CN108123735A - A kind of mobile terminal device for being used to resist high frequency cable waste - Google Patents
A kind of mobile terminal device for being used to resist high frequency cable waste Download PDFInfo
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- CN108123735A CN108123735A CN201711395376.7A CN201711395376A CN108123735A CN 108123735 A CN108123735 A CN 108123735A CN 201711395376 A CN201711395376 A CN 201711395376A CN 108123735 A CN108123735 A CN 108123735A
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- mobile terminal
- terminal device
- high frequency
- cable waste
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/04—Control of transmission; Equalising
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18502—Airborne stations
Abstract
The present invention provides a kind of mobile terminal device for being used to resist high frequency cable waste, including antenna and optical fiber, further includes with lower unit：It is used to implement the upper-layer protocol of Airborne Terminal equipment and the Base Band Unit of at least one of signaling processing, user face data processing, baseband functions processing and local operation maintenance function；It is used to implement Digital IF Processing, filtering and frequency transformation, power amplifier, duplex or wave filter and the radio frequency unit for receiving at least one of low-noise amplifier；For connecting the ultrashort coaxial RF line of the radio frequency unit and the antenna.Airborne antenna side is installed to by radio frequency unit, the signal between Base Band Unit and radio frequency unit is transmitted with optical fiber, the length of RF cable is greatly reduced, the attenuation of signal is reduced, so as to greatly promote system performance.
Description
Technical field
The present invention relates to the technical field of mobile communication, particularly a kind of mobile terminal for being used to resist high frequency cable waste
Equipment.
Background technology
LTE, that is, Long Term Evolution (timesharing Long Term Evolution) are forth generation (4G) mobile communication technology and standard
One of, technical advantage is embodied in the multiple fields such as rate, time delay and the availability of frequency spectrum so that operator can be in limited frequency
Possess more powerful business in spectrum bandwidth resources and ability is provided, and this target institute that be exactly global mobile communication industry seek assiduously
.
On the other hand, with the continuous development of user data service demand, data service access is provided on aircarrier aircraft
It is more and more urgent with the demand of service.Due to the high cost and capacity limit of satellite communication, base station is disposed by ground, sky is covered
ATG (Air To Ground) beechnut of lid is the efficient ideal solution of civil aviaton's data service.Actually at present
There are the successful Disposition ＆ Operation of ATG systems based on 2G/3G in the world.With the development of LTE technologies and industrial chain,
LTE is increasingly becoming the main force of mobile broadband era, and business and application should also be as being extended to more areas, for example sky is covered
ATG scenes.Base band and radio frequency integrated Airborne Terminal equipment (function similar ground mobile phone terminal) are commonly installed on aircraft,
External airborne antenna is connected by cable and ground base station is communicated, realizes air-ground broadband internet services.
(it is more than 2GHz frequency ranges) for some high band LTE ATG applications, cable waste is often very high, significantly shadow
Link performance and coverage are rung.Particularly, for Airborne Terminal equipment, due to aviation cable diameter usually compared with
It is small, therefore cable waste bigger under high band；Meanwhile for aircarrier aircraft, if Airborne Terminal equipment is mounted on head
Host electronic equipment cabin, and airborne antenna is mounted on tail part, and length of cable is very long at this time, also substantially increases cable
Loss reduces system performance (usually all in more than 10dB).
The application for a patent for invention of Publication No. CN101159933A discloses a kind of separated base station system and device networking side
Method and Base Band Unit separate the Base Band Unit (BBU) of base station with radio frequency unit (RFU) in the system, and be provided on RFU with
BBU interconnection and the baseband radio interface of transmitting data information, so as to form separated base station system.It is and separated in BBU and RFU
On the basis of, while further divide BBU capacity, unit is also separated；It is provided by BBU interface units
Dilatation interface and baseband radio interface, the networking and dilatation of flexible realization BBU can reduce floor space.The system is should
Used in Land-Mobile-Network, split type base station is fixed, it is impossible to integrate split type frenulum unit on mobile terminals.
