CN203951493U - A kind of unmanned plane wireless image transmission system based on 340MHz multi-carrier modulation technology - Google Patents
A kind of unmanned plane wireless image transmission system based on 340MHz multi-carrier modulation technology Download PDFInfo
- Publication number
- CN203951493U CN203951493U CN201420032657.1U CN201420032657U CN203951493U CN 203951493 U CN203951493 U CN 203951493U CN 201420032657 U CN201420032657 U CN 201420032657U CN 203951493 U CN203951493 U CN 203951493U
- Authority
- CN
- China
- Prior art keywords
- module
- video
- unmanned plane
- transmission system
- image transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a kind of unmanned plane wireless image transmission system based on 340MHz multi-carrier modulation technology, comprise audio frequency and video A/D modular converter, AES encrypting module, MPEG2 coding module, COFDM modulation module and memory module, AV vision signal is digital signal by described audio frequency and video A/D module converts in real time, be encrypted, compress after processing through AES encrypting module, MPEG2 coding module, be modulated into radiofrequency signal by COFDM modulation module, and send through antenna.The utility model adopts multi-carrier modulation technology, has overcome multipath and has disturbed and reduced the error rate, has the features such as long transmission distance, diffracting power are strong, is particularly useful for City Building and stops non line of sight transmission in environment and high-speed mobile.
Description
Technical field
The utility model relates to wireless communication field, is specifically related to the unmanned plane wireless image transmission system based on 340MHz multi-carrier modulation technology.
Background technology
At present, the technical system that wireless image transmission adopts can roughly be divided into: GPRS/CDMA/3G(mobile communication), LMDS(spread spectrum microwave), WLAN(WLAN (wireless local area network)), DBS(satellite), COFDM(OFDM) etc., various technology all have intrinsic advantage and defect.GPRS/CDMA/3G(mobile communication) have that networking cost is low, resource utilization advantages of higher, but transmission rate is generally in 100Kbps level, is difficult to the image of high quality; LMDS(spread spectrum microwave) bandwidth more than 1GHz can be provided, under intervisibility environment, can realize bidirectional high speed transmission of video, but can not stop in environment and mobile in use; WLAN(WLAN (wireless local area network)) networking flexibility, dilatation is convenient, adopted OFDM multi-carrier modulation, but number of carriers is few, frequency range is high in physical layer, stop with mobile environment under result of use all undesirable; DBS(satellite) bandwidth, capacity is large, communication distance is far away, area coverage is limited by geographical conditions greatly and not, but due to the shortage of satellite channel cause rent expensive.
Above-mentioned Radio Transmission Technology is not all suitable for unmanned plane and uses; unmanned plane schemes to pass the microwave transmissions that adopt in real time at present; conventionally select tri-kinds of frequency ranges of 1.2GHz, 2.4GHz or 5.8GHz; but still exist transmission range far away not, be subject to above ground structure and disturb, lack the shortcomings such as necessary encipherment protection; be difficult to meet the remote high definition real-time Transmission of the industry audio frequency and video such as public security, People's Armed Police, fire-fighting, electric power, broadcasting and TV, particularly in mobile way or stop the requirement of carrying out communication under environment with two-forty.
Summary of the invention
The purpose of this utility model is to be to provide a kind of unmanned plane wireless image transmission system based on 340MHz multi-carrier modulation technology, third generation communication technology COFDM(multi-carrier modulation technology), the wireless audio/video transmitting device of unmanned plane of MPEG2 video coding technique and AES encryption technology, this device can transmit real-time high definition audio frequency and video in high-speed mobile He under the circumstance of occlusion of city, possess audio frequency and video relay transmission ability, dispose on-the-spot aerial monitoring is provided for emergency command and accident., high quality graphic transmission remote " in high-speed motion ", " non-looking under poker part " that this system can realize possesses the ability that aerial relay communication is provided for ground installation simultaneously.
For achieving the above object, the utility model discloses a kind of unmanned plane wireless image transmission system based on 340MHz multi-carrier modulation technology, it is characterized in that: comprise audio frequency and video A/D modular converter, AES encrypting module, MPEG2 coding module, COFDM modulation module and memory module, AV vision signal is digital signal by described audio frequency and video A/D module converts in real time, be encrypted, compress after processing through AES encrypting module, MPEG2 coding module, be modulated into radiofrequency signal by COFDM modulation module, and send through antenna.
