一种卫星多波束多用户稀疏信道模型
首发时间:2024-03-08
摘要:针对卫星通信系统中,相控阵天线多波束多用户的通信场景,提出一种在角度-时延域稀疏的信道模型。该模型通过分析信道在角度域的信道协方差矩阵来得到信道在角度域的稀疏性,通过时延域少量的多径得到时延域的稀疏性。通过仿真分析,该模型能够反应随着卫星运动,不同方位角时的信道的稀疏性特征,为低轨卫星大规模部署后的通信测试和使用提供了理论基础。
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A satellite multi-beam multi-user sparse channel model
Abstract:The channel model with sparsity in angle-delay domain is proposed for the multi-beam multi-user communication scenario with phased array antennas in satellite communication system. The sparsity of the model in the angle domain is obtained by analysing the channel covariance matrix of the channel in the angle domain, and the sparsity in the delay domain is obtained by a small amount of multipath in the delay domain. Through simulation analysis, the model is able to reflect the sparsity characteristics of the channel at different azimuths with the satellite motion, which provides the theoretical basis for the communication test and use of LEO satellites after large-scale deployment.
Keywords: wireless communication phased array antenna satellite channel channel sparsity
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