1. Introduction

In recent years, UWB technology has mostly focused on consumer electronics and wireless communications. Federal Communication Commission (FCC) issued a report in February 2002, allowing the commercial and unlicensed deployment of UWB applications in USA for both indoor and outdoor spectral mask. This wide frequency allocation initiated a lot of researches from both industry and academia [1]. UWB is used for short and medium range of radio communications and positioning applications.

The European regulatory body issue similar restrictions are shown in Figure 1. The key limitations for wireless communication using UWB are mentioned in [2–4].

UWB impulse radio system has several advantages over other conventional systems [5].


Figure 1. European regulatory body spectrum.