The above-mentioned audio frequency and video A/D modular converter of unmanned plane wireless image transmission system connects outside audio-video acquisition equipment, inputs on-the-spot audio/video information by audio-video acquisition equipment.
Unmanned plane wireless image transmission system also comprises a receiving terminal with D/A modular converter and AES deciphering module, and this receiving terminal will be reduced into loss-free high definition sound and video image after the data deciphering after the encoding compression processing receiving.
Unmanned plane wireless image transmission system also comprises a remote control module, this module has hopping, determine available channel by detecting periphery electromagnetic environment, selected channel generates by respective algorithms at random according to transmitter ID, every frame data of transmitting all comprise overall unique ID, have improved the antijamming capability in complex electromagnetic environment.
Described audio/video decoding module is audio decoder module H.264.
Described remote control module takes 2.4GHz frequency to receive and send messages, avoid and the figure number of delivering a letter between co-channel interference.
The each subcarrier of COFDM technology adopting can be selected the High Speed Modulation such as QPSK, 16QAM, 64QAM, channel speed after synthetic is generally all greater than 4Mbps, the high-quality encoding and decoding such as 4:2:0,4:2:2 in can transmitting MPEG 2, receiving terminal image resolution ratio can reach 576 × 720 or 480 × 720 or 1920 × 1080, can fully meet the requirements such as post analysis, storage, editor.
Adopt 128 AES digital-scrambling techniques, the encryption of WiMAX multicarrier, signal scrambling technique, realize complete digital signal processing, ensured confidentiality, stability and the reliability of whole system, make aerial transmission information obtain safety guarantee.
Taking the optimum balance between the availability of frequency spectrum and the error rate as principle, power control and Adaptive Modulation phase co-ordination mode are adopted, select different modulation systems according to the quality of channel condition, when channel is good, can enhanced modulation mode (as 64QAM), or when low modulation mode (as QPSK), reduce transmitting power.
The beneficial effects of the utility model are: the utility model is combined 340MHz multi-carrier modulation technology with many rotor wing unmanned aerial vehicles flying platform, avoid on the one hand traditional 1.2GHz, 2.4GHz, 5.8GHz microwave mode graphoid to pass and be subject to the drawback that electromagnetic environment affects, diffracting power is poor, transmission range is short, confidentiality is not enough, utilize on the other hand self flying height advantage to avoid substantially complex-terrain to the stopping of video transfer signal, give full play to the performance of COFMD image transmission system.Simultaneously, the utility model also possesses air communication relay capabilities, can forward the audio-video signal of ground Image transmission equipment, after video conversion, utilize equipment of itself to send, expand the transmission of video distance of the graphic transmission equipment that is subject to the influence of topography or transmittability deficiency, for video directing system provides steady and audible audio frequency and video at complex condition.
Brief description of the drawings
Fig. 1 is the structured flowchart of the unmanned plane wireless image transmission system transmitting terminal of the utility model based on 340MHz multi-carrier modulation technology.
Fig. 2 is the structured flowchart of the unmanned plane wireless image transmission system receiving terminal of the utility model based on 340MHz multi-carrier modulation technology.
Embodiment
The utility model is combined 340MHz multi-carrier modulation technology with many rotor wing unmanned aerial vehicles flying platform, not only improve the ability of unmanned plane self transmission of video, but also possesses relay communication ability, can forward the audio-video signal of ground Image transmission equipment, after video conversion, utilize equipment of itself to send, expand the transmission of video distance of the graphic transmission equipment that is subject to the influence of topography or transmittability deficiency, for video directing system provides steady and audible audio frequency and video at complex condition.
Below in conjunction with brief description of the drawings and embodiment, the utility model is further illustrated.
As shown in Figure 1, described unmanned plane wireless image transmission system transmitting terminal is by video acquisition camera head, from steady The Cloud Terrace, video storage module, flies to control navigation module, gps satellite locating module, OSD video superimpose module, 340MHzCOFDM figure passes transmitter module, 5.8GHz microwave figure transmitting/receiving module, video output module, video frequency switching module, aerial omnidirectional circular polarization aerial, 2.4GHz or 900MHz data radio station and remote control signal receiving module, power management module composition.Described COFDM figure passes transmitter module and is integrated with A/D modular converter, AES encrypting module, MPEG2 coding module, radiating module.
Airborne high definition Flying Camera function is carried out that recording with real-time AV of HD video carried out in ground simultaneously and is exported OSD video superimpose module to, can control the sensing of airborne high definition motion cameras and press down the vibrations from fuselage from steady The Cloud Terrace, keeping video steady and audible.
