CN106850034A - Low orbit satellite data transmission system - Google Patents
Low orbit satellite data transmission system Download PDFInfo
- Publication number
- CN106850034A CN106850034A CN201710091104.1A CN201710091104A CN106850034A CN 106850034 A CN106850034 A CN 106850034A CN 201710091104 A CN201710091104 A CN 201710091104A CN 106850034 A CN106850034 A CN 106850034A
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- Prior art keywords
- satellite
- transmitting
- low orbit
- ground
- terminal
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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
- H04B7/155—Ground-based stations
- H04B7/15507—Relay station based processing for cell extension or control of coverage area
-
- 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
- H04B7/18502—Airborne stations
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/025—Services making use of location information using location based information parameters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/06—Airborne or Satellite Networks
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Aviation & Aerospace Engineering (AREA)
- Radio Relay Systems (AREA)
Abstract
The invention discloses low orbit satellite data transmission system, including：Low orbit satellite sending and receiving end and terrestrial user terminals；The terrestrial user terminals send positional information to the low orbit satellite sending and receiving end, and low orbit satellite sending and receiving end transmission antenna points to terrestrial user terminals, and sends business datum.
Description
Technical field
The invention belongs to wireless communication field, more particularly to a kind of low orbit satellite data transmission system.
Background technology
Low orbit satellite data transmission system is one of common system of low orbit satellite, is mainly used in Satellite Payloads number
According at a high speed under pass.Constraint of the low orbit satellite platform in resource and the energy is limited to, is accurately referred to solve low orbit satellite spot beam
To problem, sent using satellite broad beam at present, ground major station (the general big antenna using 6m bores) high-gain tracking connects
Receive, also needed to after the construction cost of ground major station is higher, quantity available is less, poor mobility, and ground major station receives data
Secondary transmission is carried out, the extensive use of satellite is largely limited.
The content of the invention
The problem that the present invention is solved is low existing low orbit satellite data transmission technology high cost, efficiency；Asked described in solving
Topic, the present invention provides low orbit satellite data transmission system.
The low orbit satellite data transmission system that the present invention is provided, including：Low orbit satellite sending and receiving end and terrestrial user terminals；Institute
State terrestrial user terminals and send positional information to the low orbit satellite sending and receiving end, low orbit satellite sending and receiving end transmission antenna points to ground
User terminal, and send business datum.
Further, the low orbit satellite sending and receiving end includes broad beam reception antenna, satellite transmitting-receiving process system, phased array electricity
Sweep transmitting spot beam anternma；The broad beam reception antenna receives terrestrial user terminals upward signal；The satellite transmitting-receiving process
The system treatment upward signal, obtains positional information, and guiding phased array electricity sweeps transmitting spot beam anternma and points to and track ground
User terminal, earthward user terminal send business datum.
Further, the satellite transmitting-receiving process system includes：The transmitting that transmitting spot beam anternma is connected is swept with phased array electricity
End, the receiving terminal being connected with broad beam reception antenna, processing module and control module；The processing module is received to receiving terminal
Signal carry out treatment reduction, the information after reduction after decoding as downstream module control and downstream signal are formed according to
According to eventually forming the high frequency electrical signal of descending transmission；Control module control transmitting terminal, receiving terminal and processing module work.
Further, the terrestrial user terminals include：Ground transmitting-receiving process system and ground dual-mode antenna；Receive on the ground
Hair processing system predicts satellite transit time according to the satellite ephemeris for prestoring, and in the course of transit sends position letter to satellite in satellite
Breath.
Further, the ground transmitting-receiving process system includes：Ground transmitting-receiving process communication equipment, ground dual-mode antenna and servo
Mechanism, the hand-held control in ground and the aobvious Miniature Terminal of prison；The hand-held control in ground and the aobvious Miniature Terminal of prison contain message processing module and letter
Breath memory module, message processing module prediction satellite transit time, and control ground transmitting-receiving process communication equipment, ground dual-mode antenna
And servo control mechanism photos and sending messages, and with application data disposal ability, can quick display processing result；Information storage module storage letter
Breath, almanac data and application data are stored.
