CN116667953B - Satellite communication intensity calculation method based on chess chessboard - Google Patents

Abstract

The present invention provides a method for calculating the communication strength of a chessboard, the method is applied to a mobile station, the mobile stations are connected via a satellite communication system, the method comprises: establishing a two-dimensional world map, importing the two-dimensional world map into the satellite communication system and generating a chessboard; dividing the chessboard according to longitude and latitude, and dividing the chessboard into a plurality of chess grids; and determining the signal strength between the satellite communication system and the mobile station based on the distance distribution between the mobile station and the chess grids. The present invention replaces the distance parameter in the traditional calculation method with the chess grid, and corresponds the ground station, the satellite and the chess grid one by one, so as to facilitate intuitive observation of the distance between the mobile station and the satellite and the ground station, simplify the size of the data, and thus significantly reduce the calculation complexity.

Description

A method for calculating satellite communication strength based on war chess board

Technical Field

The present invention relates to the technical field of war game simulation, and in particular to a method for calculating satellite communication strength based on a war game board.

Background Art

War games use chess pieces to represent combat units, chessboards to represent battlefields, and the movement of chess pieces on the chessboard to represent combat actions. Based on war experience, the probability of battlefield events is compiled into a decision table, and the results of actions are determined by generating random numbers and looking up the event results from the decision table; war games are combat tools that use a turn-based system to simulate war decision-making. War game simulations have become one of the effective combat simulation and training methods recognized by the world's major military powers.

Existing methods for calculating communication on a wargame board are complex and cannot distinguish the strength of communication in different scenarios.

Summary of the invention

In order to solve the existing technical problems, an embodiment of the present invention provides a method for calculating satellite communication strength based on a war chess board.

In a first aspect, an embodiment of the present invention provides a method for calculating satellite communication strength based on a chessboard, including: the method is applied to a mobile station, the mobile stations are connected via a satellite communication system, and the method includes:

Establishing a two-dimensional world map, importing the two-dimensional world map into the satellite communication system and generating a chessboard;

Divide the chessboard according to longitude and latitude, and divide the chessboard into a plurality of chess grids;

Based on the distance distribution between the mobile station and the grid, the signal strength between the satellite communication system and the mobile station is determined.

In the solution provided in the first aspect of the present invention, a chessboard of a two-dimensional world map is generated in the satellite communication system, and the chessboard is divided into a plurality of chess grids, and the communication strength between the mobile station and the satellite communication system is determined by using the distance between the mobile station and the chess grids. Compared with the prior art that directly uses complex algorithms, the distance parameter in the traditional calculation method is replaced with the chess grids, and the ground station, the satellite and the chess grids are matched one by one, which makes it easier to intuitively observe the distance between the mobile station and the satellite and the ground station, simplifies the size of the data, and thus significantly reduces the calculation complexity.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the background technology, the drawings required for use in the embodiments of the present invention or the background technology will be described below.

FIG1 shows a flow chart of a method for calculating satellite communication strength based on a chess board according to an embodiment of the present invention;

FIG2 is a schematic diagram showing a method for calculating the communication strength expected by a weapon provided by an embodiment of the present invention, in which a mobile station and a ground station are located in the same chessboard;

FIG3 is a schematic diagram showing a method for calculating the communication strength expected by a weapon provided by an embodiment of the present invention, in which a mobile station and a satellite are located in the same chessboard;

FIG4 is a schematic diagram showing the equal distances between a mobile station and a ground station and between a mobile station and a satellite in a method for calculating the communication strength expected by a weapon provided by an embodiment of the present invention;

FIG5 shows a flow chart of calculating the signal strength after the mobile station moves to another position in a method for calculating the communication strength expected by a weapon provided by an embodiment of the present invention;

FIG6 shows a schematic diagram of the structure of a device for calculating the communication strength expected by a weapon provided by an embodiment of the present invention;

FIG. 7 shows a schematic diagram of the structure of an electronic device for executing a communication strength calculation method provided by an embodiment of the present invention.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. In order to enable technicians in this technical field to better understand the solutions of the present invention, the present invention is further described in detail below in combination with the drawings and specific implementation methods.

