Design of UAV Receiving System Based on Multi-frequency Automatic Search

This paper studies a UAV receiving system based on multi frequency point automatic search, and displays the received signal through OLED for human-computer interaction. Firstly, the system control chip controls the three channels to automatically search for different signal frequencies and receive the modulated signals transmitted from the transmitter. Then, the received signals are processed by the signal demodulation and low noise amplification of the receiving chip to realize the automatic search of the received signals without cross 24 frequency points. Finally, the RSSI strength is converted into digital quantities by A/D conversion, and the current signal is connected to the OLED display screen, outputting the received frequency data information.