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A simulation technique has been developed to study the performance of nuclide identifying gamma detector units operating under a variety of different conditions. The studies are related to nuclide identification based on a template matching algorithm which has been well established, in particular, for the analysis of low statistics measurements. Results are presented for hand-held devices equipped...
Existing communications from ships via satellites are expensive. We are motivated to extend the cheaper terrestrial communication coverage to sea via multi-hop networking. Maritime environment presents new challenges because sea surface moves randomly resulting in wave occlusion that breaks communication links. This paper models the maritime communication link after considering the wave occlusion...
The inherent near-far effect in wireless networks causes nodes that are further away from the receiver to suffer from throughput degradation, as packets from nodes that are nearer are typically received with greater signal strengths. This unfair situation is traditionally overcome by power control. However, when power control is not feasible, for example in tiny sensor nodes with power-limited batteries,...
We design a cooperative retransmission scheme in the MAC layer which utilizes the UWB unique properties such as fine ranging and immunity to small scale fading in order to exploit the multiuser diversity in UWB networks. We analyze the optimal cooperation strategy to maximize the system throughput in proactive and reactive settings. We also perform simulations to show that the proposed UWB-based coperative...
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