CN109257092A - A kind of satellite communication system - Google Patents
A kind of satellite communication system Download PDFInfo
- Publication number
- CN109257092A CN109257092A CN201811307833.7A CN201811307833A CN109257092A CN 109257092 A CN109257092 A CN 109257092A CN 201811307833 A CN201811307833 A CN 201811307833A CN 109257092 A CN109257092 A CN 109257092A
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- Prior art keywords
- satellite
- relaying
- communication
- satellite communication
- communication system
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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
-
- 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
- H04B10/114—Indoor or close-range type systems
- H04B10/116—Visible light communication
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Radio Relay Systems (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a kind of satellite communication system, which includes: telecommunication satellite, relaying and communication terminal；Wherein, there is satellite communication link between telecommunication satellite and relaying, there is relayed communications link between relaying and communication terminal；It is communicated on satellite communication link using radio wave, is communicated on repeated link using free space optical.Since free space optical communication (FSO, Free Space Optical communication) can carry out signal propagation in the condition of non-LOS.Thus, signal propagation can be carried out under conditions of non-LOS using free space optical communication in the relayed communications link between relaying and communication terminal, increase the signal cover of satellite communication system.
Description
Technical field
The present invention relates to fields of communication technology, more particularly to a kind of satellite communication system.
Background technique
Satellite system has been widely used for broadcasting, navigation and disaster recovery.The signal transmission form of most common satellite communication:
Passing of satelline terrestrial repetition is communicated with the communication terminal (such as satellite phone, satellite television) on ground.
Currently, being communicated in satellite system using radio wave, and the landforms relayed between communication terminal are more multiple
It is miscellaneous.Referring to FIG. 1, because of various barrier obstructions, such as mountain peak, high building.This will lead between relaying and communication terminal
It is unsatisfactory for sighting distance (LOS) condition, causes signal link to disconnect or can not connect (in figure label × communication link), and then lead
Cause satellite system signal limited coverage area.
In conclusion the problems such as how effectively improving the signal cover of satellite system, is current art technology
Personnel's technical problem urgently to be solved.
Summary of the invention
The object of the present invention is to provide a kind of satellite communication systems, to improve the signal transmission performance of satellite communication system.
In order to solve the above technical problems, the invention provides the following technical scheme:
A kind of satellite communication system, comprising:
Telecommunication satellite, relaying and communication terminal；Wherein, there is satellite communication chain between the telecommunication satellite and the relaying
Road has relayed communications link between the relaying and the communication terminal；Radio is utilized on the satellite communication link
Wave is communicated, and is communicated on the repeated link using free space optical.
Preferably, the telecommunication satellite is the synchronous satellite positioned at equator overhead.
Preferably, the relaying includes: photoelectric converter, optical sender and photoreceiver.
Preferably, the photoreceiver includes optical lens antenna.
Preferably, the optical sender includes light emitting diode or laser diode.
Preferably, when the quantity of the relaying be two with two or more when, free space optical is utilized between the relaying
It is communicated.
Preferably, further includes:
Solar panel, the solar panel provide power supply for the relaying.
Using satellite communication system provided by the embodiment of the present invention, which includes: that telecommunication satellite, relaying and communication are whole
End；Wherein, there is satellite communication link between telecommunication satellite and relaying, there is relayed communications chain between relaying and communication terminal
Road；It is communicated on satellite communication link using radio wave, is communicated on repeated link using free space optical.By
In free space optical communication (FSO, Free Space Optical communication) signal can be carried out in the condition of non-LOS
It propagates.Thus, it can be in the item of non-LOS using free space optical communication in the relayed communications link between relaying and communication terminal
Signal propagation is carried out under part, increases the signal cover of satellite communication system.
In addition, since free space optical communication also has low strong security, amount demand, low transmitting power, high reception
The advantages that power, big transmission capacity, can also further promote the signal transmission performance of satellite communication system, reduce energy consumption.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the barrier schematic diagram between relaying and communication terminal in existing satellite communication system；
Fig. 2 is a kind of implementation diagram of satellite communication system in the embodiment of the present invention.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.Obviously, described embodiments are only a part of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
Referring to FIG. 2, Fig. 2 is a kind of implementation diagram of satellite communication system in the embodiment of the present invention.The system includes:
Telecommunication satellite 100, relaying 200 and communication terminal 300；Wherein, there is satellite communication between telecommunication satellite and relaying
Link has relayed communications link between relaying and communication terminal；Led on satellite communication link using radio wave RF
Letter, is communicated on repeated link using free space optical.
