CN113805205A - True satellite signal simulation device, method, equipment and medium based on starry sky - Google Patents
True satellite signal simulation device, method, equipment and medium based on starry sky Download PDFInfo
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- CN113805205A CN113805205A CN202111365538.9A CN202111365538A CN113805205A CN 113805205 A CN113805205 A CN 113805205A CN 202111365538 A CN202111365538 A CN 202111365538A CN 113805205 A CN113805205 A CN 113805205A
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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
- G01S19/03—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
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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
- G01S19/35—Constructional details or hardware or software details of the signal processing chain
- G01S19/37—Hardware or software details of the signal processing chain
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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
- G01S19/03—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
- G01S19/10—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing dedicated supplementary positioning signals
- G01S19/11—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing dedicated supplementary positioning signals wherein the cooperating elements are pseudolites or satellite radio beacon positioning system signal repeaters
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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
Abstract
The application discloses a true satellite signal simulation device, a true satellite signal simulation method, true satellite signal simulation equipment and a true satellite signal simulation medium based on babysbreath, wherein the device comprises N babysbreath satellite signal unified devices, each babysbreath satellite signal unified device comprises a navigation signal generation channel capable of outputting twelve paths of simulation navigation signals, the navigation signal generation channel is used for generating 12 paths of N paths of full-system full-frequency point satellite navigation signals according to satellite signal simulation control parameters, and the phase is switched and output according to needs after the satellite navigation signals at the current moment and the satellite navigation signals at the next moment are generated simultaneously at the current moment to realize signal output and continuous and non-hopping. The navigation signal simulation device solves the technical problems of complex cascade, high cost, low reliability and discontinuous signal output of the conventional navigation signal simulation device.
Description
Technical Field
The present application relates to the field of satellite navigation simulation technologies, and in particular, to a device, a method, an apparatus, and a medium for simulating true satellite signals based on babysbreath.
Background
The establishment of the starry darkroom test environment is the basis and precondition for the research of airspace anti-interference tests in the darkroom, and becomes a focus of attention in recent years. The testing environment of the starry darkroom outputs a plurality of paths of satellite simulation navigation signals through the navigation simulation equipment, and the signals are respectively transmitted through a plurality of different antennas. The number of satellites visible in the Beidou simultaneously can reach 18 at most, and deceptive signal simulation is added, so that the number of the Beidou visible satellites simulated simultaneously is generally required to be not less than 20, and therefore, the navigation signal simulation equipment is required to output not less than 20 signals simultaneously, each signal is independently controllable, and any frequency points of any system such as the Beidou, the GPS, the Galileo, the GLONASS, the SBAS and the like are supported and configured.
The current common method comprises the steps of adopting a plurality of single-system single-frequency-point multi-output navigation signal simulation devices to be cascaded or a plurality of multi-system full-frequency-point single-output navigation signal simulation devices to be cascaded and mapping the multi-system full-frequency-point single-output navigation signal simulation devices to a plurality of antennas through a switch matrix, and the method has the following problems that can not be solved:
1) the signal continuity of signals in the incoming direction switching process cannot be guaranteed only through a switch matrix, so that the requirement that the pseudo range and the carrier phase do not jump when an RTK starry anti-interference test scene is used cannot be met;
2) one navigation signal simulation device can only simulate one frequency point, and cannot simultaneously simulate full-system full-frequency point signals, the system integration level is not high, and for application occasions requiring full-system full-frequency point testing, a plurality of navigation signal simulation devices need to be configured, so that the cost is high;
3) the multiple navigation signal simulation devices also bring the problems of complex cascade integration between devices, reduced reliability and the like.
Disclosure of Invention
The method comprises the steps of receiving a signal from a satellite, and outputting the signal to a satellite through a satellite communication interface.
The technical scheme adopted by the application is as follows:
a starry sky-based real satellite signal simulation apparatus, comprising:
each satellite signal system equipment comprises a navigation signal generation channel capable of outputting twelve paths of simulation navigation signals, and is used for generating 12 x N paths of full-system full-frequency satellite navigation signals according to satellite signal simulation control parameters, switching and outputting the signals according to needs after simultaneously generating satellite navigation signals at the current moment and the next moment to realize continuous and non-hopping of the time phase when the signals are output, wherein 1PPS (pulse per second) and 10MHz (megahertz) signals output by any one satellite signal system equipment are adopted among the satellite signal system equipment to be synchronized, and the satellite signal simulation control parameters are provided by an upper computer or any one of the satellite signal system equipment; each satellite signal satellite type equipment of the starry sky specifically includes:
the twelve-block unified signal generation module is used for generating corresponding twelve navigation intermediate frequency signals according to the control parameters, wherein each navigation intermediate frequency signal comprises a navigation intermediate frequency signal at the current moment and a navigation intermediate frequency signal at the next moment;
twelve local oscillators can be provided with an up-conversion radio frequency module, are respectively connected with the output end signals of the twelve system type signal generation modules, and are used for up-converting the navigation intermediate frequency signals generated by the twelve system type signal generation modules and then outputting twelve paths of analog navigation signals.
