CN106526624A - Satellite navigation signal simulator and simulation method thereof - Google Patents
Satellite navigation signal simulator and simulation method thereof Download PDFInfo
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- CN106526624A CN106526624A CN201710036823.3A CN201710036823A CN106526624A CN 106526624 A CN106526624 A CN 106526624A CN 201710036823 A CN201710036823 A CN 201710036823A CN 106526624 A CN106526624 A CN 106526624A
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Radar, Positioning & Navigation (AREA)
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Abstract
The invention is suitable for the satellite navigation field and provides a satellite navigation signal simulator and a simulation method thereof. The satellite navigation signal simulator comprises a processor, a physical channel time division multiplexing module, a digital-to-analog conversion module, a radio-frequency up-conversion module and a signal emission module which are successively connected. By using the satellite navigation signal simulator, hardware resources can be fully used, exploitation cost is reduced, transportability is high, the system is easy to upgrade, and designs of the plurality of navigation system simulators are conveniently realized on a same set of hardware platform. The simulator has a wide application prospect in fields of satellite navigation signal receiver exploitation, verification and testing. Besides, through generating continuous satellite signals of a plurality of navigation systems, navigation receiver combination positioning of the plurality of navigation systems can be realized, and a positioning result can be compared with a track set in the simulator and can be used for high-end receiver performance testing, research and development, and navigation signal system research.
Description
Technical field
The invention belongs to field of satellite navigation, more particularly to a kind of satellite navigation signal simulator and its analogy method.
Background technology
Current GNSS (Global Navigation Satellite System, GPS) is mainly wrapped
Include：The GPS (Global Positioning System, global positioning system) in the U.S., Muscovite GLONASS (GLONASSs
Satellite navigation system), the BD (Beidou satellite navigation system) of China and European Galileo (Galilean satellite alignment system),
In order to meet higher navigation and positioning accuracy requirement and performance requirement, multiple navigation system are combined use, will so be increased
Plus the observed quantity of navigator fix, improve the quality of navigator fix service, it is possible to improve the positioning performance of integrated navigation system, expand
The application of exhibition satellite navigation.The navigation system that BD, GPS, Galileo and GLONASS are combined is to a great extent
The limitation of single navigation system can be overcome, allowed users to obtain more accurate, more reliable standard positioning services, can be undertaken
The task that many single navigation system can not be completed, but the fusion of the satellite navigation signal simulator of many navigation system can take
Substantial amounts of hardware resource.
Satellite navigation signal simulator can accurately generate and reappear satellite navigation receiver radio-frequency front-end under different condition
The multiple-link satellite signal for receiving, for the design of satellite navigation receiver, develops and test provides a reliability, stable, accurate
With easy-to-use test environment so that the efficiency of research and development of satellite navigation receiver is ensured.In military field, satellite navigation connects
Receipts machine is often installed on the carrier with very big speed, acceleration and acceleration such as aircraft, guided missile and rocket, therefore is defended
The test of star navigation neceiver can not possibly be carried out in practical situations both, and this complicated high dynamic environment can only be by means of with height
The satellite navigation signal simulator of dynamic characteristic, can be with more convenient and flexible by satellite navigation signal simulator realizing
Satellite navigation receiver test is completed, and researching and developing satellite navigation receiver testing expense can be reduced.With China BD2 (
Secondary Beidou satellite navigation system) comprehensive networking, with multisystem compatibility high dynamic satellite navigation receiver will welcome
New opportunity to develop.
However, the design of the satellite navigation signal simulator of prior art is all physical channels while opening, and mutually not
The generating mode of interference, i.e. signal parallel are produced, and this mode can apply to the design of single mode satellite navigation signal simulator,
But in the design process of the satellite navigation signal simulator of many navigation system multifrequency point, such as BD2, GPS, Galileo and
Many navigation system of GLONASS combinations, each navigation system respectively have 12 physical channels, that is, have 48 physical channels, excessively
Physical channel excessively redundancy, satellite navigation signal simulator structure is too fat to move, a large amount of areas for taking chips, consumes the big of chip
Amount hardware resource, is difficult to or can not realize the satellite navigation signals simulation of many navigation system multifrequency point in general chip
Device, and it is unfavorable for the upgrading of satellite navigation signal simulator, directly enhance design cost and difficulty.
