CN109672471B - Space-based information distribution system and distribution method - Google Patents
Space-based information distribution system and distribution method Download PDFInfo
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- CN109672471B CN109672471B CN201910136721.8A CN201910136721A CN109672471B CN 109672471 B CN109672471 B CN 109672471B CN 201910136721 A CN201910136721 A CN 201910136721A CN 109672471 B CN109672471 B CN 109672471B
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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
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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
- H04B7/18517—Transmission equipment in earth stations
Abstract
The invention discloses a space-based information distribution system and a distribution method. The system comprises a mobile transceiver terminal and a space-based distribution terminal, wherein the mobile transceiver terminal comprises a track calculation module, a task generation module and a wireless transceiver module, the space-based distribution terminal comprises a space-based receiving module, a comprehensive processing module and a space-based transmitting module, the mobile transceiver terminal is installed on a user, the space-based distribution terminal is installed on a space-based platform, and the mobile transceiver terminal and the space-based distribution terminal are connected in a wireless connection mode and carry out information exchange. The space-based information distribution system and the distribution method can directly distribute the space-based information of the space-based platform to the users, save the transfer link of the ground station, can avoid the problem that the users cannot receive the space-based information because the ground station is damaged, have higher timeliness and safety, can realize the information distribution of the users in all visible ranges, and solve the problem that the remote areas and the mobile users cannot receive the space-based information.
Description
Technical Field
The invention relates to the technical field of spaceflight, in particular to a space-based information distribution system and a space-based information distribution method.
Background
The space-based information network is a comprehensive space navigation information system consisting of a plurality of spacecrafts with different functions, satellite networks or satellite constellations, and comprises a plurality of effective loads such as remote sensors, positioners and repeaters, a space-based platform and the like. The existing space-based platform is wide in coverage range, optical imaging, microwave imaging, signal reconnaissance, Synthetic Aperture Radar (SAR) and other earth observation loads are carried on the space-based platform, rapid wide-area information acquisition can be achieved, the space-based platform is not limited by national soil and territorial territory of territory, and the acquired data can provide information service and decision support for important fields such as agriculture, disaster prevention and reduction, resource environment, public safety and the like, and also has important operational information value, the space-based information can provide more comprehensive service for national economic construction, social development and national safety, and the space-based platform is efficient and reliable in space-based information distribution capability and is an important ring for playing the observation role of the space-based platform.
At present, the space-based platform distributes the acquired information to users and transmits the information through a ground station, and the specific method comprises the following steps: the method comprises the following steps of obtaining target observation data by using space-based platform optical imaging, microwave imaging, signal reconnaissance, SAR and other earth observation loads, and storing the data in a data storage unit; when the space-based platform is emptied by the ground station, a downlink data transmission channel is established with the ground station, and the data stored in the data storage unit is downloaded to the ground station through the downlink data transmission channel; and the ground station distributes the received space-based information to different levels of users through a ground network.
The inventor finds that the prior art has at least the following problems:
the space-based platform and the ground station establish a single data transmission channel, and when the ground station breaks down or is artificially destroyed in wartime, space-based information cannot be distributed to users, so that a large single-point failure safety risk exists; the ground station firstly receives space-based information and then distributes the space-based information to the users, the number of links between an information source and the users is large, the transmission link path is long, and the transmission real-time performance is poor; for the remote land, island, ocean and other areas and the partial mobile users such as airplanes, ships and warships, the ground station and the ground network are difficult to be covered completely.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a space-based information distribution system and a distribution method, which realize that a space-based platform directly distributes space-based information to regional users by utilizing a phased array antenna with the agile beam size and beam direction.
