PERFORMANCE COMPARISON BETWEEN MB-OFDM AND DS-UWB IN INTERFERED MULTIPATH CHANNELS

摘要

Performances of multiband orthogonal frequency division multiplexing (MB-OFDM) and direct sequence based ultra wideband (DS-UWB) systems are studied in interfered multipath channel. The radio channel is based on the modified Saleh-Valenzuela model. The studies related to the comparison between MB-OFDM and DS-UWB within interference seems to be unsubstantial in the literature. Therefore, it is crucial to fill this gap. We focus more on coded MB-OFDM systems, whereas uncoded DS-UWB is applied as a point of comparison. Simulation assumptions are the same spectral allocation and data rate between these two systems. No interference mitigation techniques are applied. Simulation results showed that MB-OFDM system is more sensitive to interference than the corresponding DS-UWB. Uncoded DS-UWB, which is therefore also simpler approach, can give similar performance than coded MB-OFDM in several interfered cases.