CN108667531A - Terahertz wireless signal sending device, reception device, communication system and method - Google Patents
Terahertz wireless signal sending device, reception device, communication system and method Download PDFInfo
- Publication number
- CN108667531A CN108667531A CN201810348351.XA CN201810348351A CN108667531A CN 108667531 A CN108667531 A CN 108667531A CN 201810348351 A CN201810348351 A CN 201810348351A CN 108667531 A CN108667531 A CN 108667531A
- Authority
- CN
- China
- Prior art keywords
- carrier
- optical
- signal
- roads
- terahertz
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- H04B10/90—Non-optical transmission systems, e.g. transmission systems employing non-photonic corpuscular radiation
Abstract
Include transmitter an embodiment of the present invention provides a kind of Terahertz wireless signal sending device, reception device, communication system and method, sending device, transmitter includes：N number of optical modulator, optical combiner, image intensifer, optical mixer unit and antenna element；Reception device includes receiver, and receiver includes N number of receiving module, and each receiving module includes low-noise amplifier, low-converter, digital signal processing unit；Communication system includes transmitter and receiver.Communication means includes：N number of optical modulator receives N road optical carriers and modulates；Optical combiner receives modulated signal and is multiplexed to an optical fiber with reference to optical carrier；Optical carrier after image intensifer amplification combining；Amplified optical carrier is converted to the modulated signal of Terahertz frequency range by optical mixer unit；Antenna element receives and emits the modulated signal of Terahertz frequency range.The embodiment of the present invention can improve the traffic rate of Terahertz communicating wireless signals system entirety.
Description
Technical field
The present invention relates to wireless communication technology fields, more particularly to a kind of Terahertz wireless signal sending device, receive
Device, communication system and method.
Background technology
With the maturation of 4G mobile communication technologies and the continuous development of mobile communication system, low-frequency range frequency spectrum resource is further tight
It lacks, existing communications band and technology are increasingly difficult to meet growing business demand.And in millimeter wave and Terahertz frequency
Section, still has a large amount of idle frequency spectrum resource at present, these frequency spectrum resources to provide tens of Gigabits or even lucky ratio up to a hundred
Special wireless communication rate service is possibly realized.For millimeter wave frequency band, although the frequency used compared to Current wireless communication system
Spectrum, idle frequency spectrum resource is relatively large, but even if if 60GHz and 70~95GHz frequency ranges only free time of 7~9GHz
Bandwidth is available, still can not support superelevation rate.
THz waves (THz wave) refer to comprising the electromagnetic wave that frequency is 0.1~10THz.Terahertz frequency range is generally configured with number
The available bandwidth of ten GHz, it means that the superelevation transmission rate of tens of to up to a hundred gigabits can be provided, THz waves can be utilized
The characteristics of, manufacture the wireless communication system based on THz waves.
Current Terahertz wireless communication system is usually photoelectricity combination system, and generally use is based on electrooptical device
Terahertz sources machine and the receiver manufactured based on electronic device.And the receiver of electronic device is limited by circuit element, circuit
Design and the influence of manufacturing process, receiver tends not to the very big of manufacture, thus bandwidth of operation is usually less than the work of transmitting terminal
Make bandwidth.Existing Terahertz communication system receives terahertz signal using electronic receiver, although based on photoelectron technology
Transmitter has larger bandwidth of operation and Very-High-Data-Rate ability, but is constrained to the work of receiving terminal electronic receiver device
The traffic rate of bandwidth, communication system entirety is still to be improved.
Invention content
The embodiment of the present invention is designed to provide a kind of Terahertz wireless signal sending device, reception device, communication system
System and method, to realize the traffic rate for improving Terahertz communicating wireless signals system entirety.Specific technical solution is as follows：
In a first aspect, an embodiment of the present invention provides a kind of Terahertz wireless signal sending device, described device includes hair
Machine is penetrated, the transmitter includes：N number of optical modulator, optical combiner, image intensifer, optical mixer unit and antenna element, the N are
Integer more than 1；
N number of optical modulator receives the roads N optical carrier for corresponding, and the roads N optical carrier is adjusted
It is transmitted after system；
The optical combiner, for receiving the modulated roads N optical carrier, by the modulated roads N optical carrier with
It is transmitted in multiplexing a to optical fiber after being combined with reference to optical carrier；
The image intensifer amplifies the optical carrier after the combining for receiving the optical carrier after being combined
It is transmitted afterwards by optical fiber；
The optical mixer unit converts the amplified optical carrier for receiving amplified optical carrier
For Terahertz frequency range modulated signal and be transmitted；
The antenna element, the modulated signal for receiving the Terahertz frequency range, and emit the Terahertz frequency range
Modulated signal.
Second aspect, an embodiment of the present invention provides a kind of Terahertz wireless signal receiver, described device includes connecing
Receipts machine, the receiver include N number of receiving module, and each receiving module is used to receive and process the terahertz of transmitter transmission
Hereby carrier signal one of in frequency range modulated signal；The N is the integer more than 1；The receiving module includes：Low noise
Amplifier, low-converter, digital signal processing unit；
The low-noise amplifier, for being amplified processing to received carrier signal；
The low-converter, for carrying out down-converted to the carrier signal after enhanced processing；
The digital signal processing unit obtains number for treated that carrier signal is handled to downconverted
Baseband signal.
The third aspect, an embodiment of the present invention provides a kind of Terahertz communicating wireless signals systems, including：As the present invention is real
Apply the Terahertz wireless signal sending device described in a first aspect and the Terahertz as described in second aspect of the embodiment of the present invention
Wireless signal receiver.
