CN107786962A - Radio communication device and radio communication group row - Google Patents
Radio communication device and radio communication group row Download PDFInfo
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- CN107786962A CN107786962A CN201710984020.0A CN201710984020A CN107786962A CN 107786962 A CN107786962 A CN 107786962A CN 201710984020 A CN201710984020 A CN 201710984020A CN 107786962 A CN107786962 A CN 107786962A
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- 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
- H04B10/25—Arrangements specific to fibre transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0075—Arrangements for synchronising receiver with transmitter with photonic or optical means
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Abstract
The present embodiments relate to a kind of radio communication device, including：Optical-electrical converter, frequency generator, modulator, power amplifier and antenna；Optical-electrical converter receives the branch optical signal that optical branching device is sent, and branch optical signal is changed into the first electric signal, is sent to modulator；Frequency generator produces frequency signal, is sent to modulator；Modulator modulates the first electric signal into frequency signal, produces the first drive signal, and be sent to power amplifier；Power amplifier is amplified to the first drive signal, produces the first drive signal of amplification；Antenna sends the first pulse signal according to the first drive signal of amplification, is received for wireless signal transceiver.The present invention combines millimetre-wave attenuator technology and optical communication technique, and is communicated using special communication protocol come with realizing car of the train under high-speed mobile condition Large Copacity, highly reliable data.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of radio communication device and radio communication group row.
Background technology
Up to now, the purpose that all GSMs are established is provided to solve personal communication, so, the first generation is moved
Dynamic communication system is provided to improve the matter of personal communication to 5G GSMs now, all mobile communication technology development
Amount.Therefore, attempt to establish on the existing technology of mobile communication or existing infrastructure and solve high under the conditions of wide area
The train-ground communication of fast train is unpractical.In fact, the GSM-R developed at present with GSM technology increasingly can not
The more and more urgent information-based and intelligentized train-ground communication demand of high-speed railway traffic is adapted to, and can't see this technology
Effective progress and high ferro land mobile communication system technical progress.
Because under high-speed mobile condition, radio communication is first subjected to the influence of Doppler effect, due to wireless frequency with
The raising frequency shift (FS) phenomenon of translational speed also can synchronously aggravate, and this not only results in frequency step-out and for believing in high density
Number modulation under broadband wireless communications can also bring obviously signal step-out, radio receiver can not parse sender institute
The signal of communication of transmission.
Under high-speed mobile condition, the multipath fading of radio communication especially wireless broadband communication is drastically amplified, directly logical
Believe that path is destroyed due to high-speed mobile and the substitute is many unforeseen communication paths, these phenomenons are directly to lead
Cause the main reason for multipath fading significantly increases under high-speed mobile.This phenomenon is under high-power communication at a distance
It is especially prominent.
In order to reach the purpose of radio communication especially wireless broadband communication under high-speed condition, built at a distance along high ferro circuit
If base station and to increase communication and power be common practice, and this way exactly reduces the reliability of radio communication.Long distance
From radio communication, such as rain, snow, mist harsh weather phenomenon can not only reduce the quality of radio communication due to climate change,
Communication can be therefore even interrupted, therefore such radio communication will lose the information-based and intelligentized important support means of high ferro
Status, the information-based and intelligentized failure of high ferro can be directly resulted in.
Equally, although wireless light communication is not influenceed by Doppler effect, the requirement to meteorological condition is too high and is
The possibility that also can't see this technology at present and be applied to high ferro communication that the high complexity of system is, and satellite communication is except communication
Outside the limitation of bandwidth, satellite-signal too weak and too many railway tunnel in high latitude area is also limitation satellite communication applications in high ferro
Train-ground communication main cause.
The content of the invention
The purpose of the present invention is the defects of being directed to prior art, there is provided a kind of radio communication device and radio communication group row,
A kind of brand-new wireless communications mode is provided, millimetre-wave attenuator technology is applied to train-ground communication to solve communication bandwidth,
Remote high-power communication is substituted with short distance micropower wireless communication technology and solves the integrity problem of radio communication, with wireless
The reactance modulation system of optic communication substitutes the conventional highdensity signal modulation technique of current wireless broadband communication, reaches and moves at a high speed
Signal synchronization and Frequency Synchronization under the conditions of dynamic；Thus, the present invention combines millimetre-wave attenuator technology and optical communication technique, and uses
Special communication protocol communicates with realizing car of the train under high-speed mobile condition Large Copacity, highly reliable data.
