Capacity of PPM Ultra-Wideband Communications over ISI Channels

In this paper we study the information theoretic capacity of Pulse Position Modulation (PPM) Ultra Wideband (UWB) communications for single user channels. The capacity is studied with a link impulse response with delay spread and Inter Pulse Interference (IPI). The bjective is to consider the effect of IPI on capacity and quantify the capacity with IPI. An expression for the signal-tonoise ratio is developed for UWB as a function of decay rate of the link impulse response. The information theoretic capacity of the UWB system is studied as a function of number of quantized PPM resolution intervals.

Keywords:

Position Modulation (PPM) , Rake receiver , Ultra-Wideband , Capacity , Inter Pulse Interference