The content of the invention
It is an object of the invention to provide a kind of satellite navigation signal simulator and its analogy method, it is intended to solve existing skill
The satellite navigation signal simulator structure of art is too fat to move, a large amount of areas for taking chip, the great amount of hardware resources of consumption chip, and not
Beneficial to the upgrading of satellite navigation signal simulator, the problem of design cost and difficulty is improve.
In a first aspect, the invention provides a kind of satellite navigation signal simulator, including the processor, physics that are sequentially connected
Passage time division multiplex module, D/A converter module, RF up-converter module and signal emission module；Wherein,
Processor, the parameter of one or more navigation system arranged for receive user, according to each navigation system
Parameter calculates the raw information of each navigation system, and respectively obtains each navigation system according to the raw information of each navigation system
The initial information of the visible star of all navigation system is sent to physical channel time division multiplex mould by the initial information of the visible star of system
Block；
Physical channel time division multiplex module, the initial letter of the visible star of all navigation system for being sent according to processor
Breath, using time-multiplexed mode by the actual physics channel time-sharing multiplexing of each navigation system equivalent into multiple physical channels,
Generate multiple Parallel Digital intermediate-freuqncy signals corresponding with each navigation system；
D/A converter module, for the parallel digital medium-frequency signal of physical channel time division multiplex module output is converted to
Analog if signal, and send after analog if signal is amplified to RF up-converter module；
RF up-converter module, the analog if signal for D/A converter module is sent are converted to and meet satellite-signal
The radiofrequency signal of required frequency；
Signal emission module, for launching the radiofrequency signal Jing after RF up-converter resume module.
Second aspect, the invention provides a kind of analogy method of satellite navigation signal simulator, methods described includes：
The parameter of one or more navigation system that processor receive user is arranged, according to the parameter meter of each navigation system
Calculate the raw information of each navigation system, and according to the raw information of each navigation system respectively obtain each navigation system can
See the initial information of star, the initial information of the visible star of all navigation system is sent to into physical channel time division multiplex module；
The initial information of the visible star of all navigation system that physical channel time division multiplex module is sent according to processor, adopts
With time-multiplexed mode by the actual physics channel time-sharing multiplexing of each navigation system equivalent into multiple physical channels, generate with
The corresponding multiple Parallel Digital intermediate-freuqncy signals of each navigation system；
The parallel digital medium-frequency signal of physical channel time division multiplex module output is converted to simulation by D/A converter module
Intermediate-freuqncy signal, and send after analog if signal is amplified to RF up-converter module；
The analog if signal that D/A converter module sends is converted to RF up-converter module to meet satellite-signal wanted
The radiofrequency signal of the frequency asked；
Signal emission module launches the radiofrequency signal Jing after RF up-converter resume module.
In the present invention, as satellite navigation signal simulator includes physical channel time division multiplex module, during physical channel
Multiplexing module is divided to adopt time-multiplexed mode by the actual physics channel time-sharing multiplexing of each navigation system equivalent into multiple things
Reason passage, generates multiple Parallel Digital intermediate-freuqncy signals corresponding with each navigation system.Therefore can make full use of hardware resource,
Reduce development cost, portable strong, system easily scalable, it is convenient that many navigation system simulations are realized on same set of hardware platform
The design of device, for the exploitation of satellite navigation signals receiver, checking, test are with a wide range of applications.In addition, by producing
The satellite-signal of continuous multiple navigation system, it is possible to achieve many navigation system navigation neceiver integrated positionings, and position knot
Fruit can be compared with the track that sets in simulator, can be used for high-end receiver performance test, research and development and navigation signal
The research of system.
Description of the drawings
Fig. 1 is the structural representation of satellite navigation signal simulator provided in an embodiment of the present invention.
Fig. 2 is the knot of the physical channel time division multiplex module in satellite navigation signal simulator provided in an embodiment of the present invention
Structure schematic diagram.
Specific embodiment
In order that the purpose of the present invention, technical scheme and beneficial effect become more apparent, below in conjunction with accompanying drawing and enforcement
Example, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only to explain this
It is bright, it is not intended to limit the present invention.
In order to illustrate technical solutions according to the invention, illustrate below by specific embodiment.
