CN108873021B - Simulation method/system, simulation equipment and simulation device for navigation satellite ephemeris - Google Patents
Simulation method/system, simulation equipment and simulation device for navigation satellite ephemeris Download PDFInfo
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- CN108873021B CN108873021B CN201710317057.8A CN201710317057A CN108873021B CN 108873021 B CN108873021 B CN 108873021B CN 201710317057 A CN201710317057 A CN 201710317057A CN 108873021 B CN108873021 B CN 108873021B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/23—Testing, monitoring, correcting or calibrating of receiver elements
Abstract
The invention provides a simulation method, a system, a simulation device and a device of a navigation satellite ephemeris, wherein the simulation method comprises the following steps: dividing a microwave anechoic chamber applying a satellite ephemeris simulation method into a plurality of test areas according to a pre-stored partition rule; controlling the output of a simulated navigation satellite signal according to a navigation satellite ephemeris to be simulated so as to simulate the navigation satellite ephemeris in a microwave darkroom; the navigation satellite signal is generated by a navigation satellite signal simulator, and each test area corresponds to one navigation satellite signal simulator; the simulated navigation satellite signals are transmitted through a test antenna arranged in the test area. The invention effectively solves the problems caused by the need of using a special shunt output navigation satellite signal simulator and arranging a large number of test antennas in advance or installing mechanical motion devices in the traditional method, uses the combined output satellite navigation signal simulator and reduces the number of the preset test antennas, and simulates the ephemeris of the navigation satellite for a long time on the premise of not changing the geometric precision factor.
Description
Technical Field
The invention belongs to the technical field of satellite communication, relates to a simulation method and a simulation system, and particularly relates to a simulation method/system, simulation equipment and a simulation device for a navigation satellite ephemeris.
Background
The satellite navigation simulator and the microwave darkroom are main experimental equipment for testing the air interface performance of the satellite navigation receiver, and two conditions are required for simulating ephemeris of a real satellite navigation signal on the premise of not changing a geometric precision factor value. Firstly, the layout of the antenna in the darkroom is consistent with the simulated satellite ephemeris, so that the coming direction of a real satellite signal can be simulated, and secondly, the satellite navigation signal simulator needs to have the function of independently outputting a single satellite signal by each port.
Please refer to fig. 1, which is a schematic structural diagram of a satellite navigation signal simulator in the prior art. As shown in fig. 1, the satellite navigation signal simulator 1 has a plurality of boards 11, and each board 11 is an independent baseband signal processing and up-conversion module, and can simulate an output signal of one navigation satellite. Through the internal radio frequency combiner 12, a combined (composite) signal can be output for a wired connection test satellite navigation receiver, through the internal multi-path radio frequency shunt 13, an independent (Individual) signal can be output, and the signal is connected with a plurality of antennas in a matched darkroom in a one-to-one correspondence manner, so that a real satellite ephemeris can be simulated.
However, since the satellite ephemeris is changed at any time, the following disadvantages are present for the conventional scheme:
firstly, when the satellite ephemeris is changed obviously, the antenna fixed in the darkroom cannot correspond to the corresponding ephemeris, and the geometric precision factor value is changed obviously, so that the problem that the long-time ephemeris simulation cannot be solved effectively for the client needing the long-time ephemeris simulation
Secondly, a large number of test antennas need to be arranged in advance or mechanical motion devices need to be installed;
and thirdly, the satellite navigation simulator with multi-path radio frequency shunt control has high manufacturing cost and single purpose, and can not be used for other purposes except for the air interface performance test of a satellite navigation receiver.
Therefore, how to provide a simulation method/system, simulation equipment and simulation device for a navigation satellite ephemeris is to solve the problem that the prior art cannot effectively solve the problems of long-time ephemeris simulation, the need to adopt a huge number of test antennas and mechanical motion devices, single use of a satellite navigation simulator and the like in response to a satellite ephemeris varying at any time, and thus becomes an urgent solution for technical experts in the field.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a simulation method/system, a simulation device and a simulation apparatus for a navigation satellite ephemeris, which are used to solve the problem that the prior art cannot effectively solve the problems of long-time ephemeris simulation, the need of using a huge number of test antennas and mechanical motion devices, and single usage of a satellite navigation simulator in response to a satellite duration changing at any moment.
