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The Multiple Access Interference (MAI) in a Time-Hopping (TH) Ultra-WideBand (UWB) system is known to be non-Gaussian even when the system has a moderately large number of active users. Therefore, the Conventional Matched Filter (CMF) receiver, the optimal structure for Gaussian noise which maximizes the Signal-to-Noise Ratio (SNR) and minimizes the probability of detection error in the absence of non-Gaussian interference, is not necessarily optimal. The authors express and prove a stronger claim that even the outputs of the matched filters in the conventional UWB receiver cannot provide a sufficient decision statistic for detecting the information bits transmitted by the desired user. Further, a novel TH-UWB receiver is introduced which uses a similar methodology to the optimal Multi-User Detection (MUD) algorithm for detecting the information bits.
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