This paper demonstrates the effectiveness of multiuser detection for an ultra-wide-band (UWB) pulse based direct sequence spread spectrum system using code division multiple access. Extensive simulations were run using channel soundings of 2-8 GHz band collected in a residential setting and characterized by a high level of multipath fragmentation. The paper shows that the adaptive minimum mean square error (MMSE) multiuser detection (MUD) receivers are able to gather multipath energy and reject intersymbol and interchip interference for these channels to a much greater extent than RAKE receivers with 4 and 8 arms.
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