The content of the invention
In order to solve the technical issues of above-mentioned, the present invention proposes that a kind of mobile terminal for being used to resist high frequency cable waste is set
It is standby, airborne antenna side is installed to by radio frequency unit, the signal between Base Band Unit and radio frequency unit is transmitted with optical fiber, is greatly dropped
The length of low radio frequency cable reduces the attenuation of signal, so as to greatly promote system performance.
The object of the present invention is to provide a kind of for resisting the mobile terminal device of high frequency cable waste, including antenna and light
Line is further included with lower unit：
Base Band Unit：It is used to implement the upper-layer protocol of Airborne Terminal equipment and signaling processing, user face data processing, base band
At least one of function treatment and local operation maintenance function；
Radio frequency unit：Be used to implement Digital IF Processing, filtering and frequency transformation, power amplifier, duplexer filter and
Receive at least one of low-noise amplifier；
Ultrashort coaxial RF line：For connecting the radio frequency unit and the antenna.
Preferably, the Base Band Unit is additionally operable to, by CPRI or other interface protocols, base band I/Q signal be carried
The radio frequency unit of distal end is transferred on optical fiber.
In any of the above-described scheme preferably, the Base Band Unit include memory (DDR), processor (DSP/ARM), can
Program at least one of hardware (FPGA) and photoelectric converter.
In any of the above-described scheme preferably, the work step of the Base Band Unit is as follows：
Step 1：The normal transmission upstream data PUSCH/PUCCH/SRS on subscriber terminal equipment (UE), when recording current
T0 is carved, wherein PUSCH represents uplink control channel, and PUCCH represents Uplink Shared Channel, represents SRS uplink reference signals；
Step 2：TA0 is calculated according to upstream data in base station, and notifies the subscriber terminal equipment；
Step 3：Final TA values TA2 is calculated；
Step 4：Obtain the time synchronization adjustment amount at final T2 moment according to the TA2, and according to this to upstream data into
Row transmitting.
In any of the above-described scheme preferably, the step 3 is led to including setting the TA that the subscriber terminal equipment obtains
Know constantly for T1, set it and provide the moment as T2 using the uplink of this TA, obtain time difference Δ T=T2-T0.
In any of the above-described scheme preferably, the step 3 further includes the movement according to the terminal within the Δ T moment
The TA2 is calculated in distance and its moving direction.
In any of the above-described scheme preferably, the step 3 includes following sub-step：
Step 31：Displacement distance Δ D=s × Δ T in Δ T time is calculated, wherein S represents flying speed；
Step 32：Calculate the corresponding sighting distance distance DO=F (TA0) of the TA0；
Step 33：The horizontal distance at the T2 moment to base station is calculated, formula is：
The horizontal distance of (T0) between terminal and base station when wherein H represents initial；
Step 34：Calculate the sighting distance distance at the T2 moment to base stationWherein, V is high for flight
Degree；
Step 35：Calculate the value of the corresponding TA of the D2, TA2=G (D2).
In any of the above-described scheme preferably, the radio frequency unit include the radio frequency unit include photoelectric converter,
IF processing unit, digital analog converter, filtering and frequency conversion unit, radio frequency amplifier, low-noise amplifier and duplex filtering
At least one of device.
In any of the above-described scheme preferably, the Digital IF Processing is included in possible peak clipping and digital predistortion
It is at least one.
In any of the above-described scheme preferably, the radio frequency unit by SMA, SMB and other antennal interfaces at least
A kind of connection airborne antenna.
In any of the above-described scheme preferably, the Base Band Unit is by LTE or other communications protocol of eating dishes without rice or wine, with ground
Base station network establishes the air-ground connection for including air-ground communication signaling and data connection.
In any of the above-described scheme preferably, after the completion of the air-ground connection is established, data-source device passes through data
Data to be transferred is transferred to the Base Band Unit by interface.
In any of the above-described scheme preferably, the data-source device includes interior video collecting device, external video
At least one of collecting device, internal temperature sensor, external temperature sensor and monitoring radar equipment.
In any of the above-described scheme preferably, the Base Band Unit carries out user plane protocol and base to the data to be transferred
Baseband I Q data is generated after band protocol processes.
In any of the above-described scheme preferably, the server also has is used to resist high frequency cable waste by described
Mobile terminal device the functions of information or data is sent to base station.
