A method, device and medium for determining interference of low-orbit satellite

Abstract

The present application discloses a method, device and medium for determining interference of low-orbit satellites, relates to the field of satellites, analyzes the aggregate interference of ground communication systems to low-orbit satellites, first determines the antenna gain and radiation pattern of the satellite antenna, determines the ground area covered by the beam participating in the interference calculation, determines the position of the central station of the ground area covered by the beam, and determines the type and number of base stations and the propagation model according to the central station, assumes that each base station has the same interference to the satellite, and the base stations in an area are equivalent to the central station at a position, the aggregate interference value of the central station is the superposition of the interference values ​​of a single base station, the interference value of each base station is obtained according to the type and number of base stations, the propagation model, the antenna gain and radiation pattern, and then the aggregate interference value is determined according to the interference value of each base station, that is, the low-orbit satellite may be subject to the aggregate interference of the ground communication system, which provides a more reliable basis for the feasibility of spectrum sharing between systems and subsequent interference avoidance methods.

Description

Technical Field

[0001] The present application relates to the field of satellites, and in particular to a method, device and medium for determining interference of low-orbit satellites. Background Art

[0002] In satellite communication systems, a major feature of communication satellites is their wide coverage area, and the beam of their communication antennas has a wide ground coverage / illumination area. Even low-orbit satellites can still have a coverage area of ​​several hundred kilometers in diameter. Ground communication systems serve ground users, and the main lobe of their base station antenna beams is generally horizontal or downward compared to the horizon, but there are still side lobe signals radiating upward.

[0003] Due to the vastness of the satellite coverage area, a large number of sidelobe signals may enter the satellite beam range and cause interference to the satellite receiver.

[0004] It can be seen that analyzing the aggregate interference of ground communication systems to low-orbit satellites is necessary to determine whether ground communication systems and low-orbit satellite communication systems can coexist in frequency and share spectrum. This is a technical problem that needs to be urgently solved by people in this field. Summary of the invention

[0005] The purpose of this application is to provide a method for determining interference of low-orbit satellites by analyzing the aggregate interference of ground communication systems to low-orbit satellites, so as to determine whether the ground communication system and the low-orbit satellite communication system can coexist in frequency and share spectrum.

[0006] In order to solve the above technical problems, the present application provides a method for determining interference of a low-orbit satellite, comprising:

[0007] Determine the satellite's antenna gain and pattern and the ground area covered by the satellite's beam;

[0008] Determine the location of the central station of the ground area covered by the beam, and determine the type and number of base stations and the propagation model based on the central station;

[0009] Obtain the interference value of each base station based on the type and number of base stations, propagation model, antenna gain and radiation pattern;

[0010] The aggregate interference value of the central station is determined according to the interference value of each base station.

[0011] Preferably, in the above-mentioned interference determination method of the low-orbit satellite, determining the ground area covered by the satellite beam includes:

[0012] Obtaining a preset antenna gain threshold;

[0013] The ground area covered by the satellite's beam is determined based on the preset antenna gain threshold, antenna gain and radiation pattern.

[0014] Preferably, in the above-mentioned low-orbit satellite interference determination method, determining the type, quantity and propagation model of the base station according to the central station includes:

[0015] Analyze the environment type of the central station;

[0016] Determine the interference analysis frequency band according to the environment type of the central station;

[0017] The type, quantity and propagation model of the base station are determined according to the environment type and interference analysis frequency band, where the propagation model is the link loss on the ground-to-air path.

[0018] Preferably, in the above-mentioned low-orbit satellite interference determination method, link loss includes: free space path loss, weather loss, and ground object loss.

[0019] Preferably, in the above-mentioned interference determination method for low-orbit satellites, preferably, in the above-mentioned interference determination method for low-orbit satellites, preferably, in the above-mentioned interference determination method for low-orbit satellites, after determining the aggregate interference value of the central station according to the interference value of each base station, it also includes:

[0020] Determine whether the aggregate interference value is less than a preset interference-to-noise ratio;

[0021] If so, the output frequency is compatible with the feasible result;

[0022] If not, the output frequency compatibility is not feasible.