To achieve the above object, in a first aspect, the invention provides a kind of radio communication device, the radio communication dress
Put including optical-electrical converter, frequency generator, modulator, power amplifier and antenna；
The optical-electrical converter receives the branch optical signal that optical branching device is sent, and the branch optical signal is changed into first
Electric signal, it is sent to the modulator；
The frequency generator produces frequency signal, is sent to the modulator；
The modulator modulates first electric signal into the frequency signal, produces the first drive signal, concurrently
Give the power amplifier；
The power amplifier is amplified to first drive signal, produces the first drive signal of amplification；
The antenna sends the first pulse signal according to the first drive signal of the amplification, for wireless signal transceiver
Received.
Preferably, the antenna is additionally operable to receive the signal of communication that wireless signal transceiver is sent；
The modulator is additionally operable to the signal of communication being demodulated, and produces the second electric signal；
Second electric signal is generated communicating light signal by the optical-electrical converter.
Preferably, the antenna is radio-frequency antenna, and the radio-frequency antenna is specifically used for the first drive signal of the amplification
The pulse signal of micropower first is generated to send.
It is further preferred that the pulse signal of micropower first is radiofrequency signal.
Preferably, the modulation system of described modulator is on-off keying or digit pulse interval modulation.
In second aspect, the embodiments of the invention provide a kind of radio communication group row, the radio communication group row include：Light
Shunt and multiple wireless communication nodes；
The optical branching device, for signal optical signal to be carried out into branch process, obtain branch optical signal；
The wireless communication node includes：Optical-electrical converter, frequency generator, modulator, power amplifier and antenna；
The optical-electrical converter, the branch optical signal sent for receiving the optical branching device, by the branch optical signal
The first electric signal is changed into, is sent to the modulator；
The frequency generator produces frequency signal, is sent to the modulator；
The modulator receives and modulates first electric signal into the frequency signal, produces the first synchronous driving letter
Number, and it is sent to the power amplifier；
The power amplifier is amplified to first synchronized signal, produces the synchronous driving letter of amplification first
Number；
The antenna sends pulse signal according to the first synchronized signal of the amplification, thus the radio communication group row
Each wireless communication node it is simultaneously synchronous send pulse signal described in identical, received and dispatched for external wireless signals in chain
Wireless signal transmitting-receiving node receives successively.
Preferably, radio communication group row also include first group of row optical fiber, are connected with the optical branching device, for
The optical branching device transmits the signal optical signal.
Preferably, radio communication group row also include signal processor, respectively with the multiple wireless communication node phase
Connection；
Each antenna of the multiple wireless communication node is additionally operable to receive wireless in the wireless signal transmitting-receiving chain
Multiple signals of communication that signal transmitting and receiving node is sent；
The modulator is additionally operable to the signal of communication that respective antenna receives being demodulated, and produces the second electric signal；
Second electric signal caused by corresponding modulating device is generated communicating light signal by the optical-electrical converter；
The signal processor is used to receive the communicating light signal that each described wireless communication node is sent respectively, goes forward side by side
Row filtration treatment is reception optical signal.
It is further preferred that the radio communication group row also include：
Second group of row optical fiber, is connected with the signal processor, the reception sent for transmitting the signal processor
Optical signal.
It is further preferred that the radio communication group row also include：
Optical Communication Terminal, it is connected with second group of row optical fiber, the reception sent for handling second group of row optical fiber
Optical signal.
A kind of radio communication device provided in an embodiment of the present invention, there is provided a kind of brand-new wireless communications mode, will milli
The metric wave communication technology is applied to train-ground communication to solve communication bandwidth, and long distance is substituted with short distance micropower wireless communication technology
From the integrity problem that high-power communication solves radio communication, substituted with the reactance modulation system of wireless light communication at present without line width
With the highdensity signal modulation technique that communication is conventional, reach signal synchronization and the Frequency Synchronization under high-speed mobile condition；Thus,
Realize train under high-speed mobile condition with reference to millimetre-wave attenuator technology and optical communication technique, and using special communication protocol
Car Large Copacity, highly reliable data communication.
