Research On Key Technology Of Unmanned Aerial Vehicle Network Transmission

The in-band full-duplex UAV relaying network has received extensive attention in recent years,which can be a new technology for mobile communication in 5G/6G.This network can expand the wireless communication network to achieve enhanced coverage and higher throughput.In this paper,we discuss several existing problems of massive users’ full-duplex UAV relaying networks.First,we discuss which channel coding is more suitable for UAV networks.We compared the low-density parity-check codes(LDPC)and sparse superposition codes(SPARC).Under the same average bit energy,code length,and code rate,the average bit error rate of the appropriate LDPCs is better than that of the SPARCs.Second,we analyze optimal sum-rate maximization in a non-orthogonal multiple access system in an in-band full-duplex UAV relaying network.In the analysis,we have considered the presence of channel estimation error and quantization error of analog-to-digital converters(ADCs).In addition,this paper also analyzes the ergodic rate and the outage probability in this network.We derive closed and exact approximate expressions for ergodic rate and outage probability,respectively.Monte Carlo simulations verified our theoretical results.Simulation results show that system performance is more sensitive to the signal-to-noise ratio,loopback interference,and channel estimation error levels than the quantization bits.When the quantization bits are sufficient,the system performance is no different from an ideal ADCs system.