OSD video superimpose module can read from every state of flight of flight control system and GPS locating information, and the video image that logical these data video camera is transmitted exports video frequency switching module to after superposeing.
Meanwhile, airborne 5.8GHz microwave imagery receiver module can be accepted the video signal from ground installation, exports video frequency switching module to equally by real-time AV.Airborne DVR video record module also can record the video information from 5.8GHz image transmission module simultaneously.
The effect of video frequency switching module is optionally to pass the vision signal of transmitter module transmission from airborne high definition Flying Camera head or 5.8GHz microwave imagery receiver module to 340MHzCOFDM figure according to the actual needs.
Wherein said 340MHzCOFDM figure passes transmitter module the video information receiving is carried out to the processing of MPEG2/MPEG4 coding; make it to produce the TS audio/video flow of high definition; this TS stream carries out RS coding through scrambler and outputs to external interleaver; after processing, convolutional encoding is input to interleaver; shine upon afterwards and form frame data; now pilot tone and TPS signal are mixed with described frame data; insert to protection interval through IFFT, then carry out after D/A conversion and quadrature modulation and radio frequency amplification are processed sending by antenna.This stage also can be carried out AES128 bit encryption processing to data.
As shown in Figure 2, terrestrial wireless image transmission system receiving terminal passes reception antenna by: 340MHz figure, dull and stereotyped tracking antenna, from motion tracking The Cloud Terrace, COFDM figure transmitting/receiving module, video-frequency monitor, video storage and management of video module, ground control station, 2.4GHz or 900MHz data radio station and remote signal transmitter module composition.Described COFDM figure transmitting/receiving module comprises DA modular converter, deciphering module, decoder module, video output module.
Described video reception module is corresponding with video transmission module in Fig. 1, and first video reception module arrives vision signal by antenna reception.Antenna can switch between common vertical polarized antenna and dull and stereotyped tracking antenna, can read the be added to positional information of unmanned plane in video of OSD video superimpose module from motion tracking The Cloud Terrace, thereby automatically adjust the sensing of plate aerial just to unmanned plane, thereby keep the stable of wireless signal.
The vision signal receiving is amplified by tuner and amplifier, change laggard row frequency offset correction through A/D again and be input to FFT unit, now the signal behind FFT unit carries out phasing, carry out again TPS coding simultaneously, by frame pulse and configuration information output, this video information is carried out synchronously simultaneously, the information exchange after synchronous is crossed to A/D converter and re-send to tuner.
Video information after phase place is corrected carries out quantizing after channel estimating, in separating afterwards, interweave, CITERBI coding, RS be synchronized to and separate outer interweaving, then encode and carry out come in and go out TS stream of descrambling code after processing by RS, these TS streams enter video information after MPEG2/MPEG4 decodes.Video information can further be linked into each terminal of video directing system.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should look, for belonging to protection range of the present utility model.
Claims (4)
1. the unmanned plane wireless image transmission system based on 340M multi-carrier modulation technology, it is characterized in that: comprise audio frequency and video A/D modular converter, AES encrypting module, MPEG2 coding module, COFDM modulation module and memory module, AV vision signal is digital signal by described audio frequency and video A/D module converts in real time, be encrypted, compress after processing through AES encrypting module, MPEG2 coding module, be modulated into radiofrequency signal by COFDM modulation module, and send through antenna.
2. unmanned plane wireless image transmission system according to claim 1, is characterized in that, described audio frequency and video A/D modular converter connects outside audio-video acquisition equipment, inputs on-the-spot audio/video information by audio-video acquisition equipment.
3. unmanned plane wireless image transmission system according to claim 1, it is characterized in that, also comprise a receiving terminal with D/A modular converter and AES deciphering module, this receiving terminal will be reduced into loss-free high definition sound and video image after the data deciphering after the encoding compression processing receiving.
