The increased popularity of array antennas for wireless communication, has inspired investigations of the spatio-temporal properties of the radio channel, among others the azimuthal shape of the scattering clusters. Based on a statistical analysis, we show that trying to estimate the shape of the scattering is an ill-posed problem and that the heavy-tailed Power Azimuth Spectra reported in the literature may be an artifact stemming only from the measurement procedure.
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