Brief description of the drawings
Fig. 1 is the structural representation of radio communication device provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram that radio communication device provided in an embodiment of the present invention sends signal；
Fig. 3 is the structural representation of radio communication group provided in an embodiment of the present invention row.
Embodiment
Below by drawings and examples, technical scheme is described in further detail.
Fig. 1 is the structural representation of radio communication device provided in an embodiment of the present invention, as shown in figure 1, radio communication fills
Put including optical-electrical converter 11, frequency generator 12, modulator 13, power amplifier 14 and antenna 15.
Optical-electrical converter 11 receives the branch optical signal that optical branching device 2 is sent, and branch optical signal is changed into the first telecommunications
Number, it is sent to modulator 13.Frequency generator 12 produces frequency signal, is sent to modulator 13.Modulator 13 is by opto-electronic conversion
The first electric signal that device 11 is sent is modulated into frequency signal caused by frequency generator 12, so as to produce the first drive signal,
And it is sent to power amplifier 14.Preferably, the modulation system of modulator 13 is impulse modulation mode, such as on-off keying (on-
Off keying modulation, OOK) or digit pulse interval modulation (digital pulse interval
Modulation, DPIM) etc..Power amplifier 14 is amplified to the first drive signal, produces the first drive signal of amplification, hair
Give antenna 15.Antenna 15 sends the first pulse signal according to the first drive signal of amplification, enters for wireless signal transceiver
Row receives.In order to realize the stabilization of signal between radio communication device and wireless signal transceiver, quick, transmitting, day
Line 15 is preferably radio-frequency antenna 15, and radio-frequency antenna 15 amplifies the first drive signal according to caused by power amplifier 14 and generates micro- work(
The pulse signal of rate first is simultaneously sent, wherein, the pulse signal of micropower first is radiofrequency signal.
In addition, in radio communication device reception signal, antenna 15 can be also used for receiving wireless signal transceiver hair
The signal of communication sent.Signal of communication can also be demodulated by modulator 13, so as to produce the second electric signal, be sent to photoelectricity and turned
Parallel operation 11.Second electric signal is generated communicating light signal by optical-electrical converter 11, so as to convert electrical signals into optical signal.
Radio communication device provided by the invention, the reliable biography of the signal between wireless signal transceiver can be realized
Defeated, in specific application, radio communication device is arranged on train end, and wireless signal transceiver is carried out along parallel track axis
Set on the ground, lower mask body introduces train-ground communication process.
When train earthward communicates, earthward wireless signal transceiver sends micropower arteries and veins to in-vehicle wireless communication device
Rush signal.
Specifically, Fig. 2 is the schematic diagram that radio communication device provided in an embodiment of the present invention sends signal, with reference to Fig. 2 institutes
Show, the optical-electrical converter 11 of radio communication device receives the branch optical signal that optical branching device (not shown in Fig. 2) is sent, by branch
Optical signal changes into the first electric signal, is sent to modulator 13, wherein, the waveform of branch optical signal can be that photoelectricity turns in Fig. 2
The oscillogram of the lower section of parallel operation 11, the oscillogram of the first electric signal formed after photoelectric conversion can be the top of optical-electrical converter 11
Oscillogram；Specifically, optical fiber transmission is signal optical signal, and optical signal is to be used for being sent to ground caused by train
Receiving terminal (such as wireless signal transceiver).Optical branching device is connected with optical fiber, therefore can receive what optical fiber was transmitted
Signal optical signal, signal optical signal is then divided into multichannel identical branch optical signal, per branch optical signal transmission all the way to one
Radio communication device corresponding to individual.Branch optical signal can be carried out subsequent treatment, opto-electronic conversion therein by radio communication device
The branch optical signal received can be changed into the first electric signal by device 11.
Frequency generator 12 produces frequency signal, is sent to modulator 13；Specifically, frequency generator 12 can produce surely
The frequency signal of standing wave shape, so that modulator 13 carries out carrier wave, frequency signal oscillogram can be caused by frequency generator 12
Oscillogram shown in the top of frequency generator 12.
