CN109617594A - The instruction wireless transmission system for images and method of frequency division multiple access and time division multiple acess hybrid scheme - Google Patents
The instruction wireless transmission system for images and method of frequency division multiple access and time division multiple acess hybrid scheme Download PDFInfo
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- CN109617594A CN109617594A CN201811550977.5A CN201811550977A CN109617594A CN 109617594 A CN109617594 A CN 109617594A CN 201811550977 A CN201811550977 A CN 201811550977A CN 109617594 A CN109617594 A CN 109617594A
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- signal processing
- downlink
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- uplink
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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
- H04B7/18506—Communications with or from aircraft, i.e. aeronautical mobile service
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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
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18515—Transmission equipment in satellites or space-based relays
Abstract
The present invention provides the instruction wireless transmission system for images and method of a kind of frequency division multiple access and time division multiple acess hybrid scheme, and uplink uses time division multiple acess regime transmissions director data, and downlink uses frequency division multiple access regime transmissions image data.Uplink signal processing module carries out processing formation to director data, and uplink emits signal all the way, and the receiving channel of transmission channel, downlink radio frequency module successively through upstream radio-frequency module is sent to downlink signal processing module；If the receiving channel of transmission channel, upstream radio-frequency module successively through downlink radio frequency module is sent to uplink signal processing module if downlink signal processing module pair main line image data carries out processing formation main line downlink signal.The present invention uses time division multiple acess system using asymmetric system, i.e. uplink, and downlink uses frequency division multiple access system, to realize multichannel director data and image data parallel transmission.
Description
Technical field
The present invention relates to the wireless communication transmissions of data and image, specially frequency division multiple access and time division multiple acess hybrid scheme
Instruct wireless transmission system for images and method.
Background technique
Currently, instruction wireless transmission system for images is for data and image wireless information during guided missile or unmanned plane during flying
Transmission.
Currently, in the market general data and wireless transmission system for images using time division multiple access way transmission director data and
Image data can only realize the transmission of single-pass data and image, needs when being wirelessly transferred at the same time to multiple target images
More set equipment work together, and system cost is expensive, volume is big, power consumption is big, Collaborative Control difficulty is big.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention provides the finger of a kind of frequency division multiple access and time division multiple acess hybrid scheme
Wireless transmission system for images and method are enabled, can be realized data and image multichannel simultaneous transmission.
The present invention is to be achieved through the following technical solutions:
The instruction image radio transmitting method of frequency division multiple access and time division multiple acess hybrid scheme, uplink use time division multiple acess system
Director data is transmitted, downlink uses frequency division multiple access regime transmissions image data.
Preferably, uplink director data all the way, four tunnel image data of downlink parallel transmission.
Preferably, uplink signal transmissions process specifically: uplink signal processing module carries out framing, channel to director data
Coding, modulation and upconversion process form uplink transmitting signal all the way and send the transmission channel of supreme row radio-frequency module；Uplink
The transmission channel of radio-frequency module receives the transmitting signal of uplink all the way that uplink signal processing module is sent and is filtered and amplifies,
Then the receiving channel through downlink radio frequency module receives and is sent to downlink signal processing module, the docking of downlink signal processing module
The transmitting signal of uplink all the way received carries out down coversion, demodulation, channel decoding, frame decoding and protocol analysis processing and obtains director data；
Downlink signal transmission process specifically: if downlink signal processing module pair main line image data carries out compression of images volume
If code, framing, channel coding, modulation and upconversion process form main line downlink signal and are sent to downlink radio frequency module
Transmission channel；If the transmission channel of downlink radio frequency module receives the main line downlink signal of downlink signal processing module transmission simultaneously
It is filtered and amplifies, the receiving channel then through upstream radio-frequency module receives and sends supreme row signal processing module；Uplink
If signal processing module is downconverted to the main line downlink signal received, demodulation, channel decoding, frame decoding and image decompression
It is shown if main line parallel image is completed in contracting.
