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We present an outdoors 802.11a testbed based on off-the-shelf components that we used for multi-radio node experimentation. This is the first such testbed, to our knowledge, equipped with directional antennas. With it we conducted a thorough and systematic set of measurements, in medium range outdoors links, to examine how the physical separation of the antennas, the output power of the interfaces,...
This paper investigates the effective gain of antennas in indoor channels. A metric called instantaneous effective gain is proposed, and a multiple-cluster 3D channel model is used to facilitate the proposed antenna effective gain. In the multiple-cluster channel model, Laplacian and double exponential distribution are utilized to model azimuth and elevation signal power distribution respectively,...
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