CN110233705A - Signal transmission system based on communication - Google Patents
Signal transmission system based on communication Download PDFInfo
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- CN110233705A CN110233705A CN201910500307.0A CN201910500307A CN110233705A CN 110233705 A CN110233705 A CN 110233705A CN 201910500307 A CN201910500307 A CN 201910500307A CN 110233705 A CN110233705 A CN 110233705A
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- China
- Prior art keywords
- data
- transmitting module
- radio receiving
- receiving transmitting
- buffer area
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/568—Storing data temporarily at an intermediate stage, e.g. caching
Abstract
Present disclose provides a kind of signal transmission systems based on communication, comprising: the first wireless telecom equipment, the first wireless telecom equipment include the first radio receiving transmitting module, and the first radio receiving transmitting module includes the first physical data buffer area；The data that first radio receiving transmitting module receives enter the first physical data buffer area；Data type judgement is carried out to the data entered in the first physical data buffer area, when the data type of the data received is characterized data type, the data received are temporarily stored in the first physical data buffer area, when the data type of the data received is non-feature data types, the first radio receiving transmitting module immediately goes out the data forwarding received.
Description
Technical field
The disclosure belongs to wireless communication technology field.This disclosure relates to which a kind of signal based on communication transmits system
System.
Background technique
In present space rocket testing field, traditional wired communication mode is communicated to arrow mostly or uses, than
Such as RS422, RS485,1553B, CAN, Ethernet bus form.Due to considering safety factor, ground side launching control system is general
Headend equipment and rear end equipment can be divided into, front and back end equipment is at a distance of several kilometers, and the two is connected by optical cable, to reach remote
The purpose of control.Traditional arrow the most apparent drawback of communication mode be: equipment constitute it is many and diverse, the communications cable is tediously long, communication
Distance is limited, communication type is single.
With being continuously increased for Rocket test demand, traditional arrow communication type be not limited to simply control and
Data command, video surveillance signal, audio controls, wireless sensor signal are also gradually added into Rocket test.This
The common feature of a little signals is that data volume is big, randomness is strong, real-time is high.In face of the demand of multi-signal simultaneous transmission, tradition
Wired communication mode the needs of being difficult to meet by polymorphic type signal by single equipment simultaneous transmission, if it is desired to transmit, just
System architecture must be changed, increases corresponding communication device, can bring about great cost burden in this way.And common communication party
Formula transmission range is generally shorter, if it is desired to remote transmission, it is necessary to increase fibre optic transmission equipment, not only bring arrangement in this way
With the cumbersome process for removing the time receiving, intermediate conveyor link is also added, uncertain factor is brought.Single in face of classical signal transmission,
The short drawback of transmission range, can very good solution using wireless communication technique.
Wireless communication technique (Wireless communication) can be passed in free space using electromagnetic wave signal
The characteristic broadcast carries out a kind of communication mode of information exchange, is applied earliest in fields such as Internet of Things, unmanned plane and unmanned vehicles, can be with
Single-point is completed to the wireless data link of single-point and single point-to-multipoint networking mode.According to present application scenarios, wireless communication
Technology has very much, is broadly divided into two classes, and one kind is the short-range communication techniques such as ZigBee, Wi-Fi, bluetooth, Z-wave；It is another kind of
It is low-power consumption wide area network (low-power Wide-Area Network, LPWAN), i.e. wan communication technology.LPWAN again may be used
Be divided into two classes: one kind is operate on unlicensed spectrum technology, such as LoRa；It is another kind of to be operate on authorization spectrum technology, such as GPRS.
Summary of the invention
At least one of in order to solve the above-mentioned technical problem, present disclose provides a kind of letters based on communication
Number Transmission system, with being particularly suitable as arrow multi signal Transmission system.The signal transmission based on communication of the disclosure
System is achieved through the following technical solutions.
