室内场景亚太赫兹信道测量与混合信道建模

Sub-THz channel measurement and hybrid channel modeling for indoor scenarios

针对当前准确定性信道模型不能准确地描述室内场景亚太赫兹信道特性的问题,提出一种基于准确定性的亚太赫兹混合信道建模模型。首先,基于亚太赫兹信道多径稀疏簇特性,利用镜像法追踪视距径和低阶反射径建模确定性部分。其次,结合220 GHz室内大厅及132 GHz走廊场景测量数据,利用扩展的SV模型分别统计确定簇和随机簇内的散射径,对数正态分布描述簇内多径数分布,完成随机性部分建模。确定性信道冲激响应hD和随机性信道冲激响应hS相加获得混合信道冲激响应h。最后,通过科尔莫戈罗夫-斯米尔诺夫检验混合模型准确性,以及与扩展的SV模型小尺度参数的均方根误差和结构相似性比较验证混合模型的有效性,结果表明,所提出的模型能够准确有效地描述亚太赫兹信道特性。

In response to the challenge posed by the limitations of traditional Quasi-Deterministic channel models in accurately characterizing the properties of indoor sub-THz channels,a Quasi-Deterministic hybrid channel modeling model for the sub-terahertz band was proposed.Firstly,considering the multipath sparse cluster characteristics of the sub-THz channel,the deterministic part was modeled by tracking the line-of-sight path and the low-order reflection path using the mirror method.Then,combining 220 GHz hall and 132 GHz corridor indoor scene measurements,using the extended SV(Saleh Valenzuela)model,the scattering paths within deterministic clusters and random clusters were separately counted,with a log-normal distribution describing the multipath distribution within clusters,thus completing the modeling of the stochastic component.The impulse response of the hybrid channel h was obtained by adding the deterministic channel impulse response hD and the random channel impulse response hS.Generally,the accuracy of the hybrid model was verified by Kolmogorov-Smirnov test,and its validity was confirmed by comparing the root-mean-square error and structural similarity indices of the small scale parameters of the extended SV model.The results demonstrate that the proposed model can accurately and effectively characterize the sub-THz channel.