Fourth aspect, the embodiment of the present invention, which carries, has also supplied a kind of Terahertz wireless signal sending device, described device to include
Transmitter, the transmitter include：N number of optical modulator, optical combiner, image intensifer, optical branching device, N number of polarization-maintaining photo-coupler,
N number of optical mixer unit and N number of antenna element；The N is the integer more than 1；
N number of optical modulator receives the roads N optical carrier for corresponding, and the roads N optical carrier is adjusted
It is transmitted after system；
The optical combiner, for receiving the modulated roads N optical carrier, by the modulated roads N optical carrier with
It is transmitted in multiplexing a to optical fiber after being combined with reference to optical carrier；
The image intensifer amplifies the optical carrier after the combining for receiving the optical carrier after being combined
It is transmitted afterwards by optical fiber；
The optical branching device detaches the amplified optical carrier for receiving amplified optical carrier
It is transmitted with reference to optical carrier and respectively at the light modulating signal of the roads N difference carrier wave and one；
N number of polarization-maintaining photo-coupler refers to optical carrier for the light modulating signal after detaching every road with described
It is coupled；
N number of optical mixer unit receives the optical carrier after the roads N couple, the light after the roads N are coupled for corresponding
Carrier signal, corresponding conversion are the single-carrier modulated signal of the roads N Terahertz frequency range and are transmitted；
N number of antenna element, for the corresponding single-carrier modulated signal received and emit the roads N Terahertz frequency range.It is described
Antenna element receives the modulated signal of the Terahertz frequency range, and emits the modulated signal of the Terahertz frequency range, including：It is described
N number of antenna element in antenna element corresponds to the single-carrier modulated signal for receiving and emitting the roads N Terahertz frequency range.
5th aspect, the embodiment of the present invention additionally provide a kind of Terahertz wireless signal receiver, and described device includes N
A receiver, each receiver are used to receive and process transmitter transmission, the roads N Terahertz frequency range single-carrier modulated letter
Wherein signal all the way in number；The N is the integer more than 1；The receiver includes：Low-noise amplifier, low-converter, number
Word signal processing unit；
The low-noise amplifier, for being amplified processing to the single-carrier signal received；
The low-converter, for carrying out down-converted to the single-carrier signal after enhanced processing；
The digital signal processing unit is counted for treated that single-carrier signal is handled to downconverted
Word baseband signal.
6th aspect, the embodiment of the present invention additionally provide a kind of Terahertz communicating wireless signals system, including：Such as the present invention
Terahertz wireless signal sending device described in embodiment fourth aspect and the terahertz as described in terms of the embodiment of the present invention the 5th
Hereby wireless signal receiver.
7th aspect, an embodiment of the present invention provides a kind of communication means of Terahertz wireless signal, the method includes：
N number of optical modulator, which corresponds to, receives the roads N optical carrier, and is transmitted after the roads N optical carrier is modulated；
Optical combiner receives the modulated roads N optical carrier, by the modulated roads N optical carrier and refers to light carrier
It is transmitted in multiplexing a to optical fiber after signal combining；
Image intensifer receives the optical carrier after combining, will pass through optical fiber after the optical carrier amplification after the combining
It is transmitted；
Optical mixer unit receives amplified optical carrier, and the amplified optical carrier is converted to Terahertz frequency
The modulated signal of section is simultaneously transmitted；
Antenna element receives the modulated signal of the Terahertz frequency range, and emits the modulated signal of the Terahertz frequency range；
N number of receiving module of receiver receives and processes wherein one in the Terahertz frequency range modulated signal of transmitter transmission
A carrier signal, the N are the integer more than 1.
Optionally, N number of receiving module of the receiver receives and processes the Terahertz frequency range modulation letter of transmitter transmission
Carrier signal one of in number, including：
For N number of receiving module of the receiver, the low-noise amplifier in each receiving module is to received carrier wave
Signal is amplified processing；
Low-converter in each receiving module carries out down-converted to the carrier signal after enhanced processing；
Treated that carrier signal is handled to downconverted for digital signal processing unit in each receiving module, obtains
To digital baseband signal.
Eighth aspect, the embodiment of the present invention carry the communication means for also having supplied a kind of Terahertz wireless signal, the method packet
It includes：
N number of optical modulator, which corresponds to, receives the roads N optical carrier, and is transmitted after the roads N optical carrier is modulated；
Optical combiner receives the modulated roads N optical carrier, by the modulated roads N optical carrier and refers to light carrier
It is transmitted in multiplexing a to optical fiber after signal combining；
Image intensifer receives the optical carrier after combining, will pass through optical fiber after the optical carrier amplification after the combining
It is transmitted；
Optical branching device receives amplified optical carrier, and the amplified optical carrier is separated into N number of difference
The light modulating signal of carrier wave and a reference optical carrier are simultaneously transmitted respectively；
N number of polarization-maintaining photo-coupler couples the light modulating signal after each separation with described with reference to optical carrier；
N number of optical mixer unit, which corresponds to, receives the optical carrier after the roads N couple, the optical carrier after the roads N are coupled,
Corresponding conversion is the single-carrier modulated signal of the roads N Terahertz frequency range and is transmitted；
N number of antenna element in the antenna element corresponds to the single carrier tune for receiving and emitting the roads N Terahertz frequency range
Signal processed；
N number of antenna element corresponds to the single-carrier modulated signal for receiving and emitting the roads N Terahertz frequency range；
N number of receiver corresponds to the single-carrier modulated signal for receiving and processing the roads the N Terahertz frequency range transmitted by transmitter, institute
It is the integer more than 1 to state N.
Optionally, N number of receiver corresponds to the single carrier for receiving and processing the roads the N Terahertz frequency range transmitted by transmitter
Modulated signal, including：
For N number of receiver, the low-noise amplifier in each receiver, to the roads the N Terahertz frequency range received
Single-carrier modulated signal wherein signal is amplified processing all the way；
Low-converter in each receiver to after enhanced processing wherein single-carrier modulated signal carries out lower change all the way
Frequency is handled；
Treated that wherein single-carrier modulated is believed all the way to downconverted for digital signal processing unit in each receiver
It number is handled, obtains digital baseband signal.