Signal transmission system based on communication, comprising: the first wireless telecom equipment, the first wireless telecom equipment
Including the first radio receiving transmitting module, the first radio receiving transmitting module includes the first physical data buffer area；First radio receiving transmitting module
The data received enter the first physical data buffer area；Data class is carried out to the data entered in the first physical data buffer area
The data received when the data type of the data received is characterized data type, are temporarily stored in the first physics by type judgement
Data buffer area, when the data type of the data received is non-feature data types, the first radio receiving transmitting module immediately will
The data forwarding received is gone out.
According at least one embodiment of the disclosure, when the first physical data buffer area is by the data of feature data types
When filling up, the first radio receiving transmitting module goes out the data forwarding in the first physical data buffer area.
It further include the second wireless telecom equipment, the second wireless telecom equipment according at least one embodiment of the disclosure
Including the second radio receiving transmitting module, the second radio receiving transmitting module includes the second physical data buffer area；Second radio receiving transmitting module
The data received enter the second physical data buffer area；Data class is carried out to the data entered in the second physical data buffer area
The data received when the data type of the data received is characterized data type, are temporarily stored in the second physics by type judgement
Data buffer area, when the data type of the data received is non-feature data types, the second radio receiving transmitting module immediately will
The data forwarding received is gone out.
According at least one embodiment of the disclosure, when the second physical data buffer area is by the data of feature data types
When filling up, the second radio receiving transmitting module goes out the data forwarding in the second physical data buffer area.
According at least one embodiment of the disclosure, feature data types are video data.
According at least one embodiment of the disclosure, during receiving the data of feature data types, if connect
The data of non-feature data types are received, the first radio receiving transmitting module is immediately by the data forwarding in the first physical data buffer area
It goes out.
According at least one embodiment of the disclosure, during receiving the data of feature data types, if connect
The data of non-feature data types are received, the second radio receiving transmitting module is immediately by the data forwarding in the second physical data buffer area
It goes out.
According at least one embodiment of the disclosure, the first wireless telecom equipment further includes characteristic type host and Fei Te
Type host is levied, the first physical data buffer area is filled the data forwarding of full feature data types by the first radio receiving transmitting module
Characteristic type host is given, the data of the non-feature data types received are forwarded immediately to non-feature by the first radio receiving transmitting module
Type host.
According at least one embodiment of the disclosure, the second wireless telecom equipment further includes characteristic type host and Fei Te
Type host is levied, the second physical data buffer area is filled the data forwarding of full feature data types by the second radio receiving transmitting module
Characteristic type host is given, the data of the non-feature data types received are forwarded immediately to non-feature by the second radio receiving transmitting module
Type host.
According at least one embodiment of the disclosure, characteristic type host is the host for handling video data, non-feature
Type host is the host for not handling video data.
According at least one embodiment of the disclosure, the first wireless telecom equipment includes an at least non-characteristic type master
Machine, the second wireless telecom equipment include an at least non-characteristic type host.
According at least one embodiment of the disclosure, the first wireless telecom equipment includes first antenna device, the second nothing
Line communication equipment includes the second antenna assembly.
According at least one embodiment of the disclosure, first antenna device uses active and standby dual redundant omnidirectional antenna.
According at least one embodiment of the disclosure, the second antenna assembly is configured using active and standby dual redundant mode；
Primary antenna is configured to special-shaped cyclic annular directional aerial, and is divided into four sub-antennas, is uniformly embedded into four quadrants, each sub-antenna
Main lobe angle is greater than 90 °；Backup Antenna is configured to isotropic receiving antenna.
According at least one embodiment of the disclosure, the first radio receiving transmitting module and the second radio receiving transmitting module are all made of
Single carrier frequency domain equalization waveform is as physical transfer waveform.
Detailed description of the invention
Attached drawing shows the illustrative embodiments of the disclosure, and it is bright together for explaining the principles of this disclosure,
Which includes these attached drawings to provide further understanding of the disclosure, and attached drawing is included in the description and constitutes this
Part of specification.
