1. History of Ultra WideBand (UWB) Radar and Communications and Radar: Part I, UWB Communications;Barrett;Microwave Journal,2001
2. Future research Directions in Ultrawideband (Impulse Radio) Communications;Freebersyser,2000
3. Step Recovery Diode Doubler;Hewlett Packard Application Note 989,1982
4. Proceedings of the 2002 IEEE Conference on Ultra Wideband Systems and Technologies,2002
5. Delay-hopped Transmitted-Reference RF Communications;Hoctor,2002