We consider the movable antenna (MA) array-enabled wireless communication with coordinate multi-point (CoMP) reception, where multiple destinations adopt the maximal ratio combination technique to jointly decode the common message sent from the transmitter equipped with the MA array. Our goal is to maximize the effective received signal-to-noise ratio, by jointly optimizing the transmit beamforming and the positions of the MA array. Although the formulated problem is highly non-convex, we reveal that it is fundamental to maximize the principal eigenvalue of a hermite channel matrix which is a function of the positions of the MA array. The corresponding sub-problem is still non-convex, for which we develop a computationally efficient algorithm. Afterwards, the optimal transmit beamforming is determined with a closed-form solution. In addition, the theoretical performance upper bound is analyzed. Since the MA array brings an additional spatial degree of freedom by flexibly adjusting all antennas' positions, it achieves significant performance gain compared to competitive benchmarks.

翻译：本文研究了基于可移动天线（MA）阵列的协同多点（CoMP）接收无线通信系统，其中多个目的地采用最大比合并技术联合解码由配备MA阵列的发射机发送的公共消息。我们的目标是通过联合优化发射波束成形和MA阵列的位置来最大化有效接收信噪比。尽管所构建的问题具有高度非凸性，但我们揭示其核心在于最大化作为MA阵列位置函数的埃尔米特信道矩阵的主特征值。该子问题仍为非凸问题，为此我们提出了一种高效计算算法。随后，我们给出了最优发射波束成形的闭式解。此外，还分析了理论性能上界。由于MA阵列通过灵活调整所有天线位置引入了额外的空间自由度，相较于竞争性基准方法，其实现了显著的性能增益。