Therefore, the invention discloses a space-based information distribution system. The system comprises: the mobile terminal is installed on a user, the space-based distribution terminal is installed on a space-based platform, and the mobile terminal is connected with the space-based distribution terminal in a wireless connection mode;
the mobile transceiver terminal includes: the system comprises a track calculation module, a task generation module and a wireless transceiving module which are connected with each other; the track calculation module calculates the positions of the space-based platform at different moments and sends position information to the task generation module and the wireless transceiving module; the task generation module generates distribution information comprising distribution content, distribution time, distribution position and distribution range according to user requirements, and sends the distribution information to the wireless transceiver module; the wireless transceiver module is used for carrying out signal transmission with the space-based platform;
the space-based distribution terminal includes: the antenna comprises an antenna base receiving module, a comprehensive processing module and an antenna base transmitting module which are sequentially connected, wherein the antenna base transmitting module comprises a modulating unit and a phased array antenna unit which are mutually connected; the space-based receiving module is wirelessly connected with the wireless transceiving module and is used for receiving and demodulating a wireless signal corresponding to the distribution information sent by the wireless transceiving module and sending the demodulated information to the comprehensive processing module; the comprehensive processing module calculates the transmitting direction of the space-based transmitting module according to the demodulation information, calculates the number of working array elements of the phased array antenna unit, reads the space-based information of a data storage unit in the space-based platform, and sends the transmitting direction information, the number information of the working array elements and the space-based information to the space-based transmitting module; the phased array antenna unit adjusts the antenna direction and the working array elements according to the transmitting azimuth information and the working array element quantity information, and sends the modulated antenna base information to the wireless transceiving module.
Furthermore, in the space-based information distribution system, the comprehensive processing module comprises a pointing calculation unit, an array element calculation unit and an information cache unit;
the direction calculation unit is connected with a navigation receiver unit of the space-based platform, reads the position information of the space-based platform in the navigation receiver unit, and calculates the direction of the antenna of the space-based transmitting module according to the position information of the space-based platform and the distribution position and distribution time information in the demodulation information;
the array element calculating unit calculates the beam size and the number of working array elements of the phased array antenna unit according to the distribution range information in the demodulation information;
the information caching unit is connected with the data storage unit and reads the space-based information corresponding to the distribution content in the data storage unit according to the distribution content in the demodulation information.
Further, in the space-based information distribution system, the integrated processing module is respectively connected to the navigation receiver unit, the space-based receiving module, the space-based transmitting module and the data storage unit of the space-based platform through transmission cables.
Further, in the space-based information distribution system, the azimuth pointing direction of the antenna of the space-based transmission module includes: a relative azimuth and a relative pitch of the space based platform to the user at the time of the distribution.
Further, in the space-based information distribution system, the coordinates of the space-based platform at the distribution time are set to be (Xs, Ys, Zs), the coordinates of the user at the distribution time are set to be (Xa, Ya, Za), and the relative azimuth angle α and the relative pitch angle β are calculated and obtained through the following formula 1;
further, in the space-based information distribution system, the phased array antenna unit includes 16 sixteen array element units, and 16 of the sixteen array element units adopt a combined working mode.
Further, in the space-based information distribution system, in the phased array antenna unit, the number N of working array elements and the antenna beam width θBWSatisfies the following formula 2:
wherein k is a beam width factor and β is the relative elevation angle.
Further, in the space-based information distribution system, the space-based receiving module adopts an omnidirectional receiving antenna to the ground.
Further, in the space-based information distribution system, the orbit calculation module calculates the positions of the space-based platform at different times according to the orbit parameters of the satellite.
In addition, the invention also provides a space-based information distribution method implemented by using the space-based information distribution system.