The first electric signal that modulator 13 sends optical-electrical converter 11, which is modulated to frequency caused by frequency generator 12, to be believed
In number, that is, electric signal is carried in the frequency signal of stable waveform, so as to produce the first drive signal, and is sent to work(
Rate amplifier 14, wherein, the oscillogram of the first drive signal can be the oscillogram shown in the upper left side of modulator 13；Modulator 13
Modulation system be impulse modulation mode, such as OOK or DPIM etc..
Because the waveform of the first drive signal caused by modulator 13 is smaller, it is necessary to which power amplifier 14 is believed the first driving
Number it is amplified, so as to produce the first drive signal of amplification, and then obtains the obvious signal of waveform, power amplifier 14 will amplifies
First drive signal is sent to antenna 15, wherein, antenna 15 is preferably radio-frequency antenna 15, specifically, radio-frequency antenna 15
The pulse signal of micropower first is generated according to the first drive signal of amplification caused by power amplifier 14, is sent to the wireless communication on ground
Number R-T unit, wherein, the pulse signal of micropower first is radiofrequency signal.Thus achieve the communication of train end earthward.
When ground is to train communication, the in-vehicle wireless communication device on train receives terrestrial wireless signal transmitting-receiving dress
The signal of communication of transmission is put, and generates communicating light signal.
Specifically, the antenna 15 of radio communication device receives the communication that any wireless signal transceiver on ground is sent
Signal；Signal of communication is demodulated by modulator 13, is produced the second electric signal, is sent to optical-electrical converter 11；Optical-electrical converter
Second electric signal is generated communicating light signal by 11, so as to convert electrical signals into optical signal.In-vehicle wireless communication device will generate
Communicating light signal vehicle-mounted Optical Communication Terminal 6 is sent to by optical fiber, Optical Communication Terminal 6 is handled communicating light signal.Thus it is real
Communication of the ground to train end is showed.
Radio communication device provided in an embodiment of the present invention, in communication process, the modulation of signal is modulated using optic communication
Mode, OOK, DPIM modulation system so as to obtain car, between the good time synchronized of signal, avoid radio communication device in height
To the signal synchronization of wireless signal and Phase-Resolved Analysis during speed is mobile, signal modulation can be caused by solving traditional complicated modulation methods
When there is the problem of excessive dropout.
Corresponding, based on above-mentioned radio communication device, present invention also offers a kind of radio communication group row, Fig. 3 is this
The structural representation for the radio communication group row that inventive embodiments provide, as shown in figure 3, radio communication group row include：Optical branching device 2
With multiple wireless communication nodes 1, wherein, wireless communication node 1 be above-mentioned radio communication device.
Optical branching device 2 is used to signal optical signal carrying out branch process, multichannel identical branch optical signal is obtained, by multichannel
Identical branch optical signal is sent respectively to wireless communication node 1.
Signal optical signal is exactly the signal earthward transmitted in train, and the effect of optical branching device 2 is exactly by signal optical signal
Carry out branch process and be sent respectively to wireless communication node 1, be achieved in that signal optical signal transmits downwards in the form of broadcasting,
So branch optical signal received on each wireless communication node 1 is the same.
Multiple wireless communication nodes 1 linearly arrange, again as shown in figure 1, wireless communication node 1 specifically includes photoelectricity turn
Parallel operation 11, frequency generator 12, modulator 13, power amplifier 14 and antenna 15.
Optical-electrical converter 11 is used for the branch optical signal for receiving the transmission of optical branching device 2, and branch optical signal is changed into first
Electric signal, it is sent to modulator 13.Frequency generator 12 produces frequency signal, is sent to modulator 13；Specifically, frequency occurs
Device 12 can produce the frequency signal of stable waveform, so that modulator 13 carries out carrier wave.Modulator 13 modulates the first electric signal
It is carried in into frequency signal, that is, by electric signal in the frequency signal of stable waveform, so as to produce the first synchronous driving letter
Number, and it is sent to power amplifier 14；The modulation system of modulator 13 can be specifically impulse modulation mode, for example, OOK or
DPIM modulation etc..Because the waveform of the first synchronized signal caused by modulator 13 is smaller, it is necessary to which power amplifier 14 is to
One synchronized signal is amplified, and so as to produce the first synchronized signal of amplification, and then obtains the obvious signal of waveform, work(
Rate amplifier 14 is sent to antenna 15 by the first synchronized signal is amplified.
