Discrete Time Communications

Given the recent spectral allocation and the new definition of UWB adopted by the FCC, UWB is not considered a technology anymore, but available spectrum for unlicensed use. This means that any transmission signal that meets the FCC requirements for UWB spectrum can be considered UWB technology. This, of course, is not just restricted to impulse radios or high speed spread spectrum radios pioneered by companies so far, but to any technology that utilizes more than 500 MHz spectrum in the allowed spectral mask and with the current emission limit's restrictions.