1) RF Front-End Considerations for SDR Ultra-Wideband Communications Systems
By Stéphane Paquelet , Christophe Moy and Louis-Marie Aubert

2) A SDR Ultra-Wideband Impulse Communication System for Low and High Data Rates
Christophe MOY - Ph.D, Stéphane PAQUELET, Alexis BISIAUX - Ph.D., Apostolos KOUNTOURIS - Ph.D.

3) A Summary of FCC Rules for Ultra Wideband Communications
By Gary Breed

4) Introduction to Ultra-Wideband Communications
By Faranak Nekoogar