Further, each babysbreath satellite signal system type device specifically further includes:
the industrial control module is used for receiving an external control instruction to generate satellite signal simulation control parameters, and the external control instruction comprises satellite navigation signal simulation parameters at the current moment and the next moment;
the system comprises a time-frequency reference module, a data processing module and a data processing module, wherein the time-frequency reference module is used for receiving a time-frequency signal required by external input or internal generation single-machine equipment and supporting time-frequency reference output;
the power supply module is used for providing working power supply for the equipment;
and the bottom plate is used for interconnection and installation of all the devices.
Further, the system type signal generating module specifically includes:
a local time module for local time keeping and time synchronization;
the M reconfigurable signal generation channels are used for generating corresponding M baseband signals according to external input dynamic interpolation, wherein the M baseband signals comprise a baseband signal at the current moment and a baseband signal at the next moment;
the data combination module is used for combining and outputting the M baseband signals to corresponding digital-analog fitting channels according to requirements;
and the four digital-analog fitting modules are used for carrying out up-conversion on the combined input baseband signals to obtain navigation intermediate-frequency signals, wherein the navigation intermediate-frequency signals comprise navigation intermediate-frequency signals at the current moment and navigation intermediate-frequency signals at the next moment.
Further, the reconfigurable signal generation channel specifically includes:
the starting control module is used for generating an enabling signal of the channel by the signal;
the pseudo code NCO generation module is used for generating a reference code clock with dynamic information and a reference code phase in a dynamic interpolation mode;
the carrier NCO generation module is used for generating a digital carrier with dynamic information in a dynamic interpolation mode;
the code clock generating module is used for generating data required by the code stream processing module and the text processing module;
the code stream processing module is used for finishing the processing and the generation of the code stream;
the message processing module is used for finishing caching and outflow processing of messages, secondary codes and secondary codes;
the baseband modulation module is used for completing the modulation of codes, secondary codes and text messages and the modulation of subcarriers;
and the carrier modulation module is used for modulating the signal output by the baseband modulation module in a complex modulation mode.
The application also provides a true satellite signal simulation method based on the babysbreath, and the method based on the device comprises the following steps:
s1, establishing a system unified coordinate system, and establishing and storing a mapping reference lookup table of the space area covered by the signal output of each satellite signal unified device and the channel according to the space area covered by the channel output generated by each navigation signal and the channel number;
s2, acquiring a corresponding ephemeris file according to the set simulation user position, the simulation starting time, the total simulation time and the satellite type, and calculating satellite navigation signal simulation parameters of the current time and the next time based on the coming direction of the real satellite signal;
s3, by matching the relative user position parameter of each visible satellite with a channel mapping reference lookup table, issuing the satellite navigation signal simulation parameters of the current time and the next time to a navigation signal generation channel corresponding to the satellite signal system type equipment of the babysbreath corresponding to each region, generating the satellite navigation simulation signal of the visible satellite at the current time and the satellite navigation simulation signal to be mapped at the next time, and selectively outputting the signals according to requirements to realize continuous and non-hopping of the phase when the signals are output;
s4, judging whether star entering and star exiting exist in a navigation signal generation channel corresponding to the starry satellite signal system type equipment;
s5, if there is no satellite in and out, keeping the original satellite navigation signal simulation parameters to generate satellite navigation simulation signals and selectively outputting the signals as required to realize continuous and non-hopping of phase when the signals are output, otherwise, recalculating and distributing the satellite navigation signal simulation parameters of corresponding channel numbers according to the mapping reference lookup table and selectively outputting the signals as required to realize continuous and non-hopping of phase when the signals are output;
and S6, repeating the steps S2-S5 until the generation and output of all satellite navigation simulation signals are completed.
Further, in step S1, the method for establishing a mapping reference lookup table of the spatial region and the channel covered by the signal output of each babysbreath satellite signal system-type device according to the spatial region and the channel number covered by the signal output of each signal generation channel specifically includes the steps of:
s11, establishing a two-dimensional table, wherein a longitudinal axis and a horizontal axis of the two-dimensional table respectively represent an azimuth angle and a pitch angle corresponding to the space area;
s12 traversing elevation angle theta and azimuth angle for space regionPhi area, uniformly distributing the whole space area by taking the beam width set by the user as an interval, dividing the two-dimensional table into N cells to represent N sub-areas of the space area, and each sub-area i corresponds to an elevation angle theta in a certain rangeiAnd azimuth angle phii；
S13, storing a channel number j which is less than or equal to N corresponding to each cell in the two-dimensional table, wherein each channel number corresponds to one path of signal output of the satellite signal unified device.
