CN206421030U - A kind of satellite navigation signal simulator - Google Patents
A kind of satellite navigation signal simulator Download PDFInfo
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- CN206421030U CN206421030U CN201720059589.1U CN201720059589U CN206421030U CN 206421030 U CN206421030 U CN 206421030U CN 201720059589 U CN201720059589 U CN 201720059589U CN 206421030 U CN206421030 U CN 206421030U
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Abstract
The utility model is applied to field of satellite navigation, and there is provided a kind of satellite navigation signal simulator.The satellite navigation signal simulator includes processor, physical channel time division multiplexing module, D/A converter module, RF up-converter module and the signal emission module being sequentially connected.Satellite navigation signal simulator of the present utility model can make full use of hardware resource, reduction development cost, portable strong, system easily scalable, the convenient design that many navigation system simulators are realized on same set of hardware platform, is with a wide range of applications for the exploitation of satellite navigation signals receiver, checking, test.In addition, by the satellite-signal for producing continuous multiple navigation system, many navigation system navigation neceiver integrated positionings can be realized, and positioning result can be compared with the track set in simulator, the research available for high-end receiver performance test, research and development and Navigation Signal System.
Description
Technical field
The utility model belongs to field of satellite navigation, more particularly to a kind of satellite navigation signal simulator.
Background technology
Current GNSS (Global Navigation Satellite System, GPS) is mainly wrapped
Include：GPS (Global Positioning System, global positioning system), the GLONASS (GLONASSs of Russia in the U.S.
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 and used, will so 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
Open up the application field of satellite navigation.The navigation system that BD, GPS, Galileo and GLONASS are combined is largely
The limitation of single navigation system can be overcome, allow users to obtain more accurate, more reliable standard positioning services, can undertake
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 received, one is provided reliably, stably, accurately for the design of satellite navigation receiver, development and test
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 realizes, by satellite navigation signal simulator can be with more convenient and flexible
Satellite navigation receiver test is completed, and researching and developing satellite navigation receiver testing expense can be reduced.With China BD2 (
Two generation Beidou satellite navigation systems) comprehensive networking, with multisystem compatibility high dynamic satellite navigation receiver will welcome
New opportunity to develop.
Opened simultaneously however, the design of the satellite navigation signal simulator of prior art is all physical channels, 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 in many navigation system multifrequency points, such as BD2, GPS, Galileo and
Many navigation system of GLONASS combinations, each navigation system respectively has 12 physical channels, that is, has 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, consumption chip it is big
Hardware resource is measured, the satellite navigation signals simulation of many navigation system multifrequency points is difficult to or can not realize in general chip
Device, and it is unfavorable for the upgrading of satellite navigation signal simulator, directly enhance design cost and difficulty.
Utility model content
The purpose of this utility model is to provide a kind of satellite navigation signal simulator, it is intended to solve the satellite of prior art
Navigation signal simulator structure is too fat to move, a large amount of areas for taking chip, consumes the great amount of hardware resources of chip, and be unfavorable for satellite
The upgrading of navigation signal simulator, the problem of improving design cost and difficulty.
The utility model provide a kind of satellite navigation signal simulator, including be sequentially connected processor, physical channel
Be time-multiplexed module, D/A converter module, RF up-converter module and signal emission module；Wherein,
Processor, the parameter of one or more navigation system for receiving user's setting, 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 system, physical channel time division multiplexing mould is sent to by the initial information of the visible star of all navigation system
Block；
Physical channel is time-multiplexed module, for the initial letter of the visible star of all navigation system sent according to processor
Breath, it is using time-multiplexed mode that the actual physics channel time-sharing multiplexing of each navigation system is equivalent into multiple physical channels,
Generation 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 multiplexing module output to be converted to
Analog if signal, and send to RF up-converter module after analog if signal is amplified；
RF up-converter module, the analog if signal for D/A converter module to be sent, which is converted to, meets satellite-signal
The radiofrequency signal of required frequency；
Signal emission module, for launching the radiofrequency signal after RF up-converter resume module.