Fig. 1 is the schematic frame according to the signal transmission system based on communication of one embodiment of the disclosure
Figure.
Fig. 2 is according to the schematic of the signal transmission system based on communication of disclosure another embodiment
Block diagram.
Fig. 3 be according to the signal transmission system based on communication of one embodiment of the disclosure applied to arrow
The system schematic block diagram of multi signal transmission.
Fig. 4 be according to the signal transmission system based on communication of one embodiment of the disclosure applied to arrow
The signal of multi signal transmission transmits schematic diagram.
Specific embodiment
The disclosure is described in further detail with embodiment with reference to the accompanying drawing.It is understood that this place
The specific embodiment of description is only used for explaining related content, rather than the restriction to the disclosure.It also should be noted that being
Convenient for description, part relevant to the disclosure is illustrated only in attached drawing.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the disclosure can
To be combined with each other.The technical solution of the disclosure is described in detail below with reference to the accompanying drawings and in conjunction with embodiment.
Unless otherwise stated, illustrative embodiments/the embodiment shown, which will be understood as providing, to be practiced
The example feature of the various details of some modes of the middle technical concept for implementing the disclosure.Therefore, unless otherwise stated,
In the case where not departing from the technical concept of the disclosure, the feature of various embodiment/embodiments can additionally organize splitting or integrating
From, exchange and/or rearrange.
It is commonly used in being apparent from the boundary between adjacent component using intersecting hachure and/or shade in the accompanying drawings.Such as
This, unless explanation, otherwise specific material, the material to component are not conveyed or are indicated in the presence or absence of intersecting hachure or shade
Matter, size, ratio, any other characteristic of the general character between the component that shows and/or component, attribute, property etc. it is any partially
Good or requirement.In addition, in the accompanying drawings, for clear and/or descriptive purpose, the size of component can be exaggerated and with respect to ruler
It is very little.It, can be suitable to execute specific technique to be different from described sequence when differently exemplary embodiment can be implemented
Sequence.For example, can be performed simultaneously substantially or execute two techniques continuously described with the sequence opposite with described sequence.
In addition, same appended drawing reference indicates same component.
When a component be referred to as " " another component "upper" or " on ", " being connected to " or " being integrated to " another component
When, the component can directly on another component, be directly connected to or be bonded directly to another component, or can be with
There are intermediate members.However, when component is referred to as " directly existing " another component "upper", " being directly connected to " or " being bonded directly to "
When another component, intermediate member is not present.For this purpose, term " connection " can refer to physical connection, electrical connection etc., and have or
Without intermediate member.
For descriptive purpose, the disclosure can be used such as " ... under ", " in ... lower section ", " ... under ",
"lower", " in ... top ", "upper", " ... on " space of " higher " and " side (for example, such as in " side wall ") "
Relative terms, thus to describe the relationship of a component and another (other) components as shown in figures.In addition to being retouched in attached drawing
Except the orientation drawn, spatially relative term alsos attempt to the different direction comprising equipment in use, operation and/or manufacture.For example,
If the equipment in attached drawing is reversed, the component for being described as " " other components or feature " below " or " under " will be subsequent
It is positioned as " " described other components or feature " top ".Therefore, exemplary term " in ... lower section " may include " on
Side " and " lower section " two kinds of orientation.In addition, in addition equipment can be positioned (for example, being rotated by 90 ° or at other orientation), such as
This, is interpreted accordingly space used herein and describes language relatively.