Further, the range of the elevation angle theta is 0-90 degrees, and the range of the azimuth angle phi is 0-360 degrees.
Further, in step S3, a satellite navigation simulation signal of the visible satellite at the current time and a satellite navigation simulation signal to be mapped at the next time are generated, and when the phases are continuously not hopped when the signals are output by selecting and outputting as needed, the corresponding satellite navigation simulation signal is selected by the program according to the generation time of the satellite navigation simulation signal and continuously output.
In another aspect, the present application further provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method for simulating a starry-based real satellite signal when executing the program.
In another aspect, the present application further provides a storage medium, where the storage medium includes a stored program, and the program, when executed, controls a device on which the storage medium is located to execute the steps of the method for simulating real satellite signals based on babysbreath.
Compared with the prior art, the method has the following beneficial effects:
the device comprises N satellite signal system devices of the babysbreath, each satellite signal system device comprises a navigation signal generation channel capable of outputting twelve paths of simulation navigation signals and is used for simulating control parameters according to satellite signals and simulating 12 + N paths of full-system full-frequency point satellite navigation signals simultaneously. In addition, the method and the device support that hardware can be flexibly configured according to the simulated visible star requirement, and equipment development cost is reduced. The application realizes that a single navigation signal simulator simulates twelve paths of full-system full-frequency-point satellite signals simultaneously, wherein each path of output comprises full-system full-frequency-point visible satellite signals such as Beidou, GPS, Galileo, GLONASS, SBAS and the like, N full-celestial satellite signal system type equipment simulates 12X N paths of satellite signals simultaneously, and can be connected to 12X N antennas in a full-celestial darkroom, so that a switch matrix is not needed, the problem of pseudo range and carrier phase jumping does not exist, and as one navigation signal simulator can simulate twelve paths of full-system full-frequency-point signals, the integration level is high, one full-celestial darkroom basically has dozens to hundreds of antennas to radiate satellite signals, and the requirement can be met only by a few navigation signal simulators.
In addition to the objects, features and advantages described above, other objects, features and advantages will be apparent from the present application. The present application will now be described in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
fig. 1 is a schematic diagram of a starry-based real satellite signal simulation device according to a preferred embodiment of the present application.
Fig. 2 is a block diagram of a babysbreath satellite signal system type device according to the preferred embodiment of the present application.
Fig. 3 is a schematic diagram of a system type signal generating module according to the preferred embodiment of the present application.
Fig. 4 is a schematic flowchart of a method for simulating a starry-based real satellite signal according to a preferred embodiment of the present application.
Fig. 5 is a flowchart illustrating the detailed sub-steps of step S1 according to the preferred embodiment of the present application.
Fig. 6 is a mapping reference lookup representation of the preferred embodiment of the present application.
Fig. 7 is a schematic diagram of the interaction between a real satellite signal simulation device and a starry darkroom signal in the preferred embodiment of the present application.
Fig. 8 is a schematic diagram illustrating the visible satellite navigation simulation signal corresponding to the current time and the satellite navigation simulation signal to be mapped at the next time and continuously outputting the signals according to the preferred embodiment of the present application.
Fig. 9 is a schematic block diagram of an electronic device entity of the preferred embodiment of the present application.
Fig. 10 is an internal structural view of a computer device of the preferred embodiment of the present application.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, a preferred embodiment of the present application provides a starry-based real satellite signal simulation apparatus, including:
the system comprises N satellite signal statistical devices, wherein each satellite signal statistical device comprises a navigation signal generation channel capable of outputting twelve paths of simulation navigation signals, and is used for generating 12 x N paths of full-system full-frequency satellite navigation signals according to satellite signal simulation control parameters, switching and outputting the signals according to needs after simultaneously generating satellite navigation signals at the current moment and the next moment to realize continuous and non-hopping of the time phase when the signals are output, wherein 1PPS (pulse per second) and 10MHz (megahertz) signals output by any one of the satellite signal statistical devices are adopted among the satellite signal statistical devices to be synchronized, and the satellite signal simulation control parameters are provided by an upper computer or any one of the satellite signal statistical devices.