Further, the physical channel time division multiplexing module specifically includes the multiple memory modules being sequentially connected, time slot
Switching is with control module, intermediate-freuqncy signal generation module corresponding with each actual physics passage, memory array and string and synchronous
Converter, input of the time slot switching with control module respectively with each intermediate-freuqncy signal generation module is connected, each intermediate-freuqncy signal
The output end of generation module is 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 is divided into N number of portion by the initial information of all visible stars of each navigation system respectively with control module
Point, N is greater than or equal to 2 natural number, using N number of time slot as a time division multiplexing cycle, for each navigation system,
The initial information that each time slot extracts the visible star of a part from corresponding memory module respectively is sent to corresponding intermediate-freuqncy signal
Generation module, the digital medium-frequency signal of corresponding time slot is generated by intermediate-freuqncy signal generation module, and is stored into memory array, when
After each time slot terminates, the time slot breakpoint data are preserved to respective stored module, wait next cycle to be cut after arriving by time slot
Change to control module and the corresponding informance in the initial information of the visible star extracted from corresponding memory module is substituted for the breakpoint
Data are sent to corresponding intermediate-freuqncy signal generation module, after n-th time slot terminates, by string and synchronous converter by memory array
The serial digital intermediate-freuqncy signal of the corresponding navigation system of row is converted into parallel digital medium-frequency signal and sent to D/A converter module.
In the utility model, because satellite navigation signal simulator includes physical channel time division multiplexing module, physics leads to
Road time division multiplexing module is equivalent into many by the actual physics channel time-sharing multiplexing of each navigation system using time-multiplexed mode
Individual physical channel, generates multiple Parallel Digital intermediate-freuqncy signals corresponding with each navigation system.Therefore hardware can be made full use of
Resource, reduction development cost, portable strong, system are easily scalable, convenient that many navigation systems are realized on same set of hardware platform
The design of system simulator, is with a wide range of applications for the exploitation of satellite navigation signals receiver, checking, test.In addition, logical
Cross the satellite-signal for producing continuous multiple navigation system, it is possible to achieve many navigation system navigation neceiver integrated positionings, and
Positioning result can be compared with the track set in simulator, available for high-end receiver performance test, research and develop and lead
The research of boat signal system.
Brief description of the drawings
Fig. 1 is the structural representation for the satellite navigation signal simulator that the utility model embodiment is provided.
Fig. 2 is the physical channel time division multiplexing module in the satellite navigation signal simulator that the utility model embodiment is provided
Structural representation.
Embodiment
In order that the purpose of this utility model, technical scheme and beneficial effect are more clearly understood, below in conjunction with accompanying drawing and
Embodiment, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only used to
The utility model is explained, is not used to limit the utility model.
In order to illustrate technical scheme described in the utility model, illustrated below by specific embodiment.
Referring to Fig. 1, the satellite navigation signal simulator that the utility model embodiment is provided includes the processing being sequentially connected
Device 11, physical channel time division multiplexing 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 for receiving user's setting, 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 system, physical channel time division multiplexing is sent to by the initial information of the visible star of all navigation system
Module 12.
In the utility model embodiment, one or more of navigation system can be BD, GPS, GLONASS,
One in Galileo or any combination；Parameter can include ephemeris, user movement scene, user trajectory information etc.；User sets
The parameter for the one or more navigation system put can be being set by host computer or direct in satellite navigation signals
Set in simulator.The parameter of each navigation system can include ephemeris, user movement scene, user trajectory information and corresponding
System emulation initial time etc..The initial information of the visible star of each navigation system can include the corresponding of each navigation system
The corresponding initial integer code phase of visible satellite number, visible satellite, initial small code phase, original carrier phase, code frequency control
Word processed, carrier frequency control word and navigation message etc..Processor 11 can be specifically DSP signal processing modules.
Physical channel is time-multiplexed module 12, at the beginning of the visible star of all navigation system that is sent according to processor 11
Beginning information, is led to the actual physics channel time-sharing multiplexing of each navigation system is equivalent using time-multiplexed mode into multiple physics
Road, generates multiple Parallel Digital intermediate-freuqncy signals corresponding with each navigation system.
Referring to Fig. 2, in the utility model embodiment, physical channel time division multiplexing module 12 can specifically be included successively
Multiple memory modules 121 (in Fig. 2 exemplified by 2) of connection, time slot switching are led to control module 122, with each actual physics
The corresponding intermediate-freuqncy signal generation module 123 in road (in Fig. 2 exemplified by 6), memory array 124 and string and synchronous converter 125,
Input of the time slot switching with control module 122 respectively with each intermediate-freuqncy signal generation module 123 is connected, each intermediate-freuqncy signal life
Output end into module 123 is connected with memory array 124 respectively.Wherein, each memory module can be independent deposits
Reservoir, or, the multiple memory module is the memory module being located in same memory.
