Abstract

Recently, single-carrier transmission with frequency domain equalization has attracted much attention because of having low computational complexity and being able to obtain an excellent performance even in strong frequency selective channels. We evaluate the performance of direct sequence-ultra wideband (DS-UWB) with frequency domain channel estimation (FDCE) and equalization (FDE) in the UWB multipath channel and compare it to that of conventional DS-UWB with time domain channel estimation (TDCE) and a RAKE receiver. In particular, we focus on the computational complexity of the frequency domain process (FDP) that uses FDCE and FDE and compare it to that of the time domain process (TDP) that uses TDCE and RAKE. Our simulation results show that DS-UWB with FDP has significantly the less computational complexity and achieves a better performance than DS-UWB with TDP.

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