[0023] Preferably, in the above-mentioned interference determination method for low-orbit satellites, determining the position of the central station of the ground area covered by the beam includes:

[0024] The location of the central station is determined based on the simulation modeling results of the beam coverage ground area.

[0025] Preferably, in the above-mentioned interference determination method for low-orbit satellites, determining the aggregate interference value of the central station according to the interference value of each base station includes:

[0026] Determine the aggregate interference value of the central station according to the interference value of each base station in combination with the first formula;

[0027] Among them, the first formula is: I∑=I+10log(M)

[0028] I∑ is the aggregate interference, I is the interference value of each base station, and M is the number of base stations.

[0029] In order to solve the above technical problems, the present application provides an interference determination device for a low-orbit satellite, comprising:

[0030] An area determination module is used to determine the satellite's antenna gain and pattern and the ground area covered by the satellite's beam;

[0031] A first determination module is used to determine the location of a central station of a ground area covered by the beam, and determine the type and number of base stations and a propagation model according to the central station;

[0032] A single interference value calculation module is used to obtain the interference value of each base station based on the type and number of base stations, propagation model, antenna gain and radiation pattern;

[0033] The aggregate interference value calculation module is used to determine the aggregate interference value of the central station according to the interference value of each base station.

[0034] In order to solve the above technical problems, the present application provides an interference determination device for a low-orbit satellite, comprising:

[0035] Memory for storing computer programs;

[0036] A processor is used to implement the steps of the above-mentioned low-orbit satellite interference determination method when executing a computer program.

[0037] In order to solve the above technical problems, the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the above-mentioned low-orbit satellite interference determination method are implemented.

[0038] The interference determination method for a low-orbit satellite provided in the present application includes determining the antenna gain and radiation pattern of the satellite and the ground area covered by the satellite's beam, determining the position of a central station of the ground area covered by the beam, and determining the type and number of base stations and a propagation model based on the central station, obtaining the interference value of each base station based on the type and number of base stations, the propagation model, the antenna gain and radiation pattern, and determining the aggregate interference value of the central station based on the interference value of each base station. To calculate the frequency interference of the ground communication system to the low-orbit satellite, first determine the antenna gain and radiation pattern of the satellite antenna, and determine the ground area covered by the beam participating in the interference calculation on the ground, determine the location of the central station of the ground area covered by the beam, and determine the type, number and propagation model of the base station based on the central station. Assuming that each base station has the same interference to the satellite, the base stations in an area are equivalent to the central station at a position. The aggregate interference value of the central station is the sum of the interference values ​​of individual base stations according to the number. The interference value of each base station is obtained according to the type and number of base stations, the propagation model, the antenna gain and radiation pattern. Then, the aggregate interference value of the central station is determined according to the interference value of each base station. By combining the different geographical environments of the ground area, it is obtained that the low-orbit satellite may be subjected to the aggregate interference of the ground communication system during rapid flight, which can provide a more reliable basis for the feasibility of spectrum sharing between systems and subsequent interference avoidance methods.

[0039] In addition, the present application also provides an interference determination device and medium for a low-orbit satellite, which corresponds to the above method and has the same effect as above. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 A flowchart of a method for determining interference of a low-orbit satellite provided in an embodiment of the present application;

[0042] Figure 2 A flowchart of another method for determining interference of a low-orbit satellite provided in an embodiment of the present application;

[0043] Figure 3 A schematic diagram of an interference determination device for a low-orbit satellite provided in an embodiment of the present application;

[0044] Figure 4 A structural diagram of another low-orbit satellite interference determination device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0046] The core of this application is to provide a method, device and medium for determining interference of low-orbit satellites.

[0047] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0048] The low-orbit satellite communication system is an important supplement to the ground communication system. The combination of the low-orbit satellite communication system and the ground mobile communication system is an important way to realize the "Internet of Everything" of the Internet of Things. However, due to limited spectrum resources, it is likely that spectrum sharing will be required between the ground mobile communication system and the low-orbit satellite communication system, making co-frequency interference an issue that cannot be ignored. In recent years, with the boom in the development of low-orbit satellites, spectrum sharing and interference analysis between low-orbit satellite communication systems and ground communication systems have received attention. In the interference analysis of satellite communication systems subjected to ground communication systems, the existing technologies are mainly aimed at high-orbit satellite communication systems or high- and low-orbit intersatellite communication systems, focusing on high efficiency and approximation.