In any of the above-described scheme preferably, the Base Band Unit transfers the baseband I Q data by the optical fiber
To the radio frequency unit zoomed out.
In any of the above-described scheme preferably, the radio frequency unit passes through institute after handling the baseband I Q data
It states extremely short coaxial RF line and is sent to the external antenna.
In any of the above-described scheme preferably, the antenna is for completion and the communication of ground base station network.
It is proposed by the present invention a kind of for resisting the mobile terminal device of high frequency cable waste, using separate module on the one hand
Energy saving effect can be played while low signal attenuation is dropped, on the other hand so that the installation position selection of equipment is cleverer
Living, the maintenance of engineering staff and investigation failure are also easier.
Description of the drawings
Fig. 1 is the mould of a preferred embodiment of the mobile terminal device according to the invention for being used to resist high frequency cable waste
Block diagram.
Figure 1A is the mobile terminal device according to the invention for being used to resist high frequency cable waste such as the mould of Fig. 1 embodiments
Block connection figure.
Fig. 2 is an implementation aboard for the mobile terminal device according to the invention for being used to resist high frequency cable waste
The module scheme of installation of example.
Fig. 3 is the mould of a preferred embodiment of the mobile terminal device according to the invention for being used to resist high frequency cable waste
Block diagram.
Fig. 4 is an implementation of the computational methods of the mobile terminal device according to the invention for being used to resist high frequency cable waste
The flow chart of example.
Fig. 4 A are the computational methods of the mobile terminal device according to the invention for being used to resist high frequency cable waste such as Fig. 4
The TA value calculating method flow charts of illustrated embodiment.
Fig. 4 B are the embodiment as shown in Figure 4 of the mobile terminal device according to the invention for being used to resist high frequency cable waste
Data display figure.
Fig. 5 is the original of an embodiment of the TA of the mobile terminal device according to the invention for being used to resist high frequency cable waste
Reason figure.
Fig. 6 is the implementation in high ferro of the mobile terminal device according to the invention for being used to resist high frequency cable waste
The scheme of installation of example.
Fig. 7 is the mobile terminal device according to the invention for being used to resist high frequency cable waste such as the hair of Fig. 1 embodiments
Penetrate data flow figure.
Fig. 7 A are the connecing such as Fig. 1 embodiments of the mobile terminal device according to the invention for being used to resist high frequency cable waste
Receive data flow figure.
Specific embodiment
The present invention is further elaborated with specific embodiment below in conjunction with the accompanying drawings.
Abbreviation
LTE：Long Term Evolution are one of forth generation (4G) mobile communication technology and standard.
ATG：Air To Ground dispose base station by ground and realize the communication system covered to sky.
UE：User Equipment, subscriber terminal equipment.
TA：Timing Advance, Timing Advance.
eNodeB：The base station equipment of Evolved Node B, LTE.
PUCCH：Physical Uplink Control Channel, uplink control channel.
PUSCH：Physical Uplink Shared Channel, Uplink Shared Channel.
SRS：Sounding Reference Signal, uplink reference signals.
CPRI：Common Public Radio Interface come transmission base band by the way of number, are commonly used
Signal transmission between baseband control unit and RF remote unit.
Embodiment one
As shown in Fig. 1,1A, include Base Band Unit 100, optical fiber cable for resisting the mobile terminal device of high frequency cable waste
Road 110, radio frequency unit 120, ultrashort coaxial RF line 130 and antenna 140 form.
Base Band Unit 100 is made of memory 101, DSP/ARM102, FPGA103 and photoelectric converter 104.Base Band Unit master
Realize the upper-layer protocol of Airborne Terminal equipment and signaling processing, user face data processing, baseband functions processing.
Fibre circuit 110 is for connecting Base Band Unit 100 and radio frequency unit 120, for high-speed signal transmission.
Radio frequency unit 120 includes photoelectric converter 121, IF processing unit away from Base Band Unit 100, radio frequency unit 120
122nd, digital analog converter 123, filtering and frequency translation unit 124, radio frequency amplifier and low-noise amplifier 125 and duplex filtering
Device 126 mainly realizes Digital IF Processing (including possible peak clipping, digital predistortion etc.), rf frequency and intermediate frequency
Mutually conversion, power amplifier, duplexer or wave filter receive low-noise amplifier etc.；It is connect by SMA, SMB or other antennas
Mouthful, connect external airborne antenna.
