Ultrawideband (UWB) communication systems offer an unprecedentedopportunityto impact the future communication world. The enormousavailable bandwidth, the wide scope of the data rate /rangetrade-off, as well as the potential for very low-costoperation leading topervasive usage, all present a uniqueopportunity for UWB systems to impactthe way people andintelligent machines communicate and interact withtheirenvironment. The aim of this book is to provide an overviewof the state of the art of UWBsystems from theory to applications.Due to the rapid progress of multidisciplinary UWB research, suchan overviewcan only be achieved by combining the areas ofexpertise of severalscientists in the field. More than 30 leadingUWB researchers and practitioners have contributed tothis bookcovering the major topics relevant to UWB. These topics includeUWBsignal processing, UWB channel measurement and modeling, higher-layerprotocol issues, spatial aspects of UWB signaling, UWBregulation andstandardization, implementation issues, and UWBapplications as well aspositioning. The book is targeted atadvanced academic researchers, wireless designers, and graduatestudents wishing to greatly enhance their knowledge of allaspectsof UWB system