It should be noted that only depicted in Fig. 2 one relaying and a communication terminal, in practical applications with it is same
A relaying carry out free optic communication communication terminal quantity can be it is multiple, the quantity correspondingly relayed can also be multiple.Preferably,
When the quantity of relaying be two with two or more when, communicated using free space optical between relaying.In this way, can be not necessarily to
When design relaying addressing, LOS condition is considered, while will not be short because causing throughput of system occur using RF communication between relaying
Plate.
Wherein, telecommunication satellite can be synchronous satellite or near-earth satellite.Preferably, in order to reduce the quantity for disposing relay station,
Synchronous satellite can be used and carry out signal transmission, is i.e. telecommunication satellite is the synchronous satellite positioned at equator overhead.Synchronous satellite refers to its public affairs
Turn with track centre star from cycle turnover and direction satellite all the same.As long as the advantages of synchronous satellite is that user's alignment is artificial
Satellite can be linked up the track without satellite tracking again.
Wherein, free space optical communication (FSO, Free Space Optical communication) can be used as non-LOS
Condition carry out signal propagation.Wherein, LOS (Line-of-sight) sighting distance, in wireless communications, transmitting and receiving antenna must
Palpus two o'clock can look at straight, and centre is not blocked, and corresponding is NLOS, i.e. non line of sight.Due between relaying and communication terminal
Barrier is more, and complex, and space optical communication is used between relaying and communication terminal, can be under conditions of non-LOS
Carry out signal propagation.Wherein, RF is the abbreviation of Radio Frequency, means radio frequency.
Since the satellite communication link between relaying and telecommunication satellite still uses radio wave to be communicated, thus for
Telecommunication satellite can be without being changed, it is only necessary in the equipment that terrestrial repetition addition is used for free-space communication.It relays and logical
When believing the signal transmission between terminal, the common processing mode with optical cable transmission signal can refer to.With optical cable transmitting signal
Difference be that the carrier of propagating optical signal is different, i.e., light letter is propagated in the embodiment of the present invention between relaying and communication terminal
Number medium be direct exposed free space or air；And when optical cable being used to propagate, then optical signal beam is tied to optical cable
In optical fiber in propagated.For example, the relaying can include: photoelectric converter, optical sender and photoreceiver.That is,
Relaying uses radio wave to be communicated between telecommunication satellite, after the signal obtained in the radio wave, can pass through electric light
Conversion equipment converts a signal into optical signal launch and goes out.Certainly, if after the optical signal that relay reception is sent to communication terminal,
Electric signal can be converted optical signals to, and then converts electrical signals to radio wave signal, is sent to telecommunication satellite.Wherein, light
Receiving device of the receiver as such as with optical lens antenna.Wherein, include luminescent device in optical transmitter, such as shine
Diode or laser diode.
Using satellite communication system provided by the embodiment of the present invention, which includes: that telecommunication satellite, relaying and communication are whole
End；Wherein, there is satellite communication link between telecommunication satellite and relaying, there is relayed communications chain between relaying and communication terminal
Road；It is communicated on satellite communication link using radio wave, is communicated on repeated link using free space optical.By
In free space optical communication (FSO, Free Space Optical communication) signal can be carried out in the condition of non-LOS
It propagates.Thus, it can be in the item of non-LOS using free space optical communication in the relayed communications link between relaying and communication terminal
Signal propagation is carried out under part, increases the signal cover of satellite communication system.
Wherein, FSO optic communication has the advantage that
1, micron-sized Angle of beam divergence and stable direction.Angle of beam divergence is directly proportional to wavelength.The work of optic communication
Wavelength generally in micron dimension or smaller, and and microwave communication wave-length coverage between hundreds of meters to sub- centimetre.Therefore, light is logical
The beam divergence angle ratio RP of letter and microwave communication are to when young 3 to 4 orders of magnitude, about in 10 microradians or so.This is answered in military affairs
With having very important significance, because it is very difficult for capturing so narrow light beam, to substantially increase military logical
The confidentiality of letter.
2, very low to amount demand, several volts are only needed, using power supplied locally, and power supply mode is varied.
3, high data transmission rate.After being modulated demodulation to laser pulse, it is (per second that optic communication can provide up to 10Gbps
Kilomegabit) magnitude data transmission rate, significantly larger than current RF and microwave communication transmission speed.
4, low transmitting power, height receive power.For receiving end, square of power and Angle of beam divergence is effectively received
It is inversely proportional.Since the Angle of beam divergence of optic communication is much smaller than RF and microwave communication.Therefore, in identical situation, compared with
RF and microwave communication, optic communication can obtain higher reception power with smaller transmission power.