4. unmanned plane wireless image transmission system according to claim 1, it is characterized in that, also comprise a remote control module, this module has hopping, determine available channel by detecting periphery electromagnetic environment, selected channel generates by respective algorithms at random according to transmitter ID, and every frame data of transmitting all comprise overall unique ID.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420032657.1U CN203951493U (en) | 2014-01-20 | 2014-01-20 | A kind of unmanned plane wireless image transmission system based on 340MHz multi-carrier modulation technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420032657.1U CN203951493U (en) | 2014-01-20 | 2014-01-20 | A kind of unmanned plane wireless image transmission system based on 340MHz multi-carrier modulation technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203951493U true CN203951493U (en) | 2014-11-19 |
Family
ID=51893507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420032657.1U Expired - Fee Related CN203951493U (en) | 2014-01-20 | 2014-01-20 | A kind of unmanned plane wireless image transmission system based on 340MHz multi-carrier modulation technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203951493U (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104507084A (en) * | 2015-01-05 | 2015-04-08 | 成都奥瑞信科技有限公司 | Co-frequency encryption digitalized communication transmission control system for multiple sets of airborne equipment of unmanned plane |
| CN105472411A (en) * | 2015-12-08 | 2016-04-06 | 上海倍安实业有限公司 | Firefighting image processing system and firefighting image processing method based on same |
| CN105721839A (en) * | 2016-04-27 | 2016-06-29 | 王正作 | Efficient unmanned aerial vehicle video transmission method |
| CN105763651A (en) * | 2016-04-29 | 2016-07-13 | 广东能飞航空科技发展有限公司 | Automatic tracking remote image transmission system |
| CN105759837A (en) * | 2016-04-29 | 2016-07-13 | 广东能飞航空科技发展有限公司 | Power transmission line multi-rotor airship inspection system |
| CN105827366A (en) * | 2016-04-26 | 2016-08-03 | 广东容祺智能科技有限公司 | Unmanned aerial vehicle anti-interference self-correcting system |
| CN105898224A (en) * | 2016-04-26 | 2016-08-24 | 广东容祺智能科技有限公司 | UAV data transmission security system and transmission method thereof |
| CN106303452A (en) * | 2016-08-30 | 2017-01-04 | 天津汉光祥云信息科技有限公司 | The method that monitor video multichannel strange land uses is solved based on encrypted wireless transmission mode |
| CN106444555A (en) * | 2016-11-30 | 2017-02-22 | 厦门汉航精密科技有限公司 | Ground forwarding-based unmanned aerial vehicle medium-short distance remote control and remote measuring system |
| CN106933133A (en) * | 2015-12-30 | 2017-07-07 | 比亚迪股份有限公司 | Unmanned plane, unmanned aerial vehicle (UAV) control terminal and unmanned aerial vehicle (UAV) control method and system |
| CN107331213A (en) * | 2017-05-27 | 2017-11-07 | 空网科技（北京）有限公司 | A kind of unmanned plane monitoring and managing method, system |
| CN107342961A (en) * | 2017-05-27 | 2017-11-10 | 国网浙江余姚市供电公司 | A kind of method of the unmanned plane image transmitting asthenia based on CP ML algorithms |
| CN107888865A (en) * | 2017-11-28 | 2018-04-06 | 福建星海通信科技有限公司 | A kind of communication means of audio frequency and video, system and device |
| CN108809352A (en) * | 2018-07-18 | 2018-11-13 | 杭州新融方科技有限公司 | A kind of mobile terminal calling control device and its operating method |
| CN108983809A (en) * | 2018-07-16 | 2018-12-11 | 福州日兆信息科技有限公司 | The method and unmanned plane of accurate identification positioning surrounding based on unmanned plane |
-
2014
- 2014-01-20 CN CN201420032657.1U patent/CN203951493U/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104507084A (en) * | 2015-01-05 | 2015-04-08 | 成都奥瑞信科技有限公司 | Co-frequency encryption digitalized communication transmission control system for multiple sets of airborne equipment of unmanned plane |
| CN104507084B (en) * | 2015-01-05 | 2018-02-13 | 成都奥瑞信科技有限公司 | For the more airborne equipments of unmanned plane with frequency encryption digital communication transmission control system |
| CN105472411A (en) * | 2015-12-08 | 2016-04-06 | 上海倍安实业有限公司 | Firefighting image processing system and firefighting image processing method based on same |
| CN106933133A (en) * | 2015-12-30 | 2017-07-07 | 比亚迪股份有限公司 | Unmanned plane, unmanned aerial vehicle (UAV) control terminal and unmanned aerial vehicle (UAV) control method and system |
