We consider the movable-antenna (MA) arrayenabled 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：本文研究基于移动天线（MA）阵列的无线通信系统，结合协调多点（CoMP）接收技术，其中多个目的地采用最大比合并技术联合解码由配备MA阵列的发射器发送的公共消息。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。尽管所构建的问题高度非凸，但我们发现其关键在于最大化一个关于MA阵列位置的厄米信道矩阵的主特征值。相应的子问题仍是非凸的，为此我们开发了一种计算高效的算法。随后，通过闭式解确定了最优发射波束成形。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的位置带来额外的空间自由度，与竞争性基准方法相比，其性能提升显著。