重庆理工大学学报2024，Vol.38Issue(5)：286-293,8.DOI:10.3969/j.issn.1674-8425(z).2024.03.031
智能超表面辅助的OAM通信信道建模及容量分析
Capacity analysis and channel modeling of reconfigurable intelligent surface-assisted OAM communication systems
摘要
Abstract
Research on reconfigurable intelligent surface ( RIS ) assisted orbital angular momentum ( OAM ) communication systems mainly employs free-space propagation channels. However, the channel model fails to accurately describe the propagation characteristics of OAM signals. This paper studies the propagation characteristics of OAM signals in free-space scenarios. Based on our study, the RIS-assisted OAM channel model is built with Rice fading channel. The RIS-assisted OAM communication systems generates OAM signals with different modes by using RIS. Power allocation and RIS passive beam-forming are optimized by a joint optimization algorithm to improve the channel capacity, and the influence of signal-to-noise ratio ( SNR ) and transmission power on channel capacity is analyzed. Our simulation results show the proposed fading channel model describes the propagation character of OAM signals in RIS-assisted channels and achieves higher channel capacity.关键词
智能超表面/轨道角动量/信道建模/容量分析Key words
reconfigurable intelligent surface/orbital angular momentum/channel modeling/capacity analysis分类
信息技术与安全科学引用本文复制引用
朱启标,黎文文,王剑涛,罗斌..智能超表面辅助的OAM通信信道建模及容量分析[J].重庆理工大学学报,2024,38(5):286-293,8.基金项目
国家自然科学基金项目(61961024,62261037) （61961024,62261037）
江西省自然科学基金项目(20181BAB202001) （20181BAB202001）
江西省研究生创新专项基金项目(YC2022-S124) （YC2022-S124）