5, transmission capacity is big, and microwave frequency is substantially in several GHz to tens of GHz magnitudes, and the frequency of laser is substantially hundreds of
THz magnitude, the 3-5 order of magnitude higher than microwave, thus available much higher message transmission rate.
6, economy is strong, because only needing setting to relay, therefore the surcharges such as design, prospecting, engineering and circuit fee, it is more other
Such as transmission cost of satellite station, shortwave and every megabit of optical cable means is more economical.
That is, since free space optical communication also has, strong security, amount demand be low, low transmitting power, height
Power, the advantages that transmission capacity is big are received, the signal transmission performance of satellite communication system can be also further promoted, reduces energy consumption.
Preferably due to very low to amount demand using free space optical communication, several volts are only needed, using power supplied locally,
And power supply mode is varied.In the satellite communication equipment, also settable solar panel, during solar panel is
After offer power supply.In this way, even if relaying setting can also solve the electrical problem of each equipment in relaying in mountain top.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure
And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond the scope of this invention.
Claims (7)
1. a kind of satellite communication system characterized by comprising
Telecommunication satellite, relaying and communication terminal；Wherein, there is satellite communication link between the telecommunication satellite and the relaying,
There is relayed communications link between the relaying and the communication terminal；On the satellite communication link using radio wave into
Row communication, is communicated on the repeated link using free space optical.
2. satellite communication system according to claim 1, which is characterized in that the telecommunication satellite is positioned at equator overhead
Synchronous satellite.
3. satellite communication system according to claim 1, which is characterized in that the relaying includes: photoelectric converter, light hair
Penetrate machine and photoreceiver.
4. satellite communication system according to claim 3, which is characterized in that the photoreceiver includes the optical frames previous day
Line.
5. satellite communication system according to claim 4, which is characterized in that the optical sender include light emitting diode or
Laser diode.
6. satellite communication system according to claim 1, which is characterized in that when the quantity of the relaying is two with two
When above, communicated between the relaying using free space optical.
7. satellite communication system according to claim 1, which is characterized in that further include:
Solar panel, the solar panel provide power supply for the relaying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811307833.7A CN109257092A (en) | 2018-11-05 | 2018-11-05 | A kind of satellite communication system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811307833.7A CN109257092A (en) | 2018-11-05 | 2018-11-05 | A kind of satellite communication system |
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| CN109257092A true CN109257092A (en) | 2019-01-22 |
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| CN201811307833.7A Pending CN109257092A (en) | 2018-11-05 | 2018-11-05 | A kind of satellite communication system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112291001A (en) * | 2020-10-23 | 2021-01-29 | 军事科学院系统工程研究院网络信息研究所 | Electro-optical double-carrier mutual check free space communication method |
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| CN107017937A (en) * | 2016-01-27 | 2017-08-04 | 波音公司 | Satellite communication system |
| CN107395273A (en) * | 2016-05-17 | 2017-11-24 | 谷歌公司 | Acquisition and tracking equipment for free optic communication |
| CN108471327A (en) * | 2018-03-26 | 2018-08-31 | 广东工业大学 | A kind of UAV Communication system |
| CN108540228A (en) * | 2018-03-16 | 2018-09-14 | 广东工业大学 | Relay transmission system based on FSO/RF links and energy control method |
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2018
- 2018-11-05 CN CN201811307833.7A patent/CN109257092A/en active Pending
Patent Citations (6)
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| US20120308235A1 (en) * | 2011-05-31 | 2012-12-06 | Aoptix Technologies, Inc. | Integrated Commercial Communications Network Using Radio Frequency and Free Space Optical Data Communication |
| CN103117803A (en) * | 2013-01-25 | 2013-05-22 | 中国人民解放军空军工程大学 | Space-borne microwave and laser communication link integrating system and application method |
| CN107017937A (en) * | 2016-01-27 | 2017-08-04 | 波音公司 | Satellite communication system |
| CN107395273A (en) * | 2016-05-17 | 2017-11-24 | 谷歌公司 | Acquisition and tracking equipment for free optic communication |
| CN108540228A (en) * | 2018-03-16 | 2018-09-14 | 广东工业大学 | Relay transmission system based on FSO/RF links and energy control method |
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| CN112291001A (en) * | 2020-10-23 | 2021-01-29 | 军事科学院系统工程研究院网络信息研究所 | Electro-optical double-carrier mutual check free space communication method |
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Application publication date: 20190122 |