The method comprises the following steps:
the track calculation module calculates the positions of the space-based platform at different moments according to the motion parameters of the space-based platform and sends position information to the task generation module and the wireless transceiving module;
the task generating module generates distribution information comprising distribution content, distribution time, distribution position and distribution range according to user requirements and the position information, and sends the distribution information to the wireless transceiving module;
the wireless transceiver module transmits the distribution information to the space-based platform through a wireless signal;
the space-based receiving module in the space-based platform receives and demodulates the wireless signals sent by the wireless transceiving module, acquires the distribution information corresponding to the wireless signals, and sends the distribution information to the comprehensive processing module;
the comprehensive processing module calculates the transmitting direction of the space-based transmitting module according to the distributing position in the distributing information and the position of the space-based platform corresponding to the distributing time, calculates the number of working array elements of the phased-array antenna unit according to the distributing range in the distributing information, reads the space-based information of the data storage unit in the space-based platform according to the distributing content of the distributing information, and transmits the transmitting direction information, the number information of the working array elements and the space-based information to the space-based transmitting module;
the phased array antenna unit of the antenna-based transmitting module adjusts the direction pointing of the antenna and the number of the working array elements of the phased array antenna unit according to the transmitting azimuth information and the number information of the working array elements, the modulating unit of the antenna-based transmitting module modulates the antenna-based information and sends the modulated information to the phased array antenna unit, and the phased array antenna unit sends the modulated information to the wireless transceiving module through a space signal.
The technical scheme of the invention has the following main advantages:
the space-based information distribution system and the distribution method can directly distribute the space-based information of the space-based platform to users, saves a ground station transfer link, and has higher timeliness; the space-based platform is directly connected with the user, so that the problem that the user cannot receive the space-based information due to the fact that the ground station is damaged can be avoided, and the safety is high; by adjusting the phased array antenna unit of the space-based transmitting module, the transmitting area of the space-based transmitting module can be adjusted, information distribution of users in all under-satellite visual ranges is realized, and the problem that the space-based information cannot be received in remote land, islands, oceans and other areas and mobile users such as airplanes and ships can be effectively solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a space-based information distribution system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a mobile transceiver terminal in the space-based information distribution system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a space-based distribution terminal in the space-based information distribution system according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating the operation of a space-based receiving module in the space-based information distribution system according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an integrated processing module in the space-based information distribution system according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a phased array antenna unit in the space-based information distribution system according to an embodiment of the present invention.
The system comprises a 1-mobile transceiver terminal, a 101-orbit calculation module, a 102-task generation module, a 103-wireless transceiver module, a 2-space-based distribution terminal, a 201-space-based receiving module, a 202-comprehensive processing module, a 2021-pointing calculation unit, a 2022-array element calculation unit, a 2023-information caching unit, a 203-space-based transmitting module, a T1-data storage unit, a T2-navigation receiver unit and a Y-user.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The technical scheme provided by the embodiment of the invention is described in detail below with reference to the accompanying drawings.
As shown in the drawings, an embodiment of the present invention provides a space-based information distribution system, including: the system comprises a mobile transceiver terminal 1 and a space-based distribution terminal 2, wherein the mobile transceiver terminal 1 is installed on a user Y, the space-based distribution terminal 2 is installed on a space-based platform, and the mobile transceiver terminal 1 and the space-based distribution terminal 2 are connected in a wireless connection mode;
the mobile transceiver terminal 1 comprises: the system comprises a track calculation module 101, a task generation module 102 and a wireless transceiving module 103 which are connected with each other; the track calculation module 101 calculates the positions of the space-based platform at different times, and sends position information to the task generation module 102 and the wireless transceiving module 103; the task generating module 102 generates distribution information including distribution content, distribution time, distribution position and distribution range according to the requirement of the user Y, and sends the distribution information to the wireless transceiving module 103; the wireless transceiver module 103 is used for carrying out signal transmission with the space-based platform;
the space-based distribution terminal 2 includes: the antenna comprises an antenna base receiving module 201, a comprehensive processing module 202 and an antenna base transmitting module 203 which are connected in sequence, wherein the antenna base transmitting module 203 comprises a modulating unit and a phased array antenna unit which are connected with each other; the space-based receiving module 201 is wirelessly connected with the wireless transceiving module 103, and is configured to receive and demodulate a wireless signal corresponding to the distribution information sent by the wireless transceiving module 103, and send the demodulated information to the comprehensive processing module 202; the comprehensive processing module 202 calculates the transmitting direction of the space-based transmitting module 203 according to the demodulation information, calculates the number of working array elements of the phased array antenna unit, reads the space-based information of a data storage unit T1 in the space-based platform, and sends the transmitting direction information, the number information of the working array elements and the space-based information to the space-based transmitting module 203; the modulation unit is used for modulating the space-based information, and the phased array antenna unit adjusts the antenna pointing direction and the working array elements according to the transmitting direction information and the working array element number information, and sends the modulated space-based information to the wireless transceiving module 103.