To achieve the above and other related objects, an aspect of the present invention provides a method for simulating a navigation satellite ephemeris, including: dividing a microwave anechoic chamber applying the satellite ephemeris simulation method into a plurality of test areas according to a pre-stored partition rule; controlling the output of a simulated navigation satellite signal according to a navigation satellite ephemeris to be simulated so as to simulate the navigation satellite ephemeris in a microwave darkroom; the navigation satellite signal is generated by a navigation satellite signal simulator, and each test area corresponds to one navigation satellite signal simulator; the simulated navigation satellite signals are transmitted through a test antenna arranged in the test area.
In an embodiment of the present invention, the test area is divided into a main test area and a sub test area; the pre-storage partition rule is as follows: virtualizing a satellite navigation receiver visual angle in the microwave anechoic chamber, and dividing the virtual satellite navigation receiver visual angle into N main test areas by a preset spherical center angle; and dividing each main test area into a plurality of sub-test areas according to a preset central angle.
In an embodiment of the present invention, when dividing the sub-test area, it needs to satisfy: a first distance from any point on each sub-test area to the geometric center position of the sub-test area needs to be smaller than a second distance from the point to the geometric center positions of the sub-test areas except the point.
In an embodiment of the present invention, a test antenna is disposed at a geometric center of each of the sub-test areas, and each of the test antennas is connected to a navigation satellite signal simulator associated therewith; the navigation satellite signal simulator is used for generating the navigation satellite signal when receiving an output instruction for outputting the navigation satellite signal simulated by the navigation satellite signal simulator.
In an embodiment of the present invention, the step of controlling the output of the simulated navigation satellite signal according to the navigation satellite ephemeris to be simulated, and the step of simulating the navigation satellite ephemeris includes: according to the ephemeris of the navigation satellite to be simulated, when the simulation satellite moves from one sub-test area to another sub-test area, outputting a closing instruction to control a navigation satellite signal simulator corresponding to one sub-test area to stop outputting navigation satellite signals; and meanwhile, outputting an opening instruction to control a navigation satellite signal simulator corresponding to the other sub-test area to start outputting navigation satellite signals.
In another aspect, the present invention provides a simulation system for a navigation satellite ephemeris, the simulation system for a satellite ephemeris comprising: the partitioning module is used for partitioning the microwave anechoic chamber applying the satellite ephemeris simulation method into a plurality of test areas according to a pre-stored partition rule; the control module is used for controlling the output of a simulated navigation satellite signal according to a navigation satellite ephemeris to be simulated so as to simulate the navigation satellite ephemeris in a microwave darkroom; the navigation satellite signal is generated by a navigation satellite signal simulator, and each test area corresponds to one navigation satellite signal simulator; the simulated navigation satellite signals are transmitted through a test antenna arranged in the test area.
In an embodiment of the present invention, the pre-storage partition rule in the partition module is to virtualize a satellite navigation receiver view angle in the microwave anechoic chamber, and partition the virtual satellite navigation receiver view angle into N main test areas by a predetermined spherical center angle; and dividing each main test area into a plurality of sub-test areas according to a preset central angle.
In an embodiment of the present invention, when dividing the sub-test regions, the dividing module needs to satisfy that a first distance from any point on each sub-test region to a geometric center of the sub-test region is smaller than a second distance from the point to a geometric center of the sub-test region other than the point itself.
The invention also provides simulation equipment comprising the simulation system of the navigation satellite ephemeris.
A final aspect of the present invention provides a simulation apparatus, including: simulating equipment; the navigation satellite signal simulator is connected with the simulation equipment and is controlled by the simulation equipment; and a test antenna; and the navigation satellite signal simulator is connected with the test antenna.
In an embodiment of the invention, the navigation satellite signal simulator is configured to generate a simulated navigation satellite signal; the test antenna is arranged at the geometric center position of the sub-test area and used for transmitting the navigation satellite signals generated by the navigation satellite signal simulator corresponding to the sub-test area.