Refer to Fig. 1, processor 11 that satellite navigation signal simulator provided in an embodiment of the present invention includes being sequentially connected,
Physical channel time division multiplex module 12, D/A converter module 13, RF up-converter module 14 and signal emission module 15；Wherein,
Processor 11, the parameter of one or more navigation system arranged for receive user, according to each navigation system
Parameter calculate the raw information of each navigation system, and each navigation is respectively obtained according to the raw information of each navigation system
The initial information of the visible star of all navigation system is sent to physical channel time division multiplex by the initial information of the visible star of system
Module 12.
In embodiments of the present invention, during one or more of navigation system can be BD, GPS, GLONASS, Galileo
One or combination in any；Parameter can include ephemeris, user movement scene, user trajectory information etc.；One of user's setting
Or the parameter of multiple navigation system can be arranged by host computer, or direct in satellite navigation signal simulator
Arrange.The parameter of each navigation system can be imitative including ephemeris, user movement scene, user trajectory information and corresponding system
True initial time etc..The initial information of the visible star of each navigation system can include the corresponding visible satellite of each navigation system
Number, the corresponding initial integer code phase of visible satellite, initial little code phase, original carrier phase place, code frequency control word, carrier wave
Frequency control word and navigation message etc..Processor 11 can be specifically DSP signal processing modules.
Physical channel time division multiplex module 12, for the visible star of all navigation system that sent according to processor 11 just
Beginning information, is led to the actual physics channel time-sharing multiplexing of each navigation system equivalent into multiple physics using time-multiplexed mode
Road, generates multiple Parallel Digital intermediate-freuqncy signals corresponding with each navigation system.
Fig. 2 is referred to, in embodiments of the present invention, physical channel time division multiplex module 12 can specifically include being sequentially connected
Multiple memory modules 121 (in Fig. 2 as a example by 2), time slot switching and control module 122, and each actual physics passage pair
Intermediate-freuqncy signal generation module 123 (in Fig. 2 as a example by 6), memory array 124 and string the synchronous converter 125 answered, time slot
Switching is connected with the input of each intermediate-freuqncy signal generation module 123 respectively with control module 122, and each intermediate-freuqncy signal generates mould
The outfan of block 123 is connected with memory array 124 respectively.Wherein, described each memory module can be independent memorizer,
Or, the plurality of memory module is the memory module in same memorizer.
Each memory module 121 stores the initial information of the visible star of a navigation system of the transmission of processor 11 respectively；
Time slot switches and control module 122, for respectively by the initial information of all visible star of each navigation system point
Into N number of part, N is greater than or equal to 2 natural number, and using N number of time slot as a time division multiplex cycle, (N is bigger, multiplexing
Degree is higher, takes resource fewer), for each navigation system, one is extracted from corresponding memory module 121 respectively in each time slot
The initial information of partial visible star is sent to corresponding intermediate-freuqncy signal generation module 123, is given birth to by intermediate-freuqncy signal generation module 123
Into the digital medium-frequency signal of corresponding time slot, and store into memory array 124, after each time slot terminates, the time slot is broken
Point data is preserved to respective stored module 121, will be from corresponding by time slot switching and control module 122 after waiting next cycle to arrive
Corresponding informance in the initial information of the visible star extracted in memory module 121 be substituted for the breakpoint data be sent to it is corresponding in
Frequency signal generation module 123, after n-th time slot terminates, by string and synchronous converter 125 is by the corresponding of memory array 124
The serial digital intermediate-freuqncy signal of navigation system is converted into parallel digital medium-frequency signal and sends to D/A converter module 13.
Wherein, breakpoint data can specifically include that the integer code phase of navigation system, carrier frequency digital controlled oscillator add up
Value, ranging code frequency digital controlled oscillator accumulated value, and navigation message bit number.It can be seen that the initial integer in the initial information of star
Code phase is substituted for the integer code phase in breakpoint data, it is seen that the original carrier phase place in the initial information of star is substituted for carrier wave
Frequency digital controlled oscillator accumulated value, it is seen that the initial little code phase in the initial information of star is substituted for ranging code frequency numerical control and shakes
Swing device accumulated value.Physical channel time division multiplex module 12 can be specifically FPGA signal processing modules.
D/A converter module 13, the parallel digital medium-frequency signal for physical channel time division multiplex module 12 is exported turn
Analog if signal is changed to, and is sent after analog if signal is amplified to RF up-converter module.
RF up-converter module 14, the analog if signal for D/A converter module is sent are converted to and meet satellite letter
The radiofrequency signal of the frequency required by number.
