室内直达与非直达环境无线传播综合信道建模

发布时间：2018-01-19 19:33

本文关键词： 波达信号多普勒功率谱密度散射体参考信道模型　出处：《物理学报》2015年17期 　论文类型：期刊论文

【摘要】：本文主要针对室内无线传播信道直达(line of sight,LOS)与非直达(no line of sight,NLOS)环境,引入参考模型研究其建模设计及其相关统计特性.文中提出了一种基于几何散射模型的综合改进室内参考信道模型,假设将无限数量的散射体均匀分布在三维空间的一个二维(two dimensional,2D)水平面上.本文推导了电磁波达信号到达角(angle of arrival,AOA)概率分布函数(probability density function,PDF)、多普勒功率谱密度(power spectral Density,PSD)、时间自相关函数(autocorrelation function,ACF)的解析表达式,并分析其重要参数对函数的影响.此外,本文还通过非现实参考模型提出了一种高效的SOC(Sum of Cisoids)信道仿真模型,同时提出了设计SOC信道仿真模型的两种有效参数计算方法,并比较两者的计算性能.仿真结果表明,信道仿真模型的统计特性与参考模型相匹配,即室内参考模型可以通过的SOC信道仿真模型来近似,同时信道仿真模型可以很好的应用于评估室内无线通信系统的性能,拓宽了室内无线信道建模的研究,同时减少实现开支.
[Abstract]:This paper focuses on the indoor wireless channel direct line of sight low) and non-direct line of sight. The reference model is introduced to study its modeling design and related statistical properties. A comprehensive improved indoor reference channel model based on geometric scattering model is proposed. Suppose an infinite number of scatterers are uniformly distributed in a two-dimensional dimensional in three-dimensional space. In this paper, the angle of arrival of the electromagnetic arrival signal on the plane of 2D is derived. A probability distribution function, probability density function (PDF). Doppler power spectral density and autocorrelation function. The analytical expression of ACFS and the influence of its important parameters on the function. This paper also proposes an efficient SOC(Sum of Cisoids channel simulation model based on the unrealistic reference model. At the same time, two effective parameter calculation methods for designing SOC channel simulation model are proposed, and their computational performance is compared. The simulation results show that the statistical characteristics of the channel simulation model match the reference model. That is, the indoor reference model can be approximated by the SOC channel simulation model. Meanwhile, the channel simulation model can be used to evaluate the performance of indoor wireless communication system and broaden the research of indoor wireless channel modeling. At the same time reduce the cost of realization.
【作者单位】：南京信息工程大学电子与信息工程学院;日本国立新泻大学工学部;杭州电子科技大学通信工程学院;
【基金】：国家自然科学基金(批准号:61372128) 江苏省高校自然科学科学研究重大计划项目(批准号:14KJA510001) 中国博士后基金(批准号:010986678) 江苏省科技支撑计划(工业)项目(批准号:BE2011195)资助的课题~~
【分类号】：TN92
【正文快照】： 1引言近年来室内无线通信系统和局域网的应用越来越广泛,针对室内无线电传播信道的特性进行了许多研究.建立准确的信道多径效应的无线信道模型,是未来进一步分析MIMO系统的重要基础.同时在无线移动通信中的信道编码、信道均衡、分集接收以及分集阵列信号处理算法的设计都极大

【参考文献】