A kind of Terahertz wireless signal sending device, reception device, communication system and method provided in an embodiment of the present invention,
By the way that N number of receiving module is arranged in the receiver of communication system, each receiving module can receive and process transmitter hair
Carrier signal one of in the Terahertz frequency range modulated signal sent, so as to use multiple script relative bandwidths relatively narrow
Receives link carries out parallel received signals, significantly improves data throughout, improves the traffic rate of communication system entirety.
Another kind Terahertz wireless signal sending device, reception device, communication system and side provided in an embodiment of the present invention
Method, the single-carrier modulated signal of the roads N Terahertz frequency range is emitted by N number of antenna element of transmitter, and multiple receivers is made to connect
The wherein signal all the way in the single-carrier modulated signal of the roads N Terahertz frequency range is received and handled, multiple relatively narrow bandwidths can be directed to
Receiver, make full use of the bandwidth of transmitter, improve entire point (transmitting terminal) arrive multiple spot (receiving terminal) system capacity.When
So, it implements any of the products of the present invention or method must be not necessarily required to reach all the above advantage simultaneously.
Description of the drawings
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 technology 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
Obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of structural schematic diagram of Terahertz communicating wireless signals device provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of Terahertz wireless signal sending device provided in an embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of Terahertz wireless signal receiver provided in an embodiment of the present invention；
Fig. 4 is a kind of flow diagram of Terahertz wireless signal sending method provided in an embodiment of the present invention；
Fig. 5 is a kind of flow diagram of Terahertz radio signal receiving method provided in an embodiment of the present invention；
Fig. 6 is a kind of flow diagram of Terahertz communicating wireless signals method provided in an embodiment of the present invention；
Fig. 7 is another flow diagram of Terahertz communicating wireless signals method provided in an embodiment of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a kind of Terahertz wireless signal sending devices, as shown in Figure 1, include transmitter 100,
Transmitter 100 includes：N number of optical modulator 101, optical combiner 102, image intensifer 103, optical mixer unit 105 and antenna element
106.Wherein, N is the integer more than 1.
N number of optical modulator 101 receives the roads N optical carrier for corresponding, and after the roads N optical carrier is modulated
Transmission can carry different information per optical carrier all the way.
As a kind of optional embodiment of the embodiment of the present invention, N number of optical modulator 101 specifically can be used for：Correspondence connects
Receiving the roads N has the optical carrier of different wave length, is transmitted after the roads N optical carrier is modulated, wherein modulated each road
The signal bandwidth of optical carrier, the frequency interval being less than between optical carrier of the roads N with different wave length, to the roads Shi Ge light
The frequency spectrum of carrier signal is not overlapped.
Optical combiner 102, for receiving the modulated roads N optical carrier, by the modulated roads N optical carrier and ginseng
After examining optical carrier combining, it is transmitted in multiplexing a to optical fiber.In the embodiment of the present invention, with reference to optical carrier and its
Difference on the frequency between his roads N light carrier can be the frequency of the terahertz carrier signal of each road transmission, that is, can be by adjusting two
The difference on the frequency of road light source obtains desired Terahertz frequency.
Image intensifer 103 will pass through for receiving the optical carrier after being combined after the optical carrier amplification after combining
Optical fiber 104 is transmitted.
Amplified optical carrier is converted to terahertz by optical mixer unit 105 for receiving amplified optical carrier
Hereby the modulated signal of frequency range and it is transmitted.It should be noted that the optical mixer unit in the embodiment of the present invention can be existing
Optical mixer unit.The modulated signal for the Terahertz frequency range that optical mixer unit 105 generates, can be multi-carrier signal.Optical mixer unit is for example
Can be UTC-PD (Uni-Traveling-Carrier Photodiode, Unidirection Carrier Photodiode).
Antenna element 106, the modulated signal for receiving Terahertz frequency range, and emit the modulated signal of Terahertz frequency range.
The modulated signal for the Terahertz frequency range that optical mixer unit 105 generates, can cover the antenna list of multi-carrier signal total bandwidth with feed-in
Member 106, and free space is radiated to by antenna element 106, to emit the modulated signal of Terahertz frequency range.
The Terahertz wireless signal sending device of the embodiment of the present invention, by after the roads N optical carrier is modulated respectively with
It is signal all the way with reference to optical carrier combining, through enhanced processing, the modulated signal for being reconverted into Terahertz frequency range is emitted,
The modulated signal of the Terahertz frequency range emitted can be multi-carrier signal, to improve bandwidth availability ratio；Also, it is reducing
In the case that receiver device is to bandwidth requirement, the capacity that point (transmitting terminal) arrives point (receiving terminal) link is improved.
The embodiment of the present invention additionally provides a kind of Terahertz wireless signal receiver, as shown in Figure 1, including receiver
200.Wherein, receiver 200 includes N number of receiving module, and N is the integer more than 1.Each receiving module may include：Low noise
Amplifier 201, low-converter 202, digital signal processing unit 203, each receiving module can be used for receiving and processing transmitting
Carrier signal one of in the Terahertz frequency range modulated signal that machine is sent, and the signal is handled.
As a kind of specific embodiment of the embodiment of the present invention, above-mentioned low-noise amplifier 201 can be used for being connect
It receives carrier signal and is amplified processing.
Above-mentioned low-converter 202 can be used for carrying out down-converted to the carrier signal after enhanced processing.
Above-mentioned digital signal processing unit 203, can be used for downconverted that treated that carrier signal is handled, and obtain
To digital baseband signal.
Terahertz wireless signal receiver provided in an embodiment of the present invention, receiver include multiple receiving modules, often
A receiving module can receive one of modulated signal of Terahertz frequency range carrier signal, that is, using N number of original list
Receiver when carrier wave with respect to the receives link of narrower bandwidth composition is received parallel, to significantly improve handling capacity.
The embodiment of the present invention additionally provides a kind of Terahertz communicating wireless signals system, as shown in Figure 1, including Terahertz without
Line sender unit and Terahertz wireless signal receiver, wherein Terahertz wireless signal sending device is used for terahertz
Hereby wireless signal receiver sends Terahertz frequency range modulated signal；Terahertz wireless signal receiver, for receiving terahertz
Hereby frequency range modulated signal.