[0049] Compared with high-orbit satellites, low-orbit satellites have lower orbital altitudes and faster flight speeds. The aggregate interference to low-orbit satellites from ground communication systems is characterized by small and variable coverage of satellite beams on the ground. Therefore, the research method for the aggregate interference to low-orbit satellites from ground communication systems should take into account the diversity of the beam coverage ground area environment to cover various interference scenarios that low-orbit communication satellites may face.

[0050] In the current situation of tight spectrum resources, the International Telecommunication Union (ITU) has joined hands with various industries and academia to explore spectrum sharing and interference analysis between satellite communication systems and terrestrial communication systems. Through research, it analyzes the co-frequency / adjacent-frequency interference between satellite communication systems and terrestrial communication systems in the corresponding frequency bands, and proposes interference avoidance measures.

[0051] In satellite communication systems, a major feature of communication satellites is their wide coverage area, and the beams of their communication antennas have a wide ground coverage / illumination area. Even low-orbit satellites can still have a coverage area of ​​several hundred kilometers in diameter. Ground communication systems serve ground users, and the main lobe of their base station antenna beams points generally horizontally or downwards compared to the horizon, but there are still sidelobe signals radiating upward. Due to the vastness of the satellite coverage area, a large number of sidelobe signals may enter the satellite beam range and interfere with the satellite receiver. Therefore, it is necessary to analyze the aggregate interference caused by a large number of signals from the ground communication system to satellites in order to determine whether the ground communication system and the satellite communication system can coexist in frequency and share spectrum.

[0052] In order to solve the above technical problems, the present application provides a method for determining interference of a low-orbit satellite. Figure 1 A flowchart of a method for determining interference of a low-orbit satellite provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, including:

[0053] S11: Determine the satellite's antenna gain and pattern and the satellite's beam coverage ground area;

[0054] S12: Determine the location of the central station of the ground area covered by the beam, and determine the type and number of base stations and the propagation model according to the central station;

[0055] S13: Obtaining an interference value of each base station according to the type and number of base stations, propagation model, antenna gain and radiation pattern;

[0056] S14: Determine the aggregate interference value of the central station according to the interference value of each base station.

[0057] Antenna gain refers to the ratio of the power density of the signal generated by the actual antenna and the ideal radiating unit at the same point in space under the condition of equal input power. It quantitatively describes the degree to which an antenna concentrates the input power for radiation.

[0058] The directivity of an antenna refers to its ability to radiate electromagnetic waves in a certain direction. For a receiving antenna, directivity means that the antenna has different receiving capabilities for electromagnetic waves coming from different directions. The directivity of an antenna is usually represented by a radiation pattern.

[0059] The gain is obviously closely related to the antenna pattern. The narrower the main lobe of the pattern and the smaller the side lobe, the higher the gain. Antenna gain is used to measure the ability of the antenna to send and receive signals in a specific direction. It is one of the most important parameters for selecting base station antennas. Generally speaking, the improvement of gain mainly relies on reducing the beam width of the vertical radiation while maintaining omnidirectional radiation performance in the horizontal plane. Antenna gain is extremely important to the operation quality of mobile communication systems because it determines the signal level at the edge of the cell. Increasing the gain can increase the coverage of the network in a certain direction, or increase the gain margin within a certain range. Any cellular system is a two-way process. Increasing the gain of the antenna can also reduce the gain budget margin of the two-way system.

[0060] Therefore, if the frequency interference of the ground communication system to the low-orbit satellite is to be calculated, the antenna gain and the directional pattern of the satellite antenna are first determined, and the ground area covered by the satellite beam is determined. This embodiment does not limit how to determine the ground area covered by the satellite beam. For example, the ground area covered by the satellite beam is preset in advance, or the antenna gain threshold is preset to calculate the ground area covered by the satellite beam. Preferably, determining the ground area covered by the satellite beam includes:

[0061] Obtaining a preset antenna gain threshold;

[0062] The ground area covered by the satellite's beam is determined based on the preset antenna gain threshold, antenna gain and radiation pattern.

