A method, device and medium for evaluating acceptable aggregate interference of intersatellite link system

Abstract

The present invention discloses an intersatellite link system acceptable aggregate interference assessment method, device and medium, wherein the method comprises: selecting an interfered system and multiple co-frequency communication systems as interfering systems; obtaining system characteristic parameters and orbital position parameters of the interfered system and the interfering system; calculating the interference value of the interfered intersatellite link by the co-frequency communication link according to each system parameter; calculating the aggregate interference value of the interfered intersatellite link at each simulation moment according to the interference value, and judging whether the aggregate interference value exceeds the standard. The present invention comprehensively considers the frequency sharing environment of the intersatellite link, increases the interference consideration within the intersatellite link system, and also increases the situation where the intersatellite link, satellite-to-ground link and ground link outside the system jointly generate interference, which can more accurately reflect the actual degree of aggregate interference received by the intersatellite link system in actual on-orbit operation, and effectively improve the accuracy of the intersatellite link frequency sharing compatibility assessment results.

Description

Technical Field

[0001] The present invention relates to the technical field of evaluating the acceptable aggregate interference of an inter-satellite link satellite system, and in particular to a method, device and medium for evaluating the acceptable aggregate interference of an inter-satellite link system. Background Art

[0002] There are two main types of links in satellite communications: satellite-to-ground links and inter-satellite links. Satellite-to-ground links refer to the communication links between satellites and ground equipment, while inter-satellite links refer to the radio signal transmission links between satellites.

[0003] According to the international frequency division and my country's national frequency division regulations, there are situations in which satellite-to-ground links and inter-satellite links operate simultaneously in the Ka-band, resulting in increasingly prominent frequency compatibility issues between inter-satellite links and satellite-to-ground links of different satellite systems using the same frequency. In the process of planning, demonstrating and operating the inter-satellite link system on-orbit, it is necessary to evaluate the frequency compatibility between its frequency range and other systems.

[0004] The existing evaluation methods generally adopt bilateral coordination, that is, only analyzing the interference between inter-satellite systems and other inter-satellite systems, or only analyzing the interference between inter-satellite systems and other satellite-to-ground systems. The impact of other co-frequency systems is often ignored, and it is impossible to truly reflect the degree of aggregate interference to the inter-satellite link system.

[0005] Document number CN117375705A discloses a method for evaluating interference between a feed-side NGSO satellite system and a GSO satellite system. This application can comprehensively evaluate the spatial distribution of interference between the NGSO satellite system and the GSO satellite system, and provide a theoretical basis for the construction of NGSO satellite gateways, the selection of NGSO satellite gateways, and the power control of NGSO satellites. However, it also has the problem that the impact of other co-frequency systems is not evaluated, and the degree of aggregate interference to the intersatellite link system cannot be truly reflected.

[0006] In view of the current situation in which there is a lack of comprehensive analysis methods for the aggregate interference assessment of inter-satellite links, satellite-to-ground links, and ground links in the above-mentioned inter-satellite communication field, a method for comprehensively evaluating the frequency compatibility of inter-satellite link systems is needed, so that relevant field organizations can conduct quantitative analysis of the frequency environment and compatibility of inter-satellite link systems during the planning, demonstration, and on-orbit operation management of inter-satellite link business systems, so as to take necessary technical measures to optimize the system design and ensure the safety of the system's on-orbit frequency use. Summary of the invention

[0007] The object of the present invention is to provide an inter-satellite link system acceptable aggregate interference assessment method, device and medium, which can comprehensively assess the aggregate interference values ​​of inter-satellite links, satellite-to-ground links and ground links, and truly reflect the degree of aggregate interference suffered by the inter-satellite link system.

[0008] The embodiments of the present invention provide a method, a device and a medium for evaluating acceptable aggregate interference of an inter-satellite link system.

[0009] A first aspect: A method for evaluating acceptable aggregate interference of an inter-satellite link system, comprising:

[0010] S1. Select an intersatellite link system as the interfered system and determine multiple co-frequency communication systems as the interfering systems;

[0011] S2. Obtaining system characteristic parameters of the interfered system and the interfering system;

[0012] S3, simulating and running the interfered system and the interfering system in the simulation system, and obtaining orbital position parameters of the interfered system and the interfering system at each simulation moment;

[0013] S4, calculating, at each simulation moment, the interference value of the interfered intersatellite link in the interfered system by the co-frequency communication link in each interfering system based on the characteristic parameters of each system and the orbital position parameters of the simulated operation of each system;

[0014] S5. Calculate the aggregate interference value of the interfered intersatellite link at each simulation moment according to the interference value of each co-frequency communication link suffered by the interfered intersatellite link at each simulation moment, and determine whether the aggregate interference value exceeds the standard.