Term used herein is the purpose in order to describe specific embodiment, and is not intended to be restrictive.Such as institute here
It uses, unless the context clearly indicates otherwise, otherwise singular " one (kind, person) " and " (being somebody's turn to do) " are also intended to packet
Include plural form.In addition, when using term "comprising" and/or " comprising " and their modification in the present specification, explanation
In the presence of feature, entirety, step, operation, component, component and/or their group stated, but one is not precluded the presence or addition of
Or more other feature, entirety, step, operation, component, component and/or their group.It is also noted that as made here
, term " substantially ", " about " be used as approximate term with other similar terms and be not used as degree term, in this way,
They be used to explain it will be appreciated by those of ordinary skill in the art that measured value, calculated value and/or the value of offer it is intrinsic partially
Difference.
Fig. 1 is the schematic frame according to the signal transmission system based on communication of one embodiment of the disclosure
Figure.Signal transmission system 100 based on communication, comprising: the first wireless telecom equipment 101, the first wireless communication are set
Standby includes the first radio receiving transmitting module 1011, and the first radio receiving transmitting module includes the first physical data buffer area 10111；First nothing
The data that line transceiver module 1011 receives enter the first physical data buffer area 10111；It is cached to the first physical data is entered
Data in area 10111 carry out data type judgement will connect when the data type of the data received is characterized data type
The data received are temporarily stored in the first physical data and cache 10111st area, when the data type of the data received is non-characteristic
When type, the first radio receiving transmitting module 1011 immediately goes out the data forwarding received.
It will be appreciated by those skilled in the art that physical data buffer area can be the physical memory of radio receiving transmitting module, nothing
Line transceiver module is the device with reception of wireless signals and wireless signal transmitting (transmission), and disclosure above embodiment is not
The type or model of radio receiving transmitting module are limited, as long as being able to achieve reception of wireless signals and wireless signal transmitting.
Feature data types refer to the data type for being different from non-feature data types in wireless communications, characteristic
Type can be preset, for example, rocket arrow in multi-signal communication process, the type of communication data may include: arrow
Ground Communication Control data flow, video data stream, is defended and leads location data stream etc. measured parameter data stream, and different data streams are with difference
Interface form import communication link module (i.e. radio receiving transmitting module), communication link module preferably use time division duplex form into
Row data receiver according to demand organically combines numerous data flows.Height priority version is taken in the transmitting-receiving of data,
Different data streams are set to the priority of different stage according to significance level, and data flow of high importance is set as high preferential
Grade, the lower data flow of importance is set as low priority, to guarantee that the other data flow of high priority is preferentially responded.According to
This principle, in arrow in multi signal transmission process, priority level is from high to low successively are as follows: Communication Control stream is defended and leads positioning number
According to stream, measured parameter data stream, (high definition) video data stream.In present embodiment, (high definition) video data stream is set as special
Levy data type: 1011 pairs of the radio receiving transmitting module data entered in the first physical data buffer area 10111 carry out data type
The video data received is temporarily stored in the first physics number when the data type of the data received is video data by judgement
According to 10111st area are cached, when the data type of the data received is not video data, the first radio receiving transmitting module 1011 is immediately
The data forwarding received is gone out.
Preferably, when the first physical data buffer area 10111 is filled up by the data of feature data types, the first wireless receipts
Hair module 1011 goes out the data forwarding in the first physical data buffer area 10111.When feature data types are video datas
When, when the first physical data buffer area 10111 is filled up by video data, the first radio receiving transmitting module 1011 is by the first physics number
It goes out according to the data forwarding in buffer area 10111.Present embodiment is not particularly limited to feature data types, this field skill
Art personnel can suitably be set according to the type of actual communication data.
The realization process of above embodiment is more fully described, first at communication link module (i.e. radio receiving transmitting module)
In open up a certain size physical data buffer area and first determine whether data type when there is data to enter, if data are serial
RS422 data (non-video data), then data are sent at once after entering buffer area, to guarantee timeliness；If data class
Type is video data, then data are temporarily stored in buffer area after entering buffer area, is retransmited after waiting data buffer area filling full, the phase
Between if receiving serial RS422 data (non-video data), it is full regardless of whether buffer area fills, be intended to send at once.