The following specifically describes a working method and a principle of the space-based information distribution system provided by the embodiment of the present invention.
When the space-based information distribution system provided by the embodiment of the invention is used, the track calculation module 101 calculates the positions of the space-based platform at different moments according to the motion parameters of the space-based platform, and sends the position information to the task generation module 102 and the wireless transceiver module 103; the task generating module 102 generates distribution information including distribution content, distribution time, distribution location, and distribution range according to the demand and location information of the user Y, and transmits the distribution information to the wireless transceiving module 103; the wireless transceiver module 103 receives the distribution information, converts the distribution information into a wireless signal and transmits the wireless signal to the space-based platform; a space-based receiving module 201 in the space-based platform receives and demodulates the wireless signal sent by the wireless transceiving module 103, acquires distribution information corresponding to the wireless signal, and sends the distribution information to a comprehensive processing module 202; the comprehensive processing module 202 is responsible for planning and scheduling distribution tasks, the comprehensive processing module 202 calculates the transmitting direction of the antenna in the space-based transmitting module 203 according to the distribution position in the distribution information and the position of the space-based platform corresponding to the distribution time in the distribution information, calculates the number of working array elements of the phased array antenna unit of the space-based transmitting module 203 according to the distribution range in the distribution information, reads the space-based information of the data storage unit T1 in the space-based platform according to the distribution content of the distribution information, and transmits the transmitting direction information, the number information of the working array elements and the space-based information to the space-based transmitting module 203; the phased array antenna unit of the space-based transmitting module 203 adjusts the direction pointing of the antenna and the number of the working array elements of the phased array antenna unit according to the transmitting azimuth information and the number information of the working array elements, the modulating unit of the space-based transmitting module 203 modulates the space-based information and sends the modulated information to the phased array antenna unit, and the phased array antenna unit converts the modulated information into a space signal and sends the space signal to the wireless transceiver module 103 for the user Y to use.
Therefore, the space-based information distribution system provided by the embodiment of the invention can directly distribute the space-based information of the space-based platform to the user Y, saves a ground station transfer link, and has higher timeliness; the space-based platform is directly connected with the user Y, so that the problem that the user Y cannot receive the space-based information due to the fact that the ground station is damaged can be avoided, and the safety is high; by adjusting the phased array antenna unit of the space-based transmitting module 203, the transmitting area of the space-based transmitting module 203 can be adjusted, information distribution of users Y in all under-satellite visible ranges is realized, and the problem that the space-based information cannot be received in areas such as remote land, islands, oceans and the like and mobile users Y such as airplanes and ships can be effectively solved.
In the embodiment of the present invention, the comprehensive processing module 202 may include a pointing computing unit 2021, an array element computing unit 2022, and an information caching unit 2023; the direction calculation unit 2021 is connected to the navigation receiver unit T2 of the space-based platform, and the direction calculation unit 2021 reads the position information of the space-based platform in the navigation receiver unit T2 and calculates the directional direction of the antenna of the space-based transmission module 203 according to the position information of the space-based platform and the distribution position and distribution time information in the demodulation information; the array element calculation unit 2022 calculates the beam size and the number of working array elements of the phased array antenna unit according to the distribution range information in the demodulation information; the information buffer unit 2023 is connected to the data storage unit T1, and the information buffer unit 2023 reads the day-based information corresponding to the distribution content in the data storage unit T1 based on the distribution content in the demodulation information.
The integrated processing module 202 is connected to the navigation receiver unit T2, the space-based receiving module 201, the space-based transmitting module 203 and the data storage unit T1 of the space-based platform through transmission cables, and the integrated processing module 202 performs data transmission with the navigation receiver unit T2, the space-based receiving module 201, the space-based transmitting module 203 and the data storage unit T1 in a wired transmission manner.