Signal emission module 15, for launching the radiofrequency signal Jing after RF up-converter resume module.
The analogy method of satellite navigation signal simulator provided in an embodiment of the present invention is comprised the following steps：
The parameter of one or more navigation system that step one, processor receive user are arranged, according to each navigation system
Parameter calculate the raw information of each navigation system, and each navigation is respectively obtained according to the raw information of each navigation system
The initial information of the visible star of all navigation system is sent to physical channel time division multiplex by the initial information of the visible star of system
Module；
The visible star of all navigation system that step 2, physical channel time division multiplex module are sent according to processor it is initial
Information, is led to the actual physics channel time-sharing multiplexing of each navigation system equivalent into multiple physics using time-multiplexed mode
Road, generates multiple Parallel Digital intermediate-freuqncy signals corresponding with each navigation system；
In embodiments of the present invention, step 2 specifically includes following steps：
Each memory module stores the initial information of the visible star of a navigation system of processor transmission respectively；
Time slot switches and the initial information of all visible star of each navigation system is divided into N number of portion by control module respectively
Point, N is greater than or equal to 2 natural number, using N number of time slot as a time division multiplex cycle, (N is bigger, and reusing degree is higher,
Take resource fewer), for each navigation system, a part is extracted from corresponding memory module respectively in each time slot
The initial information of star is sent to corresponding intermediate-freuqncy signal generation module, generates the numeral of corresponding time slot by intermediate-freuqncy signal generation module
Intermediate-freuqncy signal, and store into memory array, after each time slot terminates, the time slot breakpoint data are preserved to respective stored
Module, is switched at the beginning of the visible star extracted from corresponding memory module to control module by time slot after waiting next cycle to arrive
Corresponding informance in beginning information is substituted for the breakpoint data and is sent to corresponding intermediate-freuqncy signal generation module, when n-th time slot is tied
Shu Hou, by string and synchronous converter the serial digital intermediate-freuqncy signal of the corresponding navigation system of memory array is converted into it is parallel
Digital medium-frequency signal is sent to D/A converter module.
The parallel digital medium-frequency signal of physical channel time division multiplex module output is changed by step 3, D/A converter module
For analog if signal, and send after analog if signal is amplified to RF up-converter module；
The analog if signal that D/A converter module sends is converted to and meets satellite letter by step 4, RF up-converter module
The radiofrequency signal of the frequency required by number；
The radiofrequency signal of step 5, signal emission module transmitting Jing after RF up-converter resume module.
In embodiments of the present invention, it is assumed that the processor in satellite navigation signal simulator have received 4 navigation system
Parameter, such as BD, GPS, GLONASS and Galileo, each navigation system have 12 visible stars, by the institute of each navigation system
The initial information for having visible star is divided into 4 parts, using 4 time slots as a time division multiplex cycle, then navigates for each
System, the initial information per three visible stars respectively from corresponding memory module extract one in each time slot as a part
The initial information of partial visible star is sent to corresponding intermediate-freuqncy signal generation module, i.e. each navigation system is altogether using in 3
Frequency signal generation module, generates the digital medium-frequency signal of corresponding time slot by intermediate-freuqncy signal generation module, and stores to memory array
In row, after the 4th time slot terminates, by string and synchronous converter is by 3 serial numbers of the corresponding navigation system of memory array
Word intermediate-freuqncy signal is converted into 12 parallel digital medium-frequency signals, launches eventually through signal emission module.I.e. the present invention is implemented
The satellite navigation signal simulator of example generates 48 signals using 12 intermediate-freuqncy signal generation modules.If however, using existing
There is the satellite navigation signal simulator of technology, each navigation system need to adopt 12 intermediate-freuqncy signal generation modules, then need 48 altogether
Individual intermediate-freuqncy signal generation module.By comparing, using the satellite navigation signal simulator of the embodiment of the present invention, can be abundant
It is easily scalable using hardware resource, reduction development cost, portable strong, system, it is convenient to realize on same set of hardware platform
The design of many navigation system simulators, before the exploitation of satellite navigation signals receiver, checking, test are had a wide range of applications
Scape.In addition, the satellite-signal by producing continuous tetra- navigation system of BD2/GPS/GLONASS/Galileo, it is possible to achieve
Tetra- navigation system navigation neceiver integrated positionings of BD2/GPS/GLONASS/Galileo, and positioning result can be with simulator
The track of middle setting is compared, and can be used for high-end receiver performance test, research and development and the research of Navigation Signal System.
