CN105553539B - A kind of inter-satellite Terahertz communication system framework and its information transferring method - Google Patents
A kind of inter-satellite Terahertz communication system framework and its information transferring method Download PDFInfo
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- CN105553539B CN105553539B CN201510946468.4A CN201510946468A CN105553539B CN 105553539 B CN105553539 B CN 105553539B CN 201510946468 A CN201510946468 A CN 201510946468A CN 105553539 B CN105553539 B CN 105553539B
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- terahertz
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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
- H04B7/18521—Systems of inter linked satellites, i.e. inter satellite service
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
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- Computer Networks & Wireless Communication (AREA)
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- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of inter-satellite Terahertz communication system frameworks, and including the transmitter and receiver being arranged on satellite platform, when Terahertz frequency range is the low-frequency range less than 10THz, the transmitter uses flood tide Terahertz antenna array；When high band of the Terahertz frequency range in 10THz~30THz, the transmitter is thz laser device；When Terahertz frequency range is above-mentioned low-frequency range or high band, the receiver is flood tide Terahertz antenna array；The flood tide Terahertz antenna array includes 104~107The bay of the order of magnitude, the flood tide Terahertz antenna array are made using semiconductor technology, and the bay by several work in different wave length is realized using the same technique, to realize multi-frequency MIMO system；The receiver will extract information after receiving THz wave by a detection quantum device, and drive the same detection quantum device using several bays.Present system framework has merged the advantages of infrared laser communication and millimetre-wave attenuator.
Description
Technical field
The present invention relates to a kind of novel transceiver architectures for intersatellite communication based on Terahertz frequency range.
Background technique
Traditional inter-satellite link relies primarily on microwave communication techniques and laser communication technology.In order to meet growing sky
Between between culminant star amount of communication data requirement, Microwave bandwidth is continuously improved, as a new generation of the U.S. military satellite communication system star between
The working frequency of link has reached 60GHz.But the huge problem that microwave communication faces is space link decaying, and communicated between star
Feature exactly overlength distance.Space laser communication modes due to laser coherence so that its compared with microwave substantially
There is no path attenuation.But the laser light beam divergence angle that long distance laser communication uses is very small, and space platform is high in practical applications
The optical emitting or receiving antenna that the laser space communication system being installed on platform is influenced whether up to the shake of tens of μ rad, make
It generates swing.It is this swing it is serious when laser space communication can be made to interrupt, the mistake of laser communication system can be made when more
Code rate increases, communication quality decline.Thus the characteristics of laser space communication, makes it in telecommunication in alignment and tracking
It is very harsh in the requirement of system.
Terahertz (THz) frequency range is higher than millimeter wave and is lower than LONG WAVE INFRARED, and band limits is in 0.3THz between 30THz
(wavelength 1mm~10 μm).Compared to microwave communication: 1) capacity of THz communications is bigger, several hundred much larger than microwave in bandwidth
Million bandwidth is able to carry out the communication of Gb/s magnitude；2) THz wave beam is narrower, directionality is more preferable, smaller target can be detected with
And it is more accurately located；3) THz wave has better confidentiality and anti-interference ability；4) since THz wave wavelength is relatively much shorter,
The size of antenna be can be made smaller in the case where completion said function, and other systems structure can also be made simpler, warp
Ji.Compared to laser communication: 1) photon energy of THz wave is about the 1/40 of visible light, the energy efficiency as information carrier
It is higher；2) THz wave has the ability for preferably penetrating sand and dust smog, and round-the-clock work may be implemented；3) field angle compares laser
Greatly, wave cover area is bigger, so that receiver can be received correctly in a certain range, relaxes acquisition and tracking
The requirement of APT expands the distance of communication.
Summary of the invention
The present invention proposes a completely new inter-satellite Terahertz communication framework: PHOTRONIC communication system.Its main feature is that melting
Closed infrared laser communication (photonics:PHOT) and millimetre-wave attenuator (electronics: ELEC ONICTRONIC) the advantages of.
