Ultra wideband (UWB) is a very promising communications technology under active research, development, regulation, and standardization efforts, with applications in computer and communications, consumer, radar, automotive, and cable communications. Impulse radio (IR) is an UWB modulation that uses waveforms that consist of trains of time-shifted sub nanosecond pulses. Data is transmitted using pulse position modulation at a rate of many pulses per symbol. Multiple access capability is achieved using spread spectrum time hopping. The IR-UWB promises to be a viable technique to build...