As described above, the satellite ephemeris simulation method, simulation system, simulation device and simulation apparatus of the present invention have the following advantages:
the simulation method/system, the simulation equipment and the simulation device of the navigation satellite ephemeris perform physical mapping on the actual distribution situation of the satellite space position in the microwave darkroom to form a semi-physical simulation environment, so that the receiving performance of a satellite navigation machine is truly reflected, the problems caused by the fact that a special shunt output navigation satellite signal simulator and a large number of pre-arranged test antennas or mechanical motion devices are needed in long-time ephemeris simulation in the traditional method are effectively solved, and the navigation satellite ephemeris is simulated for a long time on the premise of not changing geometric precision factors by using the low-cost and wide-use combined output satellite navigation signal simulator and reducing the number of the preset test antennas and using the combined output satellite navigation signal simulator and reducing the number of the preset test antennas.
Drawings
Fig. 1 is a schematic structural diagram of a navigation satellite navigation signal simulator in the prior art.
FIG. 2 is a schematic diagram illustrating a schematic structure of a method for ephemeris simulation of navigation satellites according to an embodiment of the invention.
FIG. 3 is a schematic perspective view of a main testing area in a micro-chamber according to an embodiment of the present invention.
FIG. 4 is a schematic top plan view of a neutron measurement area in a microwave chamber according to an embodiment of the present invention.
Fig. 5 is a schematic block diagram of a navigation satellite signal simulator applied in an embodiment of the invention.
FIG. 6 is a schematic diagram illustrating a schematic structure of a simulation system of ephemeris of navigation satellites according to an embodiment of the invention.
FIG. 7 is a schematic diagram illustrating a schematic structure of an exemplary embodiment of an emulation apparatus according to the present invention.
Fig. 8 is a schematic structural diagram of an exemplary embodiment of a simulation apparatus according to the present invention.
Description of the element reference numerals
1, navigation satellite signal simulator
5
11 board card
12 radio frequency combiner
13 radio frequency shunt
51 processor Board card
52，
53
54 output port
6 simulation system of navigation satellite ephemeris
61 division module
62 control module
7 simulation device
8 simulation device
81 test antenna
82 navigation satellite signal simulator
S21-S22
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
Example one
The embodiment provides a simulation method of a navigation satellite ephemeris, which includes the following steps:
dividing a microwave darkroom applying the satellite ephemeris simulation method into a plurality of test areas according to a pre-stored partition rule;
controlling the output of a simulated navigation satellite signal according to a navigation satellite ephemeris to be simulated so as to simulate the navigation satellite ephemeris; the navigation satellite signal is generated by a navigation satellite signal simulator, and each test area corresponds to one navigation satellite signal simulator; the simulated navigation satellite signals are transmitted through a test antenna arranged in the test area.
The method for simulating the ephemeris of the navigation satellite provided by the embodiment will be described in detail with reference to the drawings. The simulation environment for executing the simulation method of the navigation satellite ephemeris in this embodiment is a microwave darkroom. Please refer to fig. 2, which is a schematic structural diagram illustrating a simulation method of ephemeris for navigation satellites according to an embodiment. As shown in fig. 2, the simulation method of the ephemeris of the navigation satellite has the following steps: the navigation satellite signal simulator is a combiner output navigation satellite signal simulator.
And S21, dividing the microwave anechoic chamber to which the simulation method of the navigation satellite ephemeris is applied into a plurality of test areas according to a pre-storage partition rule. The test area includes a main test area and a sub test area. In this embodiment, the pre-partition rule is: simulating a satellite navigation receiver visual angle in the microwave anechoic chamber, and dividing the virtual satellite navigation receiver visual angle into N main test areas according to a preset spherical center angle; and dividing each main test area into a plurality of sub-test areas according to a preset central angle. In this embodiment, since the virtual satellite navigation receiver view is in a segment shape, and the spherical cap view is a first angle, the predetermined spherical center angle needs to satisfy the first angle/the predetermined spherical center angle as a positive integer; the predetermined central angle should satisfy 360 degrees/the predetermined central angle as a positive integer.
