稀疏多径下基于PASR的涡旋电磁波传输特性  

PASR-based Propagation Characteristics of Vortex Electromagnetic Wave in Sparse Multipath Environments

作　　者：李嘉欣 赵恒凯[1] LI Jiaxin;ZHAO Hengkai(School of Communication and Information Engineering,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学通信与信息工程学院,上海200444

出　　处：《移动通信》2022年第10期71-76,共6页Mobile Communications

摘　　要：涡旋波束的中空发散特性,导致其远距离传输下接收困难。且传输信道中的多径效应会造成涡旋波束的相位畸变和模态间干扰问题,影响涡旋电磁波信号的传输质量。针对上述问题,建立了基于部分孔径取样接收方案的稀疏多径涡旋电磁波无线传输模型,分析了多径数目、天线阵列数目、传输距离、信噪比等参数对部分接收涡旋通信系统传输性能的影响。仿真结果表明:随着传输距离不断增大,基于部分孔径取样接收的涡旋系统与基于完整孔径取样接收的涡旋系统信道容量间的相对差异越来越小,由此证明了在稀疏多径环境中,部分孔径取样接收涡旋通信系统的可行性。It is difficult to receive the vortex beam over a long distance transmission due to the hollow divergence characteristic.Multipath effect in the transmission channel causes the phase distortion and inter-modal interference of vortex beam,which will affect the transmission quality of vortex electromagnetic signal.To solve the above problems,a wireless transmission model with the sparse multipath vortex electromagnetic wave is established based on partial aperture sampling receiving(PASR)scheme.The key parameters,such as the number of transmission paths and antennas,transmission distance,signal-to-noise ratio,are analyzed to investigate their effects on the transmission performance of the partially received vortex communication system.The simulation results show that with the increasing of the transmission distance,the relative difference of channel capacity between the PASR-based vortex system and the one based on whole angular sampling receiving scheme is becoming smaller.The results verify the feasibility of the PASR vortex communication system in the sparse multipath environments.

关 键 词：涡旋电磁波 轨道角动量 稀疏多径 部分孔径取样接收 

分 类 号：TN929.5[电子电信—通信与信息系统]