In order to solve the above-mentioned technical problem, the invention proposes a kind of inter-satellite Terahertz communication system frameworks, including set
The transmitter and receiver on satellite platform is set, when Terahertz frequency range is the low-frequency range less than 10THz, the transmitting
Machine uses flood tide Terahertz antenna array；When high band of the Terahertz frequency range in 10THz~30THz, the transmitter is
Thz laser device；When Terahertz frequency range is above-mentioned low-frequency range or high band, the receiver is flood tide Terahertz day
Linear array；The flood tide Terahertz antenna array includes 104~107The bay of the order of magnitude, the flood tide Terahertz antenna array benefit
Made of semiconductor technology, by several work different wave length bay (because each Terahertz bay also by
Receive the sub-antenna array element composition of different wave length, such compound Terahertz bay recomposition Terahertz aerial array) benefit
It is realized with the same technique, to realize multi-frequency MIMO system；The receiver will be by an inspection after receiving THz wave
Wave quantum device extracts information, and drives the same detection quantum device using several bays.
The detection quantum device is based on plasma high electron mobility transistor.
It is using the method that inter-satellite Terahertz communication system framework of the present invention realizes information transmission: by information signal compression
It is modulated to electric signal after coding and loads on THz source, which is to form narrow beam through flood tide Terahertz antenna array
To external radiation or laser light source；Receiving end flood tide Terahertz antenna array is directed toward control (Beam Steering) in electron beam
Adjustment under, realize launching beam and receive wave beam alignment；The terahertz signal received quilt after quantum device detects
It is sent to the decoding decompression circuit of rear class, finally restores information signal.
It is less than the Terahertz low-frequency range of 10THz in frequency, transmitter uses flood tide Terahertz antenna array, utilizes antenna array
The technology that Wave beam forming is synthesized with energy realizes the high-power output of narrow beam with path attenuation of drawing up.In addition, the electricity of antenna array
Sub- scanning mode can quickly adjust beam direction, realize launching beam and received alignment.Receiver also uses flood tide antenna array, leads to
The resonance for crossing free electron in antenna array metal achievees the effect that energy accumulating and enhancing, and can be from the electromagnetic wave of various wavelength
In select required wavelength (as radio radio station select), realize single-frequency ' monochrome ' reception, other wavelength signals of drawing up
Interference.
In the Terahertz high band of 10THz~30THz (wavelength is 30 microns~10 microns), transmitter is swashed using modulation
Light, but receive by the way of flood tide antenna array.The elements such as the mechanical oscillation due to satellite platform cause the laser of transmitting with flat
Platform is swung at random, although there is hot spot swing in receiving end, receiving end is received using multiple flood tide antenna arrays.Each day
Linear array can be swept to by this laser beam, be equivalent to different antenna arrays different moments in time-domain and received laser signal.
Since electronic clock (GHz magnitude) is significantly faster than mechanical chattering frequency, so that electron process can be passed through after receiving signal
Mode the signal that these different antennae battle arrays receive is subjected to splicing synthesis, realize the reception of big data rate, overcome tradition
The shortcomings that transmission data rate reduces caused by laser communication is swung due to hot spot.Further, since communication does not need coherence, it can
To alleviate the pressure of alignment, so that the requirement of geometry and relative physical location for antenna array is not so harsh, institute
Many flood tide antenna arrays can be stacked up during lift-off.Arrived it is reinflated after space, to expand antenna array
Equivalent bore.
It, can be by several work in difference since the flood tide antenna array proposed is made using semiconductor technology
The bay of wavelength is realized using the same technique.Namely realize the reception of multi-frequency.It can thus use more
The multi input of frequency receives and multi-frequency emits and multi-frequency MIMO system.
Antenna will extract information by way of quantum device direct detection after receiving THz wave.In order to improve quantum device
The receiving efficiency of part, can be using multiple element antennas come by the way of driving the same quantum device.