The instruction wireless transmission system for images of frequency division multiple access and time division multiple acess hybrid scheme, including uplink signal handle mould
Block, upstream radio-frequency module, downlink signal processing module and downlink radio frequency module；
Uplink signal processing module carries out framing, channel coding, modulation and upconversion process to director data and is formed all the way
Uplink transmitting signal and the transmission channel for sending supreme row radio-frequency module；Uplink signal processing module also receives upstream radio-frequency module
If receiving channel send main line downlink signal, it is downconverted, demodulation, channel decoding, frame decoding and image decompressor it is complete
If being shown at main line parallel image；
The transmission channel of upstream radio-frequency module receives the uplink all the way that uplink signal processing module is sent and emits signal, carries out
The receiving channel of downlink radio frequency module is sent to after filtering and amplification；The receiving channel of upstream radio-frequency module receives downlink radio frequency mould
If main line downlink signal that the transmission channel of block is sent simultaneously is sent to uplink signal processing module；
If downlink signal processing module pair main line image data carry out image compression encoding, framing, channel coding, modulation and
If upconversion process forms main line downlink signal and is sent to the transmission channel of downlink radio frequency module；Downlink signal handles mould
Block also receive downlink radio frequency module receiving channel send uplink signal all the way, and carry out down coversion, demodulation, channel decoding,
Frame decoding and protocol analysis handle to obtain director data；
If the transmission channel of downlink radio frequency module receives the main line downlink signal that downlink signal processing module is sent, into
The receiving channel of upstream radio-frequency module is sent to after row filtering and amplification；The receiving channel of downlink radio frequency module receives upstream radio-frequency
The uplink all the way that the transmission channel of module is sent emits signal and is sent to downlink signal processing module.
Preferably, uplink signal processing module and downlink signal processing module are all made of
AD9361+FPGA+DSP framework.
Preferably, if main line downlink signal is the parallel PAL system gray image signals in 4 tunnels.
Preferably, uplink signal processing module carries out input/output signal transmitting-receiving, 2 K7 systems using 4 AD9361 chips
FPGA and 4 DSP of column carries out signal processing operation.
Preferably, downlink signal processing module carries out input/output signal transmitting-receiving, 1 A7 system using 1 AD9361 chip
FPGA and 1 DSP of column carries out signal processing operation.
Preferably, uplink signal processing module and downlink signal processing module use J30-21ZKP, J30-15ZKP, J30-
9ZKP and SMP-JHD connector；Upstream radio-frequency module and downlink radio frequency module use J30-9ZKP and SMA-KFB2 connector.
Preferably, uplink signal processing module and downlink signal processing module and external interface are that asynchronous RS422 is logical all the way
Believe interface.
Compared with prior art, the invention has the following beneficial technical effects:
The present invention comprehensively utilizes the respective advantage of time division multiple acess and frequency division multiple access, and using asymmetric system, i.e. uplink uses
Time division multiple acess system, downlink uses frequency division multiple access system, to realize multichannel director data and image data parallel transmission, into
The complexity for reducing system equipment when row multichannel director data and image data parallel transmission increases systematic collaboration control
The multiplexing of real-time, equipment reduces system cost and power consumption.The present invention can carry out high reliability biography to burst director data
It is defeated, at the same can parallel transmission multiway images data, function admirable stablize.
Detailed description of the invention
Fig. 1 is ground equipment system block diagram；
Fig. 2 is airborne equipment system block diagram；
Fig. 3 is uplink signal processing module hardware design block diagram；
Fig. 4 is downlink signal processing module hardware design block diagram；
Fig. 5 is video acquisition hardware circuit diagram.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
The uplink communication control instruction little using time division multiple access way transmitted data amount；The big figure of downlink transmission data amount
When as data, if also using time division multiple access way, message transmission rate is too high, excessive to the gain requirements of system, increases
The complexity of equipment, cost performance are low.Therefore the respective advantage of time division multiple acess and frequency division multiple access is comprehensively utilized in the present invention, using not
Symmetric system, i.e. uplink use time division multiple acess system, and downlink uses frequency division multiple access system, to realize multichannel director data and figure
As data parallel transmits.