Antenna 15 sends pulse signal according to the first synchronized signal of amplification, is then sent to the pulse signal of generation
Wireless signal transmitting-receiving node in external wireless signals transmitting-receiving chain.In order to realize radio communication group row and wireless signal transmitting-receiving chain it
Between the stabilization of signal, quick, transmitting, antenna 15 is preferably radio-frequency antenna 15, and radio-frequency antenna 15 is according to power amplifier 14
First pulse signal of caused amplification the first synchronized signal generation micropower is sent, wherein, the first pulse of micropower
Signal is radiofrequency signal.
In a preferred embodiment, radio communication group row also include first group of row optical fiber 4, are connected with optical branching device 2, use
In to the transmission signal optical signal of optical branching device 2.
Each antenna 15 of multiple wireless communication nodes 1 can be also used for receiving the wireless communication in wireless signal transmitting-receiving chain
The signal of communication that number transmitting-receiving node is sent.
Again as shown in figure 3, the radio communication group row of the present invention also include signal processor 3, signal processor 3 can be core
Piece, it is connected respectively with multiple wireless communication nodes 1；For believing identical Communication ray caused by multiple wireless communication nodes 1
Number carry out filtration treatment.
Specifically, modulator 13 is additionally operable to the signal of communication that corresponding antenna 15 receives being demodulated, the second electricity is produced
Signal.Second electric signal caused by corresponding modulating device 13 is generated communicating light signal by optical-electrical converter 11.Signal processor 3 is used for
The communicating light signal of each wireless communication node 1 transmission is received respectively, and carries out filtration treatment to receive optical signal.Channel radio
Letter group row also include second group of row optical fiber 5, are connected with signal processor 3, the reception light sent for transmission signal processor 3
Signal.Radio communication group row also include Optical Communication Terminal 6, are connected with second group of row optical fiber 5, for handling second group of row optical fiber 5
The reception optical signal of transmission.
Radio communication group row provided by the invention, the transmitting of the signal between wireless signal transmitting-receiving chain can be realized,
It should be noted that wireless signal transmitting-receiving chain includes multiple wireless signal transmitting-receiving nodes, multiple wireless signal transmitting-receiving nodes lead to
EPON connection is crossed, forms chain wireless network.Radio communication group arrange and wireless signal receive and dispatch chain distribution be it is parallel,
It can specifically apply in train communication, radio communication group arranges to be arranged on compartment along the y direction of train, and wireless signal is received
Direction of the chain along train rail is sent out to set, the antenna 15 and rail of each wireless signal transmitting-receiving node are perpendicular, and with it is wireless
The direction of antenna 15 of communication node 1 is relative, and the wireless signal that its distance ensures mutually to launch can completely be received by other side, so as to
Form radio communication relation；Wherein, the length of line style radio communication group row is L, and wireless signal receives and dispatches each wireless signal of chain
The distance between transmitting-receiving node is equal, and equal to the length L of line style radio communication group row.Lower mask body is introduced onboard wireless and led to
Letter group arranges the communication process between terrestrial wireless signal transmitting-receiving chain.
When train earthward communicates, the signal optical signal that is sent by train signal processing system end by Optical Communication Terminal 6
Transmitted along first group of row optical fiber 4, N roads identical branch optical signal, N roads identical branch light letter are divided into by optical branching device 2
Number transmitted respectively along first group of row optical fiber 4 to corresponding wireless communication node 1, the opto-electronic conversion of each wireless communication node 1
Device 11 receives the branch optical signal all the way that optical branching device 2 is sent, and branch optical signal changed into the first electric signal, and specific first
Electric signal change into the process of the pulse signal of micropower first and the processing procedure of above-mentioned wireless signal transceiver be it is the same,
Here is omitted.