The calculation of satellite communication strength in wargame systems mostly uses actual physical parameters (such as length, height or elevation angle), which usually involve mobile stations (also known as handheld mobile communication terminals), satellites and ground stations. The access strength of the communication signal of the satellite communication system is directly related to the distance between the mobile station and the ground station and the distance between the mobile station and the satellite, and is also affected by the weather, terrain, battlefield and other environmental factors. When the mobile station is far away from the ground station or satellite, the number of parameter bits involved will increase, resulting in an increase in the amount of calculation. At the same time, traditional physical parameters cannot be observed efficiently in wargame systems, and fast selection cannot be made for different access situations. Usually, wargames use chess pieces (operators) to represent combat units, chessboards (grid maps) to represent battlefields, and the movement of chess pieces on the chessboard to represent combat actions. Based on war experience, the probability of battlefield events is compiled into a decision table; the results of actions are determined by generating random numbers and checking the event results from the decision table; and a combat simulation tool that uses a turn-based system to simulate war decisions. Wargame simulation is one of the effective combat simulation and training methods recognized by the world's major military powers.

At present, the calculation of satellite communication access strength depends on real physical parameters, which are substituted into the Fleiss propagation formula and directly calculated using the spatial free loss formula. However, the above calculation method for obtaining satellite communication access strength is relatively complicated and labor-intensive, and the required physical parameters cannot be observed intuitively, especially the selection of different calculation methods under different circumstances and the distribution relationship between mobile stations, ground stations and satellites cannot be flexibly observed.

Example 1

The execution entity of the satellite communication strength calculation method based on the war chess board proposed in this embodiment is the server.

The present embodiment provides a method for calculating satellite communication strength based on a chessboard. Referring to the flowchart of the communication strength calculation method shown in FIG1 , the communication strength calculation method is applied to a mobile station, where the mobile stations are connected via a satellite communication system. The communication strength calculation method includes:

Step 100: Create a two-dimensional world map, import the two-dimensional world map into the satellite communication system and generate a chessboard.

In the above step 100, the selected two-dimensional plane world map needs to have a large scale, small deformation of length and area during actual measurement, and avoid complex calculation. In particular, the above two-dimensional plane world map can be preferably a two-dimensional plane world map drawn by three-dimensional zone of Gauss-Kruger projection. The two-dimensional plane world map drawn by three-dimensional zone of Gauss-Kruger exists in the chessboard as the chessboard base map.

The three-dimensional zone method needs to be applied when drawing the above two-dimensional world map.

The specific application of the three-degree zone method: 1°30′ east longitude is determined as the initial projection zone, and every 3° is a projection zone. Then the world is divided into 120 projection zones, such as 1°30′ east longitude, 4°30′ east longitude, …, 178°30′ east longitude, 178°30′ west longitude, …, 1°30′ west longitude. There are 60 projection zones in the Eastern Hemisphere and the Western Hemisphere, and the projection zones in the Eastern Hemisphere and the Western Hemisphere are numbered from 1 to 60. Among them, the calculation formula for the central meridian of each projection zone in the Eastern Hemisphere satisfies:

Where _L0 is the central meridian of the Eastern Hemisphere, and n is the projection zone numbered n. Substituting the 60 projection zones of the Eastern Hemisphere into the above calculation formula (1) in turn, we can obtain that all the central meridians of the projection zones of the Eastern Hemisphere are 3°E, 6°E, …, 180°E.

The calculation formula for the central meridian of each projection zone in the Western Hemisphere satisfies:

Wherein, _L1 is the central meridian of the Western Hemisphere, and n is the projection zone numbered n. Substituting the 60 projection zones of the Western Hemisphere into the above calculation formula (2) in turn, the central longitudes and latitudes of all the projection zones of the Western Hemisphere are obtained as 177°W, ..., 3°W, and 0°W.

Step 101: Divide the chessboard into a plurality of chess grids according to longitude and latitude.

Specifically, when dividing the chessboard, the chessboard is divided according to each chess grid corresponding to one degree of longitude and latitude. In particular, the shape of the chess grid is a polygon.

Step 102: Determine the signal strength between the satellite communication system and the mobile station based on the distance distribution between the mobile station and the chess grid.

In the above step 102, the satellite communication system includes: a ground station and a satellite. The mobile station and the ground station can directly exchange signals, and the satellite can only work in a transparent forwarding mode due to the limitation of antenna gain matching between the mobile station and the satellite. At this time, the satellite only plays the role of signal forwarding and cannot directly exchange uplink signals with the mobile station.

