计算机科学 ›› 2017, Vol. 44 ›› Issue (3): 84-88.doi: 10.11896/j.issn.1002-137X.2017.03.020
陈雯雯,王亚林,周杰
CHEN Wen-wen, WANG Ya-lin and ZHOU Jie
摘要： 在三维(3 Dimensional,3D)空间域无线通信信道建模中,针对不同环境中仰角(Elevation Angle,EA)分布的复杂性,提出一种指数型概率分布,然后对这种分布下的无线信道进行建模,最后对接收端的多普勒功率谱密度(Power Spectral Density,PSD)和信号特性进行分析与仿真。采用近似算法推导出多普勒PSD的解析式,同时对Rayleigh 衰落信道中接收信号包络、平方包络的功率谱及时延相位差的概率密度函数进行研究。实验结果表明,所提出的三维无线信道模型在进行参数估计时符合相关理论与实际经验,同时指数函数模型的单变量特性使其在适应不同实际信道环境时非常灵活,因此可以对多种无线信道环境下的信道特征进行参数估计。
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