[0015] Further, the co-frequency communication system includes: an inter-satellite link system of a cooperative organization, an inter-satellite link system of a non-cooperative organization, a satellite-to-ground link system of a non-cooperative organization, and a ground link system of a non-cooperative organization;

[0016] The co-frequency communication links include: inter-satellite links within the inter-satellite link system of the cooperative organization, inter-satellite links within the inter-satellite link system of the non-cooperative organization, satellite-to-ground links within the satellite-to-ground link system of the non-cooperative organization, and ground links within the ground link system of the non-cooperative organization.

[0017] Furthermore, the obtaining of system characteristic parameters of the interfered system and the interfering system includes: frequency, antenna type, transmit power and bandwidth parameters.

[0018] Furthermore, when simulating and running the interfered system and the interfering system in the simulation system, the simulation system settings include:

[0019] Simulation step size, simulation start and end time, initial parameters of satellite orbits in the interfered system and the interfering system, and location parameters of the earth station, receiving station and transmitting station in the interfering system.

[0020] Furthermore, in S4, the interference value of the interfered intersatellite link in the interfered system at each simulation moment is calculated by the formula:

[0021]

[0022] Among them, M is the number of interference systems, and m refers to the m-th interference system among them; N is the number of other co-frequency communication links in the interference system m, and i is the i-th co-frequency communication link in the interference system m. Ix(i) is the interference value of the interfered system by the i-th co-frequency communication link. I m is the interference value of the interfered system m.

[0023] Further, in S5, the total interference value received by the interfered system at each simulation moment is calculated, and the formula is expressed as:

[0024]

[0025] Among them, I is the total interference value received by the interfered system, and Im is the interference value of the interfered system m.

[0026] Further, in S5, it is judged whether the total interference value exceeds the standard, and the conditions include:

[0027] Determine the acceptable total interference Ith of the interfered inter-satellite link, and compare it with the total interference value I received by the interfered inter-satellite link. If I < Ith, the total interference value does not exceed the standard, otherwise the total interference value exceeds the standard.

[0028] Further, it further includes:

[0029] S7. Statistically count the time when the total interference value exceeds the standard during the simulation time, and obtain the probability of the interference exceeding the standard time. The formula is expressed as:

[0030]

[0031] Among them, P is the probability of the interference exceeding the standard time, and T N is the total interference exceeding the standard time, and T th is the effective working time of the interfered system.

[0032] Second aspect: An electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the steps of the method provided in the first aspect.

[0033] Third aspect: A non-transitory computer-readable storage medium, on which a computer program is stored. The computer program, when executed by a processor, implements the steps of the method provided in the first aspect.

[0034] Advantages of the present invention:

[0035] 1. The present invention comprehensively considers the frequency sharing environment of the intersatellite link, increases the interference considerations within the intersatellite link system, and also increases the situation where the intersatellite link, satellite-to-ground link and ground link outside the system jointly generate interference. It can more accurately reflect the actual degree of aggregate interference suffered by the intersatellite link system during its actual on-orbit operation, and effectively improve the accuracy of the intersatellite link frequency sharing compatibility assessment effect.

[0036] 2. The present invention adopts simulation means to simulate the operation of the interfered system and the interfering system, so as to obtain the accurate orbital position parameters of each system. By using the conventional characteristic parameters such as the frequency, antenna characteristics, transmission power, bandwidth, etc. of each system, the aggregate interference calculation can be conveniently performed. The scheme is simple to use and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic flow chart of a method for evaluating acceptable aggregate interference of an inter-satellite link system according to the present invention;

[0038] Figure 2 It is a structural schematic diagram of an acceptable aggregate interference assessment device for an inter-satellite link system according to the present invention;

[0039] Figure 3 It is a schematic diagram of the structure of the electronic device of the present invention. DETAILED DESCRIPTION

[0040] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0041] The existing methods for assessing the degree of aggregate interference generally adopt bilateral coordination, that is, only analyzing the interference between inter-satellite systems and other inter-satellite systems, or only analyzing the interference between inter-satellite systems and other satellite-to-ground systems. The impact of other co-frequency systems is often ignored, and it is impossible to truly reflect the degree of aggregate interference suffered by the inter-satellite link system.