Terahertz communicating wireless signals system provided in an embodiment of the present invention, in the transmitter of communication system, by by the roads N
Optical carrier is combined with reference optical carrier after modulating respectively and is reconverted into Terahertz through enhanced processing for signal all the way
The modulated signal of frequency range is emitted, and the modulated signal of the Terahertz frequency range emitted can be multi-carrier signal, to improve
Bandwidth availability ratio；By the way that N number of receiving module is arranged in the receiver of communication system, each receiving module can receive simultaneously
Carrier signal one of in the Terahertz frequency range modulated signal that processing transmitter is sent, so as to use multiple script phases
Parallel received signals are carried out to the receives link of narrower bandwidth, significantly improve data throughout, improve the logical of communication system entirety
Believe rate.
The embodiment of the present invention additionally provides a kind of Terahertz wireless signal sending device, as shown in Fig. 2, including transmitter
100, transmitter 100 includes：N number of optical modulator 101, optical combiner 102, image intensifer 103, optical branching device 107, N number of polarization-maintaining
Photo-coupler 108, N number of optical mixer unit 105 and N number of antenna element 106.Wherein, N is the integer more than 1.
N number of optical modulator 101 receives the roads N optical carrier for corresponding, and the roads N optical carrier is adjusted
It is transmitted after system.
Optical combiner 102, for receiving the modulated roads N optical carrier, by the modulated roads N optical carrier and ginseng
It examines and is transmitted in multiplexing a to optical fiber after optical carrier is combined.
Image intensifer 103 is used for image intensifer, for receiving the optical carrier after being combined, by the light after the combining
It is transmitted by optical fiber after carrier signal amplification.
Amplified optical carrier is separated into N number of by optical branching device 107 for receiving amplified optical carrier
The light modulating signal of different carrier waves and a reference optical carrier are simultaneously transmitted respectively.Inventor has found, when needing to send
When the terahertz wave signal of different carrier waves, first multiple carrier signals can be combined, believed by the multiple carrier waves of a line transmission
Number, after optical fiber transmits, then in antenna vicinity branch, multiple signals can be transmitted by not needing a plurality of circuit, to save line
Material usage amount can also avoid the maintenance cost caused by circuit is excessive from increasing.
N number of polarization-maintaining photo-coupler 108, for the light modulating signal after each separation to be carried out coupling with reference to optical carrier
It closes.
N number of optical mixer unit 105 receives the optical carrier after the roads N couple, the light after the roads N are coupled for corresponding
Carrier signal, corresponding conversion are the single-carrier modulated signal of the roads N Terahertz frequency range and are transmitted.
N number of antenna element 106, for the corresponding single-carrier modulated signal received and emit the roads N Terahertz frequency range.
The Terahertz wireless signal sending device of the embodiment of the present invention, by by the roads N optical carrier and with reference to light carrier
After signal combining, amplification, optical fiber transmission, then branch is the roads N optical carrier and refers to optical carrier, and will be carried per light all the way
Wave signal is coupled with reference to optical carrier, and then the single of Terahertz frequency range that be converted into per signal all the way after coupling is carried
Wave modulated signal emits via each antenna element.Each antenna element can emit the single carrier tune of Terahertz frequency range all the way
Signal processed can be directed to the receiver of multiple relatively narrow bandwidths, fully profit to improve the transmitted in parallel ability of THz wave
With the bandwidth of transmitter, the capacity that entire point (transmitting terminal) arrives multiple spot (receiving terminal) system is improved.
The embodiment of the present invention additionally provides a kind of Terahertz wireless signal receiver, as shown in figure 3, including：N number of reception
Machine 200, each receiver 200 are used to receive and process in transmitter transmission, the roads N Terahertz frequency range single-carrier modulated signal
Wherein signal all the way；The N is the integer more than 1；Each receiver 200 includes：Low-noise amplifier 201, low-converter
202, digital signal processing unit 203；
Low-noise amplifier 201, for being amplified processing to the single-carrier signal received.
Low-converter 202, for carrying out down-converted to the single-carrier signal after enhanced processing.
Digital signal processing unit 203 obtains number for treated that single-carrier signal is handled to downconverted
Baseband signal.
In the embodiment of the present invention, each receiver can be regarded as a receiving module in Fig. 1 embodiments, for receiving
The wherein signal all the way of transmitting terminal transmitting.
The Terahertz wireless signal receiver of the embodiment of the present invention, multiple receivers receive and process the roads N Terahertz frequency
Wherein signal all the way in the single-carrier modulated signal of section can be directed to the receiver of multiple relatively narrow bandwidths, make full use of hair
The bandwidth for penetrating machine improves the capacity that entire point (transmitting terminal) arrives multiple spot (receiving terminal) system.
The embodiment of the present invention additionally provides a kind of Terahertz communicating wireless signals system, including Terahertz shown in Fig. 2 without
Line sender unit and Terahertz wireless signal receiver shown in Fig. 3.
Terahertz communicating wireless signals system provided in an embodiment of the present invention emits N by N number of antenna element of transmitter
The single-carrier modulated signal of road Terahertz frequency range, and multiple receivers is made to receive and process the single carrier tune of the roads N Terahertz frequency range
Wherein signal all the way in signal processed can be directed to the receiver of multiple relatively narrow bandwidths, make full use of the bandwidth of transmitter, carry
High entire point (transmitting terminal) arrives the capacity of multiple spot (receiving terminal) system.For the embodiment of the present invention photoelectricity combine Terahertz without
Line communication system, the embodiment of the present invention solve how under the limitation of the bandwidth of operation of all-electronin receiver, thus breakthrough is led
The rate limit of the Radio Link of cause gives full play to the broadband based on photoelectronic transmitter and the advantage of high speed, further carries
Bloom is electrically coupled the transmission rate and power system capacity of Terahertz communication system.Compared to single carrier Terahertz wireless communication system,
Advantage is：
1. under the bandwidth of operation limitation of current electronic receiver, photoelectricity combination Terahertz communication system can be increased exponentially
The wireless transmission rate and power system capacity of system.
