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Views: 24 Author: Site Editor Publish Time: 2019-06-16 Origin: Site
Unmanned aerial vehicles have broken through the history of manned flight and become one of the most famous inventions of the 21st century. We want to do UAV ultra-long-distance image transmission, which relies on the constant innovation of UAV video transmitter technology. How to balance the distance and power consumption of image transmission with UAV? What are the technical difficulties? If you are not a manufacturer of wireless transmitter , you may feel that answers to these questions are not easy to come by.
Here is the content list:
1. How to Realize Wireless Transmission of UAV Video Transmitter?
2. What Are Long-distance Transmission Requirements?
3. How to Achieve Balance Between Range and Power Consumption?
With limited capacity of UAV video transmitter system, both the sending and receiving end of images are in the air platform in the actual use environment.
Due to the high requirements of real-time image transmission and receiving and the limited use volume, the selected image compression and decompression algorithm of wireless video transmitter must be efficient and easy to implement, with the feature of low latency.
1. Algorithm
High fidelity image display is needed because the receiver needs to distinguish the image to make the correct choice, so the image compression algorithm of UAV video transmitter must choose high fidelity compression algorithm.
2. Anti-interference
Interference channel environment is a complex electromagnetic environment in wartime, and there are various kinds of noise, burst interference and random interference in the channel of UAV video transmitter.
3. Power
When it comes to modern means of communication, we have to talk about electromagnetic frequency. Generally speaking, the lower the frequency of electromagnetic wave UAV video transmitter has, the farther it travels. However, some communication methods that need to be relaying use short wave, which is lower than ultra-short wave in frequency and can travel farther, hundreds of kilometers or even thousands of kilometers. For example, the radio station of VOA uses short wave frequency.
Long distance transmission is definitely the narrower the amount of drone video transmitter data, the farther the transmission, the greater the transmission power, the higher the sensitivity, which involves the problem of power.
Compared with the average signal transmission, UAV video transmitters transmission characteristic is distinctive. The characteristics of drone video transmitters is the large amount of data, lower latency requirements, and these are the hardest places to control wireless transmission.
As mentioned above, the transmission of UAV video transmitter is characterized by high image quality requirements and low delay of real-time image monitoring. Besides these two points, there are still some problems:
Since UAVs are portable equipment, the power of wireless video transmitter is not very large. Therefore, the transmission power has to be small, which is not consistent with the distance. Transmission far first to pass the power consumption of this level.
In addition, drone transmitter must have strong anti-interference ability, because UAV often have to work in a crowded or complicated environment with electromagnetic interference, which inevitably brings the transmission with external influence, which is also a problem.
There are also standards that bring with UAV video transmitter certain limitations, both with respect to both video and unmanned aerial vehicles. In addition to these requirements, there are battery development limitations and other issues about UAV video transmitter.
To sum up, requirements for long-distance transmission of UAV video transmitter can be summarized as follows: high quality, low power, strong anti-interference ability, long transmission distance, meeting limitations of national laws and regulations, and suiting development of battery technology.
The most important point of UAV video transmitter long-distance transmission is the balance of distance and power consumption.
According to Shannon’s formula, if we want a long range, then the bandwidth of UAV video transmitter gets narrower. The reason why so many flight equipment is using some sort of obsolete modulation technology, such as aircraft amplitude modulation, is that the relationship between UAV video transmitter transmission distance and power consumption needs to be balanced.
If the signal needs to be transmitted far, then the power should be large, but the policy stipulates that the power consumption should not be large, the only thing that can be improved is the channel source-related technology, which is the most important technology of wireless communication.
In the same case of UAV video transmitter power consumption, other parts to reduce, battery optimization, bandwidth compression, do not put the image completely without distortion to transmission, to ensure the relative balance between distance and power consumption. Of course, this is based on the level of research and development of UAV communication solutions. To improve the distance, it is necessary to optimize the wireless transmission technology, which technology is currently used in the UAV video transmitter transmission technology? ——COFDM technology. Our wireless video transmission system offers a video, Ethernet signal and bi-directional data Link specifically designed for commercial UAVs and industrial drones for 7-8km wireless transmitting.
Generally speaking, the long-distance transmission of UAV video transmitter is actually the balance between distance and power consumption, which also involves many modulation technologies, such as using spread spectrum to improve anti-interference ability and optimization of channel source technology. If you want to find a balance between the two, then our UAV video transmitter will undoubtedly give you the best experience, you will never regretworking with us.
