Beam alignments based on the spectrum decomposition of orbital angular momentums for acoustic-vortex communications

作     者：Gepu Guo Xinjia Li Qingdong Wang Yuzhi Li Qingyu Ma Juan Tu Dong Zhang 郭各朴;李昕珈;王青东;李禹志;马青玉;屠娟;章东

作者机构：School of Computer and Electronic InformationNanjing Normal UniversityNanjing 210023China Haiying Enterprise Group Co.Ltd.Wuxi 214061China College of Ocean Science and EngineeringShandong University of Science and TechnologyQingdao 266590China Institute of AcousticsNanjing UniversityNanjing 210093China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2022年第31卷第12期

页      面：296-304页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11934009 11974187 and 12174198) 

主　　题：acoustic-vortex beam beam alignment orbital angular momentum(OAM)spectrum least standard deviation acoustic communication 

摘      要：Given the enhanced channel capacity of wave chirality,acoustic communications based on the orbital angular momentum(OAM)of acoustic-vortex(AV)beams are of significant interest for underwater data ***,the stringent beam alignment is required for the coaxial arrangement of transceiver arrays to ensure the accuracy and reliability of OAM *** avoid the required multiple measurements of the traditional orthogonality based algorithm,the beam alignment algorithm based on the OAM spectrum decomposition is proposed for AV communications by using simplified *** studies of the single-OAM and OAM-multiplexed AV beams show that the error of the OAM spectrum increases with the translation distance and the deflection angle of the transceiver *** achieve an ideal arrangement,two methods of the single-array translation alignment and the dual-array deflection alignment are developed based on the least standard deviation of the OAM spectrum(SD-OAM).By decreasing the SD-OAM towards zero using transceiver arrays of 16 transmitters and 16 receivers,accurate beam alignments are accomplished by multiple adjustments in three *** proposed method is also demonstrated by experimental measurements of the OAM dispersion and the SD-OAM for misaligned *** results demonstrate the feasibility of the rapid beam alignment based on the OAM spectrum decomposition by using simplified transceiver ring-arrays,and suggest more application potentials for acoustic communications.