In this paper, we analyze the multiuser performance of a modified version of a newly proposed balanced transmittedreference (TR) system for ultra-wideband (UWB) communications. The proposed TR system is capable of properly eliminating the inter-pulse interference (IPI) between the reference and data pulses in multipath environments, with a low system complexity. We further investigate the effect of the inter-pulse distance on the multiuser capacity and demonstrate the trade-off between the

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... m's achievable information rate and the number of coexisting users. (ν) d does not have to be larger than the channel delay © 1-4244-0357-X/06/$20.00 2006 IEEE This full text paper was peer reviewed at the direction of IEEE Communications Society subject matter experts for publication in the IEEE GLOBECOM 2006 proceedings.