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Wireless LAN radio interfaces based on the IEEE 802.11a standard have lately found widespread use in many wireless applications. A key reason for this was that although the predecessor, IEEE 802.11b/g, had a poor channelization scheme, which resulted in strangling adjacent channel interference (ACI), 802.11a was widely believed to be ACI-free due to a better channelization combined with OFDM transmission...
We present our initial work on the design and of an opportunistic forwarding scheme for a wireless network. The main focus in our work is to take advantage of the interplay of the lower layer parameters and thus decide the design aspects of the forwarding decisions for an adaptive probabilistic opportunistic forwarding scheme. We have already shown that our opportunistic scheme can outperform single...
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,...
In this work we utilize the model for calculation of the interference power by partially overlapping channels and combine it with the signal to interference plus noise (SINK) criterion for signal capture to quantify the effect of adjacent channel interference (ACI) in 802.11a. We validate the results from our theoretical model by applying it on an in-lab testbed, in which we use signal splitters/combiners...
In this paper we consider the signal to interference plus noise ratio (SINR) criterion for connectivity, as a basis for a wireless ad hoc network and present a detailed study for the power performance of such a network. For this, we examine how typical wireless network parameters such as, network density and environment variables such as the path loss exponent can affect the power assigned to the...
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