An Energy-Efficient Tunable CMOS UWB Pulse Generator

The design of an energy-efficient tunable ultra-wideband (UWB) pulse generator which complies with FCC regulations, without the need for shaping filter, is presented. The proposed pulse generator is based on carrier architecture. A new baseband UWB wavelet is used to modulate digital input data, ensuring better spectral efficiency. By using digital implementation technique, the proposed UWB pulse generator can adjust both the pulse width and the pulse amplitude, allowing more flexibility for use with different UWB technique. The design was simulated by a standard 65-nm CMOS technology. Simulation results show that the consumed energy by pulse is 19.8pJ decreased proportionally as bandwidth spectrum is higher. This shows a very good agreement with the low-power, low-cost UWB systems. The tuning spectrum complies with 3.1–5 GHz regulations.