Wireless Data Transmission system is used for data transmission between the flight control and the ground station. The basic principle is that the modem works wirelessly. To put it bluntly, it is a data line, but it is wireless and has the function of a data line. The purpose is to facilitate parameter adjustment, telemetry data, remote monitoring, no need to plug in wires, and can adjust parameters during flight and send back the flight data of the flight controller.

In short, this "data line" is not simple, and there are many precautions. Here I will introduce the origin of this "data line".

Which system of the UAV is the data transmission in?

• Help the UAV to receive instructions from the ground station;
• Send the image information collected by the UAV payload system to the ground station;
• Transmit the UAV's attitude, position, altitude and power back to the ground station.

What is a Wireless Radio digital link

• Airborne data transmission station: connected to the UAV's autopilot through a data cable;
• Ground data transmission station: connected to the UAV ground station through data lines.

How to choose a radio data link

• Small size, light weight, low power consumption;
• Convenient wiring and easy to use;
• Frequency hopping spread spectrum function, strong anti-interference ability: the higher the frequency hopping combination, the stronger the anti-interference ability. General equipment can achieve dozens or hundreds of frequency hopping combinations, and equipment with excellent performance can achieve 60,000 a frequency hopping combination.
• With store and forward function.
• With data encryption function: improve the reliability of data transmission and prevent data leakage. Common encryption methods include DES, AES, etc.
• High speed: UAV data transmission radio station belongs to the category of narrow-band long-distance transmission, and the data rate of 115200bps belongs to high speed.
• With high sensitivity, low power consumption, long-distance, high-speed frequency hopping spread spectrum, time division duplex full duplex: Since the UAV is powered by batteries, and the transmission distance is long, the power consumption of the device is required to be low (that is, low transmission power ), high receiving sensitivity (the higher the sensitivity, the farther the transmission distance). Generally, the receiving performance of the device is measured by the receiving sensitivity under the bit error rate, for example: –106 dBm @ 10-6BER.
• Complete certification: with CE, FCC, ETSI and other European and American mainstream certification.