On the modulation options for UWB systems
MILCOM'03 Proceedings of the 2003 IEEE conference on Military communications - Volume II
Channel models for ultrawideband personal area networks
IEEE Wireless Communications
The ultra-wide bandwidth indoor channel: from statistical model to simulations
IEEE Journal on Selected Areas in Communications
The effects of timing jitter and tracking on the performance of impulse radio
IEEE Journal on Selected Areas in Communications
Performance of ultra-wideband communications in the presence of interference
IEEE Journal on Selected Areas in Communications
Impulse response modeling of indoor radio propagation channels
IEEE Journal on Selected Areas in Communications
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In this paper, we present an analysis of the BER performance of an ultra-wideband (UWB) system with pulse position modulation (PPM) for data modulation and direct sequence (DS) spreading for multiple access over indoor lognormal fading channels. A rake receiver is used to combine a subset of the resolvable multipath components using the maximal ratio combining technique. Inter-path and multiple-access interferences are modeled and incorporated into the bit-error-rate expressions. The analytical and simulation results allow one to quantify many critical aspects of a DS-PPM UWB system such as the gain of the optimally spaced signaling scheme over the orthogonal signaling scheme, the potential error floor given a specific channel multipath delay spread and the number of interfering users, tolerance of the system to timing jitter, and impact of user codes.