“…Unlike [7][8][9], and following an approach similar to [12,13,[15][16][17][18], our pulse generator emits UWB signals in 3.1-5 GHz, instead of the full 3.1-10.6 GHz bandwidth, in order to avoid interference with wireless local area networks (WLANs) in 5-6 GHz. Again, like in [11,13,18,22], we rely on a safe DLL-based technique in order to generate precise pulse durations, different from the approach suggested in [8,9,19] of using gate delays, which are imprecise and subject to high variability (a DLL was also used in [19] but with a different purpose). However, our work differs from [11,18,22] in that we generate a fully differential signal by using a symmetrical architecture which eliminates the DC component, and from [11,19,22] by providing a sound theoretical study about the pulse synthesis.…”