multi-source signal generation autonomous deviation correcting device and method |
| CN113281791A (en) * | 2021-06-01 | 2021-08-20 | 中国电子科技集团公司第五十四研究所 | Array navigation signal simulator based on channel simulation |
| CN113904744A (en) * | 2021-09-24 | 2022-01-07 | 上海微波技术研究所（中国电子科技集团公司第五十研究所） | Ka-waveband channel simulation system with satellite communication channel simulation function |
| CN115037347A (en) * | 2022-05-11 | 2022-09-09 | 中国人民解放军陆军装甲兵学院 | Dual-band satellite communication simulation transponder |
| CN115276764A (en) * | 2022-07-06 | 2022-11-01 | 四川创智联恒科技有限公司 | Comprehensive simulation system, method and storage medium for low earth orbit satellite access network system |
| CN115866630A (en) * | 2022-11-25 | 2023-03-28 | 中国电子科技集团公司第十研究所 | Radio measurement and control communication signal multipath effect simulation system and method |
| CN115866630B (en) * | 2022-11-25 | 2024-05-14 | 中国电子科技集团公司第十研究所 | Radio measurement control communication signal multipath effect simulation system and method |
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