Photoelectric converter 121：Mainly into the conversion of traveling optical signal and electric signal, related photosignal transmission is carried out at the same time
Interface protocol processing.
IF processing unit 122：The mutual conversion for mainly completing baseband signal and digital medium-frequency signal (numerically becomes
Frequency and Digital Down Convert), receive the automatic growth control etc. of signal
Digital analog converter 123：Analog signal is adopted digital signal synthesis analog signal, when receiving when mainly emitting
Sample changes into digital signal etc.
Radio frequency amplifier and low-noise amplifier 125：Amplified signal when the former is transmitting, the latter are that amplification receives when receiving
Reduce additional noise while signal as far as possible
Duplexer filter 126：Isolate transmission path and RX path and filtering useless signal
Ultrashort coaxial RF line 130 is for connecting radio frequency unit 120 and antenna 140, and length is about 0.5 meter, and the length is not
It can cause cable waste.
Antenna 140 is connected by ultrashort coaxial RF line 130 with radio frequency unit 120, is mainly used for being led to transmitting station
Letter, transmitting/reception wireless signal.
Embodiment two
Mobile terminal device for resisting high frequency cable waste is suitably applied the broadband connections of aircraft, especially high
The aircraft (being more than 500Km/h) of speed flight, including flying in high-altitude passenger aircraft, air-ground high-speed aircraft and space
Ship.
As shown in Fig. 2, for resist the mobile terminal device of high frequency cable waste installation aboard.Base Band Unit
200 are mounted on the head section of aircraft, are connected by optical fiber 201 with the radio frequency unit 202 mounted on rear of aircraft, radio frequency unit
203 are connected by extremely short radio-frequency cable with antenna 204.Airborne computer 240 connects airborne ad Hoc wireless network 220, and passenger makes
Passenger's wireless network 230 is connected with smart machine 250, ad Hoc wireless network 220 and ad Hoc wireless network 230 connect onboard services
Device 210, on-board server 210 link Base Band Unit 200 by cable 260.
Embodiment three
As shown in figure 3, airborne communication system includes information acquisition unit 300, video monitor unit 310, aircraft bus number
According to acquisition interface 320, server 330 and mobile terminal device 340 for resisting high frequency cable waste.
Information acquisition unit 300 leads to for gathering the related data information in running at high speed, (including inside and outside)
It crosses aircraft bus data acquisition interface 320 and is sent to server 330 for resisting the mobile terminal device of high frequency cable waste
340。
Video data transmitting is sent to by video monitor unit 310 for gathering the video data information in running at high speed
Server 330 is used to resist the mobile terminal device 340 of high frequency cable waste.
Aircraft bus data acquisition interface 320 is for link information collecting unit 300, video monitor unit 310 and service
Device 330, the mobile terminal device 340 for resisting high frequency cable waste.
Server 330 is used to receiving, analyze and storing data.
Device 340 applied to high-speed mobile communications is used to send real time information and data to base station.
Example IV
Inside LTE communication standard, TA and distance have correspondence, and respectively with distance D=F (TA), TA=G (D) is represented.
As shown in figure 4, performing step 400, UE normal transmission upstream data PUSCH/PUCCH/SRS record current time
T0.Step 410 is performed, TA0 is calculated according to upstream data in base station, and notifies terminal.Step 420 is performed, what terminal obtained
It is T1 at the time of TA is notified, and it is T2 using the uplink emission time of this TA, then obtains time difference Δ T=T2-T0；According to
Final TA values TA2 is calculated in the displacement distance and its moving direction of terminal in the Δ T moment.Step 420 includes following sub-step
Suddenly, (as shown in Figure 4 A)：Step 421 is performed, calculates displacement distance Δ D=s × Δ T in Δ T time, wherein s represents to fly
Scanning frequency degree.Step 422 is performed, calculates the corresponding sighting distance distance D0=F (TA0) of the TA0.Step 423 is performed, is calculated described
The T2 moment, formula was to the horizontal distance of base station：Step 424 is performed, is calculated
The T2 moment is to the sighting distance distance of base stationStep 425 is performed, calculates the corresponding TA's of the D2
Value, TA2=G (D2).