In this embodiment of the present invention, the above-mentioned azimuth direction of the antenna of the space-based transmitting module 203 includes: the relative azimuth and elevation angles of the space based platform and user Y at the time of distribution.
The relative azimuth angle and the relative pitch angle of the space-based platform and the user Y can be obtained through calculation in the following modes: the direction calculation unit 2021 obtains the coordinates of the space-based platform at the distribution time by reading the data of the navigation receiver unit T2, and then, by combining the distribution position in the distribution information, where the distribution position is the coordinates of the user Y at the distribution time, calculates the coordinates of the space-based platform and the coordinates of the user Y, and thus, the relative azimuth angle and the relative pitch angle of the space-based platform and the user Y at the distribution time can be obtained.
Specifically, the coordinates of the space-based platform at the distribution time are set to be (Xs, Ys, Zs), the coordinates of the user Y at the distribution time are set to be (Xa, Ya, Za), and the relative azimuth angle α and the relative pitch angle β are calculated and obtained through the following formula 1;
in this embodiment of the present invention, the array element calculating unit 2022 is configured to calculate a beam size and a number of working array elements of the phased array antenna unit according to the distribution range information in the demodulation information, and the phased array antenna unit adjusts the number of working array elements thereof according to the calculation data of the array element calculating unit 2022, so that the transmission range of the space-based transmitting module 203 corresponds to the distribution range in the distribution information.
In order to adjust the transmission range of the space-based transmission module 203, in the embodiment of the present invention, the phased array antenna unit includes 16 sixteen array elements, and the 16 sixteen array elements adopt a combined operation mode. Specifically, when the phased array antenna unit adopts the working mode that a single sixteen-array element unit works, the antenna beam angle of the phased array antenna unit is the largest, and the distribution coverage range is the widest, and when the phased array antenna unit adopts the working mode that 16 sixteen-array element units work simultaneously, the antenna beam angle of the phased array antenna unit is the smallest, and the distribution coverage range is the narrowest, that is, when the number of the sixteen-array element units working in the phased array antenna unit is more, the antenna beam angle is smaller, and the corresponding distribution coverage range is narrow.
Specifically, in the phased array antenna unit, the number of working array elements N and the antenna beam width thetaBWSatisfies the following formula 2:
where k is the beam width factor and β is the relative elevation angle.
In the embodiment of the invention, four different adjustment modes of distribution coverage range are provided for the distribution coverage range of the space-based transmitting module 203. The first gear is that a single sixteen array element unit works, namely 16 array elements work; the second gear is that 4 sixteen array elements work simultaneously, namely 64 array elements work; the third gear is that 9 sixteen array elements work at the same time, namely 144 array elements work; the fourth gear is that 16 sixteen array elements work simultaneously, namely 256 array elements work.
Further, in the embodiment of the present invention, the space-based receiving module 201 employs an omnidirectional receiving antenna to the ground. With this arrangement, it is possible to receive an information exchange request from the mobile transceiver terminal 1 of an arbitrary user Y within the range of visibility under the satellite.
In the embodiment of the invention, the track calculation module 101 calculates the positions of the space-based platform at different moments according to the motion parameters of the space-based platform; for the space-based platform installed on the satellite, the orbit calculation module 101 calculates the position of the space-based platform at different times according to the orbit parameters of the satellite.
In addition, the invention also provides a space-based information distribution method implemented by using the space-based information distribution system.
