Performance Investigation of Unmanned Aerial Vehicle Assisted Rate Splitting Multiple Access Cooperative Communication Systems in Nakagami-m Fading Channels
The challenges of scarce communication resources and uneven allocation in multi-user communication networks are investigated in the article with a focus on the Unmanned Aerial Vehicle(UAV)-assisted multi-user downlink communication network using Rate Splitting Multiple Access(RSMA)technology.In complex real-world communication environments,interference caused by useless signals due to frequency reuse is inevitable.Considering the co-channel interference affecting the data transmission between UAV and various user nodes in Nakagami-m fading channels,precise closed-form expressions for the outage probability and channel capacity of the system are derived.It is demonstrated that the diversity order is 0 resulted from the presence of co-channel interference for high Signal-to-Noise Ratio(SNR)regime systems.Moreover,under the same spatial model,the system performance using the RSMA communication scheme is superior to the Non-Orthogonal Multiple Access(NOMA)scheme.As the flight speed of UAV increases,the probability of establishing line-of-sight links for ground-to-air communication is decreased,leading to a degradation in system outage performance.Therefore,effective trade-offs for the overall UAV communication system need to be achieved by comprehensively considering the flight speed of UAV,multiple access methods,system performance,and communication connectivity,in order to meet the practical communication needs of users.
Unmanned Aerial Vehicle(UAV)communicationRate Splitting Multiple Access(RSMA)Co-channel interferenceLine of sight linkOutage probability
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