The embodiment provides a true satellite signal simulation device based on the babysbreath, the device comprises N babysbreath satellite signal unified devices, each babysbreath satellite signal unified device comprises a navigation signal generation channel capable of outputting twelve paths of simulation navigation signals, and the navigation signal generation channel is used for simulating control parameters according to satellite signals and simultaneously simulating 12 paths of N paths of full-system full-frequency point satellite navigation signals. In addition, the embodiment supports flexible configuration of hardware according to the requirements of simulated visible satellites, and reduces the development cost of equipment. In the embodiment, a single navigation signal simulator simulates twelve paths of full-system full-frequency-point satellite signals simultaneously, wherein each path of output comprises full-system full-frequency-point visible satellite signals such as Beidou, GPS, Galileo, GLONASS and SBAS, and N full-celestial satellite signal system devices simulate 12 x N paths of satellite signals simultaneously and can be connected to 12N antennas in a full-celestial darkroom, so that a switch matrix is not needed, the problem of pseudo range and carrier phase jump does not exist, and as one navigation signal simulator can simulate twelve paths of full-system full-frequency-point signals, the integration level is high, one full-celestial darkroom basically radiates satellite signals from dozens to hundreds of antennas, and the requirement can be met by only a few navigation signal simulators.
Specifically, as shown in fig. 2, in a preferred embodiment of the present application, each babysbreath satellite signal system device specifically includes an industrial control module, twelve system signal generation modules, twelve local oscillator configurable up-conversion radio frequency modules, a time-frequency reference module, a power module, and a bottom plate, where:
the industrial control module is used for receiving an external control instruction to generate satellite signal simulation control parameters, and the external control instruction comprises satellite navigation signal simulation parameters at the current moment and the next moment; the twelve block unified signal generation modules are used for generating corresponding twelve navigation intermediate frequency signals according to the control parameters, wherein each navigation intermediate frequency signal comprises a navigation intermediate frequency signal at the current moment and a navigation intermediate frequency signal at the next moment; the twelve local oscillator configurable up-conversion radio frequency modules are respectively in signal connection with the output ends of the twelve system type signal generation modules and are used for up-converting the navigation intermediate-frequency signals generated by the twelve system type signal generation modules and outputting twelve paths of analog navigation signals; the time-frequency reference module is used for receiving time-frequency signals required by external input or internal generation single-machine equipment and supporting time-frequency reference output; the power supply module is used for providing a working power supply for the equipment; and the bottom plate is used for interconnection and installation of all the devices. In addition, the industrial control module, the power supply module, the time-frequency reference module and the system type signal generation module all adopt a module form of a system type interface, and support expansion, quick plugging and installation.
In this embodiment, each satellite signal unified device includes an industrial control module, twelve unified signal generation modules, twelve local oscillator configurable up-conversion radio frequency modules, a time-frequency reference module, a power module, and a bottom plate, and it is advantageous in that a single device can realize the satellite output of any combination of twelve channels of visible satellite signals at full frequency points of the whole system, such as the beidou, the GPS, the Galileo, the Glonass, and the SBAS, and it ensures that the carrier phase is not jumped continuously when each visible satellite signal is switched to (output port) differently, thereby satisfying the RTK satellite testing requirements. The device has high integration level, high reliability and low cost.
Specifically, as shown in fig. 3, in a preferred embodiment of the present application, the system type signal generating module specifically includes a local time module, M reconfigurable signal generating channels, a data combining module, and four digital-to-analog fitting modules, where:
the local time module is used for local timekeeping and time synchronization;
the M reconfigurable signal generation channels are used for generating corresponding M baseband signals according to external input dynamic interpolation, wherein the M baseband signals comprise a baseband signal at the current moment and a baseband signal at the next moment;
the data combination module is used for combining and outputting the M baseband signals to corresponding digital-analog fitting channels according to requirements;
the four digital-analog fitting modules are used for carrying out up-conversion on the combined input baseband signals to obtain navigation intermediate-frequency signals, wherein the navigation intermediate-frequency signals comprise navigation intermediate-frequency signals at the current moment and navigation intermediate-frequency signals at the next moment.
In this embodiment, the system type signal generating module specifically includes a local time module, M reconfigurable signal generating channels, a data combining module, and four digital-analog fitting modules. The system type signal generation module divides the whole system navigation frequency points such as the Beidou, the GPS, the Galileo, the GLONASS, the SBAS and the like into 4 blocks, baseband signals of the similar frequency points are combined and then are output through the same DAC module in a fitting mode, 4 DAC modules are configured in total, and the output signals support to simultaneously output a plurality of satellite signals of the systems such as the Beidou, the GPS, the Galileo, the GLONASS, the SBAS and the like through up-conversion. Specifically, the system comprises 1 local time module, M identical reconfigurable signal generation channels, 1 data combination module and 4 analog combination modules; the local time module comprises a local time keeping function and a time synchronization function; the reconstruction signal generation channel generates a corresponding baseband signal according to the dynamic interpolation of external input; the data combination module combines the baseband signal generation channels according to requirements and outputs the baseband signal generation channels to different digital-analog fitting channels, the digital-analog fitting channels up-convert the input baseband signals to obtain navigation intermediate-frequency signals, and the output intermediate-frequency signals can be combined randomly according to requirements.
