A survey of indoor propagation characteristics is presented, including different models for path loss, shadowing and fast fading mechanisms, different channel parameters including signal strength, power delay, coherence bandwidth, Doppler spread and angle of arrival. The concepts of MIMO channels are also covered. The study also explores many types of deterministic channel modelling, such as Finite Difference Time Domain, Finite Integration Method, Ray tracing and the Dominant path model. Electromagnetic properties of building materials, including frequency dependence, are also investigated and several models for propagation through buildings are reviewed.

中文翻译：

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室内环境传播审查

介绍了室内传播特性的调查，包括路径损耗，阴影和快速衰落机制的不同模型，包括信号强度，功率延迟，相干带宽，多普勒扩展和到达角的不同信道参数。MIMO信道的概念也包括在内。该研究还探索了许多类型的确定性信道建模，例如时域有限差分，有限积分方法，光线跟踪和主导路径模型。还研究了建筑材料的电磁特性，包括频率依赖性，并审查了几种通过建筑物传播的模型。