Concrete signal transmission process of the present invention are as follows:
Uplink signal transmissions process specifically: uplink signal processing module carries out framing, channel coding, tune to director data
System and upconversion process form uplink transmitting signal all the way and send the transmission channel of supreme row radio-frequency module；Upstream radio-frequency module
Transmission channel receive the transmitting of uplink all the way that uplink signal processing module is sent and signal and be filtered and amplify, then pass through down
The receiving channel of row radio-frequency module receives and is sent to downlink signal processing module, downlink signal processing module to it is received all the way
Uplink emits signal and carries out down coversion, demodulation, channel decoding, frame decoding and protocol analysis processing acquisition director data；
Downlink signal transmission process specifically: if downlink signal processing module pair main line image data carries out compression of images volume
If code, framing, channel coding, modulation and upconversion process form main line downlink signal and are sent to downlink radio frequency module
Transmission channel；If the transmission channel of downlink radio frequency module receives the main line downlink signal of downlink signal processing module transmission simultaneously
It is filtered and amplifies, the receiving channel then through upstream radio-frequency module receives and sends supreme row signal processing module；Uplink
If signal processing module is downconverted to the main line downlink signal received, demodulation, channel decoding, frame decoding and image decompression
It is shown if main line parallel image is completed in contracting.
In the present embodiment, four road director data of uplink simultaneous transmission, four tunnel image data of downlink parallel transmission.Signal processing
Module, radio-frequency module independent design, two stand-alone antennas are received and dispatched for radiofrequency signal, and communications band, bandwidth are restructural.
The instruction wireless transmission system for images of frequency division multiple access of the present invention and time division multiple acess hybrid scheme includes ground
Equipment and airborne equipment, ground equipment system block diagram is as shown in Figure 1, airborne equipment system block diagram is as shown in Figure 2.Ground installation packet
Uplink signal processing module and upstream radio-frequency module are included, airborne equipment includes downlink signal processing module and downlink radio frequency module.
Uplink signal processing module receives RS422 data and send signal by framing, channel coding, modulation, up-conversion
Toward the transmission channel of uplink radio-frequency module；Uplink signal processing module receives 4 tunnels that the transmission channel of downlink radio frequency module is sent
Downlink signal passes through down coversion, demodulation, channel decoding, frame decoding, image decompressor respectively, completes the parallel PAL system ash in 4 tunnels
Degree image is shown.As shown in figure 3, the hardware circuit of uplink signal processing module include FPGA, AD9361, DSP, clock circuit,
Power circuit, FLASH circuit and RS422 circuit, main devices and function used in each circuit are as shown in table 1.
1 uplink signal processing module hardware circuit of table composition
| Hardware circuit | Main devices | Function |
| FPGA | XC7K325TFFG900 | Protocol analysis, channel coding/decoding and QPSK modulation /demodulation |
| AD9361 | AD9361BBCZ | Modulation /demodulation of the baseband signal to radiofrequency signal |
| DSP | TMS320DM368 | Image decompressor |
| Clock circuit | TDNCAN-40.00MHz | Generate 40Mhz clock |
| Power circuit | LTM4608AIV#PBF | Generate modules power supply |
| FLASH circuit | N25Q128A13ESE40E | Store FPGA, DSP parameter |
| RS422 | ADM3490ARZ | RS422 level and LVCOMS33 level conversion |
The transmission channel of upstream radio-frequency module receives the 1 road row transmitting signal that uplink signal processing module is sent and completes
Uplink emits the filtering and amplification of signal, then the receiving channel through downlink radio frequency module is sent to downlink signal processing module；On
The receiving channel of row radio-frequency module receives the 4 tunnel downlink signals that downlink radio frequency transmitting module is sent.Upstream radio-frequency module
Hardware circuit includes filter circuit and power amplifier；Filter circuit is filtered signal, inhibits out of band signal；Power amplifier pair
Signal after filtering amplifies, and main devices used in each circuit and function are as shown in table 2.