Specifically, as shown in fig. 3, in a preferred embodiment of the present application, the reconfigurable signal generation channel specifically includes a start control module, a pseudo code NCO generation module, a carrier NCO generation module, a code clock generation module, a code stream processing module, a text processing module, a baseband modulation module, and a carrier modulation module, where:
the starting control module is used for generating an enabling signal of the channel by a signal;
the pseudo code NCO generation module is used for generating a reference code clock with dynamic information and a reference code phase in a dynamic interpolation mode;
the carrier NCO generation module is used for generating a digital carrier with dynamic information in a dynamic interpolation mode;
the code clock generating module is used for generating data required by the code stream processing module and the text message processing module;
the code stream processing module is used for finishing the processing and the generation of the code stream;
the message processing module is used for finishing caching and outflow processing of messages, secondary codes and secondary codes;
the baseband modulation module is used for completing the modulation of codes, secondary codes and text messages and the modulation of subcarriers;
and the carrier modulation module is used for modulating the signal output by the baseband modulation module in a duplex modulation mode.
The reconfigurable signal generation channel of the embodiment specifically comprises a starting control module, a pseudo code NCO generation module, a carrier NCO generation module, a code clock generation module, a code stream processing module, a text processing module, a baseband modulation module and a carrier modulation module.
As shown in fig. 4, another preferred embodiment of the present application further provides a method for simulating a real satellite signal based on babysbreath, which includes the following steps:
s1, establishing a system unified coordinate system, and establishing and storing a mapping reference lookup table of the space area covered by the signal output of each satellite signal unified device and the channel according to the space area covered by the channel output generated by each navigation signal and the channel number;
s2, acquiring a corresponding ephemeris file according to the set simulation user position, simulation starting time, total simulation time and satellite type, and calculating satellite navigation signal simulation parameters including the number of visible satellites, the relative user positions of the visible satellites, visible satellite navigation signal frequency points, visible satellite numbers and the like, wherein the satellite navigation signal simulation parameters are based on the incoming directions of real satellite signals at the current time and the next time;
s3, by matching the relative user position parameter of each visible satellite with a channel mapping reference lookup table, issuing the satellite navigation signal simulation parameters of the current time and the next time to a navigation signal generation channel corresponding to the satellite signal system type equipment of the babysbreath corresponding to each region, generating the satellite navigation simulation signal of the visible satellite at the current time and the satellite navigation simulation signal to be mapped at the next time, and selectively outputting the signals according to requirements to realize continuous and non-hopping of the phase when the signals are output;
s4, judging whether star entering and star exiting exist in a navigation signal generation channel corresponding to the starry satellite signal system type equipment;
s5, if there is no satellite in and out, keeping the original satellite navigation signal simulation parameters to generate satellite navigation simulation signals and selectively outputting the signals as required to realize continuous and non-hopping of phase when the signals are output, otherwise, recalculating and distributing the satellite navigation signal simulation parameters of corresponding channel numbers according to the mapping reference lookup table and selectively outputting the signals as required to realize continuous and non-hopping of phase when the signals are output;
and S6, repeating the steps S2-S5 until the generation and output of all satellite navigation simulation signals are completed.
The embodiment provides a starry satellite signal simulation method, which includes the steps of firstly establishing a mapping reference lookup table of a space area covered by signal output of each starry satellite signal system type device and a channel, storing the mapping reference lookup table, and calculating satellite navigation signal simulation parameters including the number of visible satellites, the relative user positions of the visible satellites, the frequency points of the visible satellite navigation signals, the numbers of the visible satellites and the like at a certain moment ti based on real satellite signals; intelligently matching the relative user position parameter of each visible satellite and a channel mapping reference lookup table, and issuing the satellite navigation signal simulation parameter corresponding to the ti moment to a corresponding navigation signal generation channel; in addition, in order to ensure the phase continuity of output signals of each channel, each channel runs on the orbit according to the satellite orbit of the simulated navigation system, the device inputs simulation parameters of satellite navigation signals mapped at the current moment and simulation parameters of satellite navigation signals to be mapped in a certain time period next to the corresponding navigation signal generation channel, therefore, each channel generates satellite simulation signals to be mapped in advance besides corresponding visible satellite signals, and each navigation signal generation channel selects corresponding signal output according to needs, so that the continuous and non-hopping of the signal phase is ensured.