Detection quantum device can be based on plasma high electron mobility transistor (Plasmonic HEMT).The device
Class surface plasmons on Terahertz metal antenna is introduced into Plasmonic-HEMT of the channel length less than 100nm
Grid, since grid groove size and the mean free path of electronics can compare, the momentum relaration time is longer than the transition time of electronics,
Ballistic transport controls the electron motion between source and drain.HEMT is under the conditions of applying bias is formed by nonsymmetry boundary, channel
The electronic fluid of interior original stable will become unstable.Due to the transmitting between source and drain so that unstable electronic fluid is relevant puts
It is big to form plasma resonance.The velocity of wave of the plasma formed in so short short channel HEMT can achieve 108cm/s
More than, the electron drift velocity in significantly larger than common HEMT.Using Plasmonic HEMT there are many advantages of, first, etc.
Ion velocity of wave propagation is fast, overcomes the too slow disadvantage of traditional thermal detector response speed；Second, in scene effect transistor,
Higher channel electrons concentration can be obtained, and this can be further improved the frequency of plasma oscillation；Third, plasma
The frequency of resonance increases with the reduction of field effect transistor grid length, can increase investigative range by changing grid length；4th,
Plasma resonance can realize there is the subband of high response rate relative to refrigerating plant is needed to reach extremely low temperature just at room temperature
For transition quantum well structure terahertz detector, there is great advantage using field effect transistor.
Detailed description of the invention
Fig. 1 is PHOTRONIC communication architecture schematic diagram of the invention.
Fig. 2 is that Terahertz high band receives the receipts for being combined PHEMT detection realized using Laser emission with flood tide antenna array
Send out system example.
Specific embodiment
Technical solution of the present invention is described in further detail in the following with reference to the drawings and specific embodiments, it is described specific
Embodiment is only explained the present invention, is not intended to limit the invention.
It is as shown in Figure 1 system structure diagram of the invention.The basic principle of information transmission are as follows: information letter to be transmitted
Number by compressed encoding and modulation after, load on THz source, THz source can be through flood tide antenna formed narrow beam to
External radiation is also possible to laser light source；Flood tide antenna array is received under the adjustment that electron beam is directed toward control, it is huge to complete sending and receiving receipts
The alignment of Terahertz antenna array is measured, keeps the signal power received maximum, efficiency of transmission reaches highest.The terahertz signal received
It is sent to the decoding decompression circuit of rear class after the detection of quantum electronics device, restores information signal.Carry out Terahertz
The satellite 1 and satellite 2 of communication have same transceiver architecture.
It is illustrated in figure 2 the present invention and PHEMT is combined with the reception of flood tide antenna array using Laser emission in Terahertz high band
Detect realized receive-transmit system example.Information signal to be transmitted is after compressed encoding and modulation, by the electric signal of modulation
Load is emitted in thz laser device；Flood tide antenna array is received under the adjustment that electron beam is directed toward control, completes sending and receiving
The alignment of flood tide Terahertz antenna array is received, keeps the signal power received maximum, efficiency of transmission reaches highest, the Terahertz received
Signal is sent to the decoding decompression circuit of rear class after this quantum electronics sensitive detection parts of Plasmonic HEMT, reduction
Information signal out.Because being all slow for the clock (GHz magnitude) of mechanical vibration (millisecond magnitude) corresponding electronic equipment
Variable quantities can make sending and receiving receive the realization alignment of flood tide antenna array within the time of very section in such a way that electronics adjusts wave beam.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvements and modifications can also be made, but these are improved and profit
Decorations also should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of inter-satellite Terahertz communication system, including the transmitter and receiver being arranged on satellite platform, feature exists
In:
When Terahertz frequency range is the low-frequency range less than 10THz, the transmitter uses flood tide Terahertz antenna array；
When high band of the Terahertz frequency range in 10THz~30THz, the transmitter is thz laser device；
When Terahertz frequency range is above-mentioned low-frequency range or high band, the receiver is flood tide Terahertz antenna array；
The flood tide Terahertz antenna array includes 104~107The bay of the order of magnitude, the flood tide Terahertz antenna array benefit
It is made of semiconductor technology, the bay by several work in different wave length is realized using the same technique, thus real
Existing multi-frequency MIMO system；
The receiver will extract information after receiving THz wave by a detection quantum device, and use several bays
Drive the same detection quantum device.