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 stars of each navigation system point
Into N number of part, N is greater than or equal to 2 natural number, using N number of time slot as a time division multiplexing cycle, and (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, waits next cycle will be from corresponding by time slot switching and control module 122 after arriving
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 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 sent to D/A converter module 13.
Wherein, breakpoint data specifically can include integer code phase, the carrier frequency digital controlled oscillator of navigation system adds 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 in the initial information of star is substituted for carrier wave
Frequency digital controlled oscillator accumulated value, it is seen that the initial small code phase in the initial information of star is substituted for ranging code frequency numerical control and shaken
Swing device accumulated value.Physical channel time division multiplexing 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 multiplexing module 12 to be exported turns
It is changed to analog if signal, and send to RF up-converter module after analog if signal is amplified.
RF up-converter module 14, the analog if signal for D/A converter module to be sent, which is converted to, meets satellite letter
The radiofrequency signal of frequency required by number.
Signal emission module 15, for launching the radiofrequency signal after RF up-converter resume module.
The analogy method for the satellite navigation signal simulator that the utility model embodiment is provided comprises the following steps：
Step 1: processor receives the parameter for one or more navigation system that user is set, 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 system, physical channel time division multiplexing is sent to by the initial information of the visible star of all navigation system
Module；
Step 2: the visible star for all navigation system that physical channel time division multiplexing module is sent according to processor is initial
Information, is led to the actual physics channel time-sharing multiplexing of each navigation system is equivalent using time-multiplexed mode into multiple physics
Road, generates multiple Parallel Digital intermediate-freuqncy signals corresponding with each navigation system；
In the utility model embodiment, 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 is divided into N number of portion by the initial information of all visible stars of each navigation system respectively with control module
Point, N is greater than or equal to 2 natural number, using N number of time slot as a time division multiplexing 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, and the numeral of corresponding time slot is generated 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, waits next cycle to switch at the beginning of the visible star extracted from corresponding memory module after arriving by time slot to control module
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 knot
The serial digital intermediate-freuqncy signal of the corresponding navigation system of memory array, is converted into parallel by Shu Hou by string and synchronous converter
Digital medium-frequency signal is sent to D/A converter module.
The parallel digital medium-frequency signal conversion of module output Step 3: physical channel is time-multiplexed by D/A converter module
For analog if signal, and send to RF up-converter module after analog if signal is amplified；
Step 4: RF up-converter module, which is converted to the analog if signal that D/A converter module is sent, meets satellite letter
The radiofrequency signal of frequency required by number；
Step 5: signal emission module launches the radiofrequency signal after RF up-converter resume module.
In the utility model embodiment, it is assumed that the processor in satellite navigation signal simulator have received 4 navigation systems
The parameter of system, such as BD, GPS, GLONASS and Galileo, each navigation system have 12 visible stars, by each navigation system
The initial informations of all visible stars be divided into 4 parts, using 4 time slots as a time division multiplexing cycle, then for each
Navigation system, the initial information of every three visible stars is extracted from corresponding memory module respectively as a part in each time slot
The initial information of the visible star of one part is sent to corresponding intermediate-freuqncy signal generation module, i.e. each navigation system uses 3 altogether
Individual intermediate-freuqncy signal generation module, the digital medium-frequency signal of corresponding time slot is generated by intermediate-freuqncy signal generation module, and is stored to storage
In device array, after the 4th time slot terminates, 3 of the corresponding navigation system of memory array are gone here and there by string and synchronous converter
Row digital medium-frequency signal is converted into 12 parallel digital medium-frequency signals, launches eventually through signal emission module.That is this practicality
The satellite navigation signal simulator of new embodiment generates 48 signals using 12 intermediate-freuqncy signal generation modules.However, such as
Fruit uses the satellite navigation signal simulator of prior art, and each navigation system need to use 12 intermediate-freuqncy signal generation modules, then
48 intermediate-freuqncy signal generation modules are needed altogether.By comparing, using the satellite navigation signals mould of the utility model embodiment
Intend device, hardware resource, reduction development cost, portable strong, system can be made full use of easily scalable, it is convenient same set of hard
The design of many navigation system simulators is realized on part platform, is had for the exploitation of satellite navigation signals receiver, checking, test wide
General application prospect.In addition, being believed by the satellite for producing continuous tetra- navigation system of BD2/GPS/GLONASS/Galileo
Number, it is possible to achieve the navigation system navigation neceiver integrated positionings of BD2/GPS/GLONASS/Galileo tetra-, and positioning result can
To be compared with the track set in simulator, available for high-end receiver performance test, research and development and Navigation Signal System
Research.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Any modifications, equivalent substitutions and improvements made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (7)
1. a kind of satellite navigation signal simulator, it is characterised in that including be sequentially connected processor, physical channel time division multiplexing
Module, D/A converter module, RF up-converter module and signal emission module；Wherein,
Processor, the parameter of one or more navigation system for receiving user's setting, 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 star, physical channel time division multiplexing module is sent to by the initial information of the visible star of all navigation system；
Physical channel is time-multiplexed module, for the initial information of the visible star of all navigation system sent according to processor,
It is using time-multiplexed mode that the actual physics channel time-sharing multiplexing of each navigation system is equivalent into multiple physical channels, generation
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 multiplexing module output to be converted into simulation
Intermediate-freuqncy signal, and send to RF up-converter module after analog if signal is amplified；
RF up-converter module, the analog if signal for D/A converter module to be sent, which is converted to, to be met satellite-signal and wants
The radiofrequency signal for the frequency asked；
Signal emission module, for launching the radiofrequency signal 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 any combination.
