Accurate identification of scatterers for improved microcell propagation modelling

This paper describes a procedure for combined time delay/angle of arrival (AOA) measurements, which are needed for the development of improved microcell propagation models. The procedure requires a spread-spectrum channel sounder equipped with a receive antenna which can be moved along a circle. Using angular superresolution algorithms such as UCA-MUSIC and UCA-ESPRIT, accurate azimuth/elevation AOA information of individual multipath contributions arriving within subsequent time delay intervals can be extracted from the measured data. Simulations indicate that good results can be obtained (RMS AOA errors smaller than one degree), except for the case of highly correlated ground-reflected signals at grazing incidence. Measurement results obtained in a simple multipath environment are presented