2. in high speed Terahertz communication system, the requirement to electronic receiver device bandwidth of operation is reduced.
The embodiment of the present invention additionally provides a kind of Terahertz wireless signal sending method, as shown in figure 4, including：
S301, N number of optical modulator, which corresponds to, receives the roads N optical carrier, and is passed after the roads N optical carrier is modulated
It is defeated.
Above-mentioned light modulation process can specifically include：Optical carrier is modulated, to control the strong of output signal
The parameters such as degree, refractive index, absorptivity, amplitude or phase.It is modulated as a kind of optional embodiment of the embodiment of the present invention
The signal bandwidth of each road optical carrier, the frequency interval being less than between optical carrier of the roads N with different wave length are each to make
The frequency spectrum of road optical carrier is not overlapped.
S302, optical combiner receive the modulated roads N optical carrier, by the modulated roads N optical carrier and reference
It is transmitted in multiplexing a to optical fiber after optical carrier combining.
Optical combiner can be multiplexed by the roads N optical carrier and with reference to optical carrier into an optical fiber, to reduce
Number of, lines reduces the lower deployment cost of system.
S303, image intensifer receive the optical carrier after combining, will pass through light after the optical carrier amplification after combining
Fibre is transmitted.
The principle of image intensifer is substantially based on the stimulated radiation of laser, by being signal by the energy conversion of pump light
The energy of light realizes amplification, to the energy of optical carrier, increases the transmission range of optical carrier.
S304, optical mixer unit receive amplified optical carrier, amplified optical carrier are converted to Terahertz
The modulated signal of frequency range is simultaneously transmitted.
In the embodiment of the present invention, the optical carrier of modulation can be converted to the modulation letter of Terahertz frequency range by optical mixer unit
Number.It should be noted that the optical mixer unit in the embodiment of the present invention can be existing optical mixer unit.Optical mixer unit for example can be with
For UTC-PD (Uni-Traveling-Carrier Photodiode, Unidirection Carrier Photodiode).
S305, antenna element receive the modulated signal of Terahertz frequency range, and emit the modulated signal of Terahertz frequency range.Its
In, N is the integer more than 1.
The modulated signal of Terahertz frequency range can with feed-in one can cover the antenna of multi-carrier signal total bandwidth, and pass through day
Line unit is radiated to free space, to emit the modulated signal of Terahertz frequency range.
The Terahertz wireless signal sending method of the embodiment of the present invention, by after the roads N optical carrier is modulated respectively with
It is signal all the way with reference to optical carrier combining, through enhanced processing, the modulated signal for being reconverted into Terahertz frequency range is emitted,
The modulated signal of the Terahertz frequency range emitted can be multi-carrier signal, to improve bandwidth availability ratio.
The embodiment of the present invention additionally provides a kind of Terahertz radio signal receiving method, including：N number of reception mould of receiver
Block receive and process transmitter transmission Terahertz frequency range modulated signal in one of carrier signal；Wherein, N is more than 1
Integer.Optionally, as shown in figure 5, above-mentioned method of reseptance is specifically as follows：
S401, the low-noise amplifier in each receiving module are amplified processing to received carrier signal.
Low-noise amplifier can amplify received carrier signal, to improve the signal-to-noise ratio of signal output.
S402, the low-converter in each receiving module carry out down-converted to the carrier signal after enhanced processing.
Carrier signal can be carried out down coversion by low-converter, and to reduce signal frequency, existing lower change may be used
Frequency device handles the carrier signal after enhanced processing.
S403, digital signal processing unit in each receiving module to downconverted treated carrier signal at
Reason, obtains digital baseband signal.
Digital signal processing unit can treated that carrier signal is handled to downconverted, to obtain through lower change
Frequently carrier signal that treated, may be used existing digital signal processing chip and is handled.
Terahertz radio signal receiving method provided in an embodiment of the present invention, receiver include multiple receiving modules, often
A receiving module can receive one of modulated signal of Terahertz frequency range carrier signal, that is, using N number of original list
Receiver when carrier wave with respect to the receives link of narrower bandwidth composition is received parallel, to significantly improve handling capacity.
The embodiment of the present invention additionally provides a kind of Terahertz communicating wireless signals method, as shown in fig. 6, including：
Signal forwarding step：
S501, N number of optical modulator, which corresponds to, receives the roads N optical carrier, and is passed after the roads N optical carrier is modulated
It is defeated.
S502, optical combiner receive the modulated roads N optical carrier, by the modulated roads N optical carrier and reference
It is transmitted in multiplexing a to optical fiber after optical carrier combining.
S503, image intensifer receive the optical carrier after combining, will pass through light after the optical carrier amplification after combining
Fibre is transmitted.
S504, optical mixer unit receive amplified optical carrier, amplified optical carrier are converted to Terahertz
The modulated signal of frequency range is simultaneously transmitted.
S505, antenna element receive the modulated signal of Terahertz frequency range, and emit the modulated signal of Terahertz frequency range.
Signal receiving step：
S506, the low-noise amplifier in each receiving module of receiver are amplified processing to received carrier signal.
S507, the low-converter in each receiving module carry out down-converted to the carrier signal after enhanced processing.
S508, digital signal processing unit in each receiving module to downconverted treated carrier signal at
Reason, obtains digital baseband signal.Wherein, N is the integer more than 1.
Terahertz communicating wireless signals method provided in an embodiment of the present invention, in the transmitter of communication system, by by the roads N
Optical carrier is combined with reference optical carrier after modulating respectively and is reconverted into Terahertz through enhanced processing for signal all the way
The modulated signal of frequency range is emitted, and the modulated signal of the Terahertz frequency range emitted can be multi-carrier signal, to improve
Bandwidth availability ratio；By the way that N number of receiving module is arranged in the receiver of communication system, each receiving module can receive simultaneously
Carrier signal one of in the Terahertz frequency range modulated signal that processing transmitter is sent, so as to use multiple script phases
Parallel received signals are carried out to the receives link of narrower bandwidth, significantly improve data throughout, improve the logical of communication system entirety
Believe rate.