The method comprises the following steps:
the track calculation module 101 calculates the positions of the space-based platform at different moments according to the motion parameters of the space-based platform, and sends position information to the task generation module 102 and the wireless transceiving module 103;
the task generating module 102 generates distribution information including distribution content, distribution time, distribution position and distribution range according to the user Y requirement and position information, and transmits the distribution information to the wireless transceiving module 103;
the wireless transceiving module 103 sends the distribution information to the space-based platform through wireless signals;
a space-based receiving module 201 in the space-based platform receives and demodulates the wireless signal sent by the wireless transceiving module 103, acquires distribution information corresponding to the wireless signal, and sends the distribution information to a comprehensive processing module 202;
the comprehensive processing module 202 calculates the transmitting direction of the space-based transmitting module 203 according to the distribution position in the distribution information and the position of the space-based platform corresponding to the distribution time, calculates the number of working array elements of the phased array antenna unit according to the distribution range in the distribution information, reads the space-based information of a data storage unit T1 in the space-based platform according to the distribution content of the distribution information, and transmits the transmitting direction information, the number information of the working array elements and the space-based information to the space-based transmitting module 203;
the phased array antenna unit of the space-based transmitting module 203 adjusts the direction pointing of the antenna and the number of the working array elements of the phased array antenna unit according to the transmitting azimuth information and the number information of the working array elements, the modulating unit of the space-based transmitting module 203 modulates the space-based information and sends the modulated information to the phased array antenna unit, and the phased array antenna unit sends the modulated information to the wireless transceiver module 103 through a space signal.
Therefore, the space-based information distribution method provided by the embodiment of the invention can directly distribute the space-based information of the space-based platform to the user Y, saves a ground station transfer link, and has higher timeliness; the space-based platform is directly connected with the user Y, so that the problem that the user Y cannot receive the space-based information due to the fact that the ground station is damaged can be avoided, and the safety is high; by adjusting the phased array antenna unit of the space-based transmitting module 203, the transmitting area of the space-based transmitting module 203 can be adjusted, information distribution of users Y in all under-satellite visible ranges is realized, and the problem that the space-based information cannot be received in areas such as remote land, islands, oceans and the like and mobile users Y such as airplanes and ships can be effectively solved.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. In addition, "front", "rear", "left", "right", "upper" and "lower" in this document are referred to the placement states shown in the drawings.
Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A space-based information distribution system, the system comprising: the mobile terminal (1) is installed on a user (Y), the space-based distribution terminal (2) is installed on a space-based platform, and the mobile terminal (1) is connected with the space-based distribution terminal (2) in a wireless connection mode;
the mobile transceiver terminal (1) comprises: the system comprises a track calculation module (101), a task generation module (102) and a wireless transceiving module (103) which are connected with each other; the track calculation module (101) calculates the positions of the space-based platform at different moments, and sends position information to the task generation module (102) and the wireless transceiver module (103); the task generating module (102) generates distribution information comprising distribution content, distribution time, distribution position and distribution range according to the requirement of a user (Y), and sends the distribution information to the wireless transceiving module (103); the wireless transceiving module (103) is used for carrying out signal transmission with the space-based platform;
the orbit calculation module (101) calculates the positions of the space-based platform at different moments according to the orbit parameters of the satellite;
the space-based distribution terminal (2) includes: the antenna comprises an antenna base receiving module (201), a comprehensive processing module (202) and an antenna base transmitting module (203) which are connected in sequence, wherein the antenna base transmitting module (203) comprises a modulating unit and a phased array antenna unit which are connected with each other; the space-based receiving module (201) is wirelessly connected with the wireless transceiving module (103) and is used for receiving and demodulating a wireless signal corresponding to the distribution information sent by the wireless transceiving module (103) and sending the demodulated information to the comprehensive processing module (202); the comprehensive processing module (202) calculates the transmitting direction of the space-based transmitting module (203) according to the demodulation information, calculates the number of working array elements of the phased array antenna unit, reads the space-based information of a data storage unit (T1) in the space-based platform, and sends the transmitting direction information, the number information of the working array elements and the space-based information to the space-based transmitting module (203); the modulation unit is used for modulating the space-based information, the phased array antenna unit adjusts the antenna direction and the working array elements according to the transmitting azimuth information and the working array element quantity information, and the modulated space-based information is sent to the wireless transceiving module (103);
phased array antenna element includes 16 sixteen array element units, 16 sixteen array element units adopt the combination mode, phased array antenna element has four working methods of first shelves, second shelves, third shelves and fourth shelves, first shelves are single sixteen array element unit work, the second shelves are 4 sixteen array element unit work, the third shelves are 9 sixteen array element unit work, the fourth shelves are 16 sixteen array element unit work.