Advantages of the present invention includes：
Technical scheme, small-scale terrestrial user terminal is realized to the wireless of satellite using small-scale terrestrial dual-mode antenna
Telecommunication, satellite broad beam receives spot beam and sends, and small-scale terrestrial user terminal is in the course of transit believed in satellite by low speed upstream
Road active reporting own location information, satellite reception simultaneously extracts and guide after small-scale terrestrial position information of user's terminal phased array electricity and sweep
Transmitting spot beam transmission antenna is accurately directed to, so as to realize sending the high-gain spot beam of small-scale terrestrial user terminal.This is
System scheme is convenient to carry out Miniaturization Design to terminal, and reduces cost is easy to carry and moves, and terminal user can be according to real-time need
Ask, directly carry out two-way communication with satellite, enter in visual segmental arc in satellite and guided and order injection by upper note position, obtain
The real-time or delay data that satellite is issued.
Brief description of the drawings
Fig. 1 is the schematic diagram of low orbit satellite data transmission system provided in an embodiment of the present invention；
Specific embodiment
Hereinafter, spirit and substance of the present invention are further elaborated in conjunction with the accompanying drawings and embodiments.
As stated in the Background Art, the data that low orbit satellite is issued, ground major station are received using ground major station in the prior art
Data receiver can be solved the problems, such as；But because ground major station complex structure, volume are big, poor mobility, cause high cost, effect
Rate is low；And ground major station also needs to the secondary transmission of earthward user terminal after receiving；Additionally, obtain data every time to be required to carry
Preplanning, arranges resource, the data of acquisition to have certain time delay；To solve described problem, the present invention provides a kind of low rail and defends
Star Transmission system and method.
As shown in figure 1, the low orbit satellite Transmission system that the present invention is provided, including：Low orbit satellite sending and receiving end and terrestrial user
Terminal；The low orbit satellite sending and receiving end includes that broad beam reception antenna 02, satellite transmitting-receiving process system 01, phased array electricity sweep transmitting
Spot beam anternma 03；The broad beam reception antenna 03 receives terrestrial user terminals upward signal；The satellite transmitting-receiving process system
The system treatment upward signal, obtains positional information, guiding control phased array transmitter-on, and phased array electricity is swept into launch point
Beam antenna 03 is pointed to and tracks terrestrial user terminals, and earthward user terminal reports track and status data, and subsequent ground is used
Family terminal sends task and data request command after receiving satellite state information, and phased array electricity sweeps transmitting spot beam anternma 03 and is
Uplink/downlink antenna, points to and tracks terrestrial user terminals and send business datum according to task and request of data all the time.
The terrestrial user terminals include：Ground transmitting-receiving process communication equipment 11, ground dual-mode antenna and servo control mechanism 12,
The hand-held control in face and the aobvious Miniature Terminal 13 of prison；The hand-held control in ground and the aobvious Miniature Terminal of prison are pre- according to the satellite ephemeris for prestoring
Satellite transit time is surveyed, and ground transmitting-receiving process communication equipment, ground transmitting-receiving day are in the course of transit controlled by wifi module in satellite
Line and servo control mechanism send own location information to satellite, and after satellite points to terminal, the hand-held control in ground and prison show small-sized end
The state and orbit information that the satellite that end will receive is issued show in real time, while user's editable assignment instructions, send to satellite
Request, and receive the business datum that satellite is issued.
The satellite transmitting-receiving process system includes：The transmitting terminal that transmitting spot beam anternma is connected is swept with phased array electricity, with width
The receiving terminal of wave beam reception antenna connection, processing module and control module；The signal that the processing module is received to receiving terminal
Treatment reduction is carried out, the information after reduction is after decoding as the foundation formed to downstream module control and downstream signal；Simultaneously
Downward signal of satellite be compiled, modulated, filtered, the treatment such as up-conversion forms the high frequency electrical signal of descending transmission, and sends
Transmitting spot beam anternma is swept to phased array electricity；Control module control transmitting terminal, receiving terminal and processing module work.
The present invention is also provided using the transmission method of the low orbit satellite Transmission system, including：
Step one, terrestrial user terminals predict transit time according to ephemeris, and positional information is sent to low orbit satellite sending and receiving end；
Uplink/downlink antenna is pointed to user terminal, to user terminal by step 2, low orbit satellite by broad beam receiving position information
Send ephemeris and status information.