In actual wireless communication transmission process, in addition to the slow fading close with distance and hiding relation, there is also the rapid fading of time-varying,
Cause reception level constantly fluctuating, therefore generally can consider centainly to receive allowance in application, according to actual measurement transmission of video
Application experience, allowance often has packet loss phenomenon in 0~5dB；Allowance has packet loss in 5~10dB once in a while, for
Occasion that is of less demanding or can retransmitting, it is already possible to receive；When allowance is greater than 10dB, not packet loss substantially.Somewhere is chosen to carry out
L-G simulation test, simulation result confidence interval are set as 90%, obtain from simulation result, in effective communication distance 2km, fire
Arrow ground and lift-off after can with control point normal communication, and link margin be greater than 30dB, it is ensured that normal communication.
The first wireless telecom equipment 101 in present embodiment can be only fitted on arrow, as wireless telecom equipment on arrow,
Also it can be only fitted to ground, as terrestrial wireless communication equipment.
First wireless telecom equipment 101 further includes characteristic type host and non-characteristic type host, the first wireless receiving and dispatching mould
Block 1011 gives the data forwarding that the first physical data buffer area 10111 fills full feature data types to characteristic type host,
The data of the non-feature data types received are forwarded immediately to non-characteristic type host by the first radio receiving transmitting module 1011.The
One wireless telecom equipment 101 can also include first antenna device；First radio receiving transmitting module 1011 passes through first antenna device
Carry out the reception of data and the forwarding of data.First antenna device preferably uses active and standby dual redundant omnidirectional antenna.
When video data is set as feature data types by above embodiment, characteristic type host is processing video counts
According to host, non-characteristic type host is the host for not handling video data.Characteristic type host is, for example, to browse computer, non-
Characteristic type host is, for example, to defend to lead positioning device and/or display and control terminal.
It is highly preferred that during receiving the data of feature data types, if receiving non-feature data types
Data, the first radio receiving transmitting module 1011 immediately go out the data forwarding in the first physical data buffer area 10111.
Fig. 2 is the schematic frame according to the signal transmission system based on communication of one embodiment of the disclosure
Figure.Signal transmission system 200 based on communication, comprising: the first wireless telecom equipment 101, the first wireless communication are set
Standby includes the first radio receiving transmitting module 1011, and the first radio receiving transmitting module includes the first physical data buffer area 10111；First nothing
The data that line transceiver module 1011 receives enter the first physical data buffer area 10111；It is cached to the first physical data is entered
Data in area 10111 carry out data type judgement will connect when the data type of the data received is characterized data type
The data received are temporarily stored in the first physical data and cache 10111st area, when the data type of the data received is non-characteristic
When type, the first radio receiving transmitting module 1011 immediately goes out the data forwarding received；Second wireless telecom equipment 201, the
Two wireless telecom equipments 201 include the second radio receiving transmitting module 2011, and the second radio receiving transmitting module 2011 includes the second physics number
According to buffer area 20111；The data that second radio receiving transmitting module 2011 receives enter the second physical data buffer area 20111；It is right
Data type judgement is carried out into the data in the second physical data buffer area 20111, when the data type of the data received
When being characterized data type, the data received are temporarily stored in the second physical data buffer area 20111, when the data received
When data type is non-feature data types, the second radio receiving transmitting module 2011 immediately goes out the data forwarding received.
Preferably, when the second physical data buffer area 20111 is filled up by the data of feature data types, the second wireless receipts
Hair module 2011 goes out the data forwarding in the second physical data buffer area 20111.
More specifically, the first wireless telecom equipment 101 includes characteristic type host and non-characteristic type host, first is wireless
First physical data buffer area 10111 is filled the data forwarding of full feature data types to characteristic type by transceiver module 1011
The data of the non-feature data types received are forwarded immediately to non-characteristic type master by host, the first radio receiving transmitting module 1011
Machine.First wireless telecom equipment 101 includes first antenna device；First radio receiving transmitting module 1011 by first antenna device into
The reception (such as receiving the data from the second wireless telecom equipment 201) and the forwarding of data of row data (are transmitted to the first nothing
The characteristic type host of line communication equipment 101 or non-characteristic type host).