Step 430 is performed, according to the TA2 that above-mentioned steps obtain, obtains the time synchronization adjustment amount at final T2 moment, and
Upstream data is emitted according to this.
As shown in Figure 4 B, the horizontal distance of (T0) between terminal and base station when H represents initial, T0 is current time, and T2 is
Using the uplink emission time of this TA, D0 is the corresponding sighting distance distance D0 of TA0, and D2 is the T2 moment to the sighting distance distance of base station, Δ D
For the displacement distance in Δ T time, V is flying height, generally 8km to 10km.
Embodiment five
LTE, that is, Long Term Evolution (timesharing Long Term Evolution) are forth generation (4G) mobile communication technology and standard
One of, technical advantage is embodied in the multiple fields such as rate, time delay and the availability of frequency spectrum so that operator can be in limited frequency
Possess more powerful business in spectrum bandwidth resources and ability is provided, and this target institute that be exactly global mobile communication industry seek assiduously
.
On the other hand, with the continuous development of user data service demand, data service access is provided on aircarrier aircraft
It is more and more urgent with the demand of service.Due to the high cost and capacity limit of satellite communication, base station is disposed by ground, sky is covered
ATG (Air To Ground) beechnut of lid is the efficient ideal solution of civil aviaton's data service.Actually at present
There are the successful Disposition ＆ Operation of ATG systems based on 2G/3G in the world.With the development of LTE technologies and industrial chain,
LTE is increasingly becoming the main force of mobile broadband era, and business and application should also be as being extended to more areas, for example sky is covered
ATG scenes.
Since the LTE system of standard is in order to which the ordinary user of ground low speed movement designs, if by LTE at a high speed
Mobile scene, such as ATG systems, caused by the main problem faced is exactly high-speed mobile.In general, the cruise of airline carriers of passengers moves
Dynamic speed for 800km/ hours to 1200km/ it is small when.Under this high-speed mobile, the when frequency deviation synchronization side of traditional LTE system
Method needs are improved, and consider the influence of hyper tape, to ensure to the stability of empty covering system and more preferably system performance.
In traditional LTE system, the time synchronization information (Timing Advance TA) of uplink by base station be based on uplink signal into
Row measurement, and inform terminal, terminal from network side receives TA orders, the launch time of adjustment uplink PUCCH/PUSCH/SRS, mesh
Be to eliminate different propagation delay times between UE so that the uplink signal of different UE reaches the time unifying of eNodeB, protects
The orthogonality between uplink user is demonstrate,proved, reduces intra-cell interference.
The concrete principle of TA is as shown in Figure 5.
But in above process there are certain time delay, in conventional LTE system application, terminal is substantially without high-speed mobile
Demand, therefore can ensure that time synchronization information basic guarantee is constant in this time delay.But for high-speed mobiles such as course line coverings
Scene, above-mentioned time delay may have an impact the precision of TA, if TA errors are to a certain extent, base station can not just demodulate terminal
The signal of transmission so as to cause serious consequence, can not recover to communicate such as communication disruption and in the short time.
That TA is actually characterized is the distance between UE and base station side antenna port.It can be by Airborne Terminal compared with base
The displacement distance stood is calculated.In usual network, what TA was calculated is the path that signal is propagated, and is carried out according to terminal displacement distance
Amendment may not accurate and effective.But in ATG networks, since terminal (aircraft) and base station are regarding logical, passed through with direct projection based on,
Therefore it is exactly accurately and effectively by the amendment of displacement distance.
Based on the demand, the application proposes a kind of device and system suitable under high-speed mobile communications scene, the dress
Stable communication can be carried out to correct the TA of base station side feedback with system so as to ensure by putting between terminal and base station.
Embodiment six
Mobile terminal device for resisting high frequency cable waste is equally applicable to high-speed railway and high speed land mobile is set
Standby broadband connections.
As shown in fig. 6, for resisting the mobile terminal device of high frequency cable waste mounted on high ferro.Base Band Unit
600 are mounted on the vehicle head part of the first array carriage of high ferro, pass through optical fiber 610 and the radio frequency mounted on the rear portion of the first array carriage
Unit 620 is connected, and radio frequency unit 620 is connected by extremely short radio-frequency cable with antenna 630.
