Signal-Code Design for Spread Spectrum Channels with Packet Errors Occuring

The article discusses the features of the development of signal-code structures of a spread spectrum signals for channels with packet errors. Among these channels is the UAV control channel located at a great distance from the ground control station (channel A2G). The channel model is complex due to a whole set of factors, which include multipath, the unsteady nature of external conditions, and low declination angles. The last condition leads to a significant spreading of the power delay profile, which in the presence of Doppler scattering causes the phenomenon of error packing. Additional restrictions in solving the problem are due to the requirement to ensure the secrecy of the transmission channel. The paper investigates the multiplicity of packet errors at the channel output. An original result was obtained on reducing the multiplicity due to the use of a matched filter with embedded PSP, which formed the basis of the signal-code structures with Reed-Solomon channel coding.