ストリートでの移動電波伝搬の電磁環境特性

概要

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This paper presents a 2-dimensional model of mobile radio wave propagation environment based on the finite difference time domain (FDTD) method. The research seeks to model the multipath fading due to scattering by buildings and structures indoor. Currently. most mobile radio propagation channels are modeled as a linear filter having the impulse response:[numerical formula] (1), where t, τ are the observation time and time of impulse application respectively, N(τ) is the number of multipath components. δ is the delta function, and {a_k(t)}, {τ_k(t)}, {θ_k(t)} are the random time-varying amplitude, arrival-time and phase sequences respectively. A time-invariant from, suggested by Turin for the multipath channel, has been applied successfully to some mobile radio models. In this case(1) reduces to:[numerical formula] (2).
社団法人電子情報通信学会の論文
1997-08-13