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Ultra-WideBand (UWB) has great potential for wireless communications in emerging applications such as sensor networks. This paper studies the following fundamental problems for UWB-based sensor networks: For a given network instance, what is the maximum data rate (network capacity) that can be received at the base-station (i.e., sink node)? What is the network capacity bound among arbitrary network instances? The authors show that these problems can be cast into a cross-layer formulation with joint consideration of routing, scheduling, power control, and rate assignment.
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