计算机科学 ›› 2022, Vol. 49 ›› Issue (7): 297-303.doi: 10.11896/jsjkx.210600075
吴苏洁1, 周杰1,2, 王学英1, 吕智康1, 邵根富3
WU Su-jie1, ZHOU Jie1,2, WANG Xue-ying1, LYU Zhi-kang1, SHAO Gen-fu3
摘要: 米波作为5G通信的重要核心技术,具有广阔的发展前景。随着通信频率的提升,天气(尤其是降雨环境)对信号传播的影响日益增大。为了建立准确有效的传播信道模型,针对降雨环境下车对基站移动通信场景,提出了基于25GHz,30GHz和78GHz的三维毫米波的MIMO空间信道模型。首先介绍了雨滴的几何物理特性,然后对雨衰工程模型作了简要描述,在此基础上提出关于本模型的动态雨衰衰减表达式。该模型考虑了基站与信号接收机的视距与非视距路径,以及接收机运动和动态散射簇对信道在时域和空间域上的非平稳性。最后采用生灭过程对信道进行理论分析,推导频率、降雨量、俯仰角等参数对互相关函数以及信道容量的影响。通过与以往文献实测数据的对比发现,该模型与实际测量结果拟合程度高。该研究对降雨环境下无线通信系统的应用具有重要的理论和实际意义,丰富了移动无线通信信道模型的研究和应用。
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