The Terahertz wireless signal sending method of the embodiment of the present invention, by by the roads N optical carrier and with reference to light carrier
After signal combining, amplification, optical fiber transmission, then branch is the roads N optical carrier and refers to optical carrier, and will be carried per light all the way
Wave signal is coupled with reference to optical carrier, and then the single of Terahertz frequency range that be converted into per signal all the way after coupling is carried
Wave modulated signal emits via each antenna element.Each antenna element can emit the single carrier tune of Terahertz frequency range all the way
Signal processed, to improve the transmitted in parallel ability of THz wave.
The embodiment of the present invention additionally provides a kind of Terahertz communicating wireless signals method, as shown in fig. 7, comprises：
Signal forwarding step：
S601, N number of optical modulator, which corresponds to, receives the roads N optical carrier, and is passed after the roads N optical carrier is modulated
It is defeated.
S602, optical combiner receive the modulated roads N optical carrier, by the modulated roads N optical carrier and reference
It is transmitted in multiplexing a to optical fiber after optical carrier combining.
S603, image intensifer receive the optical carrier after combining, will pass through light after the optical carrier amplification after combining
Fibre is transmitted.
Above-mentioned S601~S603 is identical as S301~S303 in embodiment of the method 1, and details are not described herein.
S604, optical branching device receive amplified optical carrier, amplified optical carrier are separated into N number of difference
The light modulating signal of carrier wave and a reference optical carrier are simultaneously transmitted respectively.
Above-mentioned splitter can also be demultiplexer, that is, the signal for being multiplexed with all the way can be demultiplexing as multiple signals.
S605, N number of polarization-maintaining photo-coupler couple the light modulating signal after each separation with reference to optical carrier.
Light modulating signal can be coupled with reference to optical carrier by polarization-maintaining photo-coupler, obtain it is desired too
Hertz frequency.
S606, N number of optical mixer unit correspond to the optical carrier after receiving the coupling of the roads N, and the light carrier after the roads N are coupled is believed
Number, corresponding conversion is the single-carrier modulated signal of the roads N Terahertz frequency range and is transmitted.
In the embodiment of the present invention, the optical carrier after each optical mixer unit can couple every road is converted to Terahertz frequency
The single-carrier modulated signal of section, optical mixer unit for example can be UTC-PD.
S607, N number of antenna element correspond to the single-carrier modulated signal for receiving and emitting the roads N Terahertz frequency range.
In the embodiment of the present invention, each antenna element the single-carrier modulated signal of every road Terahertz frequency range can be emitted to
Free space.
Signal receiving step：
S608, the low-noise amplifier in each receiver are amplified processing to received carrier signal.
S609, the low-converter in each receiver carry out down-converted to the carrier signal after enhanced processing.
S6010, digital signal processing unit in each receiver to downconverted treated carrier signal at
Reason, obtains digital baseband signal.Wherein, N is the integer more than 1.
Terahertz communicating wireless signals method provided in an embodiment of the present invention, by by the roads N optical carrier and reference light
After carrier signal combining, amplification, optical fiber transmission, then branch is the roads N optical carrier and refers to optical carrier, and will be per all the way
Optical carrier emits with reference to optical carrier via each antenna element.Each antenna element can emit terahertz all the way
The hereby single-carrier modulated signal of frequency range, to improve the transmitted in parallel ability of THz wave；Multiple receivers receive and process N
Wherein signal all the way in the single-carrier modulated signal of road Terahertz frequency range can be directed to the receiver of multiple relatively narrow bandwidths,
The bandwidth for making full use of transmitter improves the capacity that entire point (transmitting terminal) arrives multiple spot (receiving terminal) system.
It should be noted that herein, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or equipment including a series of elements includes not only those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or equipment institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including institute
State in the process, method, article or equipment of element that there is also other identical elements.
Each embodiment in this specification is all made of relevant mode and describes, identical similar portion between each embodiment
Point just to refer each other, and each embodiment focuses on the differences from other embodiments.Especially for system reality
For applying example, since it is substantially similar to the method embodiment, so description is fairly simple, related place is referring to embodiment of the method
Part explanation.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention, are all contained in protection scope of the present invention
It is interior.
Claims (10)
1. a kind of Terahertz wireless signal sending device, which is characterized in that described device includes transmitter, the transmitter packet
It includes：N number of optical modulator, optical combiner, image intensifer, optical mixer unit and antenna element, the N are the integer more than 1；
N number of optical modulator receives the roads N optical carrier for corresponding, and after the roads N optical carrier is modulated
Transmission；
The optical combiner, for receiving the modulated roads N optical carrier, by the modulated roads N optical carrier and reference
It is transmitted in multiplexing a to optical fiber after optical carrier combining；
The image intensifer will lead to for receiving the optical carrier after being combined after the optical carrier amplification after the combining
Optical fiber is crossed to be transmitted；
The optical mixer unit is converted to the amplified optical carrier too for receiving amplified optical carrier
The modulated signal of hertz frequency range is simultaneously transmitted；
The antenna element, the modulated signal for receiving the Terahertz frequency range, and emit the modulation of the Terahertz frequency range
Signal.
2. a kind of Terahertz wireless signal receiver, which is characterized in that described device includes receiver, and the receiver includes
N number of receiving module, each receiving module are used to receive and process in the Terahertz frequency range modulated signal of transmitter transmission
One of carrier signal；The N is the integer more than 1；The receiving module includes：Low-noise amplifier, low-converter, number
Word signal processing unit；
The low-noise amplifier, for being amplified processing to received carrier signal；
The low-converter, for carrying out down-converted to the carrier signal after enhanced processing；
The digital signal processing unit obtains digital baseband for treated that carrier signal is handled to downconverted
Signal.