Embodiment seven
The work of Base Band Unit 710 includes user data processing module, baseband protocol processing module 711 and optic electric interface association
Processing module 712 is discussed, the work of the radio frequency unit 720 zoomed out includes optic electric interface protocol process module 721, Digital IF Processing
Module 722, digital-to-analogue conversion processing module 723, duplexer/wave filter 724 and power amplifier 725.
As shown in Figure 7, it is necessary to which the data sending sent is to after Airborne Terminal, the user data processing module of Airborne Terminal
700 and baseband processing module 710 respectively with according to user face data agreement and base band signal process agreement, export IQ orthogonal datas to
Optic electric interface protocol process module 720.Optic electric interface protocol process module 720 is according to CPRI or other interface protocols to data
It is handled and changes into optical signal, the radio frequency unit 720 of distal end is transmitted data to by optical fiber 730.The light of radio frequency unit 720
Electrical interface protocol process module 721 is converted into the optical signal from Base Band Unit 710 data of electric signal, and is dealt into number
This data digital is up-converted into intermediate-freuqncy signal to data conversion module by frequency processing module 722, Digital IF Processing module 722
723, D/A converter module 723 becomes digital signal synthesis analog signal to filtering and frequency translation module 724, filtering and frequency
Mold changing block 725 is filtered and is converted to radiofrequency signal to the signal received, and power amplifier 725 then amplifies radiofrequency signal
Power is simultaneously sent to duplexer filter 726, and changing into radio wave finally by day bundle of lines signal is dealt into ground fixed base stations 740.
As shown in Figure 7 A, antenna receives the wireless signal from fixed base stations 740, and low noise is arrived through duplexer filter 726
Amplifier 725, the latter amplify this signal output to filtering and frequency translation module 724, and filtering and frequency translation module 724 are right
Signal is filtered and is down-converted to intermediate frequency, and then, intermediate-freuqncy signal is sampled into number by D/A converter module 723 from simulation
Word intermediate-freuqncy signal, digital medium-frequency signal carry out automatic gain processing and Digital Down Convert by Digital IF Processing module 722 again
For I/Q data, optic electric interface protocol process module 721 carries out optic electric interface protocol processes to the I/Q data of electrical signal form and turns
Into optical signal, Base Band Unit 710 is sent to by optical fiber.The optic electric interface protocol process module 712 of Base Band Unit 710 carries out on the contrary
Processing obtain the I/Q data of electrical signal form, obtained I/Q data handles mould by baseband processing module 711 and user face data
Block 700 performs the baseband protocol process opposite with transmission and user face data agreement respectively and obtains final data
Embodiment eight
After device power, the Base Band Unit of Airborne Terminal is by LTE or other communications protocol of eating dishes without rice or wine, with ground base station network
Establish the signaling and data connection of air-ground communication.After the completion of air-ground connection is established, user data or front deck passback on aircraft
Data latency passes data from on-board server or other external data source devices, will by Ethernet interface or other data-interfaces
Data to be transferred is transferred to the Base Band Unit of Airborne Terminal.After Base Band Unit receives, carry out at user plane protocol and baseband protocol
After reason, the I/Q data of base band is generated, according to CPRI interface protocols or other interface protocols, penetrating of zooming out is transferred to by optical fiber
Frequency unit.After radio frequency unit receives base band data, the frame decoding for carrying out interface protocol is handled, Digital IF Processing, and digital-to-analogue conversion is double
After the processing such as work wave filter, radio-frequency power amplifier, external airborne antenna is sent to by antennal interface, is realized and ground base
It stands the communication of network.
Ground ATG network signals direction is received in Airborne Terminal, radio frequency unit passes through after antenna receives radiofrequency signal
After the processing such as low-noise amplifier, duplexer filter, analog-to-digital conversion and digital intermediate frequency, baseband digital signal is produced, is passed through
CPRI or other interface protocols, are carried on optical fiber, are sent to Base Band Unit.Base Band Unit is received to be sent from remote radio unit (RRU)
CPRI or other interface protocols base band I/Q signal after, carry out the frame decoding processing of CPRI or other interface protocols, Baseband Receiver
After processing, user's surface treatment etc. reason, user data is transferred to on-board server or other external datas by Ethernet
Source；Again relative users are distributed to by equipment such as on-board servers.