[0063] The antenna gain threshold is preset in advance, and the ground area covered by the satellite beam is determined based on the preset antenna gain threshold, antenna gain and radiation pattern, so as to obtain the ground area covered by the beam participating in the interference calculation on the ground.

[0064] In addition, this embodiment adopts the central station method to calculate the aggregate interference value. It is assumed that each base station has the same interference to the satellite, and the base stations in an area are equivalent to the central station at a location. The aggregate interference value of the central station is the sum of the interference values ​​of individual base stations. Therefore, if the aggregate interference value needs to be calculated, the interference value of a single base station needs to be calculated first.

[0065] Based on different geographical environments and living environments, the corresponding base station deployment conditions are also different. Therefore, step S12 determines the location of the central station of the ground area covered by the beam, and determines the type, number and propagation model of the base station based on the central station. The location of the central station of the ground area covered by the beam is determined according to the actual environmental conditions, combined with geographical location, population and other factors. The location of the central station of the ground area covered by the beam can also be determined through simulation modeling results. It can be designed according to actual needs. This embodiment does not impose specific restrictions. According to the typical environment to which the central station belongs, the type, number and propagation model of the base station are determined. The propagation model refers to the link loss on the ground-to-air path. This embodiment does not limit how to determine the type, number and propagation model of the base station. It can be directly pre-set in advance according to various geographical environments, or it can be obtained based on specific data analysis.

[0066] Step S13 obtains the interference value of each base station according to the type and number of base stations, propagation model, antenna gain and radiation pattern, and step S14 determines the aggregate interference value of the central station according to the interference value of each base station.

[0067] Preferably, step S14 determines the aggregate interference value of the central station according to the interference value of each base station, including:

[0068] Determine the aggregate interference value of the central station according to the interference value of each base station in combination with the first formula;

[0069] Among them, the first formula is: ∑ =I+10log(M)

[0070] I ∑ is the aggregate interference, I is the interference value of each base station, and M is the number of base stations.

[0071] Assuming that each base station has the same interference to the satellite, the base stations in an area are equivalent to a central station at a location. The interference of the central station is the sum of the interference of individual base stations according to the number, and the concentrated interference value of the central station is calculated in this way.

[0072] The interference determination method for a low-orbit satellite provided in this embodiment includes determining the antenna gain and radiation pattern of the satellite and the ground area covered by the satellite's beam, determining the position of a central station of the ground area covered by the beam, and determining the type and number of base stations and a propagation model based on the central station, obtaining the interference value of each base station based on the type and number of base stations, the propagation model, and the antenna gain and radiation pattern, and determining the aggregate interference value of the central station based on the interference value of each base station. To calculate the frequency interference of the ground communication system to the low-orbit satellite, first determine the antenna gain and radiation pattern of the satellite antenna, and determine the ground area covered by the beam participating in the interference calculation on the ground, determine the location of the central station of the ground area covered by the beam, and determine the type, number and propagation model of the base station based on the central station. Assuming that each base station has the same interference to the satellite, the base stations in an area are equivalent to the central station at a position. The aggregate interference value of the central station is the sum of the interference values ​​of individual base stations according to the number. The interference value of each base station is obtained according to the type and number of base stations, the propagation model, the antenna gain and radiation pattern. Then, the aggregate interference value of the central station is determined according to the interference value of each base station. By combining the different geographical environments of the ground area, it is obtained that the low-orbit satellite may be subjected to the aggregate interference of the ground communication system during rapid flight, which can provide a more reliable basis for the feasibility of spectrum sharing between systems and subsequent interference avoidance methods.

[0073] According to the above embodiment, this embodiment provides a preferred solution, which determines the type, quantity and propagation model of the base station according to the central station, including:

[0074] Analyze the environment type of the central station;

[0075] Determine the interference analysis frequency band according to the environment type of the central station;

[0076] The type, quantity and propagation model of the base station are determined according to the environment type and interference analysis frequency band, where the propagation model is the link loss on the ground-to-air path.