One of ordinary skill in the art will appreciate that all or part of step in realizing above-described embodiment method can be
Instruct related hardware to complete by program, described program can be stored in a computer read/write memory medium,
Described storage medium, such as ROM/RAM, disk, CD etc..
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of satellite navigation signal simulator, it is characterised in that including the processor, physical channel time division multiplex that are sequentially connected
Module, D/A converter module, RF up-converter module and signal emission module；Wherein,
Processor, the parameter of one or more navigation system arranged for receive user, according to the parameter of each navigation system
The raw information of each navigation system is calculated, and each navigation system is respectively obtained according to the raw information of each navigation system
It can be seen that the initial information of the visible star of all navigation system is sent to physical channel time division multiplex module by the initial information of star；
Physical channel time division multiplex module, the initial information of the visible star of all navigation system for being sent according to processor,
Generated the actual physics channel time-sharing multiplexing of each navigation system equivalent into multiple physical channels using time-multiplexed mode
Multiple Parallel Digital intermediate-freuqncy signals corresponding with each navigation system；
D/A converter module, for the parallel digital medium-frequency signal of physical channel time division multiplex module output is converted to simulation
Intermediate-freuqncy signal, and send after analog if signal is amplified to RF up-converter module；
RF up-converter module, the analog if signal for D/A converter module is sent are converted to that to meet satellite-signal wanted
The radiofrequency signal of the frequency asked；
Signal emission module, for launching the radiofrequency signal Jing after RF up-converter resume module.
2. satellite navigation signal simulator as claimed in claim 1, it is characterised in that one or more of navigation system are
One in BD, GPS, GLONASS, Galileo or combination in any.
3. satellite navigation signal simulator as claimed in claim 1, it is characterised in that the user arrange one or more
The parameter of navigation system is arranged by host computer, or directly arrange in satellite navigation signal simulator.
4. satellite navigation signal simulator as claimed in claim 1, it is characterised in that the parameter includes ephemeris, Yong Huyun
Dynamic scene and user trajectory information, the parameter of each navigation system include ephemeris, user movement scene, user trajectory information
And corresponding system emulation initial time.
5. satellite navigation signal simulator as claimed in claim 4, it is characterised in that the visible star of each navigation system
Initial information include the corresponding initial integer code phase of the corresponding visible satellite number of each navigation system, visible satellite, initial
Little code phase, original carrier phase place, code frequency control word, carrier frequency control word and navigation message.
6. satellite navigation signal simulator as claimed in claim 1, it is characterised in that the physical channel time division multiplex module
Specifically include be sequentially connected multiple memory modules, time slot switching it is corresponding with each actual physics passage with control module in
Frequency signal generation module, memory array and string synchronous converter, time slot switching are believed with each intermediate frequency respectively with control module
The input connection of number generation module, the outfan of each intermediate-freuqncy signal generation module are connected with memory array respectively；
Each memory module stores the initial information of the visible star of a navigation system of processor transmission respectively；
Time slot switches and the initial information of all visible star of each navigation system is divided into N number of part by control module respectively, and N is
Natural number more than or equal to 2, using N number of time slot as a time division multiplex cycle, for each navigation system, at each
Gap is extracted the initial information of the visible star of a part respectively and is sent to corresponding intermediate-freuqncy signal generation mould from corresponding memory module
Block, generates the digital medium-frequency signal of corresponding time slot by intermediate-freuqncy signal generation module, and stores into memory array, when each
After gap terminates, the time slot breakpoint data are preserved to respective stored module, by time slot switching and control after waiting next cycle to arrive
Corresponding informance in the initial information of the visible star extracted from corresponding memory module is substituted for the breakpoint data and is sent out by molding block
Corresponding intermediate-freuqncy signal generation module is given, after n-th time slot terminates, by string and synchronous converter is by the phase of memory array
The serial digital intermediate-freuqncy signal of navigation system is answered to be converted into parallel digital medium-frequency signal and send to D/A converter module.
7. satellite navigation signal simulator as claimed in claim 6, it is characterised in that the breakpoint data include navigation system
Integer code phase, carrier frequency digital controlled oscillator accumulated value, ranging code frequency digital controlled oscillator accumulated value and navigation message
Bit number.