Specifically, as shown in fig. 5, in the preferred embodiment of the present application, in step S1, a mapping reference lookup table of the spatial region covered by the signal output of each babysbreath satellite signal system-type device and the channel is established according to the spatial region covered by the signal output of each signal generation channel and the channel number, which specifically includes the steps of:
s11, establishing a two-dimensional table, wherein a longitudinal axis and a horizontal axis of the two-dimensional table respectively represent an azimuth angle and a pitch angle corresponding to the space area;
s12, traversing the regions of an elevation angle theta and an azimuth angle phi to the space region, wherein the range of the elevation angle theta is 0-90 degrees, the range of the azimuth angle phi is 0-360 degrees, the beam width set by a user is used as an interval to uniformly distribute the whole space region, the two-dimensional table is divided into N cells to represent N sub-regions of the space region, and each sub-region i corresponds to the elevation angle theta in a certain rangeiAnd azimuth angle phii；
S13, storing a channel number j which is less than or equal to N corresponding to each cell in the two-dimensional table, wherein each channel number corresponds to one path of signal output of the satellite signal unified device.
In this embodiment, as shown in fig. 6, each cell of the two-dimensional table includes a channel number of the kth antenna and a corresponding covered area (θ)k，φk) Under the condition that the user position parameters are known, satellite navigation signal simulation parameters of the current time and the next time can be issued to navigation signal generation channels corresponding to satellite navigation signal statistical equipment of the babysbreath corresponding to each region by matching the relative user position parameters of each visible satellite and a channel mapping reference lookup table, satellite navigation simulation signals of the visible satellites at the current time and satellite navigation simulation signals to be mapped at the next time are generated, and finally, the continuous and non-hopping phase is realized when the signals are output according to the selection and the output of the requirements.
Specifically, in the preferred embodiment of the present application, in step S3, when the satellite navigation simulation signal of the visible satellite at the current time and the satellite navigation simulation signal to be mapped at the next time are generated and output is selected as needed to realize continuous and non-jump phase when signal output is realized, the corresponding satellite navigation simulation signal is selected by the program according to the generation time of the satellite navigation simulation signal and continuously output.
As shown in fig. 7, the 12 × N transmitting antennas divide the darkroom environment into 12 × N areas, wherein the corresponding antennas are numbered Zone 1-Zone (12 × N); the N satellite signal system type devices all-sky satellite output 12 x N satellite signals, and the output signals are numbered as signals 1-12 x N; and the antenna is connected with 12 x N antennas in the starry darkroom one by one.
Assuming that the simulation time ti, the layout of the satellites visible to reality is that the Zone1 area BDS1# satellite, GPS3# satellite, GLO4# and GAL5 satellite are visible, and the Zone2 area BDS6#, GLO4# and GAL3# satellite are visible; zone3 area BDS7#, BDS11# satellite visible; zone (12 × N) area GPS32#, BDS5# satellites visible;
the babysbreath satellite signal system type devices 1-N generate visible satellite signals at the ti-1 moment in advance, except that all visible satellite signals at the ti-1 moment are generated and output channels are guaranteed to be opened, the visible satellite signals at the ti moment are also generated, the visible satellite signals comprise a BDS1# satellite generated by a signal 1, a GPS3# satellite and a GLO4# satellite, and BDS6#, GLO4# and GAL3 satellite signals generated by a signal 2; signal 3 generates the BDS7#, BDS11# satellite signals and signal (12 × N) generates the GPS32# and BDS5# satellite signals, keeping the output signal path at time ti-1 open and the output signal path at time ti closed.
As shown in FIG. 8, the navigation signal generation channel Si is assumed to cover an area
The initial simulation outputs analog signals of a satellite A, B, C and the like; suppose that satellite A is at time ti-1 relative to the user position
Although the channel navigation signal generation channel Si generates a satellite A simulation signal visible at the ti-1 moment in advance and also generates a satellite B simulation signal visible at the ti moment, the navigation signal generation channel Si can select to output the satellite A simulation signal; the satellite B at time ti is theta relative to the user position1Therefore, the time ti navigation signal generation channel Si will turn off the satelliteAs can be seen from fig. 8, the simulation signal a outputs the simulation signal B, and because the signal is generated in advance and the output mode is selected in this embodiment, it can be ensured that the phase of the output simulation signal B switched and output is continuous and does not jump.
As shown in fig. 9, the preferred embodiment of the present application further provides an electronic device, which includes a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor executes the computer program to implement the steps of the method for simulating a starry-based real satellite signal in the above embodiments.