Step 3, terrestrial user terminals receive ephemeris and status information, and user's decision-making sends assignment instructions information.
Step 4, low orbit satellite transmitting-receiving process system receive task, and perform task, as requested issuing service number
According to.
Step 5, terrestrial user terminals receive business datum and data are parsed and regarded soon.
The step one includes：
Satellite is pointed in step 1.1, terrestrial user terminals prediction satellite transit time and track, control antenna servo tracking；
Step 1.2, terrestrial user terminals (PAD) obtain warp, latitude, the information high of present position by GPS module, should
ECEF coordinate system is converted thereof into software, the fixed frame format of composition starts to be continuously transmitted to satellite when satellite is entered a country,
The signal that issues of satellite to be received and the synchronizing information such as simultaneously.
The step 2 includes：
Step 2.1, low orbit satellite sending and receiving end receive the positional information, and the information to receiving is verified and carried out
Reduction；
Customer location and satellite orbit and attitude meter are combined after step 2.2, low orbit satellite sending and receiving end are correct to position verification
Beam direction is calculated, beam-control code is formed and is controlled descending spot beam to point to.
Step 2.3, the control of low orbit satellite sending and receiving end send power amplifier and open, and phased array electricity sweeps transmitting spot beam anternma and points to ground
Face user terminal, starts to send the orbit information and satellite state information of satellite.
The step 3 includes：
Step 3.1, ground transmitting-receiving process communication equipment receive track and the status information that satellite is issued, and information is passed through
Wifi reaches hand-held control and the aobvious Miniature Terminal (PAD) of prison, shows health status and orbit information, and it is enough to provide the user judgement
Continue executing with the foundation of task.
Step 3.2, user may be selected program and judge to send preset instructions, or the mode that user sends manually by task automatically
Command information is sent to satellite, completes real-time task request.
The step 4 includes：
Step 4.1, low orbit satellite sending and receiving end receive the real-time task request instruction, according to instruction format checking command code
Correctness.
Step 4.2, decision instruction type, if instruction pertains only to the execution of low orbit satellite Transmission system, directly decode simultaneously
Perform, issue asked business datum.If instruction is related to the cooperation execution of other systems of satellite, instruction is transmitted to star
Business computer, relevant control is performed by Star Service according to mission requirements, and forms business datum, and is transmitted by the low orbit satellite
System issues data.
The step 5 includes：
Step 5.1, ground transmitting-receiving process communication equipment receive the business datum that satellite is issued, and business datum is passed through in real time
Wifi is transmitted to hand-held control and the aobvious Miniature Terminal (PAD) of prison.
Business datum is carried out dissection process by step 5.2, hand-held control and the aobvious Miniature Terminal (PAD) of prison, and completes real-time
Display.
To sum up, in technical scheme, system has two channels of up-downgoing, and satellite is received using broad beam low speed
Information and assignment instructions information are injected in ground based terminal position, and satellite sweeps transmitting spot beam and realizes sending out over the ground at a high speed using phased array electricity
Send；Small-scale terrestrial user terminal predicted orbit and immigration time before this on communication process, in satellite in the course of transit active reporting
Own location information, satellite broad beam antenna guides satellite phased array after receiving using the positional information of small-scale terrestrial user terminal
E-scan antenna transmitting spot beam is accurately directed to ground based terminal, completes the foundation of star ground bidirectional communication link, realizes to small-scale terrestrial
The high-gain spot beam of user terminal sends；Satellite broad beam is received and spot beam transmitting cooperation solves low orbit satellite spot beam
Being accurately directed to difficult and satellite broad beam gain cannot meet the problem that ground Miniature Terminal is received at a high speed, realize small-scale terrestrial
Terminal region be directly facing satellite two-way communication function.
Although the present invention is disclosed as above with preferred embodiment, it is not for limiting the present invention, any this area
Technical staff without departing from the spirit and scope of the present invention, may be by the methods and techniques content of the disclosure above to this hair
Bright technical scheme makes possible variation and modification, therefore, every content without departing from technical solution of the present invention, according to the present invention
Any simple modification, equivalent variation and modification for being made to above example of technical spirit, belong to technical solution of the present invention
Protection domain.