2 upstream radio-frequency module hardware circuit of table composition
| Hardware circuit | Main devices | Function |
| Receive power amplifier | SBB-5089Z | Signal gain 45dB |
| Receive preselection filter 1 | MB3818-100K8HA | The broadband filter of centre frequency 3818Mhz |
| Receive preselection filter 2 | MB3908-100K8HA | The broadband filter of centre frequency 3908Mhz |
| Receive preselection filter 3 | MB3998-100K8HA | The broadband filter of centre frequency 3998Mhz |
| Receive preselection filter 4 | MB4088-100K8HA | The broadband filter of centre frequency 4088Mhz |
| Send power amplifier | TGA2975-SM | Maximum transmission power 30dBm |
| Transmitting filter | MB3766-300K8HA | The broadband filter of centre frequency 3766Mhz |
Downlink signal processing module passes through image compression encoding, framing, channel coding, modulation and up-conversion, by 4 tunnel downlinks
Transmitting signal is sent to the transmission channel of downlink radio frequency module；The reception that downlink signal processing module also receives downlink radio frequency module is logical
The 1 road row transmitting signal that road is sent, obtains instruction number by down coversion, demodulation, channel decoding, frame decoding and protocol analysis processing
According to.As shown in figure 4, its hardware circuit includes FPGA, AD9361, DSP, clock circuit, power circuit, FLASH circuit and RS422
Circuit, main devices and function used in each circuit are as shown in table 3.
3 downlink signal processing module hardware circuit of table composition
The transmission channel of downlink radio frequency module receives the 4 tunnel downlink signals that downlink signal processing module is sent, and carries out
After filtering and amplification, the receiving channel through upstream radio-frequency module is sent to uplink signal processing module；Downlink radio frequency module connects
Receive the 1 road row transmitting signal that the transmission channel of channel reception upstream radio-frequency module is sent.Downlink radio frequency module hardware has filtering
Circuit and power amplifier, filter circuit are filtered downlink signal processing module input signal, inhibit bandwidth external signal；Power amplifier
Circuit amplifies the signal after filtering, improves transmission power.Downlink radio frequency module hardware by reception preselection filter and
Power amplifier forms, and main devices used in each circuit and function are as shown in table 4.
4 downlink radio frequency module hardware circuit of table composition
| Hardware circuit | Main devices | Function |
| Power amplifier | TGA2975-SM | Maximum transmission power 30dBm |
| Receive preselection filter | MB3766-300K8HA | The broadband filter of centre frequency 3766Mhz |
Fig. 5 is hardware circuit diagram of the present invention.
Communication experiment, ground installation and airborne equipment are attached product using radio frequency line in a static environment, Ke Yitong
Tetra- airborne equipment image transmittings of Shi Shixian specifically can carry out point spread according to user demand.
The design requirement for specifying wireless communication transmissions system herein is designed and produced as wireless communication transmissions system
Foundation.
Claims (10)
1. the instruction image radio transmitting method of frequency division multiple access and time division multiple acess hybrid scheme, which is characterized in that when uplink uses
Divide multiple access regime transmissions director data, downlink uses frequency division multiple access regime transmissions image data.
2. the instruction image radio transmitting method of frequency division multiple access according to claim 1 and time division multiple acess hybrid scheme,
It is characterized in that, uplink director data all the way, four tunnel image data of downlink parallel transmission.
3. the instruction image radio transmitting method of frequency division multiple access according to claim 1 and time division multiple acess hybrid scheme,
Be characterized in that, uplink signal transmissions process specifically: uplink signal processing module to director data carry out framing, channel coding,
Modulation and upconversion process form uplink transmitting signal all the way and send the transmission channel of supreme row radio-frequency module；Upstream radio-frequency mould
The transmission channel of block receives the transmitting signal of uplink all the way that uplink signal processing module is sent and is filtered and amplifies, and then passes through
The receiving channel of downlink radio frequency module receives and is sent to downlink signal processing module, and downlink signal processing module is to received one
Road row transmitting signal carries out down coversion, demodulation, channel decoding, frame decoding and protocol analysis processing and obtains director data；
Downlink signal transmission process specifically: if downlink signal processing module pair main line image data progress image compression encoding,
If framing, channel coding, modulation and upconversion process form main line downlink signal and are sent to the hair of downlink radio frequency module
Penetrate channel；If the transmission channel of downlink radio frequency module receives the main line downlink signal that downlink signal processing module is sent and goes forward side by side
Row filtering and amplification, the receiving channel then through upstream radio-frequency module receive and send supreme row signal processing module；Uplink letter
If number processing module is downconverted to the main line downlink signal received, demodulation, channel decoding, frame decoding and image decompressor
If completing main line parallel image to show.