[0077] After determining the position of the central station of the ground area covered by the beam in step S12, analyze the type of environment to which the central station belongs; determine the interference analysis frequency band according to the type of environment of the central station; determine the type, quantity and propagation model of the base station according to the type of environment and the interference analysis frequency band, wherein the propagation model is the link loss on the ground-to-air path. Cover various interference scenarios that low-orbit communication satellites may face, determine the type, quantity and propagation model of the base station according to the central station, assume that each base station has the same interference to the satellite, and treat the base stations in an area as equivalent to the central station at a position. The aggregate interference value of the central station is the sum of the interference values ​​of a single base station according to the number, and obtain the interference value of each base station according to the type and quantity of the base station, the propagation model, the antenna gain and the radiation pattern, and then determine the aggregate interference value of the central station according to the interference value of each base station. By combining the different geographical environments of the ground area, it is obtained that the low-orbit satellite may be subject to the aggregate interference of the ground communication system during rapid flight, which can provide a more reliable basis for the feasibility of spectrum sharing between systems and subsequent interference avoidance methods.

[0078] Link loss is path loss, or propagation loss, which refers to the loss caused by the propagation of radio waves in space. It is caused by the radiation diffusion of the transmitted power and the propagation characteristics of the channel, and reflects the change in the mean value of the received signal power in a macroscopic range.

[0079] In order to improve the accuracy of interference calculation, link loss includes: free space path loss, weather loss, and ground object loss.

[0080] Free space path loss refers to the energy loss of electromagnetic waves when they propagate in the air. Electromagnetic waves will experience loss when penetrating any medium. Ground loss is mainly caused by surface scattering, and the magnitude of the loss depends on the specific situation. Weather loss refers to the additional loss caused by wind speed, wind direction, rainfall, etc.

[0081] According to the above embodiment, the aggregate interference can provide a more reliable basis for the feasibility of spectrum sharing between systems and the subsequent interference avoidance method. This embodiment provides a solution, after determining the aggregate interference value of the central station according to the interference value of each base station, it also includes:

[0082] Determine whether the aggregate interference value is less than a preset interference-to-noise ratio;

[0083] If so, the output frequency is compatible with the feasible result;

[0084] If not, the output frequency compatibility is not feasible.

[0085] The interference-to-noise ratio mentioned in this embodiment is the ratio of the effective power of the interference signal to the effective power of the noise. The interference-to-noise ratio is preset in advance in the current satellite communication system. If the aggregate interference value is less than the preset interference-to-noise ratio, it means that the frequencies are compatible. If the aggregate interference value is not less than the preset interference-to-noise ratio, it means that the frequencies are incompatible and the satellite design or the ground base station deployment needs to be adjusted.

[0086] In order to enable those skilled in the art to better understand this solution, this embodiment provides a specific implementation scheme. Figure 2 A flowchart of another method for determining interference of a low-orbit satellite provided in an embodiment of the present application, such as Figure 2 As shown:

[0087] S201: Determine the antenna gain and radiation pattern of the satellite;

[0088] S202: Obtaining a preset antenna gain threshold;

[0089] S203: Determine the ground area covered by the satellite beam according to the preset antenna gain threshold, antenna gain and radiation pattern;

[0090] S204: Determine the location of the central station according to the simulation modeling result of the beam coverage ground area;

[0091] S205: Analyze the environment type of the central station;

[0092] S206: Determine an interference analysis frequency band according to the environment type of the central station;

[0093] S207: Determine the type, quantity and propagation model of the base station according to the environment type and the interference analysis frequency band, wherein the propagation model is the link loss on the ground-to-air path;

[0094] S208: Obtaining an interference value of each base station according to the type and number of base stations, propagation model, antenna gain and radiation pattern;

[0095] S209: Determine the aggregate interference value of the central station according to the interference value of each base station in combination with the first formula;

[0096] Among them, the first formula is: ∑ =I+10log(M)

[0097] I ∑ is the aggregate interference, I is the interference value of each base station, and M is the number of base stations;

[0098] S210: Determine whether the aggregate interference value is less than a preset interference-to-noise ratio;

[0099] S211: If yes, output the frequency compatible and feasible result;

[0100] S212: If not, output a result that frequency compatibility is not feasible.