Claims (5)
1. low orbit satellite data transmission system, it is characterised in that including：Low orbit satellite sending and receiving end and terrestrial user terminals；It is described
Terrestrial user terminals send positional information to the low orbit satellite sending and receiving end, and low orbit satellite sending and receiving end transmission antenna points to ground and uses
Family terminal, and send business datum.
2. according to the low orbit satellite data transmission system described in claim 1, it is characterised in that the low orbit satellite sending and receiving end bag
Include broad beam reception antenna, satellite transmitting-receiving process system, phased array electricity and sweep transmitting spot beam anternma；The broad beam reception antenna
Receive terrestrial user terminals upward signal；The satellite transmitting-receiving process system processes the upward signal, obtains positional information, draws
Lead phased array electricity sweep transmitting spot beam anternma point to and track terrestrial user terminals, earthward user terminal send business datum.
3. according to the low orbit satellite data transmission system described in claim 2, it is characterised in that the satellite transmitting-receiving process system
Including：The transmitting terminal that transmitting spot beam anternma is connected, the receiving terminal being connected with broad beam reception antenna, treatment are swept with phased array electricity
Module and control module；The signal that the processing module is received to receiving terminal carries out treatment reduction, is passed through with the information after reduction
Decode as the foundation formed to downstream module control and downstream signal, form the high frequency electrical signal of descending transmission；Control module
Control transmitting terminal, receiving terminal and processing module work.
4. according to the low orbit satellite data transmission system described in claim 1, it is characterised in that the terrestrial user terminals bag
Include：Ground transmitting-receiving process communication equipment, ground dual-mode antenna and servo control mechanism, the hand-held control in ground and the aobvious Miniature Terminal of prison；It is described
The hand-held control in ground and the aobvious Miniature Terminal of prison predict satellite transit time according to the satellite ephemeris for prestoring, and in satellite in the course of transit
The described ground transmitting-receiving process communication equipment of control, ground dual-mode antenna and servo control mechanism send positional information to satellite, and receive
Almanac data, status information, application data that satellite is issued.
5. according to the low orbit satellite data transmission system described in claim 4, it is characterised in that the hand-held control in ground and prison
Aobvious Miniature Terminal includes：Information storage module and message processing module；Message processing module predicts satellite transit time, and controls
Ground transmitting-receiving process communication equipment, ground dual-mode antenna and servo control mechanism photos and sending messages, and with application data disposal ability, it is quick aobvious
Show result；Information storage module storage information, almanac data and application data are stored.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710091104.1A CN106850034B (en) | 2017-02-20 | 2017-02-20 | Low orbit satellite data transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710091104.1A CN106850034B (en) | 2017-02-20 | 2017-02-20 | Low orbit satellite data transmission system |
Publications (2)
| Publication Number | Publication Date |
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| CN106850034A true CN106850034A (en) | 2017-06-13 |
| CN106850034B CN106850034B (en) | 2019-07-23 |
Family
ID=59129169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710091104.1A Active CN106850034B (en) | 2017-02-20 | 2017-02-20 | Low orbit satellite data transmission system |
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| CN (1) | CN106850034B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106888047A (en) * | 2017-02-20 | 2017-06-23 | 上海微小卫星工程中心 | Low orbit satellite data transmission method |
