基于非对齐UCA的部分涡旋波的稀疏多径传输特性研究

Transmission Characteristics of Partial Vortex Electromagnetic Waves in Sparse Multipath Environments Based on Non-aligned UCA

涡旋电磁波在稀疏多径场景中传输时存在模态间干扰,且波束的发散特性导致其远距离接收困难。针对上述问题,研究了收发端天线阵列非对齐场景下,采用部分孔径取样接收方案的涡旋波稀疏多径传输特性,分析了天线偏向角、多径数目、传输距离等参数对部分涡旋波传输性能的影响。结果表明:在远距离传输情况下,基于部分孔径取样接收的涡旋通信系统与基于完整孔径取样接收相比,容量的衰减程度更小,稳定性更好。

There is inter-mode interference when vortex electromagnetic waves is transmitted in sparse multipath environments,and the divergence of vortex beam makes it difficult to receive it after long distance transmission.To solve the above problems,this paper studies the sparse multipath transmission characteristics of vortex wave using partial angular sampling receiving(PASR) scheme based non-aligned UCA,the effects of antenna deflection angle,number of multipaths and transmission distance on the transmission performance of partial vortex wave are analyzed.The results show that the vortex communication system based on PASR scheme has less capacity attenuation and better stability than that based on whole angular sampling receiving scheme after long distance transmission.