Please refer to fig. 3, which is a schematic perspective view of a main test area in a microwave dark room according to an embodiment. As shown in fig. 3, if the arc angle of the virtual satellite navigation receiver view angle is 180 degrees and the predetermined central angle is 30 degrees, the virtual satellite navigation receiver view angle 3 is divided into 3 main test areas, i.e., a first main test area 31, a second main test area 32, and a third main test area 33.
Fig. 4 is a schematic top plan view of a neutron test area in a microwave chamber according to an embodiment. As shown in fig. 4, the predetermined central angle of the first main test area is 360 degrees, i.e., the sub-test area a1 for which the first main test area is also; the predetermined central angle of the second main test area is 90 degrees, namely the second main test area is divided into 4 sub-test areas A2, B2, C2 and D2; the predetermined central angle of the third main test area is 45 degrees, i.e., the third main test area is divided into 8 sub-test areas a3, B3, C3, D3, E3, F3, G3, H3. In this embodiment, when dividing the sub-test area, it is necessary to satisfy: a first distance from any point on each sub-test area to the geometric center position of the sub-test area needs to be smaller than a second distance from the point to the geometric center positions of the sub-test areas except the point.
And S22, controlling the output of the simulated navigation satellite signals according to the navigation satellite ephemeris to be simulated so as to simulate the navigation satellite ephemeris in a microwave dark room. In this embodiment, the navigation satellite signal is generated by a navigation satellite signal simulator, and each of the test areas corresponds to one of the navigation satellite signal simulators; and the simulated navigation satellite signals are transmitted through a test antenna arranged in the test area. Each of the test antennas is connected with the navigation satellite signal simulator associated with the test antenna; the navigation satellite signal simulator is used for generating the simulated navigation satellite signal when receiving an output instruction of outputting the simulated navigation satellite signal.
Specifically, according to a navigation satellite ephemeris to be simulated, when a simulation satellite moves from one sub-test area to another sub-test area, a closing instruction is output to control a navigation satellite signal simulator corresponding to one sub-test area to stop outputting a navigation satellite signal; and meanwhile, outputting an opening instruction to control a navigation satellite signal simulator corresponding to the other sub-test area to start outputting navigation satellite signals.
For example, 13 test antennas are disposed at the geometric center of the sub-test regions, i.e., at sub-test regions a1, a2, B2, C2, D2, A3, B3, C3, D3, E3, F3, G3, and H3, and the navigation satellite signals generated by the navigation satellite signal simulator are transmitted through the test antennas.
For example, a satellite is located in the sub-test area a1 at the first time, and the output command for controlling the navigation satellite signal simulator corresponding to the sub-test area a1 to output the simulated navigation satellite signal is generated; when the satellite moves from the sub-test area A1 to the sub-test area B2 at the second moment, a turn-off command is output to control the navigation satellite signal simulator corresponding to the sub-test area A1 to stop outputting the navigation satellite signals, and a turn-on command is output to control the navigation satellite signal simulator corresponding to the sub-test area B2 to start outputting the simulated navigation satellite signals. When the satellite moves from the sub-test area B2 to the sub-test area A3 at the third time, a turn-off command is output to control the navigation satellite signal simulator corresponding to the sub-test area B2 to stop outputting the navigation satellite signals, and a turn-on command is output to control the navigation satellite signal simulator corresponding to the sub-test area A3 to start outputting the simulated navigation satellite signals. And completing the navigation satellite ephemeris to be simulated.
In this embodiment, the navigation satellite signal simulator adopts a combiner to output a navigation satellite signal simulator, and the navigation satellite signal simulator is provided with N processor board cards and 1 output port. Each processor card and the output port form an output channel. Each processor board card processes satellite test signals of different satellites to be tested, baseband processing is carried out on the satellite test signals, transmission delay and noise are simulated, frequency conversion and amplification are carried out on the processed baseband signals, and satellite navigation signals are simulated. Referring to fig. 5, a schematic diagram of a signal simulator applied in an embodiment is shown. For example, in the present embodiment, there are 3 satellites to be tested, and the processor board card 51, the processor board card 52, and the processor board card 53 in the signal simulator 5 correspond to the 3 satellites to be tested, respectively. In this embodiment, when a navigation satellite to be simulated needs to be simulated for a long time, the navigation satellite signal simulator outputs navigation satellite signals of different satellites at the same time to test antennas arranged in different sub-test areas together by combining, so as to facilitate the transmission of the navigation satellite signals.
