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Models of the spatial distribution of the scatterers that surrounds a transmission path, i.e., spatial channel models, play a crucial role in predicting the performance of multiple-input multiple-output wireless communication systems. Most conventional approaches to characterizing spatial channels based on measured channel response data require either mechanically steerable directional antennas or...
In Wireless Local Area Networks (WLANs), the estimation of interference conditions at a receiving node and the determination of interference relations among different wireless nodes is a challenging problem. Interference relations provide the information of which wireless links do interfere if activated concurrently. This information is crucial for the determination of which wireless links are allowed...
In this paper the complete state of the art of UWB is presented, ranging from the theory of the wireless channel, measurements, channel modeling the use of UWB in multiple antenna systems. This work presents preliminary results of a measurement campaign accomplished in the Technical University of Cartagena. Measurements were performed from 2 GHz to 5 GHz using a Vector Network Analyzer (VNA), and...
Near-ground wireless channels are becoming increasingly important for a number of applications. In this paper we add to the body of work on this topic, by quantifying small-scale near-ground channel fading characteristics in indoor environments, at 5 GHz. Results for delay spreads, multipath component persistence, and amplitude fading are used to develop models for this channel. As expected, the near-ground...
Measurements of a wireless channel's spatial correlation guide the development of multi-antenna wireless systems that use spatial diversity. Representative spatial channel measurements are required to design these multi-antenna systems, but typical measurements of spatial correlation obtained by moving an antenna array through a wireless channel provide limited correlation data that cannot be generalized...
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