As shown in fig. 10, the preferred embodiment of the present application also provides a computer device, which may be a terminal or a biopsy server, and the internal structure thereof may be as shown in fig. 10. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with other external computer devices through network connection. The computer program is executed by a processor to implement the steps of the method for simulation of true satellite signals based on babysbreath as described above.
Those skilled in the art will appreciate that the architecture shown in fig. 10 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
A preferred embodiment of the present application further provides a storage medium, where the storage medium includes a stored program, and when the program runs, the storage medium controls a device in which the storage medium is located to execute the steps of the method for simulating a starry-based real satellite signal in the foregoing embodiment.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
If the functions of the method of the present embodiment are implemented in the form of software functional units and sold or used as independent products, the functions may be stored in one or more storage media readable by a computing device. Based on such understanding, part of the contribution to the prior art of the embodiments of the present application or part of the technical solution may be embodied in the form of a software product stored in a storage medium and including several instructions for causing a computing device (which may be a personal computer, a server, a mobile computing device or a network device) to execute all or part of the steps of the method described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the purpose of illustrating the preferred embodiments of the present application and is not to be construed as limiting the present application, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present application should be included in the scope of the present application.
Claims (10)
1. A true satellite signal simulation apparatus based on the babysbreath, comprising:
each satellite signal system equipment comprises a navigation signal generation channel capable of outputting twelve paths of simulation navigation signals, and is used for generating 12 x N paths of full-system full-frequency satellite navigation signals according to satellite signal simulation control parameters, switching and outputting the signals according to needs after simultaneously generating satellite navigation signals at the current moment and the next moment to realize continuous and non-hopping of the time phase when the signals are output, wherein 1PPS (pulse per second) and 10MHz (megahertz) signals output by any one satellite signal system equipment are adopted among the satellite signal system equipment to be synchronized, and the satellite signal simulation control parameters are provided by an upper computer or any one of the satellite signal system equipment; each satellite signal satellite type equipment of the starry sky specifically includes:
the twelve-block unified signal generation module is used for generating corresponding twelve navigation intermediate frequency signals according to the control parameters, wherein each navigation intermediate frequency signal comprises a navigation intermediate frequency signal at the current moment and a navigation intermediate frequency signal at the next moment;
twelve local oscillators can be provided with an up-conversion radio frequency module, are respectively connected with the output end signals of the twelve system type signal generation modules, and are used for up-converting the navigation intermediate frequency signals generated by the twelve system type signal generation modules and then outputting twelve paths of analog navigation signals.
2. The babysbreath-based real satellite signal simulation device according to claim 1, wherein each babysbreath satellite signal statistical apparatus further comprises:
the industrial control module is used for receiving an external control instruction to generate satellite signal simulation control parameters, and the external control instruction comprises satellite navigation signal simulation parameters at the current moment and the next moment;
the system comprises a time-frequency reference module, a data processing module and a data processing module, wherein the time-frequency reference module is used for receiving a time-frequency signal required by external input or internal generation single-machine equipment and supporting time-frequency reference output;
the power supply module is used for providing working power supply for the equipment;
and the bottom plate is used for interconnection and installation of all the devices.
3. The device according to claim 1, wherein the statistical signal generating module specifically comprises:
a local time module for local time keeping and time synchronization;
the M reconfigurable signal generation channels are used for generating corresponding M baseband signals according to external input dynamic interpolation, wherein the M baseband signals comprise a baseband signal at the current moment and a baseband signal at the next moment;
the data combination module is used for combining and outputting the M baseband signals to corresponding digital-analog fitting channels according to requirements;
and the four digital-analog fitting modules are used for carrying out up-conversion on the combined input baseband signals to obtain navigation intermediate-frequency signals, wherein the navigation intermediate-frequency signals comprise navigation intermediate-frequency signals at the current moment and navigation intermediate-frequency signals at the next moment.
4. The babysbreath-based real satellite signal simulation apparatus of claim 3,
the reconfigurable signal generation channel is characterized by specifically comprising:
the starting control module is used for generating an enabling signal of the channel by the signal;
the pseudo code NCO generation module is used for generating a reference code clock with dynamic information and a reference code phase in a dynamic interpolation mode;
the carrier NCO generation module is used for generating a digital carrier with dynamic information in a dynamic interpolation mode;
the code clock generating module is used for generating data required by the code stream processing module and the text processing module;
the code stream processing module is used for finishing the processing and the generation of the code stream;
the message processing module is used for finishing caching and outflow processing of messages, secondary codes and secondary codes;
the baseband modulation module is used for completing the modulation of codes, secondary codes and text messages and the modulation of subcarriers;
and the carrier modulation module is used for modulating the signal output by the baseband modulation module in a complex modulation mode.
