Ultrawideband (UWB) communication systems offer an opportunity that has never happened before to impact the future communication world. More than 30 leading UWB researchers and practitioners have contributed to this book covers major topics relevant to UWB. These topics include UWB signal processing, UWB channel measurements and modeling, higher-layer protocol issues, spatial aspects of UWB signaling, UWB regulation and standardization, implementation issues, and UWB applications as well as position.