Angular Doppler characterization in indoor channels

This paper addresses directional properties of the Doppler effect of the measured MIMO radio channel in indoor environments. The evaluation of the data is based on spectral analysis in angular and Doppler domains of the estimated MIMO channel transfer function represented using tensors. The analysis is conducted separately for the specular and the diffuse scattering components of the measured propagation channels. It is shown that such analysis yields an estimate of the velocity of a mobile terminal, assuming that the movement of the terminal is the only (or at least the dominant) cause for temporal variation in the channel. The analysis presented in this paper is useful for the purposes of channel modeling, indoor localization as well as antenna and array design.