Analysis of the SAGE DOA parameter extraction sensitivity with 1.8 GHz indoor measurements

A channel measurement campaign, done with a system from the University of Kassel, is reported. With very high bandwidth (600 MHz), a large room has been measured at 1.8 GHz with a moving antenna, forming a synthetic aperture. The transformation from the transfer function in the frequency-domain to the time-domain received signal, with the training sequence included, is explained. On these data, the space alternating generalised expectation maximisation (SAGE) algorithm is applied to extract with high resolution the direction of arrival (DOA) parameters, in this case the time delay, the azimuth angle and the complex amplitude for every significant path. The extraction results are evaluated and visually interpreted.