1 Introduction. 2 UWB Signals and Systems. 2.1 A brief history of UWB Systems and their applications. 2.2 Spectrum and power of UWB signals. 2.3 Antennas for UWB signals. References. 3 UWB RADAR Receiver Architecture. 3.1 UWB RADAR Systems. 3.2 UWB Radar Equation. 3.3 UWB receiver architecture. 3.4 Receiver Specifications. References. 4 Digitally Programmable Delay...