It is a kind of for resisting the mobile terminal device of high frequency line loss in the application, radio frequency unit is zoomed out into airborne antenna
Near, the Base Band Unit positioned at main equipment cabin is connected to by extremely low-loss optical fiber, cable under high band can be substantially reduced
Loss, the coverage and system performance of ATG systems can be obviously improved.
The advantages of this separate module, in addition to the drop low signal attenuation that front describes, can also play energy saving effect,
I.e. in order to emit same power, discrete mode energy expenditure is many less, usually all lacks more than 50%.It is moreover, discrete
Module so that the installation position selection of equipment is more flexible, and the maintenance of engineering staff and investigation failure are also easier.
The mobile terminal device stated in text except being applied in aviation aircraft, can be also used for land mobile communication,
Such as steamer, high ferro, bus.
For a better understanding of the present invention, it is described in detail above in association with specific embodiments of the present invention, but is not
Limitation of the present invention.Every technical spirit according to the invention still belongs to any simple modification made for any of the above embodiments
In the scope of technical solution of the present invention.In this specification the highlights of each of the examples are it is different from other embodiments it
Locate, the same or similar part cross-reference between each embodiment.For system embodiment, due to itself and method
Embodiment corresponds to substantially, so description is fairly simple, the relevent part can refer to the partial explaination of embodiments of method.
Claims (10)
1. it is a kind of for resisting the mobile terminal device of high frequency cable waste, including antenna and optical fiber, which is characterized in that further include
With lower unit：
Base Band Unit：It is used to implement the upper-layer protocol of Airborne Terminal equipment and signaling processing, user face data processing, baseband functions
At least one of processing and local operation maintenance function；
Radio frequency unit：Digital IF Processing, filtering and frequency transformation, power amplifier are used to implement, duplexing filtering is carried out and connects
Receive at least one of low noise.
Ultrashort coaxial RF line：For connecting the radio frequency unit and the antenna.
2. the mobile terminal device as described in claim 1 for being used to resist high frequency cable waste, it is characterised in that：The base band
Unit is additionally operable to, by CPRI or other interface protocols, base band I/Q signal is carried on to the radio frequency list for being transferred to distal end on optical fiber
Member.
3. the mobile terminal device as claimed in claim 2 for being used to resist high frequency cable waste, it is characterised in that：The base band
Unit includes at least one of memory (DDR), processor (DSP/ARM), programmable hardware (FPGA) and photoelectric converter.
4. the mobile terminal device as claimed in claim 3 for being used to resist high frequency cable waste, it is characterised in that：The base band
The work step of unit is as follows：
Step 1：The normal transmission upstream data PUSCH/PUCCH/SRS on subscriber terminal equipment (UE) records current time T0,
Wherein PUSCH represents uplink control channel, and PUCCH represents Uplink Shared Channel, represents SRS uplink reference signals；
Step 2：TA0 is calculated according to upstream data in base station, and notifies the subscriber terminal equipment；
Step 3：Final TA values TA2 is calculated；
Step 4：The time synchronization adjustment amount at final T2 moment is obtained according to the TA2, and upstream data is sent out according to this
It penetrates.
5. the mobile terminal device as claimed in claim 4 for being used to resist high frequency cable waste, it is characterised in that：The step
3 include set the TA that the subscriber terminal equipment obtains and notify the moment as T1, set uplink granting moment that it applies this TA as
T2 obtains time difference Δ T=T2-T0.
6. the mobile terminal device as claimed in claim 5 for being used to resist high frequency cable waste, it is characterised in that：The step
3, which further include the basis displacement distance of terminal and its moving direction within the Δ T moment, is calculated the TA2.