8. satellite navigation signal simulator as claimed in claim 7, it is characterised in that in the initial information of the visible star
Corresponding informance is substituted for the breakpoint data and is specially：It can be seen that the initial integer code phase in the initial information of star is substituted for breakpoint number
Integer code phase according in, it is seen that the original carrier phase place in the initial information of star is substituted for carrier frequency digital controlled oscillator and adds up
Value, it is seen that the initial little code phase in the initial information of star is substituted for ranging code frequency digital controlled oscillator accumulated value.
9. a kind of analogy method of the satellite navigation signal simulator as described in any one of claim 1 to 8, it is characterised in that
Methods described includes：
The parameter of one or more navigation system that processor receive user is arranged, calculates every according to the parameter of each navigation system
The raw information of individual navigation system, and the visible star of each navigation system is respectively obtained according to the raw information of each navigation system
Initial information, the initial information of the visible star of all navigation system is sent to into physical channel time division multiplex module；
The initial information of the visible star of all navigation system that physical channel time division multiplex module is sent according to processor, using when
Divide the mode being multiplexed by the actual physics channel time-sharing multiplexing of each navigation system equivalent into multiple physical channels, generate and each
The corresponding multiple Parallel Digital intermediate-freuqncy signals of navigation system；
The parallel digital medium-frequency signal of physical channel time division multiplex module output is converted to analog intermediate frequency by D/A converter module
Signal, and send after analog if signal is amplified to RF up-converter module；
The analog if signal that D/A converter module sends is converted to and is met required by satellite-signal by RF up-converter module
The radiofrequency signal of frequency；
Signal emission module launches the radiofrequency signal Jing after RF up-converter resume module.
10. method as claimed in claim 9, it is characterised in that the step of physical channel time division multiplex module is performed has
Body includes：
Each memory module stores the initial information of the visible star of a navigation system of processor transmission respectively；
Time slot switches and the initial information of all visible star of each navigation system is divided into N number of part by control module respectively, and N is
Natural number more than or equal to 2, using N number of time slot as a time division multiplex cycle, for each navigation system, at each
Gap is extracted the initial information of the visible star of a part respectively and is sent to corresponding intermediate-freuqncy signal generation mould from corresponding memory module
Block, generates the digital medium-frequency signal of corresponding time slot by intermediate-freuqncy signal generation module, and stores into memory array, when each
After gap terminates, the time slot breakpoint data are preserved to respective stored module, by time slot switching and control after waiting next cycle to arrive
Corresponding informance in the initial information of the visible star extracted from corresponding memory module is substituted for the breakpoint data and is sent out by molding block
Corresponding intermediate-freuqncy signal generation module is given, after n-th time slot terminates, by string and synchronous converter is by the phase of memory array
The serial digital intermediate-freuqncy signal of navigation system is answered to be converted into parallel digital medium-frequency signal and send to D/A converter module.
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| CN107367739A (en) * | 2017-07-20 | 2017-11-21 | 中国电子科技集团公司第二十九研究所 | A kind of GLONASS civil navigation signals simulation production method and device |
| CN107911160A (en) * | 2017-04-20 | 2018-04-13 | 武汉大学 | Beidou satellite navigation signal large-scale parallel real-time Transmission method and system |
| CN108680935A (en) * | 2018-05-15 | 2018-10-19 | 北京遥测技术研究所 | A kind of portable production multisystem satellite navigation analogue system |
| CN108873021A (en) * | 2017-05-08 | 2018-11-23 | 海宁爱思迪阿微电子技术有限公司 | Emulation mode/system, emulator and the simulator of navigation satellite ephemeris |
| CN109407116A (en) * | 2018-11-20 | 2019-03-01 | 桂林电子科技大学 | A kind of multi-frequency-point satellite navigation quality test signal generating apparatus and generation method |
| CN110531384A (en) * | 2019-08-20 | 2019-12-03 | 桂林电子科技大学 | A kind of Galilean satellite signal imitation system and its analogy method |
| 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 |
| CN110907965A (en) * | 2019-11-27 | 2020-03-24 | 中国科学院微小卫星创新研究院 | Navigation task processor simulator and implementation method thereof |
| CN111901470A (en) * | 2019-05-06 | 2020-11-06 | 千寻位置网络有限公司 | Terminal testing method and system |
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