Flexible Precoding for Multi-User Movable Antenna Communications

被引：2
|
作者：
Yang, Songjie [1 ]
Lyu, Wanting [1 ]
Ning, Boyu [1 ]
Zhang, Zhongpei [2 ,3 ]
Yuen, Chau [4 ]
机构：
[1] Univ Elect Sci & Technol China, Natl Key Lab Wireless Commun, Chengdu 611731, Peoples R China
[2] Donghai Lab Zhejiang, Zhoushan, Zhejiang, Peoples R China
[3] Univ Elect Sci & Technol China, Natl Key Lab Wireless Commun, Chengdu 611731, Peoples R China
[4] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore, Singapore
来源：
IEEE WIRELESS COMMUNICATIONS LETTERS | 2024年 / 13卷 / 05期
关键词：
Movable antenna; flexible precoding; sparse optimization; regularized zero-forcing;
D O I：
10.1109/LWC.2024.3372569
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
This letter rethinks traditional precoding in multi-user wireless communications with movable antennas (MAs). Utilizing MAs for optimal antenna positioning, we introduce a sparse optimization (SO)-based approach focusing on regularized zero-forcing (RZF). This framework targets the optimization of antenna positions and the precoding matrix to minimize inter-user interference and transmit power. We propose an off-grid regularized least squares-based orthogonal matching pursuit (RLS-OMP) method for this purpose. Moreover, we provide deeper insights into antenna position optimization using RLS-OMP, viewed from a subspace projection angle. Overall, our proposed flexible precoding scheme demonstrates a sum rate that exceeds more than twice that of fixed antenna positions.
引用
收藏
页码：1404 / 1408
页数：5
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