7. the mobile terminal device as claimed in claim 6 for being used to resist high frequency cable waste, it is characterised in that：The step
3 include following sub-step：
Step 31：Displacement distance Δ D=S × Δ T in Δ T time is calculated, wherein S represents flying speed；
Step 32：Calculate the corresponding sighting distance distance D0=F (TA0) of the TA0；
Step 33：The horizontal distance at the T2 moment to base station is calculated, formula is：Its
The horizontal distance of (T0) between terminal and base station when middle H represents initial；
Step 34：Calculate the sighting distance distance at the T2 moment to base stationWherein, V is flying height；
Step 35：Calculate the value of the corresponding TA of the D2, TA2=G (D2).
8. the mobile terminal device as described in claim 1 for being used to resist high frequency cable waste, it is characterised in that：The radio frequency
Unit includes photoelectric converter, IF processing unit, digital analog converter, filtering and frequency conversion unit, radio frequency amplifier, low noise
At least one of acoustic amplifier and duplexer filter.
9. the mobile terminal device as claimed in claim 8 for being used to resist high frequency cable waste, it is characterised in that：The number
IF process includes at least one of possible peak clipping and digital predistortion.
10. the mobile terminal device as claimed in claim 9 for being used to resist high frequency cable waste, it is characterised in that：It is described to penetrate
Frequency unit connects the airborne antenna by least one of SMA, SMB and other antennal interfaces.
Priority Applications (1)
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| CN201711395376.7A CN108123735A (en) | 2017-12-21 | 2017-12-21 | A kind of mobile terminal device for being used to resist high frequency cable waste |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112436847A (en) * | 2020-12-02 | 2021-03-02 | Oppo广东移动通信有限公司 | Radio frequency L-PA Mid device, radio frequency transceiving system and communication equipment |
| WO2023221724A1 (en) * | 2022-05-18 | 2023-11-23 | 华为技术有限公司 | Baseband processing method and apparatus |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101159933A (en) * | 2005-05-19 | 2008-04-09 | 华为技术有限公司 | Split type base station system and networking method and base band unit thereof |
| US20090209271A1 (en) * | 2004-05-21 | 2009-08-20 | Keith Reed | Mobile device location systems and methods |
| CN102938670A (en) * | 2011-08-15 | 2013-02-20 | 北京为邦远航无线技术有限公司 | Ground-air broadband wireless communication system and method for airplane |
| KR20140120705A (en) * | 2013-04-04 | 2014-10-14 | 한국전자통신연구원 | Mobile Communication System and the Synchronization Method for Mobile-to-Mobile Communications |
| CN106301526A (en) * | 2015-05-19 | 2017-01-04 | 中兴通讯股份有限公司 | A kind of method sending reverse signal and end station |
-
2017
- 2017-12-21 CN CN201711395376.7A patent/CN108123735A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090209271A1 (en) * | 2004-05-21 | 2009-08-20 | Keith Reed | Mobile device location systems and methods |
| CN101159933A (en) * | 2005-05-19 | 2008-04-09 | 华为技术有限公司 | Split type base station system and networking method and base band unit thereof |
| CN102938670A (en) * | 2011-08-15 | 2013-02-20 | 北京为邦远航无线技术有限公司 | Ground-air broadband wireless communication system and method for airplane |
| KR20140120705A (en) * | 2013-04-04 | 2014-10-14 | 한국전자통신연구원 | Mobile Communication System and the Synchronization Method for Mobile-to-Mobile Communications |
| CN106301526A (en) * | 2015-05-19 | 2017-01-04 | 中兴通讯股份有限公司 | A kind of method sending reverse signal and end station |
Non-Patent Citations (2)
| Title |
|---|
| HUAWEI, HISILICON: "On the TA adjustment delay for shortened TTI and reduced processing", 《3GPP TSG-RAN WG4 MEETING #84》 * |
| 朱武: "LTE系统的切换及高速铁路环境下的改进研究", 《中国优秀硕士学位论文全文数据库》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112436847A (en) * | 2020-12-02 | 2021-03-02 | Oppo广东移动通信有限公司 | Radio frequency L-PA Mid device, radio frequency transceiving system and communication equipment |
| CN112436847B (en) * | 2020-12-02 | 2022-05-17 | Oppo广东移动通信有限公司 | Radio frequency L-PA Mid device, radio frequency transceiving system and communication equipment |
| WO2023221724A1 (en) * | 2022-05-18 | 2023-11-23 | 华为技术有限公司 | Baseband processing method and apparatus |
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