AI 中文总结
该研究针对两跳AF无人机中继，受FAA启发提出位置后验驱动的子阵列尺寸与功率控制设计，可平衡阵列增益与指向鲁棒性，在t=8s时于0.15W预算下提升服务成功率并节省发射功率。
AI 中文摘要
本文针对两跳放大转发（AF）无人机（UAV）中继，开发了受流体天线阵列（FAA）启发的子阵列尺寸与发射功率设计，采用逐步收缩的用户位置后验。一个可重构的连续子阵列用于第一跳接收和第二跳转发，其激活尺寸共同决定接收增益、转发增益和波束宽度。通过自适应控制有效孔径，所提设计利用几何可重构性，在位置不确定性下平衡阵列增益与指向鲁棒性。将位置协方差投影到阵列方向，得到与方向不确定性成反比的闭式方向受限尺寸。后验样本通过两跳速率模型传播，随后选择子阵列尺寸和发射功率以最小化无人机功率，同时满足最差用户的下尾速率要求和硬件功率限制。在真实用户位置的瞬时两跳莱斯信道上对规划配置进行验证，在t=8s时，所提设计在配对可行几何结构上相比全阵列窄波束传输节省3.17dB，在0.15W功率预算下实现60.0%的服务成功率，而固定8单元子阵列的服务成功率为43.2%。
英文摘要
This paper develops fluid antenna array (FAA)-inspired subarray sizing and transmit-power design for a two-hop amplify-and-forward (AF) unmanned aerial vehicle (UAV) relay using progressively contracting user-location posteriors. A contiguous reconfigurable subarray is shared by first-hop reception and second-hop forwarding, such that its active size jointly determines the receive gain, forwarding gain, and beamwidth. By adaptively controlling the effective aperture, the proposed design exploits geometric reconfigurability to balance array gain against pointing robustness under location uncertainty. Projecting the position covariance onto the array direction yields a closed-form direction-limited size inversely proportional to directional uncertainty. Posterior samples are propagated through the two-hop rate model, and the subarray size and transmit power are then selected to minimize UAV power subject to a worst-user lower-tail rate requirement and hardware power limits. The planned configuration is further audited over instantaneous two-hop Rician channels at the true user positions. At t = 8 s, the proposed design saves 3.17 dB over full-array narrow-beam transmission on paired feasible geometries and achieves 60.0% service success at a 0.15-W budget, compared with 43.2% for a fixed eight-element subarray.
Comments6 pages, 5 figures