It should be noted that the meaning of the modulator 13 of each wireless communication node 1 is in control radio communication group row
Corresponding wireless communication node 1 is synchronously sent out signal, can so send out the dot signal of single wireless communication node 1
Penetrate the wire signal transmitting for being converted into radio communication group row.Wireless signal receives and dispatches chain and is receiving the signal of radio communication group row transmitting
When, not perception and differentiation is the signal which wireless communication node 1 is sent, and in moving train operation, a nothing
Line signal transmitting and receiving node can sequentially receive the letter that each wireless communication node 1 is sent from the beginning to the end in radio communication group row
Number.
Further, in-vehicle wireless communication group row each wireless communication node 1 under the control of respective modulator 13,
Identical frequency, and the pulse of micropower first letter of basic synchronization in time are synchronously sent according to communication protocol as defined in system
Number, these synchronous pulse signals of micropower first form the wireless signal transmitting-receiving chain of a sensing GCS Ground Communication System, so as to
A wireless signal transmitting-receiving node in chain is received and dispatched by wireless signal to receive；Wireless signal transmitting-receiving node is received and dispatched in wireless signal
Under the control of the isochronous controller of chain, the signal received is subjected to protocol conversion, and by the photoelectricity of wireless signal transmitting-receiving node
Converter 11 changes into optical signal, then according to ground network receiving terminal Optical Communication Terminal 6 instruction, optical signal is passed through into optical fiber
Ground receiver end is transferred to be handled.It should be noted that the modulator 13 of each wireless communication node 1 can pass through physics
The method of regulation obtains the pulse signal of micropower first of time upper basic synchronization, each wireless communication node 1 send first
Phase error between the wavelength of pulse signal is little, so as to ensure that each wireless communication node 1 in radio communication group row is same
Step sends the pulse signal of identical first.
In train traveling process, with the movement of train, line style radio communication group row can be with train movement until departing from
The wireless signal transmitting-receiving node BF (k) of ground chain network, but due between the wireless signal transmitting-receiving node of ground network away from
From the equal length arranged with line style radio communication group, therefore, depart from wireless signal transmitting-receiving node BF when line style radio communication group arranges
(k) it is inevitable that another identical is accessed according to moving direction simultaneously when, and in the wireless signal transmitting-receiving node BF of synchronous working
(k-1) line style radio communication group row or wireless signal transmitting-receiving node BF (k+1), and by new wireless signal transmitting-receiving node are received
The wireless communication signals of transmission, and light letter is converted to by the optical-electrical converter 11 of each wireless signal transmitting-receiving node successively in order
Number, the Optical Communication Terminal 6 for being transferred to terrestrial communication networks is handled.For convenience of description, above-mentioned BF represents wireless signal transmitting-receiving section
24, BF of point (k) represents k-th of wireless signal transmitting-receiving node, and BF (k-1) represents -1 wireless signal transmitting-receiving node of kth, BF (k+
1)+1 wireless signal transmitting-receiving node of kth is represented.
Thus, vehicle-mounted line style radio communication group arranges the chain wireless network formed with train along terrestrial wireless signal transmitting-receiving chain
Network moves, and the machine of each wireless communication node 1 of line style radio communication group row passes sequentially through the wireless communication of ground chain wireless network
Number transmitting-receiving node, because each Complete Synchronization of wireless communication node 1 works, so train by when, ground network it is wireless
The signal that signal transmitting and receiving node receives is duplicate, will not be influenceed by train moving process.
Meanwhile although during train high-speed mobile, vehicle-mounted line style radio communication group row also in high-speed mobile, by
The radio wave and the wireless signal transmitting-receiving node of ground network sent in line style radio communication group row is substantially vertical, and employs
The reactance modulation system of optic communication, thus influence of the Doppler effect for communication process is very little.Further, due to line
The direction of the launch of the radio wave of type radio communication group row receives and dispatches chain perpendicular to terrestrial wireless signal, so there is high s/n ratio
The communication path based on directapath, the power adjustment arranged by radio communication group and can using the antenna system of high-quality
To avoid the interference of multipath, so as to ensure communication quality in the quick traveling process of train.
