Multi-Beam Forming With Movable-Antenna Array

被引：22

作者：

Ma, Wenyan ^{[1
]}

Zhu, Lipeng ^{[1
]}

Zhang, Rui ^{[1
,2
]}

机构：

[1] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117583, Singapore

[2] Chinese Univ Hong Kong, Shenzhen Res Inst Big Data, Sch Sci & Engn, Shenzhen 518172, Guangdong, Peoples R China

来源：

IEEE COMMUNICATIONS LETTERS | 2024年 / 28卷 / 03期

关键词：

Antenna arrays; Array signal processing; Optimization; Three-dimensional displays; Linear antenna arrays; Directive antennas; Interference suppression; Movable-antenna (MA) array; multi-beam forming; beamforming gain; interference suppression;

D O I：

10.1109/LCOMM.2024.3350647

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

Conventional multi-beam forming with fixed-position antenna (FPA) arrays needs to trade-off between maximizing the beamforming gain over desired directions and minimizing the interference power over undesired directions. In this letter, we study the enhanced multi-beam forming with a linear movable-antenna (MA) array by exploiting the new degrees of freedom (DoFs) via antennas' position optimization. Specifically, we jointly optimize the antenna position vector (APV) and antenna weight vector (AWV) to maximize the minimum beamforming gain over multiple desired directions, subject to a given constraint on the maximum interference power over undesired directions. We propose an efficient alternating optimization algorithm to find a suboptimal solution by iteratively optimizing one of the APV and AWV with the other being fixed. Numerical results show that the proposed multi-beam forming design with MA arrays can significantly outperform that with the traditional FPA arrays and other benchmark schemes in terms of both beamforming gain and interference suppression.

引用

页码：697 / 701

页数：5

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