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In this paper, the authors study the effect of channel uncertainty on the performance of pre-equalized pre-rake UWB systems. They consider a bounded uncertainty model and propose a pre-rake design that enables the system to satisfy the required performance in absence of ideal channel state information. Furthermore, they integrate spectral mask constraints into the proposed robust design and investigate the performance of the resulting robust pre-equalized pre-rake UWB system. Their numerical results show the efficacy of the proposed robust design in retaining the required quality of service also in the presence of channel estimation errors while satisfying the spectral mask constraints.
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