The simulation method of the navigation satellite ephemeris in this embodiment forms a semi-physical simulation environment by physically mapping the actual distribution of the satellite spatial position in a microwave anechoic chamber, so as to truly reflect the receiving performance of the satellite navigation machine, effectively solves the problems that the conventional method needs to use a special branch output navigation satellite signal simulator and a huge number of test antennas which are arranged in advance or mechanical motion devices for long-time ephemeris simulation, and simulates the navigation satellite ephemeris for a long time by using a low-cost and wide-use combined output satellite navigation signal simulator and reducing the number of preset test antennas and using a combined output satellite navigation signal simulator and reducing the number of preset test antennas without changing the geometric precision factor.
Example two
The present embodiment provides a simulation system of a navigation satellite ephemeris, where the simulation system of the satellite ephemeris includes:
the partitioning module is used for partitioning the microwave anechoic chamber applying the satellite ephemeris simulation method into a plurality of test areas according to a pre-stored partition rule;
the control module is used for controlling the output of a simulated navigation satellite signal according to a navigation satellite ephemeris to be simulated so as to simulate the navigation satellite ephemeris in a microwave darkroom; the navigation satellite signal is generated by a navigation satellite signal simulator, and each test area corresponds to one navigation satellite signal simulator; the simulated navigation satellite signals are transmitted through a test antenna arranged in the test area.
The simulation system of the navigation satellite ephemeris provided by the embodiment will be described in detail with reference to the drawings. Please refer to fig. 6, which is a schematic structural diagram of a simulation system for ephemeris of navigation satellites in an embodiment. As shown in fig. 6, the simulation system 6 for the ephemeris of the navigation satellite includes: a dividing module 61 and a control module 62.
The dividing module 61 is configured to divide the microwave anechoic chamber to which the simulation method of the navigation satellite ephemeris is applied into a plurality of test areas according to a pre-stored partition rule. The test area includes a main test area and a sub test area. In this embodiment, the partitioning rule pre-stored in the partitioning module is: the dividing module is used for simulating a satellite navigation receiver visual angle in the microwave darkroom and dividing the virtual satellite navigation receiver visual angle into N main test areas according to a preset spherical center angle; and dividing each main test area into a plurality of sub-test areas according to a preset central angle. In this embodiment, since the virtual satellite navigation receiver view is in a segment shape, and the spherical cap view is a first angle, the predetermined spherical center angle needs to satisfy the first angle/the predetermined spherical center angle as a positive integer; the predetermined central angle should satisfy 360 degrees/the predetermined central angle as a positive integer. In this embodiment, when dividing the sub-test area, it is necessary to satisfy: a first distance from any point on each sub-test area to the geometric center position of the sub-test area needs to be smaller than a second distance from the point to the geometric center positions of the sub-test areas except the point.
The control module 62 connected to the dividing module 61 is configured to control output of a simulated navigation satellite signal according to a navigation satellite ephemeris to be simulated, so as to simulate the navigation satellite ephemeris in a microwave darkroom; the navigation satellite signal is generated by a navigation satellite signal simulator, and each test area corresponds to one navigation satellite signal simulator; and the simulated navigation satellite signals are transmitted through a test antenna arranged in the test area.
Specifically, the control module 62 outputs a closing instruction when the simulation satellite moves from one sub-test area to another sub-test area according to the ephemeris of the navigation satellite to be simulated, so as to control the navigation satellite signal simulator corresponding to one sub-test area to stop outputting the navigation satellite signal; and meanwhile, outputting an opening instruction to control a navigation satellite signal simulator corresponding to the other sub-test area to start outputting navigation satellite signals.