2. The space-based information distribution system according to claim 1, wherein the comprehensive processing module (202) includes a point calculation unit (2021), an array element calculation unit (2022), and an information buffer unit (2023);
the direction calculation unit (2021) is connected with a navigation receiver unit (T2) of the space-based platform, the direction calculation unit (2021) reads the position information of the space-based platform in the navigation receiver unit (T2), and calculates the direction of the antenna of the space-based transmission module (203) according to the position information of the space-based platform and the distribution position and distribution time information in the demodulation information;
the array element calculating unit (2022) calculates the wave beam size and the number of working array elements of the phased array antenna unit according to the distribution range information in the demodulation information;
the information buffer unit (2023) is connected with the data storage unit (T1), and the information buffer unit (2023) reads the day-based information corresponding to the distribution content in the data storage unit (T1) according to the distribution content in the demodulation information.
3. The space-based information distribution system according to claim 2, wherein the integrated processing module (202) connects the navigation receiver unit (T2), the space-based receiving module (201), the space-based transmitting module (203), and the data storage unit (T1) of the space-based platform through transmission cables, respectively.
4. The space-based information distribution system according to claim 3, wherein the azimuth pointing direction of the antenna of the space-based transmission module (203) includes: -a relative azimuth and a relative pitch angle of the space based platform and the user (Y) at the moment of distribution.
5. The space-based information distribution system according to claim 4, wherein coordinates of the space-based platform at the distribution time are set to (Xs, Ys, Zs), coordinates of the user (Y) at the distribution time are set to (Xa, Ya, Za), and the relative azimuth angle α and the relative pitch angle β are calculated by the following formula 1;
6. the space-based information distribution system according to claim 5, wherein in the phased array antenna unit, the number N of active elements and the antenna beam width θBWSatisfies the following formula 2:
wherein k is a beam width factor and β is the relative elevation angle.
7. The space-based information distribution system according to claim 1 or 6, characterized in that the space-based receiving module (201) employs an omnidirectional receiving antenna to the ground.
8. A method of day-based information distribution implemented with the system of any one of claims 1 to 7, the method comprising:
the track calculation module (101) calculates the positions of the space-based platform at different moments according to the motion parameters of the space-based platform, and sends position information to the task generation module (102) and the wireless transceiver module (103);
the task generating module (102) generates distribution information including distribution content, distribution time, distribution position and distribution range according to the user (Y) requirement and the position information, and sends the distribution information to the wireless transceiving module (103);
the wireless transceiving module (103) transmits the distribution information to the space-based platform through a wireless signal;
the space-based receiving module (201) in the space-based platform receives and demodulates the wireless signals sent by the wireless transceiving module (103), acquires the distribution information corresponding to the wireless signals, and sends the distribution information to the comprehensive processing module (202);
the comprehensive processing module (202) calculates the transmitting direction of the space-based transmitting module (203) according to the distribution position in the distribution information and the position of the space-based platform corresponding to the distribution time, calculates the number of working array elements of the phased array antenna unit according to the distribution range in the distribution information, reads the space-based information of the data storage unit (T1) in the space-based platform according to the distribution content of the distribution information, and sends the transmitting direction information, the number information of the working array elements and the space-based information to the space-based transmitting module (203);
the phased array antenna unit of the antenna-based transmitting module (203) adjusts the direction pointing of the antenna and the number of the working array elements of the phased array antenna unit according to the transmitting azimuth information and the number information of the working array elements, the modulating unit of the antenna-based transmitting module (203) modulates the antenna-based information and sends the modulated information to the phased array antenna unit, and the phased array antenna unit sends the modulated information to the wireless transceiving module (103) through a space signal.
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