4. the instruction wireless transmission system for images of frequency division multiple access and time division multiple acess hybrid scheme, which is characterized in that believe including uplink
Number processing module, upstream radio-frequency module, downlink signal processing module and downlink radio frequency module；
Uplink signal processing module carries out framing, channel coding, modulation and upconversion process to director data and forms uplink all the way
Transmitting signal and the transmission channel for sending supreme row radio-frequency module；Uplink signal processing module also receives connecing for upstream radio-frequency module
If receiving the main line downlink signal that channel is sent, if downconverted, demodulation, channel decoding, frame decoding and image decompressor are completed
Main line parallel image is shown；
The transmission channel of upstream radio-frequency module receives the uplink all the way that uplink signal processing module is sent and emits signal, is filtered
With the receiving channel for being sent to downlink radio frequency module after amplification；The receiving channel of upstream radio-frequency module receives downlink radio frequency module
If the main line downlink signal of transmission channel transmission is simultaneously sent to uplink signal processing module；
If downlink signal processing module pair main line image data carries out image compression encoding, framing, channel coding, modulation and upper change
If frequency processing formation main line downlink signal and the transmission channel for being sent to downlink radio frequency module；Downlink signal processing module is also
The uplink signal all the way that the receiving channel of downlink radio frequency module is sent is received, and carries out down coversion, demodulation, channel decoding, frame decoding
It handles to obtain director data with protocol analysis；
If the transmission channel of downlink radio frequency module receives the main line downlink signal that downlink signal processing module is sent, filtered
The receiving channel of upstream radio-frequency module is sent to after wave and amplification；The receiving channel of downlink radio frequency module receives upstream radio-frequency module
The transmitting of uplink all the way that sends of transmission channel signal and be sent to downlink signal processing module.
5. the instruction wireless transmission system for images of frequency division multiple access according to claim 4 and time division multiple acess hybrid scheme,
It is characterized in that, uplink signal processing module and downlink signal processing module are all made of AD9361+FPGA+DSP framework.
6. the instruction wireless transmission system for images of frequency division multiple access according to claim 4 and time division multiple acess hybrid scheme,
It is characterized in that, if main line downlink signal is the parallel PAL system gray image signals in 4 tunnels.
7. the instruction wireless transmission system for images of frequency division multiple access according to claim 4 and time division multiple acess hybrid scheme,
It is characterized in that, uplink signal processing module carries out input/output signal transmitting-receivings using 4 AD9361 chips, 2 K7 series
FPGA and 4 DSP carries out signal processing operation.
8. the instruction wireless transmission system for images of frequency division multiple access according to claim 4 and time division multiple acess hybrid scheme,
It is characterized in that, downlink signal processing module carries out input/output signal transmitting-receiving using 1 AD9361 chip, 1 A7 series
FPGA and 1 DSP carries out signal processing operation.
9. the instruction wireless transmission system for images of frequency division multiple access according to claim 4 and time division multiple acess hybrid scheme,
Be characterized in that, uplink signal processing module and downlink signal processing module using J30-21ZKP, J30-15ZKP, J30-9ZKP and
SMP-JHD connector；Upstream radio-frequency module and downlink radio frequency module use J30-9ZKP and SMA-KFB2 connector.
10. the instruction wireless transmission system for images of frequency division multiple access according to claim 4 and time division multiple acess hybrid scheme,
It is characterized in that, uplink signal processing module and downlink signal processing module and external interface are asynchronous RS422 communication interfaces all the way.
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