For example, a satellite is located in sub-test area a1 at a first time, and the control module 62 controls the navigation satellite signal simulator corresponding to sub-test area a1 to output an output command of a simulated navigation satellite signal, so as to generate the simulated navigation satellite signal; when the satellite moves from the sub-test area A1 to the sub-test area B2 at the second moment, a turn-off command is output to control the navigation satellite signal simulator corresponding to the sub-test area A1 to stop outputting the navigation satellite signals, and a turn-on command is output to control the navigation satellite signal simulator corresponding to the sub-test area B2 to start outputting the simulated navigation satellite signals. When the satellite moves from the sub-test area B2 to the sub-test area A3 at the third time, a turn-off command is output to control the navigation satellite signal simulator corresponding to the sub-test area B2 to stop outputting the navigation satellite signals, and a turn-on command is output to control the navigation satellite signal simulator corresponding to the sub-test area A3 to start outputting the simulated navigation satellite signals. And completing the navigation satellite ephemeris to be simulated.
Fig. 7 shows a schematic structural diagram of the simulation device in an embodiment. As shown in fig. 7, the simulation apparatus 7 includes the simulation system 6 of the navigation satellite ephemeris described above. The emulation device 7 is composed of a processor and a memory. The memory is used for storing the partition rule, the preset spherical center angle, the preset circular center angle and the navigation satellite ephemeris to be simulated. The memory may include read-only memory and random access memory, and provides data to the processor. The portion of memory may also include non-volatile random access memory. The processor connected with the memory is used for dividing the microwave anechoic chamber applying the satellite ephemeris simulation method into a plurality of test areas according to a pre-stored partition rule; controlling the output of a simulated navigation satellite signal according to a navigation satellite ephemeris to be simulated so as to simulate the navigation satellite ephemeris in a microwave darkroom; the navigation satellite signal is generated by a navigation satellite signal simulator, and each test area corresponds to one navigation satellite signal simulator; and the simulated navigation satellite signals are transmitted through a test antenna arranged in the test area.
Fig. 8 shows a schematic structural diagram of a simulation apparatus in an embodiment. As shown in fig. 8, the simulation apparatus 8 includes a test antenna 81; a navigation satellite signal simulator 82 connected to the test antenna; and the simulation device 7 connected to the navigation satellite signal simulator 82. In the present embodiment, the test antenna 81 is disposed at the geometric center of the sub-test area and is used for transmitting the navigation satellite signal generated by the navigation satellite signal simulator 82 corresponding to the sub-test area.
In summary, the simulation method, the simulation system, the simulation device and the simulation apparatus for the ephemeris of the navigation satellite according to the present invention form a semi-physical simulation environment by physically mapping the actual distribution of the spatial position of the satellite in the microwave darkroom, so as to truly reflect the receiving performance of the satellite navigation machine, effectively solve the problems of the conventional method that the simulation of the ephemeris for a long time requires the use of a dedicated branch output satellite navigation signal simulator and the pre-arrangement of a huge number of test antennas or the installation of mechanical motion devices, and use the combiner output satellite navigation signal simulator and reduce the number of the pre-arrangement test antennas, so as to simulate the ephemeris of the navigation satellite for a long time without changing the geometric accuracy factor. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. A simulation method of a navigation satellite ephemeris is characterized by comprising the following steps:
dividing a microwave anechoic chamber applying the satellite ephemeris simulation method into a plurality of test areas according to a pre-stored partition rule; therefore, the test area is divided into a main test area and a sub-test area; the pre-storage partition rule is as follows: virtualizing a satellite navigation receiver visual angle in the microwave anechoic chamber, and dividing the virtual satellite navigation receiver visual angle into N main test areas by a preset spherical center angle; dividing each main test area into a plurality of sub-test areas according to a preset central angle; the field angle formed by the test area meets the requirement of ephemeris simulation of the navigation satellite;
controlling the output of a simulated navigation satellite signal according to a navigation satellite ephemeris to be simulated so as to simulate the navigation satellite ephemeris in a microwave darkroom; the method comprises the following steps: according to the ephemeris of the navigation satellite to be simulated, when the simulation satellite moves from one sub-test area to another sub-test area, outputting a closing instruction to control a navigation satellite signal simulator corresponding to one sub-test area to stop outputting navigation satellite signals; meanwhile, outputting an opening instruction to control a navigation satellite signal simulator corresponding to the other sub-test area to start outputting a navigation satellite signal;
the navigation satellite signal is generated by a navigation satellite signal simulator, and each test area corresponds to one navigation satellite signal simulator; the simulated navigation satellite signals are transmitted through a test antenna arranged in the test area.