When video data is set as feature data types by above embodiment, the spy of the first wireless telecom equipment 101
Levying type host is, for example, to browse computer, and non-characteristic type host is, for example, to defend to lead positioning device and/or display and control terminal.
Second wireless telecom equipment 201 includes characteristic type host and non-characteristic type host, the first radio receiving transmitting module
2011 give the data forwarding that the first physical data buffer area 20111 fills full feature data types to characteristic type host, the
The data of the non-feature data types received are forwarded immediately to non-characteristic type host by two radio receiving transmitting modules 2011.Second
Wireless telecom equipment 201 includes the second antenna assembly；Second radio receiving transmitting module 2011 carries out data by the second antenna assembly
Reception (such as receive data from the first wireless telecom equipment 101) and the forwarding of data (be transmitted to the second wireless communication
The characteristic type host of equipment 201 or non-characteristic type host).
When video data is set as feature data types by above embodiment, characteristic type host is processing video counts
According to host, non-characteristic type host is the host for not handling video data.The characteristic type master of second wireless telecom equipment 201
Machine is, for example, that arrow carries camera, and non-characteristic type host is, for example, that navigation positional device and/or arrow carry and fly control machine.
It is highly preferred that the first radio receiving transmitting module 1011 is immediately by if receiving the data of non-feature data types
Data forwarding in one physical data buffer area 10111 is gone out.During receiving the data of feature data types, if connect
The data of non-feature data types are received, the second radio receiving transmitting module 2011 immediately will be in the second physical data buffer area 20111
Data forwarding go out.
First antenna device preferably uses active and standby dual redundant omnidirectional antenna.
Second antenna assembly is preferably configured using active and standby dual redundant mode；Primary antenna is configured to special-shaped circular-oriented day
Line, and it is divided into four sub-antennas, it is uniformly embedded into four quadrants, each sub-antenna main lobe angle is greater than 90 °；Backup Antenna is matched
It is set to isotropic receiving antenna.
Preferably, 1011 pieces of the first wireless receiving and dispatching mould and the second radio receiving transmitting module 2011 are all made of single carrier frequency domain equalization
Waveform is as physical transfer waveform.
Fig. 3 and Fig. 4 is that applied to arrow multi signal passes by the signal transmission system based on communication of the disclosure
The system framework schematic diagram and data of defeated scene transmit schematic diagram.Radio receiving transmitting module is in the disclosure based on side wireless communication
Central role is played in the signal transmission system of formula, is Unified Device in hardware design, software set-up mode can be passed through
The role of wireless module is set, cooperation antenna is the wireless two-way data link that can provide on arrow between ground.Wireless receiving and dispatching mould
Block is standard IP communications link, can carry out the functions such as networking and relay transmission, supports multimachine relaying, aerial networking, more ground
It stands the functions such as networking.Transmitting-receiving both links are included, are made of respectively power amplifier, low noise circuit, transmit-receive switch.According to assembly
The difference of position and transmission power can have different selections in shape and device.Radio receiving transmitting module supports Transistor-Transistor Logic level at present
The interfaces such as serial ports, RS232, RS422, Ethernet, SDI, Micro HDMI, it is ensured that can be led to most of test host
Letter.Radio receiving transmitting module preferably uses advanced SCFDE (single carrier frequency domain equalization) algorithm, double antenna space diversity reception, MRC
(Maximal ratio combiner) technology has good ability of anti-multipath and anti-Doppler effect capability；Forward error correction coding use with
The identical low density parity check code of 5G standard (LDPC) has the decoding capability close to Shannon threshold, greatly improves and connect
