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In this paper, multi-user communication scenario for Ultra Wide Band (UWB) system has been considered. For effective use of spectrum in multi-user communication, a new variant of CDMA scheme known as Interleave-Division Multiple-Access (IDMA) scheme has been proposed. IDMA inherits many advantages from CDMA such as diversity against fading, mitigation of the interference among users efficiently. This paper investigates the effectiveness of IDMA scheme for multi-user detection in UWB indoor environment subjected to non-Gaussian noise. Two different non-Gaussian noise models, Laplacian and Gaussian Mixture Model (GMM), have been studied which are more realistic models for UWB systems. Simulations are performed using UWB channel model proposed by IEEE 802.15.3a working group.
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