Movable antenna (MA) provides an innovative way to arrange antennas that can contribute to improved signal quality and more effective interference management. This method 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 near-optimal positions of the MAs, we introduce a solution based on projected particle swarm optimization (PPSO), which can circumvent common suboptimal positioning issues. Moreover, numerical results reveal that the PPSO method leads to a 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局方式，有助于提升信号质量并实现更有效的干扰管理。该方法对于同频同时（CCFD）全双工无线通信尤为有益，因为该通信方式长期受困于自干扰（SI）问题——通常远强于目标接收信号。通过动态调整发射/接收天线的位置，我们既能抑制自干扰，又能增强对来波的接收效果。为此，本文提出一种基于可移动天线的点对点CCFD新系统，并构建了两个CCFD终端的最小可达速率模型。为最大化该最小可达速率并确定可移动天线的近优位置，我们引入了基于投影粒子群优化（PPSO）的求解方案，可规避常见的次优定位问题。数值结果表明，相比传统交替位置优化（APO）方法，PPSO方法能带来更优性能。研究还表明，采用可移动天线的CCFD系统性能优于固定位置天线（FPA）系统。