[0042] In view of the above problems, the present invention provides a method for evaluating acceptable aggregate interference of an inter-satellite link system. Figure 1 A flow chart of a method for evaluating acceptable aggregate interference of an intersatellite link system provided by an embodiment of the present invention, the method comprising the steps of:

[0043] S1. Select an intersatellite link of a satellite system as the interfered system and determine multiple co-frequency communication systems as the interfering systems;

[0044] S2. Obtaining system characteristic parameters of the interfered system and the interfering system;

[0045] S3, simulating and running the interfered system and the interfering system in the simulation system, and obtaining orbital position parameters of the interfered system and the interfering system at each simulation moment;

[0046] S4, calculating the interference value of each interfering system on the interfered system at each simulation moment according to the characteristic parameters of each system and the orbital position parameters of each system simulation operation;

[0047] S5. Calculate the aggregate interference value suffered by the interfered system at each simulation moment according to the interference values ​​of each interfering system suffered by the interfered system at each simulation moment, and determine whether the aggregate interference value exceeds the standard.

[0048] The following is a specific example to illustrate:

[0049] Embodiment 1, as Figure 2 As shown:

[0050] Five systems A, B, C, D, and E involving co-frequency communication are selected, among which A is the interfered intersatellite link system. As the interfered system, an interfered intersatellite link is selected in satellite system A to calculate the aggregate interference value. A is the intersatellite link system of the user itself or the cooperative organization, and the parameters of the intersatellite link system A can be accurately obtained.

[0051] The intersatellite link system B from a non-cooperative organization is used as the interference system, the satellite-to-ground link systems C and D from a non-cooperative organization are used as the interference system, and the ground link system E from a non-cooperative organization is used as the interference system.

[0052] The characteristic parameters of the A, B, C, D, and E systems are obtained respectively, including conventional parameters such as the frequency, antenna type, transmission power, and bandwidth used by each satellite device or earth station, receiving station, and transmitting station in the system. These parameters can be obtained through public data queries and can be used to perform frequency compatibility calculations.

[0053] The simulation system is set up, including the simulation step size, simulation start and end time, initial parameters of satellite orbits of inter-satellite link system A, inter-satellite link system B, satellite-to-ground link systems C and D, as well as the location parameters of the earth stations of satellite-to-ground link systems C and D and the receiving and transmitting stations of the ground link system E.

[0054] By setting up the simulation system, the positional relationship between the satellites in the interfered system and the interfering system, between the satellite and the earth station, and between the ground receiving station and the transmitting station can be obtained at each simulation moment, providing accurate relative position data for the aggregate interference operation, which is conducive to accurately obtaining the aggregate interference value.

[0055] Then, the interference value of each interfering system on the interfered intersatellite link is calculated by using the system characteristic parameters of the communication systems A, B, C, D, and E involving the same frequency and the orbital position parameters of the simulated operation of each device. The process is as follows:

[0056] Calculate the interference value of the interfered intersatellite link by its own intersatellite link system A at each simulation moment, that is, the system-wide intersatellite link interference of other co-frequency intersatellite links in the A satellite system to the specified interfered intersatellite link. The formula is:

[0057]

[0058] Where a represents the intersatellite link system A of the cooperative organization, J is the number of other same-frequency intersatellite links in the intersatellite link system A, j is the jth same-frequency intersatellite link in the intersatellite link system A, Ia(j) is the interference value of the interfered intersatellite link caused by the jth co-frequency intersatellite link in the intersatellite link system A, and Ia is the interference value of the designated interfered intersatellite link caused by other co-frequency intersatellite links in the intersatellite link system A.

[0059] Calculate the interference value of the interfered intersatellite link by the intersatellite link system B of the non-cooperative organization at each simulation moment, that is, the interference of the intersatellite link operating at the same frequency in the B satellite system to the specified interfered intersatellite link. The formula is:

[0060]

[0061] Wherein, b represents the intersatellite link system B of the non-cooperative organization, K is the number of other same-frequency intersatellite links in the intersatellite link system B, k is the kth same-frequency intersatellite link in the intersatellite link system B, Ib(k) is the interference value of the interfered intersatellite link caused by the kth co-frequency intersatellite link in the intersatellite link system B, and Ib is the interference value of the specified interfered intersatellite link caused by the co-frequency intersatellite link in the intersatellite link system B.

