Throughput Assessment for DS and TH UWB Systems in Multipath Environment

We assess the performances of multi-user UWB systems which employ direct-sequence and time-hopping access schemes, for transmissions of several Mbit/s in an operating environment characterized by dense multipath. The link outage probability and average aggregate network throughput are estimated, assuming a network topology based on a clustered structure, formed by a multitude of uncoordinated coexisting piconets. We investigate the impact on the system performances of some critical implementation choices, such as the UWB signal model, the traffic characteristics and the Rake receiver scheme, by employing a semi-analytical estimate procedure, which also accounts of the large and small scale fading phenomena for the UWB indoor propagation channel.