| CN108494469A (en) * | 2018-02-02 | 2018-09-04 | 北京国电高科科技有限公司 | A kind of communication means of downlink for data gathering system load |
| CN109037968A (en) * | 2018-07-24 | 2018-12-18 | 上海微小卫星工程中心 | A kind of low orbit satellite access antenna system that width wave beam combines |
| CN109768824A (en) * | 2019-01-17 | 2019-05-17 | 西安电子科技大学 | Low orbit satellite data transmission method, system, computer equipment and storage medium |
| CN110011725A (en) * | 2019-05-07 | 2019-07-12 | 中国人民解放军32039部队 | Repeater satellite tracking and device |
| CN110489226A (en) * | 2019-07-05 | 2019-11-22 | 中国科学院国家空间科学中心 | A kind of in-orbit virtual method of space-based resource calculated based on available capability |
| CN112636809A (en) * | 2020-12-07 | 2021-04-09 | 山东航天电子技术研究所 | Satellite-borne relay user terminal supporting SSA and SMA links |
| CN114509790A (en) * | 2022-02-17 | 2022-05-17 | 北京国电高科科技有限公司 | Positioning method and positioning system based on low-orbit satellite constellation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8120528B2 (en) * | 2008-05-14 | 2012-02-21 | Thomas Ronald Tessier | Apparatus for satellite telecommunications |
| CN104079496A (en) * | 2014-07-02 | 2014-10-01 | 南京邮电大学 | Double-deck satellite load balancing method based on link cost conversion |
| CN104702547A (en) * | 2014-09-25 | 2015-06-10 | 上海欧科微航天科技有限公司 | Pilot frequency information and satellite ephemeris joint Doppler frequency shift estimation and compensation method |
| CN106253964A (en) * | 2015-06-09 | 2016-12-21 | 北京信威通信技术股份有限公司 | Mobile communication system based on Constellation of Low Earth Orbit Satellites network and method |
| CN106888047A (en) * | 2017-02-20 | 2017-06-23 | 上海微小卫星工程中心 | Low orbit satellite data transmission method |
-
2017
- 2017-02-20 CN CN201710091104.1A patent/CN106850034B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8120528B2 (en) * | 2008-05-14 | 2012-02-21 | Thomas Ronald Tessier | Apparatus for satellite telecommunications |
| CN104079496A (en) * | 2014-07-02 | 2014-10-01 | 南京邮电大学 | Double-deck satellite load balancing method based on link cost conversion |
| CN104702547A (en) * | 2014-09-25 | 2015-06-10 | 上海欧科微航天科技有限公司 | Pilot frequency information and satellite ephemeris joint Doppler frequency shift estimation and compensation method |
| CN106253964A (en) * | 2015-06-09 | 2016-12-21 | 北京信威通信技术股份有限公司 | Mobile communication system based on Constellation of Low Earth Orbit Satellites network and method |
| CN106888047A (en) * | 2017-02-20 | 2017-06-23 | 上海微小卫星工程中心 | Low orbit satellite data transmission method |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106888047A (en) * | 2017-02-20 | 2017-06-23 | 上海微小卫星工程中心 | Low orbit satellite data transmission method |
| CN106888047B (en) * | 2017-02-20 | 2019-07-23 | 上海微小卫星工程中心 | Low orbit satellite data transmission method |
| CN108494469A (en) * | 2018-02-02 | 2018-09-04 | 北京国电高科科技有限公司 | A kind of communication means of downlink for data gathering system load |
| CN109037968A (en) * | 2018-07-24 | 2018-12-18 | 上海微小卫星工程中心 | A kind of low orbit satellite access antenna system that width wave beam combines |
| CN109037968B (en) * | 2018-07-24 | 2021-04-09 | 上海微小卫星工程中心 | Low-orbit satellite access antenna system with combination of wide and narrow beams |
| CN109768824A (en) * | 2019-01-17 | 2019-05-17 | 西安电子科技大学 | Low orbit satellite data transmission method, system, computer equipment and storage medium |
| CN110011725A (en) * | 2019-05-07 | 2019-07-12 | 中国人民解放军32039部队 | Repeater satellite tracking and device |
| CN110489226A (en) * | 2019-07-05 | 2019-11-22 | 中国科学院国家空间科学中心 | A kind of in-orbit virtual method of space-based resource calculated based on available capability |
| CN110489226B (en) * | 2019-07-05 | 2021-11-09 | 中国科学院国家空间科学中心 | Space-based resource on-orbit virtualization method based on available capacity calculation |
| CN112636809A (en) * | 2020-12-07 | 2021-04-09 | 山东航天电子技术研究所 | Satellite-borne relay user terminal supporting SSA and SMA links |
| CN114509790A (en) * | 2022-02-17 | 2022-05-17 | 北京国电高科科技有限公司 | Positioning method and positioning system based on low-orbit satellite constellation |
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