2. The method of navigation satellite ephemeris simulation of claim 1 wherein: when the sub-test area is divided, the following requirements are met: a first distance from any point on each sub-test area to the geometric center position of the sub-test area needs to be smaller than a second distance from the point to the geometric center positions of the sub-test areas except the point.
3. The method for simulating the ephemeris of navigation satellites of claim 1, wherein:
arranging a test antenna at the geometric center of each sub-test area, wherein each test antenna is connected with a navigation satellite signal simulator associated with the test antenna; the navigation satellite signal simulator is used for generating the navigation satellite signal when receiving an output instruction for outputting the navigation satellite signal simulated by the navigation satellite signal simulator.
4. A system for simulation of navigation satellite almanac, the system comprising:
the partitioning module is used for partitioning the microwave anechoic chamber applying the satellite ephemeris simulation method into a plurality of test areas according to a pre-stored partition rule; therefore, the test area is divided into a main test area and a sub-test area; the pre-storage partition rule is as follows: virtualizing a satellite navigation receiver visual angle in the microwave anechoic chamber, and dividing the virtual satellite navigation receiver visual angle into N main test areas by a preset spherical center angle; dividing each main test area into a plurality of sub-test areas according to a preset central angle; the field angle formed by the test area meets the requirement of ephemeris simulation of the navigation satellite;
the control module is used for controlling the output of a simulated navigation satellite signal according to a navigation satellite ephemeris to be simulated so as to simulate the navigation satellite ephemeris in a microwave darkroom; the control module outputs a closing instruction when the simulation satellite moves from one sub-test area to another sub-test area according to the ephemeris of the navigation satellite to be simulated so as to control the simulator of the navigation satellite signal corresponding to one sub-test area to stop outputting the signal of the navigation satellite; meanwhile, outputting an opening instruction to control a navigation satellite signal simulator corresponding to the other sub-test area to start outputting a navigation satellite signal;
the navigation satellite signal is generated by a navigation satellite signal simulator, and each test area corresponds to one navigation satellite signal simulator; the simulated navigation satellite signals are transmitted through a test antenna arranged in the test area.
5. The system for simulating the ephemeris for navigation satellites of claim 4 wherein: the pre-storage partition rule in the partition module is to virtualize a satellite navigation receiver visual angle in the microwave anechoic chamber and divide the virtual satellite navigation receiver visual angle into N main test areas according to a preset spherical center angle; and dividing each main test area into a plurality of sub-test areas according to a preset central angle.
6. The system for simulating the ephemeris for navigation satellites of claim 4 wherein: when the dividing module divides the sub-test regions, the first distance from any point on each sub-test region to the geometric center position of the sub-test region needs to be smaller than the second distance from the point to the geometric center positions of the sub-test regions except the point.
7. Simulation device, characterized in that it comprises a simulation system of a navigation satellite ephemeris according to any of claims 4-6.
8. An emulation apparatus characterized in that the emulation apparatus comprises an emulation device according to claim 7;
the navigation satellite signal simulator is connected with the simulation equipment and is controlled by the simulation equipment; and
testing the antenna; and the navigation satellite signal simulator is connected with the test antenna.
9. The emulation apparatus according to claim 8, wherein:
the navigation satellite signal simulator is used for generating simulated navigation satellite signals;
the test antenna is arranged at the geometric center position of the sub-test area and used for transmitting the navigation satellite signals generated by the navigation satellite signal simulator corresponding to the sub-test area.
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| CN111123305B (en) * | 2019-12-12 | 2023-08-22 | 秦然 | Graphical noise coefficient optimization method for GNSS recording playback tester |
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