[0101] First, determine the antenna gain and radiation pattern of the satellite antenna, and determine the ground area covered by the satellite beam based on the preset antenna gain threshold, antenna gain and radiation pattern. Determine the interference analysis frequency band based on the environmental type of the central station. Determine the type, number and propagation model of the base station based on the environmental type and the interference analysis frequency band. Assuming that each base station has the same interference to the satellite, the base stations in an area are equivalent to the central station at one location. The aggregate interference value of the central station is the sum of the interference values ​​of individual base stations according to the number. The interference value of each base station is obtained based on the type and number of base stations, the propagation model, antenna gain and radiation pattern. Then, the aggregate interference value of the central station is determined based on the interference value of each base station. By combining the different geographical environments of the ground area, it is obtained that the low-orbit satellite may be subject to the aggregate interference of the ground communication system during rapid flight, which can provide a more reliable basis for the feasibility of spectrum sharing between systems and subsequent interference avoidance methods.

[0102] In the above embodiments, the interference determination method for low-orbit satellites is described in detail, and the present application also provides embodiments corresponding to the interference determination device for low-orbit satellites. It should be noted that the present application describes the embodiments of the device part from two perspectives, one is based on the perspective of functional modules, and the other is based on the perspective of hardware.

[0103] Figure 3 A schematic diagram of a low-orbit satellite interference determination device provided in an embodiment of the present application, such as Figure 3 As shown, including:

[0104] The area determination module 31 is used to determine the antenna gain and directivity pattern of the satellite and the ground area covered by the satellite's beam;

[0105] A first determination module 32 is used to determine the location of the central station of the ground area covered by the beam, and determine the type and number of base stations and the propagation model according to the central station;

[0106] A single interference value calculation module 33, used to obtain the interference value of each base station according to the type and number of base stations, propagation model, antenna gain and radiation pattern;

[0107] The aggregate interference value calculation module 34 is used to determine the aggregate interference value of the central station according to the interference value of each base station.

[0108] Specifically, the area determination module 31 determines the antenna gain and radiation pattern of the satellite and the ground area covered by the satellite's beam; the first determination module 32 determines the position of the central station of the ground area covered by the beam, and determines the type and number of base stations and the propagation model based on the central station; the single interference value calculation module 33 obtains the interference value of each base station based on the type and number of base stations, the propagation model, the antenna gain and radiation pattern; the aggregate interference value calculation module 34 determines the aggregate interference value of the central station based on the interference value of each base station. To calculate the frequency interference of the ground communication system to the low-orbit satellite, first determine the antenna gain and radiation pattern of the satellite antenna, and determine the ground area covered by the beam participating in the interference calculation on the ground, determine the location of the central station of the ground area covered by the beam, and determine the type, number and propagation model of the base station based on the central station. Assuming that each base station has the same interference to the satellite, the base stations in an area are equivalent to the central station at a position. The aggregate interference value of the central station is the sum of the interference values ​​of individual base stations according to the number. The interference value of each base station is obtained according to the type and number of base stations, the propagation model, the antenna gain and radiation pattern. Then, the aggregate interference value of the central station is determined according to the interference value of each base station. By combining the different geographical environments of the ground area, it is obtained that the low-orbit satellite may be subjected to the aggregate interference of the ground communication system during rapid flight, which can provide a more reliable basis for the feasibility of spectrum sharing between systems and subsequent interference avoidance methods.

[0109] Since the embodiments of the apparatus part correspond to the embodiments of the method part, please refer to the description of the embodiments of the method part for the embodiments of the apparatus part, which will not be repeated here.

[0110] Figure 4 A structural diagram of another low-orbit satellite interference determination device provided in an embodiment of the present application, such as Figure 4 As shown, the interference determination device for a low-orbit satellite includes: a memory 40 for storing a computer program;

[0111] The processor 41 is used to implement the steps of the method for obtaining user operation habit information in the above embodiment (the method for determining interference of low-orbit satellites) when executing the computer program.

[0112] The low-orbit satellite interference determination device provided in this embodiment may include but is not limited to a smart phone, a tablet computer, a laptop computer, or a desktop computer.

[0113] Among them, the processor 41 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 41 can be implemented in at least one hardware form of a digital signal processor (DSP), a field-programmable gate array (FPGA), and a programmable logic array (PLA). The processor 41 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a central processing unit (CPU); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 41 may be integrated with a graphics processing unit (GPU), and the GPU is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 41 may also include an artificial intelligence (AI) processor, which is used to process computing operations related to machine learning.

