asurements with different antenna problems. Experimental investigation using PROPSound array configurations are investigated and compared to illustrated this merit in mobile radio environments. each other. Measurements of one linear antenna array that Report [HaTa03b] presents a MIMO sounding system is perpendicular to the LoS and measurements of another dedicated to short range wireless communication. Using one that is parallel to the LoS are combined to virtual the system, a double directional measurement campaign CHAPTER 4.7 Propagation modelling and channel characterisation 18.14 Azimuth (°) Azimuth (°) Relative delay (ns) Figure 4.7-28 Experimental data obtained with the ISIS algorithm. in an indoor NLoS environment was performed, where a capacity-based analysis of directional MIMO channel the channel was estimated in a deterministic way with the measurements is presented. It is not only suitable for use above-mentioned ISIS algorithm. Estimation of polar- with a circular array, but it also enhances the processing isation characteristics for identical paths was proposed. speed without sacrificing the accuracy and the resolution. An approach leading to lower complexity and faster A comparison of directly measured MIMO channels and convergence of the SAGE algorithm is derived in MIMO channels generated from the multipath parame- [RiOK04]. The proposed method employs the Von ters, extracted using the HS-SAGE algorithm, is de- Mises distribution model defined in the angular domain. scribed to prove the previously mentioned statements. This models the directional data observed in channel In [ThLR04], an ameliorated version of this frequency measurement campaigns using only few parameters. The domain SAGE algorithm is implemented. Instead of the mixture model allows for representation of scenarios normal serial interference cancellation, the parallel in- where multiple scatterer clusters are present, and also for terference cancellation is suggested. The theory is representation of each cluster as a finite mixture