3. satellite navigation signal simulator as claimed in claim 1, it is characterised in that it is one or more that the user is set
The parameter of navigation system is set by host computer, or directly set in satellite navigation signal simulator.
4. satellite navigation signal simulator as claimed in claim 1, it is characterised in that the processor is DSP signal transactings
Module.
5. satellite navigation signal simulator as claimed in claim 1, it is characterised in that the physical channel time division multiplexing module
It is FPGA signal processing modules.
6. the satellite navigation signal simulator as described in any one of claim 1 to 5, it is characterised in that during the physical channel
Divide Multiplexing module to specifically include the multiple memory modules being sequentially connected, time slot switching with control module, with each actual physics to lead to
The corresponding intermediate-freuqncy signal generation module in road, memory array and string and synchronous converter, time slot switching with control module respectively with
The input connection of each intermediate-freuqncy signal generation module, the output end of each intermediate-freuqncy signal generation module respectively with memory array
Connection；
Each memory module stores the initial information of the visible star of a navigation system of processor transmission respectively；
Time slot switches is divided into N number of part by the initial information of all visible stars of each navigation system respectively with control module, and N is
Natural number more than or equal to 2, using N number of time slot as a time division multiplexing cycle, for each navigation system, when each
The initial information that gap extracts the visible star of a part from corresponding memory module respectively is sent to corresponding intermediate-freuqncy signal generation mould
Block, the digital medium-frequency signal of corresponding time slot is generated by intermediate-freuqncy signal generation module, and is stored into memory array, when each
After gap terminates, the time slot breakpoint data are preserved to respective stored module, wait next cycle to switch after arriving by time slot with controlling
Corresponding informance in the initial information of the visible star extracted from corresponding memory module is substituted for breakpoint data hair by molding block
Corresponding intermediate-freuqncy signal generation module is given, after n-th time slot terminates, by string and synchronous converter by the phase of memory array
Answer the serial digital intermediate-freuqncy signal of navigation system to be converted into parallel digital medium-frequency signal to send to D/A converter module.
7. satellite navigation signal simulator as claimed in claim 6, it is characterised in that each memory module is independent
Memory, or, the multiple memory module is the memory module being located in same memory.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526624A (en) * | 2017-01-18 | 2017-03-22 | 桂林电子科技大学 | Satellite navigation signal simulator and simulation method thereof |
| CN108761455A (en) * | 2018-04-24 | 2018-11-06 | 桂林电子科技大学 | Inverse synthetic aperture radar imaging resource-adaptive dispatching method in networking |
| 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 |
-
2017
- 2017-01-18 CN CN201720059589.1U patent/CN206421030U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526624A (en) * | 2017-01-18 | 2017-03-22 | 桂林电子科技大学 | Satellite navigation signal simulator and simulation method thereof |
| CN106526624B (en) * | 2017-01-18 | 2023-08-15 | 桂林电子科技大学 | Satellite navigation signal simulator and simulation method thereof |
| CN108761455A (en) * | 2018-04-24 | 2018-11-06 | 桂林电子科技大学 | Inverse synthetic aperture radar imaging resource-adaptive dispatching method in networking |
| CN108761455B (en) * | 2018-04-24 | 2021-06-11 | 桂林电子科技大学 | Inverse synthetic aperture radar imaging resource self-adaptive scheduling method in networking |
| 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 |
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