Views: 52 Author: Site Editor Publish Time: 2019-09-15 Origin: Site
It has long been a secret of how NLOS Robot video transmitter brings its work to the stage. However, if you are an ordinary drone enthusiast, that question must be answered by a professional NLOS Robot video transmitter supplier like us. Well, if you're wondering how NLOS Robot video transmitter works, why not have a look at this introduction?
Here is the content list:
1. What Are Key Components of NLOS Robot Video Transmission?
2. How to Measure NLOS Robot Video Transmitter Robustness?
3. How Does NLOS Robot Video Transmitter Work?
The key components of NLOS robot video transmitter are light source, photodetector, and optical antenna, which play a decisive role in drone video transmission system performance and working characteristics.
UV gas lamp, UV laser and UV-LED are the three main types of light sources used in drone video transmission system. UV gas lamp has high power and low cost, and being taken into use of a wide range of UV light sources. However, it is fragile, short life, and driven by high voltage. It is difficult to modulate the high-speed COFDM UAV video and data links switch directly. Usually, it is suitable for some low-speed, high-power and long-range wireless video transmitter.
Optical detector is the core device of wireless video transmitter solutions, which is mainly used to convert optical signal into electrical signal. Because of the strong scattering and absorption of light signal by atmosphere, the light signal arriving at the receiving end of wireless video transmitter solutions is very weak, so the photodetector of NLOS Robot video transmitter should have high transmittance, high sensitivity, large detection area, high gain and bandwidth, and very low dark current.
In wireless video transmission, optical antenna plays two main roles:
(1) Expanding the laser beam at the wireless video transmitter, increasing its waist radius, so as to effectively compress the divergence angle of the laser beam, reduce the divergence loss of the laser beam, and reduce the drone video transmission system's requirements for the power of the light source.
(2) Increase the receiving area, compress the receiving field and reduce the background light interference at the drone video transmission system, so as to improve the signal-to-noise ratio of the optical receiver and extend the connection distance of the drone video transmission system.
The COFDM UAV video and data links performs ranging, and the performance of the COFDM UAV video and data links directly affects the performance of the drone.
COFDM UAV video and data links can take utilization of the entire bandwidth and split it into smaller subchannels. The sender and receiver work on each frequency channel for a period of time and then move to another end.
The store-and-forward technology requires the switch to decide how to forward after receiving all wireless video transmitter solutions. It also supports the conversion between ports at different speeds, which facilitates the protocol work between the high-speed port and the low-speed port, and has good reliability.
For a COFDM UAV video and data links in two network nodes, link encryption can provide security for data transmitted over the network. For COFDM UAV video and data links encryption, all messages are encrypted before being transmitted, the received message is decrypted at each node, and then the message is encrypted using the key of the next link before being transmitted. A message may have to travel over many COFDM UAV video and data links before it reaches its destination.
The typical coverage of NLOS Robot video transmitter is up to 2km, and whether the NLOS transmission technology is adopted, the coverage effect is very different. In the NLOS environment, the cell radius of the full-performance base station system is more than four times larger than that of the standard base station system. Obviously, for a community with a complex terrain and low user density, the cost of NLOS Robot video transmitter can be effectively reduced.
The adaptive EC and dynamic rate FEC technology can ensure the reliable connection of the COFDM UAV video and data links, and can ensure the high throughput of the system when the link quality is good, so that the wireless resources can be flexibly utilized and flexibly users provide high-speed services.
The LOS transmission characteristics of high-band radio waves limit its application in terrestrial UAV communication solutions, and NLOS-related technologies can ensure that broadband wireless access UAV communication solutions operating in this band operate reliably in NLOS applications, while wider availability is available. The advantages of the channel and the high spectrum utilization of the technology itself can fully satisfy the wide coverage and large-capacity application requirements of the NLOS Robot video transmitter.
That's how NLOS Robot video transmitter brings that its functions to the application. While the operation of NLOS Robot video transmitter is not very complex for the customer, the technology behind implementing them is quite technical, so we do not recommend that you fix NLOS Robot video transmitter when it fails. You may as well give your problems to us; we will serve you wholeheartedly.