Movable antenna (MA) provides an innovative way to arrange antennas that can contribute to improved signal quality and more effective interference management. This technology is especially beneficial for co-frequency co-time full-duplex (CCFD) wireless communication, which struggles with self-interference (SI) that usually overpowers the desired incoming signals. By dynamically repositioning transmit/receive antennas, we can mitigate the SI and enhance the reception of incoming signals. Thus, this paper proposes a novel MA-enabled point-to-point CCFD system and formulates the minimum achievable rate of two CCFD terminals. To maximize the minimum achievable rate and determine the positions of MAs, we introduce a solution based on projected particle swarm optimization (PPSO), which can circumvent common suboptimal positioning issues. Moreover, simulation results reveal that the PPSO method leads to better performance compared to the conventional alternating position optimization (APO). The results also demonstrate that an MA-enabled CCFD system outperforms the one using fixed-position antennas (FPAs).

翻译：可移动天线（MA）提供了一种创新的天线布置方式，有助于改善信号质量和实现更有效的干扰管理。该技术对于同频同时全双工（CCFD）无线通信尤其有益，因为后者通常受到自干扰（SI）的困扰，这种干扰往往会淹没期望的接收信号。通过动态调整发射/接收天线的位置，我们可以抑制自干扰并增强对接收信号的接收。因此，本文提出了一种新颖的基于可移动天线的点对点CCFD系统，并推导了两个CCFD终端的最小可达速率。为了最大化该最小可达速率并确定可移动天线的最优位置，我们引入了一种基于投影粒子群优化（PPSO）的解决方案，该方法能够规避常见的次优定位问题。此外，仿真结果表明，与传统的交替位置优化（APO）方法相比，PPSO方法能带来更好的性能。结果还表明，采用可移动天线的CCFD系统性能优于使用固定位置天线（FPA）的系统。