This paper describes a signal processing technique which allows a reduction in the complexity of a transceiver for a 3.1-10.6 GHz ultra-wideband radio. The proposed system transmits passband pulses using a pulser and antenna, and the receiver front-end downconverts the signal frequency by subsampling, thus requiring substantially less hardware than a traditional narrowband approach. By exploring the properties of analytic signals, the system allows hardware reduction and a time resolution finer than the sampling period, which is useful for locationing or ranging applications.