Sum-Rate Maximization for Fluid Antenna Enabled Multiuser Communications

作者：Zhenqiao Cheng, Nanxi Li, Jianchi Zhu, Xiaoming She, Chongjun Ouyang, Peng Chen · 发表于：IEEE Communications Letters · 年份：2024 · DOI：10.1109/lcomm.2024.3378272 · 被引用次数：53 · 研究领域：Bluetooth and Wireless Communication Technologies、Wireless Communication Networks Research、Power Line Communications and Noise

A novel multiuser communication system with fluid antennas (FAs) is proposed, where the antenna position optimization is exploited to enhance the downlink sum-rate. The joint optimization of the transmit beamforming vector and transmit FA positions is studied for a multiuser multiple-input single-input system. An efficient algorithm is proposed to tackle the formulated non-convex problem via capitalizing on fractional programming, alternating optimization, and gradient descent methods. To strike a better performance-complexity trade-off, a zero-forcing beamforming-based design is also proposed as an alternative. Numerical investigations are presented to verify the efficiency of the proposed algorithms and their superior performance compared with the benchmark relying on conventional fixed-position antennas (FPAs).