CN108540208A - A kind of onboard system of laser beam communications satellite - Google Patents
A kind of onboard system of laser beam communications satellite Download PDFInfo
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- CN108540208A CN108540208A CN201810362859.5A CN201810362859A CN108540208A CN 108540208 A CN108540208 A CN 108540208A CN 201810362859 A CN201810362859 A CN 201810362859A CN 108540208 A CN108540208 A CN 108540208A
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- satellite
- laser communication
- ground
- laser
- communication terminals
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- 230000002457 bidirectional effect Effects 0.000 claims description 5
- 229910003460 diamond Inorganic materials 0.000 claims description 5
- 239000010432 diamond Substances 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 239000011159 matrix material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18515—Transmission equipment in satellites or space-based relays
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/118—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum specially adapted for satellite communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/27—Arrangements for networking
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18519—Operations control, administration or maintenance
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18521—Systems of inter linked satellites, i.e. inter satellite service
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Aviation & Aerospace Engineering (AREA)
- Electromagnetism (AREA)
- Computing Systems (AREA)
- Radio Relay Systems (AREA)
Abstract
The invention discloses a kind of onboard systems of laser beam communications satellite, are related to technical field of laser communication, and main purpose is to realize that one satellite of synchronization provides service for multiple laser communication terminals under lower cost.The onboard system of laser beam communications satellite of the present invention includes:Laser communication terminal and electric cabinet；The electric cabinet is used for the power supply of laser communication terminal, provides control instruction and information flow；The laser communication terminal includes at least two Space laser communications terminals and multiple satellite-ground laser communication terminals；At least two Space laser communications terminal is used to carry out laser two-way communication with other satellites；The multiple satellite-ground laser communication terminal with the earth station of corresponding number, aircraft for carrying out two-way laser communication simultaneously；Wherein, the subtended angle over the ground of satellite where each satellite-ground laser communication terminal can scan it.Present invention is mainly used for the data transmissions of aircraft.
Description
Technical Field
The invention relates to the technical field of laser communication, in particular to a satellite-borne system of a laser communication satellite.
Background
Currently, airborne communication is mainly achieved by microwave satellites. In the case of communication by microwave radio, since radio frequency is a base for normal communication between an aircraft and a satellite and is a channel for information transmission, in order to prevent electromagnetic interference between satellites, it is necessary to maintain a certain interval of communication frequency for frequency isolation, and thus the radio spectrum is strictly regulated by the International Telecommunications Union (ITU) and governments of various countries. In addition, radio communication has the problems of frequency spectrum saturation and limited communication bandwidth, and is difficult to meet the high-speed transmission requirement of mass data, and real-time transmission of mass flight data (10 GB/s magnitude of a single aircraft) of the aircraft cannot be realized.
Therefore, communication systems using laser communication links for satellite and ground station communication have appeared today, although space laser communication has significant advantages, such as high data transmission rate, high capacity and high security. However, the divergence angle of the laser beam is narrow, and generally, one laser beam can only communicate with one other laser communication terminal; at present, one laser communication terminal is generally arranged in one satellite, and the satellite can only serve a plurality of laser communication terminals at the same time by transmitting a plurality of satellites, so that the cost is extremely high.
Disclosure of Invention
The invention provides a satellite-borne system for a laser communication satellite, and mainly aims to provide service for a plurality of laser communication terminals by one satellite at the same time at low cost.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a satellite-borne system of a laser communication satellite, comprising:
the system comprises a laser communication terminal and an electric cabinet;
the electric cabinet is used for supplying power to the laser communication terminal and providing a control instruction and an information flow;
the laser communication terminal comprises at least two inter-satellite laser communication terminals and a plurality of satellite-ground laser communication terminals;
the at least two inter-satellite laser communication terminals are used for carrying out laser two-way communication with other satellites;
the plurality of satellite-ground laser communication terminals are used for carrying out bidirectional laser communication with a corresponding number of ground stations and/or aircrafts at the same time;
each satellite-ground laser communication terminal can scan the field angle to the ground of the satellite where the satellite is located.
Furthermore, the size of the satellite ground flare angle is a cone angle A, the scanning range of the satellite ground laser communication terminal is a cone angle B, and B is larger than or equal to A.