Specifically, based on the distance distribution between the mobile station and the chess grid, the signal strength between the satellite communication system and the mobile station is determined to be divided into the following two cases:

(1) When the satellite communication system and the mobile station are located in the same square on the chessboard, the signal strength of the mobile station is determined by the satellite or ground station in the square that is shortest to the mobile station.

(2) When the distances between the satellite and the ground station and the mobile station and the satellite are equal, the signal strength of the mobile station is determined jointly by the satellite and the ground station.

In particular, the mobile station may be in situation (1) in the previous second and may become situation (2) in the next second. Every time the position of the mobile station on the chessboard changes, it is necessary to re-determine the distribution of the mobile station and the surrounding ground stations and satellites. At the same time, the mobile station and the satellite or ground station may not be located in the same chessboard. At this time, the signal strength of the mobile station is determined by the ground station or satellite in the nearest chessboard, and the satellite corresponds to the chessboard through the sub-satellite point coordinates. The sub-satellite point coordinates of the satellite refer to the intersection between the center of the earth and the satellite orbital position connected to the earth's surface. Among them, the satellite orbital position is determined by the six orbital numbers. The method of obtaining the six orbital numbers belongs to the prior art, so it will not be repeated. In particular, when the longitude and latitude difference between the mobile station and the ground station or the mobile station and the satellite does not exceed one longitude and latitude, it can be determined that the two are located in the same chessboard.

Further, referring to the schematic diagram of the mobile station and the ground station being located in the same grid as shown in FIG2 and the schematic diagram of the mobile station and the satellite being located in the same grid as shown in FIG3, for the situation in (1) above, there are two different scenarios in which the mobile station and the ground station and the mobile station and the satellite are located in the same grid:

(1.1) When the mobile station and the ground station of the satellite communication system are located in the same grid, the signal strength of the mobile station satisfies the following formula:

RSS _g = Pg + Gr + Gt - Lc - Lb

Where RSS _g is the signal strength of the mobile station, Pg is the signal transmission power of the ground station, Gr is the receiving antenna gain of the ground station, Gt is the transmitting antenna gain of the ground station, Lc is the line loss, and Lb is the spatial transmission loss;

The spatial transmission loss satisfies:

Lb＝73.4+20*lgF+20*lgD ₁

Where F is the frequency of the mobile station transmitting the signal, and _D1 is the number of grids between the ground station and the mobile station.

(1.2) When the mobile station and the satellite of the satellite communication system are located in the same square, the signal strength of the mobile station satisfies the following formula:

Among them, RSS _s is the signal strength of the mobile station, Ps is the satellite transmit power, Gs is the satellite antenna gain, Gu is the mobile station antenna gain, D ₂ is the number of grids between the satellite's sub-satellite point coordinates and the mobile station, h is the height of the satellite, LA is the atmospheric loss, and λ is the wavelength of the signal.

Furthermore, referring to the schematic diagram of the equal distances between the mobile station and the ground station and between the mobile station and the satellite shown in FIG4 , for the situation in (2) above, the signal strength of the mobile station satisfies the following formula:

RSS＝μ ₁ RSS _g +μ ₂ RSS _S

Among them, RSS is the signal strength of the mobile station when the distances between the ground station and the satellite are equal to the mobile station, _RSSg is the signal strength of the mobile station when the mobile station and the ground station are located in the same square, _RSSs is the signal strength of the mobile station when the mobile station and the satellite are located in the same square, _μ1 is the weight coefficient of the mobile station when the mobile station and the ground station are located in the same square, and _μ2 is the weight coefficient of the mobile station when the mobile station and the satellite are located in the same square.

Furthermore, the position of the mobile station is not fixed. Referring to the flow chart of calculating the signal strength after the mobile station moves as shown in FIG. 5 , when the position of the mobile station changes, the distribution of the ground stations and satellites around the mobile station is first determined, and it is determined whether the mobile station and the ground station or the satellite are located in the same grid, including:

If the mobile station and the satellite or ground station are located in the same square, the signal strength calculation formula involved in the above step (1) is executed to obtain the signal strength of the mobile station;

If the distances between the mobile station and the ground station are equal to the distances between the mobile station and the satellite, the signal strength calculation formula involved in the above step (2) is executed to obtain the signal strength of the mobile station.