[0114] The memory 40 may include one or more computer-readable storage media, which may be non-transitory. The memory 40 may also include a high-speed random access memory, and a non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In this embodiment, the memory 40 is at least used to store the following computer program 401, wherein, after the computer program is loaded and executed by the processor 41, it can implement the relevant steps of the interference determination method for the low-orbit satellite disclosed in any of the aforementioned embodiments. In addition, the resources stored in the memory 40 may also include an operating system 402 and data 403, etc., and the storage method may be temporary storage or permanent storage. Among them, the operating system 402 may include Windows, Unix, Linux, etc. Data 403 may include but is not limited to data involved in implementing the interference determination method for the low-orbit satellite, etc.

[0115] In some embodiments, the interference determination device for a low-orbit satellite may further include a display screen 42 , an input / output interface 43 , a communication interface 44 , a power supply 45 , and a communication bus 46 .

[0116] Those skilled in the art will understand that Figure 4 The structure shown in the figure does not constitute a limitation on the interference determination device for low-orbit satellites, and may include more or fewer components than those shown in the figure.

[0117] The interference determination device for a low-orbit satellite provided in an embodiment of the present application includes a memory and a processor. When the processor executes the program stored in the memory, it can implement the following method: a method for determining the interference of a low-orbit satellite, including determining the antenna gain and radiation pattern of the satellite and the ground area covered by the satellite's beam, determining the position of the central station of the ground area covered by the beam, and determining the type and number of base stations and the propagation model according to the central station, obtaining the interference value of each base station according to the type and number of base stations, the propagation model, the antenna gain and radiation pattern, and determining the aggregate interference value of the central station according to the interference value of each base station. To calculate the frequency interference of the ground communication system to the low-orbit satellite, first determine the antenna gain and radiation pattern of the satellite antenna, and determine the ground area covered by the beam participating in the interference calculation on the ground, determine the location of the central station of the ground area covered by the beam, and determine the type, number and propagation model of the base station based on the central station. Assuming that each base station has the same interference to the satellite, the base stations in an area are equivalent to the central station at a position. The aggregate interference value of the central station is the sum of the interference values ​​of individual base stations according to the number. The interference value of each base station is obtained according to the type and number of base stations, the propagation model, the antenna gain and radiation pattern. Then, the aggregate interference value of the central station is determined according to the interference value of each base station. By combining the different geographical environments of the ground area, it is obtained that the low-orbit satellite may be subjected to the aggregate interference of the ground communication system during rapid flight, which can provide a more reliable basis for the feasibility of spectrum sharing between systems and subsequent interference avoidance methods.

[0118] Finally, the present application also provides an embodiment corresponding to a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps described in the above-mentioned low-orbit satellite interference determination method embodiment are implemented.

[0119] It is understandable that if the method in the above embodiment is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

[0120] The computer-readable storage medium provided in this embodiment has a computer program stored thereon. When a processor executes the program, the following method can be implemented: a method for determining interference of a low-orbit satellite, comprising determining the antenna gain and radiation pattern of the satellite and the ground area covered by the satellite's beam, determining the position of a central station of the ground area covered by the beam, and determining the type and number of base stations and a propagation model based on the central station, obtaining the interference value of each base station based on the type and number of base stations, the propagation model, the antenna gain and radiation pattern, and determining the aggregate interference value of the central station based on the interference value of each base station. To calculate the frequency interference of the ground communication system to the low-orbit satellite, first determine the antenna gain and radiation pattern of the satellite antenna, and determine the ground area covered by the beam participating in the interference calculation on the ground, determine the location of the central station of the ground area covered by the beam, and determine the type, number and propagation model of the base station based on the central station. Assuming that each base station has the same interference to the satellite, the base stations in an area are equivalent to the central station at a position. The aggregate interference value of the central station is the sum of the interference values ​​of individual base stations according to the number. The interference value of each base station is obtained according to the type and number of base stations, the propagation model, the antenna gain and radiation pattern. Then, the aggregate interference value of the central station is determined according to the interference value of each base station. By combining the different geographical environments of the ground area, it is obtained that the low-orbit satellite may be subjected to the aggregate interference of the ground communication system during rapid flight, which can provide a more reliable basis for the feasibility of spectrum sharing between systems and subsequent interference avoidance methods.