| CN105827366B (en) * | 2016-04-26 | 2018-12-25 | 广东容祺智能科技有限公司 | A kind of anti-interference self-picketing positive system of unmanned plane |
| CN105827366A (en) * | 2016-04-26 | 2016-08-03 | 广东容祺智能科技有限公司 | Unmanned aerial vehicle anti-interference self-correcting system |
| CN105898224A (en) * | 2016-04-26 | 2016-08-24 | 广东容祺智能科技有限公司 | UAV data transmission security system and transmission method thereof |
| CN105721839A (en) * | 2016-04-27 | 2016-06-29 | 王正作 | Efficient unmanned aerial vehicle video transmission method |
| CN105759837A (en) * | 2016-04-29 | 2016-07-13 | 广东能飞航空科技发展有限公司 | Power transmission line multi-rotor airship inspection system |
| CN105763651A (en) * | 2016-04-29 | 2016-07-13 | 广东能飞航空科技发展有限公司 | Automatic tracking remote image transmission system |
| CN106303452A (en) * | 2016-08-30 | 2017-01-04 | 天津汉光祥云信息科技有限公司 | The method that monitor video multichannel strange land uses is solved based on encrypted wireless transmission mode |
| CN106444555A (en) * | 2016-11-30 | 2017-02-22 | 厦门汉航精密科技有限公司 | Ground forwarding-based unmanned aerial vehicle medium-short distance remote control and remote measuring system |
| CN107331213A (en) * | 2017-05-27 | 2017-11-07 | 空网科技（北京）有限公司 | A kind of unmanned plane monitoring and managing method, system |
| CN107342961A (en) * | 2017-05-27 | 2017-11-10 | 国网浙江余姚市供电公司 | A kind of method of the unmanned plane image transmitting asthenia based on CP ML algorithms |
| CN107331213B (en) * | 2017-05-27 | 2021-07-13 | 北京星际联航科技有限公司 | Unmanned aerial vehicle supervision method and system |
| CN107888865A (en) * | 2017-11-28 | 2018-04-06 | 福建星海通信科技有限公司 | A kind of communication means of audio frequency and video, system and device |
| CN108983809A (en) * | 2018-07-16 | 2018-12-11 | 福州日兆信息科技有限公司 | The method and unmanned plane of accurate identification positioning surrounding based on unmanned plane |
| CN108809352A (en) * | 2018-07-18 | 2018-11-13 | 杭州新融方科技有限公司 | A kind of mobile terminal calling control device and its operating method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203951493U (en) | A kind of unmanned plane wireless image transmission system based on 340MHz multi-carrier modulation technology | |
| CN108322696A (en) | A kind of unmanned plane wireless image transmission system based on 340MHz multi-carrier modulation technologies | |
| US7783316B1 (en) | Public safety communications network using asymmetric receive/transmit channels | |
| US11019600B2 (en) | Method and system for datacasting and content management | |
| US20090273671A1 (en) | Method and apparatus for encapsulating digital aerial surveillance video on analog video signal | |
| CN202364317U (en) | Power emergency command communication system | |
| CN100469136C (en) | Machine-carried wireless broadband image transmission system | |
| CN104333737A (en) | Near-distance 2-5 M bandwidth simulative wireless picture transmission system and signal processing method | |
| CN110418167A (en) | A kind of broadcast TV program Transmission system based on 5G | |
| CN101882935A (en) | Dual-mode transmitter | |
| US20150181259A1 (en) | Digital television network structure and user terminal | |
| CN201435791Y (en) | Bidirectional digital audio wireless mobile video transmission device | |
| KR20130077605A (en) | Atsc-m/h broadcasting service system | |
| Lee et al. | ATSC 3.0 and LTE cooperation for LDM and SHVC based mobile broadcasting | |
| CN201435790Y (en) | Wireless multi-carrier vehicle bidirectional audio-video and data transmission device | |
| CN201533412U (en) | Dual-mode transmitter | |
| Lee et al. | Field Testing of LDM and SHVC Broadcast in ATSC 3.0 | |
| JP2010118903A (en) | Broadcast system | |
| Pan et al. | The transmission test and demonstration for 8K ultra-high definition TV services using DTMB-A | |
| CN205610847U (en) | Wireless video receiving system | |
| Shurdi et al. | Towards Broadcasting Linear Content over 5G Network | |
| US20230136388A1 (en) | Information processing apparatus and information processing method | |
| Liu et al. | Bidirectional broadcasting in next generation broadcasting-wireless (NGB-W) network | |
| CN202713457U (en) | Wireless high/standard definition relay system | |
| Reimers | Dtt quo vadis |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141119 Termination date: 20150120 |
|
| EXPY | Termination of patent right or utility model |