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—This paper presents a novel stochastic channel model for multiple-input multiple-output (MIMO) wireless radio channels. In contrast to state-of-the-art stochastic MIMO channel models, the spatial correlation properties of the channel are not divided into separate contributions from transmitter and receiver. Instead, the joint correlation properties are(More)
—We measure the capacity of multiple-input multiple output radio systems in microcellular environments. We use a new data evaluation method that allows to evaluate the cumulative distribution function of the capacity from a single measurement. This method is based on an extraction of the parameters of the multipath components and, thereafter, a synthetic(More)
This paper provides an overview of the state-of-the-art radio propagation and channel models for wireless multiple-input multiple-output (MIMO) systems. We distinguish between physical models and analytical models and discuss popular examples from both model types. Physical models focus on the double-directional propagation mechanisms between the location(More)
—We present a statistical analysis of wideband three-dimensional channel measurements at base station locations in an urban environment. Plots of the received energy over azimuth, elevation , and delay planes suggest that the incident waves group to clusters in most measured transmitter positions. A super-resolution algorithm (Unitary ESPRIT) allows to(More)
Acknowledgements First of all, I want to thank the Elektrobit Corp., Finland. Their co-funding over a period of three years made this thesis possible. Especially, I want to acknowledge the continuous and strong support of their research team, Dr. cooperation was a true pleasure for me. I also want to express my gratitude to the Centre for Wireless(More)
— Recent findings suggest to split the impulse response of the radio channel into discrete paths and the " diffuse multipath " (DMP). This diffuse part can be described by an exponentially decaying power delay profile. This paper shows how to improve current radio channel models using the DMP concept. From MIMO channel measurements, we find that the DMP(More)
— Indoor MIMO measurements in a laboratory environment , covering both line-of-sight (LoS) and obstructed line-of-sight (OLoS), are reported. Comparison of data taken at 2.55 and 5.25 GHz reveal subtle differences in temporal and angular characteristics. Multipath appears in clusters, which can be attributed to specific scattering/reflection areas in the(More)
— Essential parameters of physical, propagation-based MIMO channel models are the fading statistics and the directional spread of multipath clusters. In this paper we determine these parameters in the azimuth-of-arrival/azimuth-of-departure (AoA/AoD) domain based on comprehensive indoor MIMO measurements at 5.2 GHz in a cluttered office environment using(More)
— We present a solution to the problem of identifying clusters from MIMO measurement data in a data window, with a minimum of user interaction. Conventionally, visual inspection has been used for the cluster identification. However this approach is impractical for a large amount of measurement data. Moreover, visual methods lack an accurate definition of a(More)