Construction of a Communication Channel with UAVs Based on Direct Sequence Spread Spectrum Signals

Unmanned aerial vehicles (UAV) are actively used to solve various problems: monitoring the earth's surface, delivering goods, relaying signals, special military tasks, etc. A feature of UAV monitoring of the earth's surface is the need to transmit the video stream recorded by the on-board optical-electronic system of the device to a ground control point in real time. To transmit high-quality video, a radio channel with high information transmission speed is required. The construction of such communication channels is possible through the use of signals with complex signal-code structures. One of the ways to increase the efficiency of information transmission and construct complex signal-code structures is to use the method of expanding the signal spectrum. This article discusses the option of building a communication channel with medium-range unmanned aerial vehicles based on direct sequence spread spectrum (DSSS) signals. It has been shown that it is possible to build a communication channel with a UAV with a speed of up to 150 Mbit/s on a range of more than 100 km when using not very long pseudorandom sequence (PRS). The use of longer PRS will significantly reduce the communication range, but will significantly increase the energy secrecy of the channel, which is important for special-purpose UAVs.