Further, in this example, by taking communication frequency 90G millimeter waves as an example, if being calculated with 5% signal modulation rate,
About 4.5G traffic rate can be obtained under 90G carrier frequencies, equally, in frequency 45G, 60G these frequencies for being easier to obtain
Section getable traffic rate be also considerable, can be provided considerably beyond current communication system for bullet train
Traffic rate, therefore arrange that multiple Frequency points carry out communication and can obtain more communication bandwidths in millimeter-wave frequency section.
When ground is to train communication, signal optical signal is sent by the Optical Communication Terminal 6 of ground core network network, transmitted along optical fiber
Each wireless signal transmitting-receiving node in chain is received and dispatched to wireless signal, the optical signal that each wireless signal transmitting-receiving node receives exists
Electric signal is converted into the presence of corresponding photovoltaic converter, and under the control of the isochronous controller in wireless signal transmitting-receiving chain
Handle as synchronized signal, and identical frequency is synchronously sent according to communication protocol as defined in system, and it is synchronous in time
Pulse signal, these synchronous pulse signals form the wireless communication signals for pointing to vehicle-carrying communication radio communication groups row,
And received by the wireless communication node 1 that radio communication group arranges.Specifically, the antenna 15 of multiple wireless communication nodes 1 receives wirelessly
The signal of communication that wireless signal transmitting-receiving node in signal transmitting and receiving chain is sent；Wireless communication node 1 is to the signal of communication that receives
Handled, so as to generate communicating light signal, be sent to signal processor 3, concrete processing procedure and above-mentioned radio communication device
Processing procedure it is identical, here is omitted；Signal processor 3 receives the communication of each wireless communication node 1 transmission respectively
Optical signal, and filtration treatment is carried out to receive optical signal, so as to filter out the identical communication that multiple wireless communication nodes 1 are sent
Optical signal, and handled by second group of row optical fiber 5 by optical signal transmission to vehicle-mounted Optical Communication Terminal 6 is received.
In train high-speed mobile, radio communication group arranges to be moved with car, and is received to be received and dispatched by each wireless signal successively and saved
The identical signal of communication that point is sent, the continuous reception formed in chain network coverage.
Thus, in the communication process between above-mentioned in-vehicle wireless communication group row and terrestrial wireless signal transmitting-receiving chain, signal
Modulation using the modulation system such as optic communication modulation system, OOK, DPIM so as to obtain car, between signal it is good time it is same
Step, avoids wireless receiver in high-speed mobile to the signal synchronization of wireless signal and Phase-Resolved Analysis；Further, millimeter wave is used
The difficulty that optical system is aligned and switched under high-speed mobile can be avoided by substituting light wave.
Furthermore, it is necessary to explanation, in train travelling process, each in-vehicle wireless communication of in-vehicle wireless communication group row
Node can also receive the signal that terrestrial wireless signal transmitting-receiving chain is sent, can utilize frequency division multiplexing while signal is sent
To realize.
Likewise, each wireless signal receives node using frequency multiplexing technique in reception car in terrestrial wireless signal transmitting-receiving chain
While carrier radio communication group row send signal, it can also be arranged to radio communication group and send signal.That is radio communication section
Point and wireless signal, which receive node, can receive and send simultaneously signal, so as to realize the continuous communiction mistake in train motion process
Journey.
Radio communication device provided in an embodiment of the present invention and radio communication group row, there is provided a kind of brand-new radio communication
Pattern, millimetre-wave attenuator technology is applied to train-ground communication to solve communication bandwidth, with short distance micro power radio communication skill
Art substitutes remote high-power communication and solves the integrity problem of radio communication, is substituted with the reactance modulation system of wireless light communication
The conventional highdensity signal modulation technique of wireless broadband communication at present, reaches signal synchronization and the frequency under high-speed mobile condition
It is synchronous；Thus, with reference to millimetre-wave attenuator technology and optical communication technique, and realize train at a high speed using special communication protocol
Car under mobile condition ground Large Copacity, the communication of highly reliable data.
Professional should further appreciate that, each example described with reference to the embodiments described herein
Unit and algorithm steps, it can be realized with electronic hardware, computer software or the combination of the two, it is hard in order to clearly demonstrate
The interchangeability of part and software, the composition and step of each example are generally described according to function in the above description.
These functions are performed with hardware or software mode actually, application-specific and design constraint depending on technical scheme.