[0121] The above is a detailed introduction to the interference determination method, device and medium for low-orbit satellites provided by the present application. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the embodiments can refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can refer to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

[0122] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. A method for determining interference of a low-orbit satellite, characterized in that: include: Determining the antenna gain and pattern of a satellite and the ground area covered by the beam of said satellite; Determine the location of the central station of the ground area covered by the beam, and determine the type and number of base stations and the propagation model based on the central station; Obtaining an interference value of each base station according to the type and number of the base stations, the propagation model, the antenna gain and the directivity pattern; Determine the aggregate interference value of the central station according to the interference value of each base station; Wherein, determining that the beam of the satellite covers the ground area includes: Obtaining a preset antenna gain threshold; Determine the ground area covered by the satellite's beam according to the preset antenna gain threshold, the antenna gain and the directional pattern; Wherein, determining the type, quantity and propagation model of the base station according to the central station includes: Analyzing the type of environment to which the central station belongs; Determining an interference analysis frequency band according to the environment type of the central station; Determine the type and quantity of the base station and the propagation model according to the environment type and the interference analysis frequency band, wherein the propagation model is the link loss on the ground-to-air path; The link loss includes: free space path loss, weather loss, and ground object loss; Wherein, after determining the aggregate interference value of the central station according to the interference value of each base station, the method further includes: Determining whether the aggregate interference value is less than a preset interference-to-noise ratio; If so, the output frequency is compatible with the feasible result; If not, the output frequency compatibility is not feasible; The determining the position of the central station of the ground area covered by the beam comprises: determining the position of the central station according to the simulation modeling result of the ground area covered by the beam; The step of determining the aggregate interference value of the central station according to the interference value of each base station includes: Determine the aggregate interference value of the central station according to the interference value of each base station in combination with the first formula; Among them, the first formula is: ∑ =I+10log(M); I ∑ is the aggregate interference, I is the interference value of each base station, and M is the number of base stations.

2. A low-orbit satellite interference determination device, characterized in that: include: An area determination module, used to determine the antenna gain and directivity pattern of the satellite and the ground area covered by the beam of the satellite; A first determination module is used to determine the position of the central station of the ground area covered by the beam, and determine the type and number of base stations and the propagation model according to the central station; A single interference value calculation module, used to obtain the interference value of each base station according to the type and number of the base stations, the propagation model, the antenna gain and the directivity diagram; An aggregate interference value calculation module, used to determine the aggregate interference value of the central station according to the interference value of each base station; Wherein, determining that the beam of the satellite covers the ground area includes: Obtaining a preset antenna gain threshold; Determine the ground area covered by the satellite's beam according to the preset antenna gain threshold, the antenna gain and the directional pattern; Wherein, determining the type, quantity and propagation model of the base station according to the central station includes: Analyzing the type of environment to which the central station belongs; Determining an interference analysis frequency band according to the environment type of the central station; Determine the type and quantity of the base station and the propagation model according to the environment type and the interference analysis frequency band, wherein the propagation model is the link loss on the ground-to-air path; The link loss includes: free space path loss, weather loss, and ground object loss; Wherein, after determining the aggregate interference value of the central station according to the interference value of each base station, the method further includes: Determining whether the aggregate interference value is less than a preset interference-to-noise ratio; If so, the output frequency is compatible with the feasible result; If not, the output frequency compatibility is not feasible; The determining the position of the central station of the ground area covered by the beam comprises: determining the position of the central station according to the simulation modeling result of the ground area covered by the beam; The step of determining the aggregate interference value of the central station according to the interference value of each base station includes: Determine the aggregate interference value of the central station according to the interference value of each base station in combination with the first formula; Among them, the first formula is: ∑ =I+10log(M); I ∑ is the aggregate interference, I is the interference value of each base station, and M is the number of base stations.

3. A low-orbit satellite interference determination device, characterized in that: include: Memory for storing computer programs; A processor is used to implement the steps of the interference determination method for a low-orbit satellite as claimed in claim 1 when executing the computer program.

4. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the interference determination method for a low-orbit satellite as claimed in claim 1 are implemented.

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