Further, the scanning ranges of the plurality of satellite-ground laser communication terminals are the same or different in size.
Furthermore, the plurality of satellite-ground laser communication terminals are randomly arranged in the satellite where the satellite-ground laser communication terminals are located.
Further, the plurality of satellite-to-ground laser communication terminals are arranged in a predetermined communication array in the satellite where the plurality of satellite-to-ground laser communication terminals are located.
Further, the predetermined communication array is arranged in a matrix shape of n × n, n being a natural number greater than 2;
or,
the predetermined communication array is a circular array, a square array or a diamond array.
Further, the plurality of satellite-ground laser communication terminals are mounted on a mounting surface on a satellite.
Further, the mounting surface is a plane.
Further, the inter-satellite laser communication terminal is used for performing laser communication connection with a satellite in the same orbital plane of the satellite, and/or is used for performing laser communication connection with a satellite in another orbital plane.
Compared with the prior art, the satellite-borne system of the laser communication satellite provided by the invention is provided with the plurality of satellite-ground laser communication terminals, and the plurality of satellite-ground laser communication terminals are used for carrying out bidirectional laser communication with the corresponding number of ground stations and aircrafts at the same time, so that one satellite can serve the plurality of laser communication terminals at the same time, and the service cost of the laser communication terminals is greatly reduced. In addition, each satellite-ground laser communication terminal can scan the field angle of the satellite where the satellite is located, so that the flexibility of the use of a plurality of laser communication terminals is better, and the ground station and the aircraft can better capture the laser communication terminals.
Drawings
FIG. 1 is a schematic diagram of a satellite-based system of a laser communication system satellite according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a satellite ground flare angle according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a communication array arrangement predetermined by a plurality of satellite-ground laser communication terminals according to an embodiment of the present invention;
fig. 4 is a schematic diagram of another communication array arrangement predetermined by a plurality of satellite-ground laser communication terminals according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1, the satellite-borne system of the laser communication satellite includes an electric cabinet 10 and a laser communication terminal 20. The electric cabinet 10 is used for supplying power to the laser communication terminal and providing measurement and control instructions and information flow. Laser communication terminal 20 the laser communication terminal includes two types, one is an inter-satellite laser communication terminal 201, and the other is a satellite-ground laser communication terminal 202.
At least two inter-satellite laser communication terminals 201 are used for communicating with inter-satellite laser communication terminals on other satellites so as to realize inter-satellite laser communication. For example, satellites located on the same orbital plane may be connected in sequence through inter-satellite laser communication terminals to form a satellite communication network, or satellites located on different orbital planes may be connected through inter-satellite laser communication terminals to form a mesh satellite communication network.
The plurality of satellite-to-ground laser communication terminals 202 are used for simultaneously communicating with a corresponding number of laser communication terminals on aircraft and ground station systems in the satellite coverage area. Each satellite-ground laser communication terminal can scan the field angle to the ground of the satellite where the satellite is located.
It should be noted that, each satellite-ground laser communication terminal performs laser link communication with one aircraft or ground station during communication, and therefore, the number of the satellite-ground laser communication terminals determines the number of the aircraft and the ground station performing laser link communication in a unified time period of the satellite, that is, the number of the laser communication terminals capable of performing laser link communication simultaneously.
The angular range of the earth that each satellite can cover is related to the distance between the satellite and the earth and the number of satellites in the orbit outside the earth, and the range that each satellite-ground laser communication terminal can scan should be greater than or equal to the range of the earth that the satellite can cover.
Based on the above description, after the satellites on the same orbital plane are sequentially connected through the inter-satellite laser communication terminals to form a satellite communication network, as long as the inter-satellite laser communication terminal on one of the satellites communicates with the laser communication terminal on the ground station system, the two-way communication between the satellites and the ground stations on the entire orbital plane can be realized. And all the satellites on the orbital plane can communicate with the laser communication terminals in the aircraft through the satellite-ground laser communication terminals, so that the network service is provided for the aircraft provided with the aircraft, and the mass data of the aircraft are downloaded to the ground station through the network.