Professional and technical personnel can realize described function using distinct methods to each specific application, but this realization
It is it is not considered that beyond the scope of this invention.
The method that is described with reference to the embodiments described herein can use hardware, computing device the step of algorithm
Software module, or the two combination are implemented.Software module can be placed in random access memory (RAM), internal memory, read-only storage
(ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field
In any other form of storage medium well known to interior.
Above-described embodiment, the purpose of the present invention, technical scheme and beneficial effect are carried out further
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., all should include
Within protection scope of the present invention.
Claims (10)
- A kind of 1. radio communication device, it is characterised in that the radio communication device include optical-electrical converter, frequency generator, Modulator, power amplifier and antenna；The optical-electrical converter receives the branch optical signal that optical branching device is sent, and the branch optical signal is changed into the first telecommunications Number, it is sent to the modulator；The frequency generator produces frequency signal, is sent to the modulator；The modulator modulates first electric signal into the frequency signal, produces the first drive signal, and be sent to The power amplifier；The power amplifier is amplified to first drive signal, produces the first drive signal of amplification；The antenna sends the first pulse signal according to the first drive signal of the amplification, is carried out for wireless signal transceiver Receive.
- 2. radio communication device according to claim 1, it is characterised in thatThe antenna is additionally operable to receive the signal of communication that wireless signal transceiver is sent；The modulator is additionally operable to the signal of communication being demodulated, and produces the second electric signal；Second electric signal is generated communicating light signal by the optical-electrical converter.
- 3. radio communication device according to claim 1, it is characterised in that the antenna is radio-frequency antenna, the radio frequency Antenna is specifically used for sending the amplification the first drive signal generation micropower first pulse signal.
- 4. radio communication device according to claim 3, it is characterised in that the pulse signal of micropower first is radio frequency Signal.
- 5. radio communication device according to claim 1, it is characterised in that the modulation system of described modulator is switch Keying or digit pulse interval modulation.
- 6. a kind of radio communication group row, the radio communication group row include：Optical branching device and multiple wireless communication nodes；The optical branching device, for signal optical signal to be carried out into branch process, obtain branch optical signal；The wireless communication node includes：Optical-electrical converter, frequency generator, modulator, power amplifier and antenna；The optical-electrical converter, the branch optical signal sent for receiving the optical branching device, the branch optical signal is converted Into the first electric signal, the modulator is sent to；The frequency generator produces frequency signal, is sent to the modulator；The modulator modulates first electric signal into the frequency signal, produces the first synchronized signal, concurrently Give the power amplifier；The power amplifier is amplified to first synchronized signal, produces the first synchronized signal of amplification；The antenna sends pulse signal according to the first synchronized signal of the amplification, and thus the radio communication group row is every One wireless communication node is simultaneously synchronous to send pulse signal described in identical, is received and dispatched for external wireless signals wireless in chain Signal transmitting and receiving node receives successively.
- 7. radio communication group row according to claim 6, it is characterised in that the radio communication group row also include first group Row optical fiber, it is connected with the optical branching device, for transmitting the signal optical signal to the optical branching device.
- 8. radio communication group row according to claim 6, it is characterised in that the radio communication group row also include at signal Device is managed, is connected respectively with the multiple wireless communication node；Each antenna of the multiple wireless communication node is additionally operable to receive the wireless signal in the wireless signal transmitting-receiving chain Multiple signals of communication that transmitting-receiving node is sent；The modulator is additionally operable to the signal of communication that respective antenna receives being demodulated, and produces the second electric signal；Second electric signal caused by corresponding modulating device is generated communicating light signal by the optical-electrical converter；The signal processor is used to receive the communicating light signal that each described wireless communication node is sent respectively, and carries out Filter processing is reception optical signal.
- 9. radio communication group row according to claim 8, it is characterised in that the radio communication group row also include：Second group of row optical fiber, is connected with the signal processor, the reception light letter sent for transmitting the signal processor Number.
- 10. radio communication group row according to claim 9, it is characterised in that the radio communication group row also include：Optical Communication Terminal, it is connected with second group of row optical fiber, the reception light letter sent for handling second group of row optical fiber Number.
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| CN107786962B (en) | 2020-03-31 |
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