南京大学学报（自然科学版）2024，Vol.60Issue(2)：339-344,6.DOI:10.13232/j.cnki.jnju.2024.02.014
基于OAM复用信号高效调制解调的声学超表面
Acoustic metasurfaces for efficient modulation and demodulation of OAM multiplexed signals
摘要
Abstract
Orbital angular momentum(OAM)multiplexing has been suggested as a potential solution to increase the data capacity of acoustic communication systems.A method of modulation and demodulation of OAM multiplexed signals using acoustic metasurfaces is proposed in this manuscript.The amplitude and phase of independent acoustic orbital angular momentum(AOAM)multiplexed signal provide orthogonal degrees of freedom.By designing appropriate acoustic metasurfaces and combining them with binary differential phase coding techniques,we demonstrated that efficient modulation and fast demodulation of AOAM multiplexed signals can be achieved.Orthogonal acoustic spiral modes prevent mode coupling and crosstalk,enhancing acoustic multiplexing.The resonance-based structure provides signal frequency selectivity,boosting efficiency and simplifying terminal equipment for practical applications,which leads to the creation of high-capacity acoustic communication systems.关键词
声学超表面/声轨道角动量/声信号复用Key words
acoustic metasurfaces/acoustic orbital angular momentum/acoustic signal multiplexing分类
物理学引用本文复制引用
刘智,黄保霖,林玮,赵瑾瑜..基于OAM复用信号高效调制解调的声学超表面[J].南京大学学报（自然科学版）,2024,60(2):339-344,6.基金项目
安徽省自然科学基金(1908085QA39) （1908085QA39）
