Zhang Zheming, He Yixin, Lei Yifan, Cai Zehui, Huang Fanghui, Zhao Xingchen, Wang Dawei, Li Lujuan
College of Information Science and Engineering, Jiaxing University, Jiaxing 314001, China.
Sino-European Joint Lab for Health Information Processing and Applications, Jiaxing University, Jiaxing 314001, China.
Entropy (Basel). 2025 Aug 27;27(9):907. doi: 10.3390/e27090907.
The increasing number of intelligent connected vehicles (ICVs) is leading to a growing scarcity of spectrum resources for the Internet of Vehicles (IoV), which has created an urgent need for the use of full-duplex non-orthogonal multiple access (FD-NOMA) techniques in vehicle-to-everything (V2X) communications. Meanwhile, for the flexibility of autonomous aerial vehicles (AAVs), V2X communications assisted by AAVs are regarded as a potential solution to achieve reliable communication between ICVs. However, if the integration of FD-NOMA and AAVs can satisfy the requirements of V2X communications, then quickly and accurately analyzing the total achievable rate becomes a challenge. Motivated by the above, an accurate analytical expression for the total achievable rate over Rician fading channels is proposed to evaluate the transmission performance of NOMA-enhanced AAV-assisted IoV with imperfect channel state information (CSI). Then, we derive an approximate expression with the truncated error, based on which the closed-form expression for the approximate error is theoretically provided. Finally, the simulation results demonstrate the accuracy of the obtained approximate results, where the maximum approximate error does not exceed 0.5%. Moreover, the use of the FD-NOMA technique in AAV-assisted IoV can significantly improve the total achievable rate compared to existing work. Furthermore, the influence of key network parameters (e.g., the speed and Rician factor) on achievable rate is thoroughly discussed.
智能网联汽车（ICV）数量的不断增加，导致车联网（IoV）的频谱资源日益稀缺，这使得在车与万物（V2X）通信中迫切需要使用全双工非正交多址接入（FD-NOMA）技术。同时，考虑到自主飞行器（AAV）的灵活性，由AAV辅助的V2X通信被视为实现ICV之间可靠通信的一种潜在解决方案。然而，如果FD-NOMA与AAV的集成能够满足V2X通信的要求，那么快速准确地分析总可达速率就成为一项挑战。受上述因素的启发，本文提出了一种在莱斯衰落信道上总可达速率的精确解析表达式，用于评估信道状态信息（CSI）不完善时非正交多址接入增强型AAV辅助车联网的传输性能。然后，我们推导了一个带有截断误差的近似表达式，并在此基础上从理论上给出了近似误差的闭式表达式。最后，仿真结果验证了所获近似结果的准确性，其中最大近似误差不超过0.5%。此外，与现有工作相比，在AAV辅助车联网中使用FD-NOMA技术可显著提高总可达速率。此外，还深入讨论了关键网络参数（如速度和莱斯因子）对可达速率的影响。