[0062] Calculate the interference value of the interfered intersatellite link by the satellite-to-ground link system C of the non-cooperative organization at each simulation moment, that is, the interference of the satellite-to-ground link operating at the same frequency in the C satellite-to-ground link system to the specified interfered intersatellite link. The formula is:

[0063]

[0064] Where c represents the satellite-to-ground link system C of the non-cooperative organization, F is the number of other co-frequency satellite-to-ground links in the satellite-to-ground link system C, and f is the fth co-frequency satellite-to-ground link in the satellite-to-ground link system C. Ic(f)is the interference value of the interfered intersatellite link caused by the fth co-frequency satellite-to-ground link in the satellite-to-ground link system C, and Ic is the interference value of the designated interfered intersatellite link caused by the satellite-to-ground link operating at the same frequency in the satellite-to-ground link system C.

[0065] Calculate the interference value of the interfered intersatellite link by the satellite-to-ground link system D of the non-cooperative organization at each simulation moment, that is, the interference of the satellite-to-ground link operating at the same frequency in the D satellite-to-ground link system to the specified interfered intersatellite link. The formula is:

[0066]

[0067] Where d represents the satellite-to-ground link system D of the non-cooperative organization, L is the number of other co-frequency satellite-to-ground links in the satellite-to-ground link system D, l is the lth co-frequency satellite-to-ground link in the satellite-to-ground link system D, Id(l) Id is the interference value of the interfered intersatellite link caused by the lth co-frequency satellite-to-ground link in the satellite-to-ground link system D, and Id is the interference value of the satellite-to-ground link operating at the same frequency from the satellite-to-ground link system D on the specified interfered intersatellite link.

[0068] Calculate the interference value of the interfered intersatellite link by the ground link system E of the non-cooperative organization at each simulation moment, that is, the interference of the ground link operating at the same frequency in the E ground link system to the specified interfered intersatellite link. The formula is:

[0069]

[0070] Wherein, e represents the ground link system E of the non-cooperative organization, T is the number of other co-frequency ground links in the ground link system E, t is the tth co-frequency ground link in the ground link system E, Ie(t) is the interference value of the interfered intersatellite link caused by the tth co-frequency ground link in the ground link system E, and Ie is the interference value of the specified interfered intersatellite link caused by the ground link operating at the same frequency from the ground link system E.

[0071] Calculate the aggregate interference value of the specified interfered intersatellite link in the interfered system at each simulation moment:

[0072]

[0073] I is the aggregate interference value received, and then judge whether the aggregate interference value exceeds the standard:

[0074] Determine the acceptable aggregate interference I of the interfered intersatellite link th , compared with the aggregate interference value I of the interfered intersatellite link, if I th , the aggregate interference value does not exceed the standard, otherwise the aggregate interference value exceeds the standard.

[0075] ​The acceptable aggregate interference of the interfered intersatellite link refers to the maximum permissible aggregate interference level under the conditions that the intersatellite link designated as the interfered intersatellite link in the intersatellite link system A meets its functional and performance indicators when it works normally.

[0076] Furthermore, the method may include the following steps:

[0077] S7. Count the time when the aggregate interference value exceeds the standard within the simulation time, and obtain the probability of the interference exceeding the standard time. The formula is expressed as:

[0078]

[0079] Where P is the probability of interference exceeding the standard time, T N is the total interference exceeding standard time, T th It is the effective working time of the interfered system.

[0080] By counting the interference exceeding time in the simulation time, calculating the ratio of the interference exceeding time to the effective working time of the interfered system, the probability conclusion of the interference exceeding time is obtained, so as to better guarantee the operation of the interfered system.

[0081] The present invention also provides an electronic device, Figure 3 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention, such as Figure 3 As shown, the electronic device may include: a processor, a communications interface, a memory, and a communications bus, wherein the processor, the communications interface, and the memory communicate with each other via the communications bus. The processor may call the logic instructions in the memory to execute the following method:

[0082] S1. Select an intersatellite link system as the interfered system and determine multiple co-frequency communication systems as the interfering systems;

[0083] S2. Obtaining system characteristic parameters of the interfered system and the interfering system;

[0084] S3, simulating and running the interfered system and the interfering system in the simulation system, and obtaining orbital position parameters of the interfered system and the interfering system at each simulation moment;

[0085] S4, calculating, at each simulation moment, the interference value of the interfered intersatellite link in the interfered system by the co-frequency communication link in each interfering system based on the characteristic parameters of each system and the orbital position parameters of the simulated operation of each system;

[0086] S5. Calculate the aggregate interference value of the interfered intersatellite link at each simulation moment according to the interference value of each co-frequency communication link suffered by the interfered intersatellite link at each simulation moment, and determine whether the aggregate interference value exceeds the standard.