3. a kind of Terahertz communicating wireless signals system, which is characterized in that including：Terahertz as described in claim 1 is wireless
Sender unit and Terahertz wireless signal receiver as claimed in claim 2.
4. a kind of Terahertz wireless signal sending device, which is characterized in that described device includes transmitter, the transmitter packet
It includes：N number of optical modulator, optical combiner, image intensifer, optical branching device, N number of polarization-maintaining photo-coupler, N number of optical mixer unit and N number of day
Line unit；The N is the integer more than 1；
N number of optical modulator receives the roads N optical carrier for corresponding, and after the roads N optical carrier is modulated
Transmission；
The optical combiner, for receiving the modulated roads N optical carrier, by the modulated roads N optical carrier and reference
It is transmitted in multiplexing a to optical fiber after optical carrier combining；
The image intensifer will lead to for receiving the optical carrier after being combined after the optical carrier amplification after the combining
Optical fiber is crossed to be transmitted；
The amplified optical carrier is separated into the roads N by the optical branching device for receiving amplified optical carrier
The light modulating signal of different carrier waves and a reference optical carrier are simultaneously transmitted respectively；
N number of polarization-maintaining photo-coupler is carried out with described with reference to optical carrier for the light modulating signal after detaching every road
Coupling；
N number of optical mixer unit receives the optical carrier after the roads N couple, the light carrier after the roads N are coupled for corresponding
Signal, corresponding conversion are the single-carrier modulated signal of the roads N Terahertz frequency range and are transmitted；
N number of antenna element, for the corresponding single-carrier modulated signal received and emit the roads N Terahertz frequency range.
5. a kind of Terahertz wireless signal receiver, which is characterized in that described device includes N number of receiver, each described to connect
Receipts machine is used to receive and process transmitter transmission, wherein signal all the way in the single-carrier modulated signal of the roads N Terahertz frequency range；
The N is the integer more than 1；The receiver includes：Low-noise amplifier, low-converter, digital signal processing unit；
The low-noise amplifier, for being amplified processing to the single-carrier signal received；
The low-converter, for carrying out down-converted to the single-carrier signal after enhanced processing；
The digital signal processing unit obtains digital base for treated that single-carrier signal is handled to downconverted
Band signal.
6. a kind of Terahertz communicating wireless signals system, which is characterized in that including：Terahertz as claimed in claim 4 is wireless
Sender unit and Terahertz wireless signal receiver as claimed in claim 5；The Terahertz wireless signal is sent
Device, the single-carrier signal for sending Terahertz frequency range to the Terahertz wireless signal receiver；The Terahertz without
Line signal receiving device, the single-carrier signal for receiving the Terahertz frequency range.
7. a kind of communication means of Terahertz wireless signal, which is characterized in that the method includes：
N number of optical modulator, which corresponds to, receives the roads N optical carrier, and is transmitted after the roads N optical carrier is modulated；
Optical combiner receives the modulated roads N optical carrier, by the modulated roads N optical carrier and refers to optical carrier
It is transmitted in multiplexing a to optical fiber after combining；
Image intensifer receives the optical carrier after combining, will be carried out by optical fiber after the optical carrier amplification after the combining
Transmission；
Optical mixer unit receives amplified optical carrier, and the amplified optical carrier is converted to Terahertz frequency range
Modulated signal is simultaneously transmitted；
Antenna element receives the modulated signal of the Terahertz frequency range, and emits the modulated signal of the Terahertz frequency range；
N number of receiving module of receiver receive and process transmitter transmission Terahertz frequency range modulated signal in one of carry
Wave signal, the N are the integer more than 1.
8. the method according to the description of claim 7 is characterized in that N number of receiving module of the receiver receives and processes hair
Penetrate machine transmission Terahertz frequency range modulated signal in one of carrier signal, including：
For N number of receiving module of the receiver, the low-noise amplifier in each receiving module is to received carrier signal
It is amplified processing；
Low-converter in each receiving module carries out down-converted to the carrier signal after enhanced processing；
Treated that carrier signal is handled to downconverted for digital signal processing unit in each receiving module, is counted
Word baseband signal.
9. a kind of communication means of Terahertz wireless signal, which is characterized in that the method includes：
N number of optical modulator, which corresponds to, receives the roads N optical carrier, and is transmitted after the roads N optical carrier is modulated；
Optical combiner receives the modulated roads N optical carrier, by the modulated roads N optical carrier and refers to optical carrier
It is transmitted in multiplexing a to optical fiber after combining；
Image intensifer receives the optical carrier after combining, will be carried out by optical fiber after the optical carrier amplification after the combining
Transmission；
Optical branching device receives amplified optical carrier, and the amplified optical carrier is separated into N number of different carrier waves
Light modulating signal and one with reference to optical carrier and being transmitted respectively；
N number of polarization-maintaining photo-coupler couples the light modulating signal after each separation with described with reference to optical carrier；
N number of optical mixer unit corresponds to the optical carrier after receiving the coupling of the roads N, and the optical carrier after the roads N are coupled is corresponding
It is converted to the single-carrier modulated signal of the roads N Terahertz frequency range and is transmitted；
N number of antenna element in the antenna element corresponds to the single-carrier modulated letter for receiving and emitting the roads N Terahertz frequency range
Number；
N number of antenna element corresponds to the single-carrier modulated signal for receiving and emitting the roads N Terahertz frequency range；
N number of receiver corresponds to the single-carrier modulated signal for receiving and processing the roads the N Terahertz frequency range transmitted by transmitter, the N
For the integer more than 1.
