Ultra-wideband (UWB) has emerged as an attractive solution for novel high data rate and short
range wireless communication systems. The U.S. Federal Communications Commission (FCC)
defines UWB as any signal that occupies more than 500 MHz bandwidth or possesses a fractional
bandwidth greater than 20%. In this context, the FCC has also approved the unlicensed use of a
spectral band from 3.1 to 10.6 GHz with a transmitted power spectral density (PSD) less than
41.3 dBm/MHz for indoor wireless communications. The interest in this technology is due to its
advantages in terms of low power usage, high data rates, precise positioning capabilities, extremely
low interference and particularly the ability to spread a signal over a wide bandwidth, ensuring a
low power density and thus being capable of coexisting with other wireless technologies [5].