The synergy of fluid-based reconfigurable antenna (FA) technology and full-duplex (FD) communications can be jointly beneficial, as FD can enhance the spectral efficiency of a point-to-point link, while the new degree of freedom offered by the FA technology can be exploited to handle the overall interference. Hence, in this paper, an analytical framework based on stochastic geometry is developed, aiming to assess both the outage and average sum-rate performance of large-scale FA-aided FD cellular networks. In contrast to existing studies, where perfect channel state information is assumed, the developed framework accurately captures the impact of channel estimation (CE) on the performance of the considered network deployments, as well as the existence of residual loop-interference (LI) at the FD transceivers. Particularly, we focus on a limited coherence interval scenario, where a novel sequential linear minimum-mean-squared-error-based CE method is performed for all FA ports and LI links, followed by data reception from the port with the strongest estimated channel. By using stochastic geometry tools, analytical expressions for the outage and the average sum-rate performance are derived. Our results reveal that FA-aided FD communications experience an improved average sum-rate performance of around 45\% compared to conventional FD communications.

翻译：基于流体重构天线技术与全双工通信的协同作用具有双重优势，全双工可提升点对点链路的频谱效率，而天线技术提供的新自由度则能用于处理整体干扰。为此，本文基于随机几何理论建立了分析框架，旨在评估大规模天线辅助全双工蜂窝网络的中断概率与平均和速率性能。与现有研究假设完美信道状态信息不同，本框架精确捕捉了信道估计对所考虑网络部署性能的影响，以及全双工收发器残留环路干扰的存在性。具体而言，我们聚焦于有限相干时间间隔场景，对所有天线端口及环路干扰链路实施一种基于序列线性最小均方误差估计的信道估计方法，随后从估计信道最强的端口接收数据。通过随机几何工具，推导出中断概率与平均和速率的解析表达式。结果表明，与传统全双工通信相比，天线辅助全双工通信的平均和速率性能提升约45%。