In summary, by generating a chessboard of a two-dimensional world map in a satellite communication system and dividing the chessboard into multiple chess grids, the communication strength between different mobile stations and the satellite communication system is determined by using the distance between the mobile station and the chess grids. Compared with the prior art that directly uses complex algorithms, the distance parameters in the traditional calculation method are replaced with chess grids, and the ground station, satellite and chess grids are matched one by one, which makes it easier to intuitively observe the distance between the mobile station and the satellite and ground station, simplifies the size of the data, and thus significantly reduces the complexity of the calculation.

Example 2

A satellite communication strength calculation device based on a chessboard, referring to the structural schematic diagram of the communication strength calculation device shown in FIG6, comprises:

A modeling module 200 is used to establish a two-dimensional world map, import the two-dimensional world map into the satellite communication system and generate a chessboard;

A division module 201 divides the chessboard into a plurality of chess grids according to longitude and latitude;

The determination module 202 determines the signal strength between the satellite communication system and the mobile station according to the distance distribution between the mobile station and the chess grid.

Further, a satellite communication system includes: a ground station and a satellite;

The determining of the signal strength between the satellite communication system and the mobile station based on the distance distribution between the mobile station and the chess grid comprises:

When the satellite communication system and the mobile station are located in the same chess square of the chessboard, the signal strength of the mobile station is determined by the satellite or ground station in the chess square that is shortest to the mobile station;

When the distances between the satellite and the ground station and the mobile station are respectively equal, the signal strength of the mobile station is jointly determined by the satellite and the ground station.

In summary, by generating a chessboard of a two-dimensional world map in a satellite communication system and dividing the chessboard into multiple chess grids, the communication strength between different mobile stations and the satellite communication system is determined by using the distance between the mobile station and the chess grids. Compared with the prior art that directly uses complex algorithms, the distance parameters in the traditional calculation method are replaced with chess grids, and the ground station, satellite and chess grids are matched one by one, which makes it easier to intuitively observe the distance between the mobile station and the satellite and ground station, simplifies the size of the data, and thus significantly reduces the complexity of the calculation.

Example 3

This embodiment proposes 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 satellite communication strength calculation method based on a chessboard described in the above embodiment 1 are executed. The specific implementation can be found in method embodiment 1, which will not be described in detail here.

In addition, referring to the structural diagram of an electronic device shown in FIG. 7 , this embodiment further proposes an electronic device, which includes a bus 301 , a processor 302 , a transceiver 303 , a bus interface 304 , a memory 305 and a user interface 306 .

In this embodiment, the electronic device further includes: one or more programs stored in the memory 305 and executable on the processor 302, and configured to be executed by the processor to perform the following steps (1) to (3):

(1) establishing a two-dimensional world map, importing the two-dimensional world map into the satellite communication system and generating a chessboard;

(2) dividing the chessboard into a plurality of chess grids according to longitude and latitude;

(3) Determine the signal strength between the satellite communication system and the mobile station based on the distance distribution between the mobile station and the chess grid.

The transceiver 303 is used to receive and send data under the control of the processor 302 .

Among them, the bus architecture (represented by bus 301), bus 301 can include any number of interconnected buses and bridges, and bus 301 links various circuits including one or more processors represented by processor 302 and memory represented by memory 305. Bus 301 can also link various other circuits such as peripherals, voltage regulators, and power management circuits together, which are all well known in the art, so this embodiment will not be further described. Bus interface 304 provides an interface between bus 301 and transceiver 303. Transceiver 303 can be one element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on a transmission medium. For example: transceiver 303 receives external data from other devices. Transceiver 303 is used to send data processed by processor 302 to other devices. Depending on the nature of the computing system, a user interface 306, such as a keypad, display, speaker, microphone, joystick, can also be provided.

The processor 302 is responsible for managing the bus 301 and general processing, such as running the general operating system 3051 as mentioned above. The memory 305 can be used to store data used by the processor 302 when performing operations.

Optionally, the processor 302 may be, but is not limited to: a central processing unit, a single-chip microcomputer, a microprocessor or a programmable logic device.

It can be understood that the memory 305 in the embodiment of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM) and direct RAM bus random access memory (DRRAM). The memory 55 of the system and method described in the present embodiment is intended to include, but is not limited to, these and any other suitable types of memory.