2. a kind of inter-satellite Terahertz communication system according to claim 1, it is characterised in that: the detection quantum device is
High electron mobility field-effect transistor based on plasmon.
3. a kind of information transferring method of inter-satellite Terahertz communication system, which is characterized in that using such as claims 1 or 2 institute
The inter-satellite Terahertz communication system stated realizes that the step of information is transmitted is: being modulated to telecommunications after information signal compression is encoded
Number and load on THz source, which is that narrow beam is formed through flood tide Terahertz antenna array to external radiation or laser
Light source；Receiving end flood tide Terahertz antenna array is realized under the adjustment that electron beam is directed toward control and receives wave beam and launching beam
Alignment；The terahertz signal received is sent to the decoding decompression circuit of rear class after quantum device detects, final to go back
Original goes out information signal.
4. the information transferring method of inter-satellite Terahertz communication system according to claim 3, which is characterized in that small in frequency
In the Terahertz low-frequency range of 10THz, transmitter uses flood tide Terahertz antenna array, is closed using antenna array beamforming and energy
At the high-power output of realization narrow beam to inhibit path attenuation；The electron scanning mode tune beam direction of antenna array realizes hair
Ejected wave beam and received alignment；Receiving end reaches energy accumulating and enhancing by the resonance of free electron in antenna array metal, and
Required wavelength is selected from the electromagnetic wave of various wavelength, and inhibits the interference of other wavelength signals.
5. the information transferring method of inter-satellite Terahertz communication system according to claim 3, which is characterized in that in 10THz
~30THz, the Terahertz high band that wavelength is 30 microns~10 microns, transmitter is using thz laser device for emitting modulation
Laser；Receiving end is received using multiple flood tide Terahertz antenna arrays, each antenna array is swept to by laser light source, no
With antenna array in time-domain different moments receive laser signal, receive this after signal by way of electron process
The signal that a little different antennae battle arrays receive carries out splicing synthesis.
6. the information transferring method of inter-satellite Terahertz communication system according to claim 5, which is characterized in that in satellite liter
In null process, many flood tide antenna arrays are stacked up, flood tide antenna array is unfolded again after having arrived space for satellite, to expand day
The equivalent bore of linear array.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021159204A1 (en) * | 2020-02-11 | 2021-08-19 | Reflex Photonics Inc. | Methods, devices, and architectures for inter-spacecraft optical communication |
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| US10374696B2 (en) * | 2016-12-29 | 2019-08-06 | Facebook, Inc. | Bidirectional satellite communications |
| CN107769800B (en) * | 2017-09-14 | 2019-12-27 | 天津大学 | Multi-frequency point terahertz inter-satellite communication receiver |
| CN107911165B (en) * | 2017-11-02 | 2020-06-26 | 同济大学 | Wireless communication device based on distributed optical resonant cavity |
| CN108400432A (en) * | 2018-02-20 | 2018-08-14 | 顾士平 | Semiconductor wireless transmission, reception antenna |
| CN110957993B (en) * | 2018-09-27 | 2023-07-14 | 天津大学青岛海洋技术研究院 | Terahertz full 360-degree reflection type phase shifter based on SiGe process |
| CN111130615B (en) * | 2018-10-30 | 2021-06-22 | 华为技术有限公司 | APT subsystem and communication system of spacecraft |
| CN111817756B (en) * | 2020-06-16 | 2022-05-24 | 西安空间无线电技术研究所 | Terahertz communication beam backtracking device and method |
| CN113346940B (en) * | 2021-06-01 | 2023-03-28 | 中国电子科技集团公司第五十四研究所 | Terahertz communication system applicable to low-earth-orbit satellites |
| CN113466166A (en) * | 2021-07-08 | 2021-10-01 | 清华大学 | Gas terahertz spectrum detection system |
| CN115189754B (en) * | 2022-07-08 | 2024-04-09 | 中国电子科技集团公司第五十四研究所 | Antenna alignment supplementing method based on terahertz communication between co-orbit satellites |
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