[0087] In addition, the logic instructions in the above-mentioned memory can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0088] An embodiment of the present invention further provides a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the method provided in each of the above embodiments is implemented, for example, including:

[0089] S1. Select an intersatellite link system as the interfered system and determine multiple co-frequency communication systems as the interfering systems;

[0090] S2. Obtaining system characteristic parameters of the interfered system and the interfering system;

[0091] S3, simulating and running the interfered system and the interfering system in the simulation system, and obtaining orbital position parameters of the interfered system and the interfering system at each simulation moment;

[0092] S4, calculating, at each simulation moment, the interference value of the interfered intersatellite link in the interfered system by the co-frequency communication link in each interfering system based on the characteristic parameters of each system and the orbital position parameters of the simulated operation of each system;

[0093] S5. Calculate the aggregate interference value of the interfered intersatellite link at each simulation moment according to the interference value of each co-frequency communication link suffered by the interfered intersatellite link at each simulation moment, and determine whether the aggregate interference value exceeds the standard.

[0094] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0095] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for evaluating acceptable aggregate interference of an intersatellite link system, characterized in that: Includes steps: S1. Select an intersatellite link system as the interfered system and determine multiple co-frequency communication systems as the interfering systems; S2. Obtaining system characteristic parameters of the interfered system and the interfering system; S3, simulating and running the interfered system and the interfering system in the simulation system, and obtaining orbital position parameters of the interfered system and the interfering system at each simulation moment; S4, calculating, at each simulation moment, the interference value of the interfered intersatellite link in the interfered system by the co-frequency communication link in each interfering system based on the characteristic parameters of each system and the orbital position parameters of the simulated operation of each system; S5. Calculate the aggregate interference value of the interfered intersatellite link at each simulation moment according to the interference value of each co-frequency communication link received by the interfered intersatellite link at each simulation moment, and determine whether the aggregate interference value exceeds the standard; The same-frequency communication system includes: an inter-satellite link system of a cooperative institution, an inter-satellite link system of a non-cooperative institution, a satellite-to-ground link system of a non-cooperative institution, and a ground link system of a non-cooperative institution; The same-frequency communication links include: inter-satellite links within the inter-satellite link system of the cooperative organization, inter-satellite links within the inter-satellite link system of the non-cooperative organization, satellite-to-ground links within the satellite-to-ground link system of the non-cooperative organization, and ground links within the ground link system of the non-cooperative organization; In S4, the interference value of the interfered intersatellite link in the interfered system at each simulation moment is calculated, and the formula is expressed as: ； Wherein, M is the number of interference systems, m refers to the mth interference system; N is the number of co-frequency communication links in interference system m, i is the i-th co-frequency communication link in interference system m, Ix(i) is the interference value of the interfered system caused by the i-th co-frequency communication link, I m is the interference value of the disturbed system m; In S5, the aggregate interference value of the interfered system at each simulation moment is calculated, and the formula is expressed as: ； Where I is the aggregate interference value of the interfered system, I m is the interference value of the disturbed system m; The S5 determines whether the total interference value exceeds the standard, and the conditions include: determining the acceptable total interference Ith of the interfered inter-satellite link th , comparing it with the total interference value I received by the interfered inter-satellite link. If I < Ith, the total interference value does not exceed the standard; otherwise, the total interference value exceeds the standard.

2. The method for evaluating acceptable aggregate interference of an inter-satellite link system according to claim 1, characterized in that: The obtaining of system characteristic parameters of the interfered system and the interfering system includes: frequency, antenna type, transmission power and bandwidth parameters.

3. The method for evaluating acceptable aggregate interference of an inter-satellite link system according to claim 1, characterized in that: When simulating and running the interfered system and the interfering system in the simulation system, the simulation system settings include: Simulation step size, simulation start and end time, initial parameters of satellite orbits in the interfered system and the interfering system, and location parameters of the earth station, receiving station and transmitting station in the interfering system.

4. The method for evaluating acceptable aggregate interference of an inter-satellite link system according to claim 1, characterized in that: Also includes: S7. Count the time when the aggregate interference value exceeds the standard within the simulation time, and obtain the probability of the interference exceeding the standard time. The formula is expressed as: ； Where P is the probability of interference exceeding the standard time, T N is the total interference exceeding standard time, T th It is the effective working time of the interfered system.

5. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps of the method for evaluating acceptable aggregate interference of an inter-satellite link system according to any one of claims 1 to 4 are implemented.

6. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for evaluating acceptable aggregate interference of an inter-satellite link system according to any one of claims 1 to 4 are implemented.

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