In some implementations, the memory 305 stores the following elements, executable modules or data structures, or a subset thereof, or an extended set thereof: an operating system 3051 and an application program 3052 .

Among them, the operating system 3051 includes various system programs, such as a framework layer, a core library layer, a driver layer, etc., which are used to implement various basic services and process hardware-based tasks. The application 3052 includes various application programs, such as a media player (Media Player), a browser (Browser), etc., which are used to implement various application services. The program for implementing the method of the embodiment of the present application can be included in the application 3052.

The above is only a specific implementation of the embodiment of the present invention, but the protection scope of the embodiment of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the embodiment of the present invention, which should be included in the protection scope of the embodiment of the present invention. Therefore, the protection scope of the embodiment of the present invention shall be based on the protection scope of the claims.

Claims (2)

1. A method for calculating satellite communication intensity based on a chess board, the method being applied to mobile stations connected by a satellite communication system, the method comprising:

Establishing a two-dimensional planar world map, importing the two-dimensional planar world map into the satellite communication system and generating a chessboard;

dividing the chessboard into a plurality of chessboards according to longitude and latitude;

Determining a signal strength between the satellite communication system and the mobile station based on a distance distribution between the mobile station and the checkers;

Wherein, the satellite communication system includes: ground stations and satellites;

the determining signal strength between the satellite communication system and the mobile station based on the distance distribution between the mobile station and the checkers comprises:

When the satellite communication system and the mobile station are positioned in the same chess grid in the chessboard, the signal intensity of the mobile station is determined by the satellite or the ground station with the shortest distance from the mobile station in the chess grid;

when the satellite and the ground station are equal in distance to each other, the signal strength of the mobile station is determined by the satellite and the ground station;

wherein when the satellite communication system and the mobile station are located in the same chess grid in the chessboard, the signal strength of the mobile station is determined by the satellite or ground station with the shortest distance from the mobile station in the chess grid, and the method comprises the following steps:

When the mobile station and the ground station of the satellite communication system are located in the same chess grid, the signal strength of the mobile station meets the following formula:

RSS_g＝Pg+Gr+Gt-Lc-Lb

wherein RSS _g is the signal strength of the mobile station, pg is the signal transmitting power of the ground station, gr is the gain of the receiving antenna of the ground station, gt is the gain of the transmitting antenna of the ground station, lc is the line loss, and Lb is the space transmission loss;

The space transmission loss satisfies:

Lb＝73.4+20*lgF+20*lgD₁

Wherein F is the frequency of the signal transmitted by the mobile station, and D ₁ is the number of grids between the ground station and the mobile station;

wherein when the satellite communication system and the mobile station are located in the same chess grid in the chessboard, the signal strength of the mobile station is determined by the satellite or ground station with the shortest distance from the mobile station in the chess grid, and the method further comprises the following steps:

when the mobile station and the satellite of the satellite communication system are located in the same chess grid, the signal strength of the mobile station meets the following formula:

Wherein RSS _s is the signal strength of the mobile station, ps is the satellite transmitting power, gs is the satellite antenna gain, gu is the mobile station antenna gain, D ₂ is the number of grids of the chess grid between the coordinates of the satellite's points and the mobile station, h is the satellite's height, LA is the atmospheric loss, and λ is the wavelength of the signal;

Wherein the signal strength of the mobile station is determined jointly by the satellite and the ground station when the distances between the satellite and the ground station, respectively, are equal to the mobile station, comprising:

the mobile station signal strength satisfies the following equation:

RSS＝μ₁RSS_g+μ₂RSS_S

Wherein, RSS is the signal strength of the mobile station when the ground station and the satellite are at the same distance from the mobile station, RSS _g is the signal strength of the mobile station when the mobile station and the ground station are at the same chess grid, RSS _S is the signal strength of the mobile station when the mobile station and the satellite are at the same chess grid, mu ₁ is the weight coefficient of the mobile station when the mobile station and the ground station are at the same chess grid, mu ₂ is the weight coefficient of the mobile station when the mobile station and the satellite are at the same chess grid.

2. The method for calculating the satellite communication intensity based on the chess board according to claim 1, wherein the steps of creating a two-dimensional planar world map, importing the two-dimensional planar world map into the satellite communication system and generating the chess board include:

And drawing a two-dimensional planar world map by using a Gauss-Gauss projection three-degree banding method.