Receive sensitivity；The H.265 coding/decoding module of integrated fine definition and ultralow delay, highest support 1080p@60fps.Wireless receiving and dispatching
For module using single carrier frequency domain equalization (SCFDE) waveform as physical transfer waveform, which is the uplink waveform of LTE, is suitble to
It is applied under anti-interference, low-power consumption environment.Physical layer uses fast frequency-domains processing technique and the MAC such as modulation, coding, equilibrium
(media Access Control) layer control technology.Design has multiple packet data subframes, packet data subframe in frame structure
It can be according to the demand assignment of traffic scheduling to upstream or downstream.Ascending packet data subframe can distribute to different terminals,
In order to support different videos, voice-and-data business, the scheduling strategy of various radio resources different.In transmitting terminal, physical layer
Complete data scrambling code, channel coding, framing, quadrature amplitude modulation (QAM) mapping, up-sampling and root raised cosine filtering
(SRRC), it is converted to complex base band analog signal by D/A, is exported using up-conversion and power amplifier.In receive process, use
Simultaneous techniques forward, receiver, which synchronizes, to be eliminated the reliance on phaselocked loop and synchronizes, and synchronizing speed is fast, and there is no lose caused by deep fade
Lock problem.In addition, causing channel time-varying to adapt to high-speed motion, receiver is used to be calculated based on RLS (least square method of recursion)
The channel tracking of method can support high-speed motion environment.This characteristic in multiple unmanned planes, have on man-machine and helicopter platform
It is verified, most fast platform speed is greater than 800km/h.Radio receiving transmitting module can carry out parameter by web page access mode and set
It sets, the preferential L-band for selecting frequency range relatively high, communication frequency selects 1.4GHz, and traffic rate is supported to be not less than 5Mbps.Nothing
Line transceiver module preferably includes two radio-frequency joints, collectively forms double antenna space diversity reception mode, and reception is better than list
Antenna mode.Video interface can choose SDI, Micro HDMI, ether web form, support the full HD video input of 1080p, number
It detects and switches automatically according to type.Antenna is very sensitive to installation environment, to guarantee that antenna transmission path cannot be stopped on arrow, together
When to consider that the flight inclination angle of rocket also has certain loss to antenna gain.To further increase antenna gain, in rocket long distance
Directional aerial is used when from communication, directional aerial is wireless using the micro-strip oscillator plate antenna for having certain orientation, such as at this
In Transmission system, antenna has different shape and gain according to electrical characteristics and matching requirements.Antenna uses active and standby dual redundant on arrow
Mode, to increase, signal is received and launcher reliability, primary antenna are designed to that special-shaped cyclic annular directional aerial, antenna are divided into four sub- days
Line is uniformly embedded into four quadrants, and each sub-antenna main lobe angle is greater than 90 °, guarantees that antenna gain is equal in all directions
Not less than 2dBi, it is ensured which kind of posture no matter rocket keep can be with ground efficient communication, efficient communication in flight course
Distance is not less than 2km.Backup Antenna is isotropic receiving antenna, receives normal communication instruction and urgent system control letter that ground is sent
Number, ground is improved in face of the control ability of electrical system on arrow.Ground-plane antenna uses active and standby dual redundant glass reinforced plastic omnidirectional antenna, installation
When be fixed on tripod by bottom thread hole.Since arrow carries, antenna gain is lower, and ground is needed using the complete of higher gain
To antenna, omnidirectional antenna gain design is 7dBi, since omnidirectional antenna is easy to be influenced by ground, can use tripod ground
Antenna holder is high, to eliminate ground interference.
The signal transmission system based on communication of the disclosure can also be applied to other occasions, such as unmanned plane
Communication, marine vessel and communication of land control device of communication, unmanned vehicle and controlling terminal with controlling terminal, etc..