In the embodiment of the invention, the satellite-borne system of the laser communication satellite is provided with a plurality of satellite-ground laser communication terminals, and the plurality of satellite-ground laser communication terminals are used for carrying out bidirectional laser communication with a corresponding number of ground stations and aircrafts at the same time, so that one satellite can serve the plurality of laser communication terminals at the same time, and the service cost of the laser communication terminals is greatly reduced. In addition, each satellite-ground laser communication terminal can scan the field angle of the satellite where the satellite is located, so that the flexibility of the use of a plurality of laser communication terminals is better, and the ground station and the aircraft can better capture the laser communication terminals.
Further, the number of satellites in the satellite orbit outside the earth is n, and the n satellites surround the earth in one circle and cover the range of the one circle. As shown in fig. 2. For example, the radius of the orbit plane is r, the distance from the earth is h, h can be 1000km to 5000km, the number of satellites is n, the size of each satellite ground aperture angle is a cone angle A, and the satellite ground aperture angle is a symmetrical cone angle taking the connecting line of the satellite and the earth center as an axis. In order to minimize the number of satellites provided on each orbital plane, i.e., maximize the opening angle to the earth of each satellite, the outermost side of the opening angle to the earth of the satellite is tangent to the earth surface, i.e., a is 2arccos (r/r + h). For example, when the orbit of the satellite is 1000km from the earth, the opening angle of the satellite to the ground station is 120 degrees.
The satellite-ground laser communication terminals on each satellite are provided with a plurality of satellite-ground laser communication terminals, the larger the scanning range of the satellite-ground laser communication terminals is, the larger the scanning angle of the satellite-ground laser communication terminals is, the larger the scanning range of the satellite-ground laser communication terminals is, the satellite-ground laser communication terminals can provide service for aircrafts with longer line spacing, and the size of the scanning range of the satellite-ground laser communication terminals on the satellite within the range of the ground flare angle A of the satellite is the cone angle B, and B is larger than or equal to A. The sizes of the scanning ranges, i.e., cone angles, of the plurality of satellite-to-ground laser communication terminals may be the same or different, as long as each scanning range can cover the scanning range of the satellite to the ground.
Furthermore, since the taper angle B of the satellite-ground laser communication terminal provided in the embodiment of the present invention is not less than a, and each satellite-ground laser communication terminal can independently complete coverage of the satellite-ground scanning range, when a plurality of satellite-ground laser communication terminals are arranged in a satellite, the arrangement may be performed in any manner, for example, the predetermined communication array may be an n × n matrix arrangement, n is a natural number greater than 2, and may be a non-array, which is not limited in this specific embodiment of the present invention.
In order to place a relatively large number of satellite-ground laser communication terminals in a limited space of a satellite, in an embodiment of the present invention, it is preferable to arrange a plurality of laser communication terminals according to a predetermined communication array, specifically, as shown in fig. 3, a plurality of laser communication terminals are arranged in an N × N matrix shape, for example, N is 7, and the plurality of satellite-ground laser communication terminals are distributed at equal intervals.
It should be noted that, when a plurality of satellite-to-earth satellite communication terminals are arranged at intervals, the satellite-to-earth satellite communication terminals may be distributed at unequal intervals in addition to the equal interval distribution described above, and specifically, the embodiment of the present invention is not limited to this, as long as the distance between the satellite-to-earth satellite communication terminals does not affect the actual scanning range.
In addition, it should be noted that, as described above, each of the satellite-ground laser communication terminals in the embodiment of the present invention may implement full coverage of the ground scanning range of the satellite where the satellite is located, when the plurality of satellite-ground laser communication terminals are laid out, the satellite-ground laser communication terminals are not necessarily arranged in a matrix shape, but may be arranged in a circle, a square, a diamond, or another shape, and the spacing distances between the plurality of satellite-ground laser communication terminals may be the same or different, and may be arranged according to a certain rule or may be arranged in a non-ordered manner, which is not limited in this embodiment of the present invention. As shown in fig. 4, the laser communication terminals within the diamond are arranged at unequal intervals as an example. Namely, the satellite-ground laser communication terminals are arranged on the satellite according to a predetermined communication array, and the predetermined communication array can be a circular array, a square array or a diamond array, or a matrix array.
The plurality of satellite-to-ground laser communication terminals may be provided on one installation surface of the satellite, and the installation surface may be a plane, a spherical convex surface, or a spherical concave surface, and the installation surface is provided on the side of the satellite facing the earth.
