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Differences Between LOS and NLOS Robot Video Transmitter

Views: 138     Author: Site Editor     Publish Time: 2019-07-05      Origin: Site


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As one of our best-selling products, NLOS robot video transmitter has advantages that cannot be replaced by other products, yet many customers are curious about the difference between NLOS robot video transmitter and LOS robot video transmitter. What are the characteristics and differences between the two? Let me explain them to you today.


Here is the content list:

1. How to Realize NLOS Robot Video Transmitter Communication?

2. How to Realize LOS Robot Video Transmitter Communication?

3. How to Divide NLOS and NLOS Robot Video Transmitter?


How to Realize NLOS Robot Video Transmitter Communication?

As the working frequency range of drone video transmission system becomes higher and higher, the transmission bandwidth becomes wider, the limit of NOLS wireless video transmitter becomes greater. Anti-fading technology in NOLS drone video transmission system is studied to solve the reliability and effectiveness of the NOLS drone video transmission system. It is of great importance to improve the engineering utilization ability. In fact, the key to wireless video transmission solutions is anti-multipath, including OFDM, transceiver variety, sub channelization and so on.


Among them, technology of OFDM has been applied more and more widely in COFDM UAV video links, forest fire prevention, urban road monitoring and other image transmission fields. Variable drone video transmission systems have different spread characteristics, so appropriate COFDM system parameters should be selected to adapt to the corresponding channel characteristics.


How to Realize LOS Robot Video Transmitter Communication?

OLS spread refers to the direct transmitting of radio waves from the UAV video transmission system to the receiving point within the distance between the transmitting terminal and the receiving terminal. OLS wireless video transmitter solutions generally range from 20 km to 50 km, mainly for ultra-short wave and microwave communications.


According to different spread wireless video transmitter solutions, OLS spread can be divided into the following two categories:

1. Direct beam spread

A mode of spread in which radio waves radiated by a transmitting terminal, traveling in a straight line like light, are transmitted directly form wireless video transmitter solutions to a receiving point.


2. Earth reflected waves travel

A mode of transmission from a wireless video transmitter solution to a receiving point by reflection from the ground.


According to the different spatial positions at both ends of the receiver and the transmitter, the spread of OLS can be generally divided into three categories:

1. The first category refers to OLS spread on the ground, such as radio relay connection, COFDM UAV video and data links and mobile connection on the ground.

2. The second type refers to the OLS spread between ground and air targets such as drones and communication satellites.

3. The third category refers to the OLS communication between space communication systems, such as between aircraft and spacecraft.


How to Divide NLOS and NLOS Robot Video Transmitter?

Simply using these two terms, it is obvious that it is impossible to distinguish the actually diverse COFDM UAV video and data links, such as underwater sound and echo channel, etc.


In the actual network planning of mobile communication, most COFDM UAV video and data links can be divided into LOS and NLOS. Moreover, each standard reception and detection technology can be handled differently in these two environments. Therefore, the understanding of NLOS and LOS is a compulsory course for COFDM UAV video and data links personnel.


The higher the frequency, the shorter the wavelength, the weaker the diffraction ability of the wave, it is easy to be blocked when encountering obstacles, so it can only rely on straight line COFDM UAV video and data links spread.


802.16d drone video transmission system can support the range of OLS transmission frequency from 10GHz to 66GHz and NOLS transmission frequency below 11GHz. According to the spread characteristics of different frequency bands, application of drone video transmission system is also different. As for the 10GHz ~ 66GHz OLS transmission frequency band, the terminal needs to have an outdoor terminal, and its application is mainly to provide backhaul drone video transmission system for small-sized enterprises. For NOLS transmission frequency below 11GHz, its application will mainly focus on providing broadband data service for individual users, as it can achieve indoor coverage. In addition, 802.16 can also realize the back-end drone video transmission system function of enterprise wi-fi hot spots, as well as LAN interconnection, data line, narrow-band NOLS service and base station interconnection, etc.


Our NLOS robot video transmitter is widely used for HD video transmission ground to ground, while the latency is less than 50ms. If you are still worried, we also have a series of quality after-sales service. We try our best to serve you wholeheartedly, you will never regret buying our NLOS robot video transmitter.

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