In the description of this specification, reference term " one embodiment/mode ", " some embodiment/modes ", " show
The description of example ", " specific example " or " some examples " etc. mean to combine the specific features of the embodiment/mode or example description,
Structure, material or feature are contained at least one embodiment/mode or example of the application.In the present specification, to upper
The schematic representation for stating term is necessarily directed to identical embodiment/mode or example.Moreover, the specific features of description,
Structure, material or feature can be combined in any suitable manner in any one or more embodiment/modes or example.In addition,
Without conflicting with each other, those skilled in the art can by different embodiment/modes described in this specification or
Example and different embodiment/modes or exemplary feature are combined.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present application, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
It will be understood by those of skill in the art that above embodiment is used for the purpose of clearly demonstrating the disclosure, and simultaneously
Non- be defined to the scope of the present disclosure.For those skilled in the art, may be used also on the basis of disclosed above
To make other variations or modification, and these variations or modification are still in the scope of the present disclosure.
Claims (10)
1. a kind of signal transmission system based on communication characterized by comprising
First wireless telecom equipment, the first wireless telecom equipment include the first radio receiving transmitting module, the first wireless receiving and dispatching mould
Block includes the first physical data buffer area；
The data that first radio receiving transmitting module receives enter the first physical data buffer area；
Data type judgement is carried out to the data entered in the first physical data buffer area, when the data type of the data received
When being characterized data type, the data received are temporarily stored in the first physical data buffer area, when the data received
When data type is non-feature data types, first radio receiving transmitting module immediately goes out the data forwarding received.
2. signal transmission system according to claim 1, which is characterized in that when the first physical data buffer area is special
When the data of sign data type are filled up, first radio receiving transmitting module turns the data in the first physical data buffer area
It sends out.
3. signal transmission system according to claim 1 or 2, which is characterized in that it further include the second wireless telecom equipment, the
Two wireless telecom equipments include the second radio receiving transmitting module, and second radio receiving transmitting module is cached including the second physical data
Area；
The data that second radio receiving transmitting module receives enter the second physical data buffer area；
Data type judgement is carried out to the data entered in the second physical data buffer area, when the data type of the data received
When being characterized data type, the data received are temporarily stored in the second physical data buffer area, when the data received
When data type is non-feature data types, second radio receiving transmitting module immediately goes out the data forwarding received.
4. signal transmission system according to claim 3, which is characterized in that when the second physical data buffer area is special
When the data of sign data type are filled up, second radio receiving transmitting module turns the data in the second physical data buffer area
It sends out.
5. signal transmission system according to any one of claim 1 to 4, which is characterized in that the feature data types
For video data.
6. signal transmission system according to claim 1 or 2, which is characterized in that in the data for receiving feature data types
During, if receiving the data of non-feature data types, the first radio receiving transmitting module immediately delays the first physical data
The data forwarding deposited in area is gone out.
7. signal transmission system according to claim 3 or 4, which is characterized in that in the data for receiving feature data types
During, if receiving the data of non-feature data types, the second radio receiving transmitting module immediately delays the second physical data
The data forwarding deposited in area is gone out.
8. signal transmission system according to claim 1 or 2, which is characterized in that first wireless telecom equipment also wraps
Characteristic type host and non-characteristic type host are included, first radio receiving transmitting module fills out the first physical data buffer area
The data forwarding for the feature data types being full of gives the characteristic type host, and first radio receiving transmitting module will receive
The data of non-feature data types are forwarded immediately to the non-characteristic type host.
9. signal transmission system according to claim 3 or 4, which is characterized in that second wireless telecom equipment also wraps
Characteristic type host and non-characteristic type host are included, second radio receiving transmitting module fills out the second physical data buffer area
The data forwarding for the feature data types being full of gives the characteristic type host, and second radio receiving transmitting module will receive
The data of non-feature data types are forwarded immediately to the non-characteristic type host.
10. signal transmission system according to claim 8 or claim 9, which is characterized in that the characteristic type host is processing view
The host of frequency evidence, the non-characteristic type host are the host for not handling video data.
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