5. Method for simulation of true satellite signals based on the device according to any of claims 1 to 4, characterized in that it comprises the steps of:
s1, establishing a system unified coordinate system, and establishing and storing a mapping reference lookup table of the space area covered by the signal output of each satellite signal unified device and the channel according to the space area covered by the channel output generated by each navigation signal and the channel number;
s2, acquiring a corresponding ephemeris file according to the set simulation user position, the simulation starting time, the total simulation time and the satellite type, and calculating satellite navigation signal simulation parameters of the current time and the next time based on the coming direction of the real satellite signal;
s3, by matching the relative user position parameter of each visible satellite with a channel mapping reference lookup table, issuing the satellite navigation signal simulation parameters of the current time and the next time to a navigation signal generation channel corresponding to the satellite signal system type equipment of the babysbreath corresponding to each region, generating the satellite navigation simulation signal of the visible satellite at the current time and the satellite navigation simulation signal to be mapped at the next time, and selectively outputting the signals according to requirements to realize continuous and non-hopping of the phase when the signals are output;
s4, judging whether star entering and star exiting exist in a navigation signal generation channel corresponding to the starry satellite signal system type equipment;
s5, if no satellite enters or exits, keeping the original satellite navigation signal simulation parameters to generate satellite navigation simulation signals and continuously output the satellite navigation simulation signals, otherwise, recalculating and distributing the satellite navigation signal simulation parameters of the corresponding channel numbers according to the mapping reference lookup table to generate and continuously output the satellite navigation simulation signals;
and S6, repeating the steps S2-S5 until the generation and output of all satellite navigation simulation signals are completed.
6. The method for simulating a satellite signal based on the babysbreath as claimed in claim 5, wherein in step S1, a mapping reference lookup table of the spatial region and the channel covered by the signal output of the babysbreath satellite signal statistical type device is established according to the spatial region and the channel number covered by the output channel of each signal generation channel, which specifically comprises the steps of:
s11, establishing a two-dimensional table, wherein a longitudinal axis and a horizontal axis of the two-dimensional table respectively represent an azimuth angle and a pitch angle corresponding to the space area;
s12, traversing the regions of elevation angle theta and azimuth angle phi for the space region, uniformly distributing the whole space region by taking the beam width set by a user as an interval, dividing the two-dimensional table into N cells to represent N sub-regions of the space region, wherein each sub-region i corresponds to the elevation angle theta in a certain rangeiAnd azimuth angle phii；
S13, storing a channel number j which is less than or equal to N corresponding to each cell in the two-dimensional table, wherein each channel number corresponds to one path of signal output of the satellite signal unified device.
7. The method of claim 6, wherein the satellite signal simulation system comprises a satellite simulation system,
the range of the elevation angle theta is 0-90 degrees, and the range of the azimuth angle phi is 0-360 degrees.
8. The method for simulating true satellite signals according to claim 5, wherein in step S3, the satellite navigation simulation signals of the visible satellites at the current time and the satellite navigation simulation signals to be mapped at the next time are generated, and when the phases are continuously not jumped when the signals are output by selecting and outputting according to the requirement, the corresponding satellite navigation simulation signals are selected by the program according to the generation time of the satellite navigation simulation signals and continuously output.
9. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor,
the processor, when executing the program, performs the steps of the method for simulation of a starry-based real satellite signal according to any one of claims 5 to 8.
10. A storage medium including a stored program, characterized in that,
controlling a device on which the storage medium is located to perform the steps of the method of one of claims 5 to 8 when the program is run.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111365538.9A CN113805205B (en) | 2021-11-18 | 2021-11-18 | True satellite signal simulation device, method, equipment and medium based on starry sky |
| PCT/CN2022/123957 WO2023087967A1 (en) | 2021-11-18 | 2022-10-09 | Anechoic chamber-based real satellite signal simulation apparatus and method, device, and medium |
| BE20225878A BE1030101A1 (en) | 2021-11-18 | 2022-10-27 | A real satellite signal simulation apparatus, method, apparatus and medium based on a full celestial star |
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| CN202111365538.9A CN113805205B (en) | 2021-11-18 | 2021-11-18 | True satellite signal simulation device, method, equipment and medium based on starry sky |
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| CN113805205A true CN113805205A (en) | 2021-12-17 |
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| BE (1) | BE1030101A1 (en) |
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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 |
| WO2023087967A1 (en) * | 2021-11-18 | 2023-05-25 | 湖南卫导信息科技有限公司 | Anechoic chamber-based real satellite signal simulation apparatus and method, device, and medium |
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| BE1030101A1 (en) | 2023-07-19 |
| WO2023087967A1 (en) | 2023-05-25 |
| CN113805205B (en) | 2022-02-18 |
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