In the embodiment of the invention, the satellite-borne system of the laser communication satellite is provided with a plurality of satellite-ground laser communication terminals, and the plurality of satellite-ground laser communication terminals are used for carrying out bidirectional laser communication with a corresponding number of ground stations and aircrafts at the same time, so that one satellite can serve the plurality of laser communication terminals at the same time, and the service cost of the laser communication terminals is greatly reduced. In addition, each satellite-ground laser communication terminal can scan the field angle of the satellite where the satellite is located, so that the flexibility of the use of a plurality of laser communication terminals is better, and the ground station and the aircraft can better capture the laser communication terminals.
The embodiment of the invention can realize the communication among the satellite, the aircraft and the ground station by adopting the laser communication link, replaces the conventional microwave communication between the satellite and the aircraft, and avoids the difficult problem of radio frequency spectrum control. In addition, the laser communication has high transmission rate (over 1Gbps), large bandwidth and large information capacity, and is favorable for meeting the requirement of mass data transmission of aircrafts, particularly civil airliners.
Although preferred embodiments of the present invention have been described in detail hereinabove, it should be clearly understood that modifications and variations of the present invention are possible to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A satellite-borne system of a laser communication satellite, comprising:
the system comprises a laser communication terminal and an electric cabinet;
the electric cabinet is used for supplying power to the laser communication terminal and providing a control instruction and an information flow;
the laser communication terminal comprises at least two inter-satellite laser communication terminals and a plurality of satellite-ground laser communication terminals;
the at least two inter-satellite laser communication terminals are used for carrying out laser two-way communication with other satellites;
the plurality of satellite-ground laser communication terminals are used for carrying out bidirectional laser communication with a corresponding number of ground stations and/or aircrafts at the same time;
each satellite-ground laser communication terminal can scan the field angle to the ground of the satellite where the satellite is located.
2. The system of claim 1, wherein the satellite field angle is a cone angle A, and the scanning range of the satellite-ground laser communication terminal is a cone angle B, wherein B ≧ A.
3. The satellite-borne system of the laser communication satellite according to claim 2, wherein the scanning ranges of the plurality of satellite-to-ground laser communication terminals are the same or different in size.
4. The system of claim 2, wherein the plurality of laser communication terminals are randomly arranged within the satellite.
5. The system of claim 2, wherein the plurality of laser communication terminals are arranged in a predetermined communication array within the satellite.
6. The satellite-borne system of laser communication satellites according to claim 5, wherein the predetermined communication array is an n x n matrix-shaped arrangement, n being a natural number greater than 2;
alternatively, the predetermined communication array is a circular array, a square array or a diamond array.
7. The on-board system of a laser communication satellite of claim 5,
the plurality of satellite-ground laser communication terminals are distributed at equal intervals or at unequal intervals.
8. The system of any of claims 1-7, wherein the plurality of laser communication terminals are mounted on a mounting surface on the satellite.
9. The satellite-based system of claim 6, wherein the mounting surface is a flat surface.
10. The system of claim 9, wherein the inter-satellite laser communication terminal is configured to connect to a satellite in the same orbital plane as the satellite and/or to connect to a satellite in another orbital plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810362859.5A CN108540208A (en) | 2018-04-20 | 2018-04-20 | A kind of onboard system of laser beam communications satellite |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810362859.5A CN108540208A (en) | 2018-04-20 | 2018-04-20 | A kind of onboard system of laser beam communications satellite |
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| CN108540208A true CN108540208A (en) | 2018-09-14 |
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| CN201810362859.5A Pending CN108540208A (en) | 2018-04-20 | 2018-04-20 | A kind of onboard system of laser beam communications satellite |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113572529A (en) * | 2021-06-18 | 2021-10-29 | 北京极光星通科技有限公司 | Satellite-borne laser communication terminal software reconstruction method and system |
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2018
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Patent Citations (7)
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| CN1825787A (en) * | 2006-04-03 | 2006-08-30 | 哈尔滨工业大学 | Method for establishing laser link between low orbit safellite and ground station |
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| CN113572529A (en) * | 2021-06-18 | 2021-10-29 | 北京极光星通科技有限公司 | Satellite-borne laser communication terminal software reconstruction method and system |
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