Application of Fluid Time Hopping Coding to Multiple Access in Ultra Wide Band Sensor Networks

Abstract

Time Hopping Impulse Radio commonly encodes data symbols by shifting the position of transmitted pulses over a time gap that is quantized within the inter pulse interval range. In this paper, we adopt a previously investigated coding scheme that considers real-valued codes, and as such introduces time hopping in a "fluid" way. We analyze the application of fluid time hopping to UWB sensor networks. For this purpose we consider a fluid time hopping implementation that is simplified to the maximum extent, in order for it to be appropriate for those networks that need a flexible and easily adjustable multiple access scheme. Fluid time hopping proves in fact to allow fast, detailed, and low-complexity spectrum management, as most suitable in self-organizing networks. © 2006 IEEE.