Multiple access performance of ultra-wideband transmitted reference systems in multipath environments

The multiple access (MA) performance of an ultra-wideband differential transmitted reference (UWB DTR) system and an ultra-wideband transmitted reference (UWB TR) system in multipath environments is investigated through analysis. The Gaussian assumption of the multiple access interference is verified by simulation and used in the analysis. Numerical examples are also given in this paper according to the analytical results and the channel models proposed by IEEE P802.15 working group. Results show that the MA performance of these two systems depends on the multipath situation, and the MA capacity of an UWB DTR system is twice that of an UWB TR system. A transmission strategy for these two systems is also proposed to improve the MA performance.