10. according to the method described in claim 9, it is characterized in that, N number of receiver correspondence receives and processes transmitter institute
The single-carrier modulated signal of the roads the N Terahertz frequency range of transmission, including：
For N number of receiver, the low-noise amplifier in each receiver, to the list of the roads the N Terahertz frequency range received
Carrier (boc) modulated signals wherein signal is amplified processing all the way；
Low-converter in each receiver to after enhanced processing wherein single-carrier modulated signal carries out at down coversion all the way
Reason；
Digital signal processing unit in each receiver to it is downconverted treated wherein all the way single-carrier modulated signal into
Row processing, obtains digital baseband signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810348351.XA CN108667531A (en) | 2018-04-18 | 2018-04-18 | Terahertz wireless signal sending device, reception device, communication system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810348351.XA CN108667531A (en) | 2018-04-18 | 2018-04-18 | Terahertz wireless signal sending device, reception device, communication system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108667531A true CN108667531A (en) | 2018-10-16 |
Family
ID=63780031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810348351.XA Pending CN108667531A (en) | 2018-04-18 | 2018-04-18 | Terahertz wireless signal sending device, reception device, communication system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108667531A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110071887A (en) * | 2019-05-14 | 2019-07-30 | 济南市半导体元件实验所 | The intensive modulating device of carrier phase and method |
| CN112583493A (en) * | 2021-01-06 | 2021-03-30 | 广东省新一代通信与网络创新研究院 | Short-distance terahertz communication system and signal sending and receiving method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101692627A (en) * | 2009-10-15 | 2010-04-07 | 复旦大学 | System for generating optical cable-carried terahertz signal based on two-stage single-side band modulation |
| CN102170715A (en) * | 2011-03-30 | 2011-08-31 | 东方通信股份有限公司 | Mobile communication base station transceiver employing software radio technology and signal processing method |
| CN102355302A (en) * | 2011-08-17 | 2012-02-15 | 于晋龙 | ROF transmission method of terminal selectable frequency band/bandwidth based on optical phase lock |
| US20160317049A1 (en) * | 2006-12-19 | 2016-11-03 | Valencell, Inc. | Apparatus, Systems, and Methods for Measuring Environmental Exposure and Physiological Response Thereto |
| CN106130655A (en) * | 2016-06-30 | 2016-11-16 | 中国科学院上海微系统与信息技术研究所 | A kind of multi-modal orbital angular momentum multiplex communication system and method |
-
2018
- 2018-04-18 CN CN201810348351.XA patent/CN108667531A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160317049A1 (en) * | 2006-12-19 | 2016-11-03 | Valencell, Inc. | Apparatus, Systems, and Methods for Measuring Environmental Exposure and Physiological Response Thereto |
| CN101692627A (en) * | 2009-10-15 | 2010-04-07 | 复旦大学 | System for generating optical cable-carried terahertz signal based on two-stage single-side band modulation |
| CN102170715A (en) * | 2011-03-30 | 2011-08-31 | 东方通信股份有限公司 | Mobile communication base station transceiver employing software radio technology and signal processing method |
| CN102355302A (en) * | 2011-08-17 | 2012-02-15 | 于晋龙 | ROF transmission method of terminal selectable frequency band/bandwidth based on optical phase lock |
| CN106130655A (en) * | 2016-06-30 | 2016-11-16 | 中国科学院上海微系统与信息技术研究所 | A kind of multi-modal orbital angular momentum multiplex communication system and method |
Non-Patent Citations (2)
| Title |
|---|
| S. KOENIG: "Wireless sub-THz communication system with high data rate", 《NATURE PHOTONICS》 * |
| 张建: "太赫兹高速无线通信：体制、技术与验证系统", 《太赫兹科学与电子信息学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110071887A (en) * | 2019-05-14 | 2019-07-30 | 济南市半导体元件实验所 | The intensive modulating device of carrier phase and method |
| CN112583493A (en) * | 2021-01-06 | 2021-03-30 | 广东省新一代通信与网络创新研究院 | Short-distance terahertz communication system and signal sending and receiving method |
| WO2022148092A1 (en) * | 2021-01-06 | 2022-07-14 | 广东省新一代通信与网络创新研究院 | Short-distance terahertz communication system and signal sending and receiving method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10491273B2 (en) | Distributed antenna system for MIMO signals | |
| EP1056226B1 (en) | Module for radio transmission over optical fibre | |
| AU2005303660B2 (en) | Data communications system | |
| US8694034B2 (en) | System and method for the distribution of radio-frequency signals | |
| EP1825700B1 (en) | Data communication apparatus with multiple antennas | |
| US7733825B2 (en) | ROF link apparatus capable of stable TDD wireless service | |
| CN104539329B (en) | A kind of antenna and active antenna system | |
| US10044417B2 (en) | Systems and methods for RRU control messaging architecture for massive MIMO systems | |
| Bogaert et al. | SiPhotonics/GaAs 28-GHz transceiver with reflective EAM for laser-less mmWave-over-fiber | |
| CN102315880A (en) | Light path transmission method and device | |
| CN108667531A (en) | Terahertz wireless signal sending device, reception device, communication system and method | |
| EP2273699A1 (en) | A method for bidirectional transmission of signals, and a transceiver therefor | |
| CN101218760B (en) | Point-to-point telecom system | |
| CN114039665A (en) | Multi-carrier frequency generation and reliable transmission method for RoF system | |
| CN116709523B (en) | High-spectral-efficiency full-duplex millimeter wave communication wireless link system based on polarization multiplexing | |
| Sung et al. | Experimental demonstration of bandwidth-efficient indoor distributed antenna system based on IFoF technology supporting 4G LTE-A and 5G mobile services | |
| CN108809427A (en) | Based on the adjustable Terahertz wireless communication system of the phased wave beam of optics and communication means | |
| KR20160081122A (en) | Distributed antenna system for multiple-input multiple-output signal | |
| Li et al. | Multi-service digital radio over fibre system with millimetre wave bridging | |
| CN113037386B (en) | Central unit and remote unit | |
| CN102648586B (en) | Wireless communication device | |
| Kanno et al. | All-spectrum fiber-wireless transmission for 5G backhaul and fronthaul links | |
| US8060028B1 (en) | Multi-spectrum high data rate communications system with electromagnetic interference cancellation | |
| WO2010035010A1 (en) | Apparatus and method for transporting multiple signals over optical fiber | |
| Berceli | A combined optical–wireless indoor communication system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181016 |