Spreading every transmitted bit over each sub-band and interleaving the spread signals over all of the sub-bands would provide the robustness to narrow-band interference in the ultra-wide band （UWB） system based on orthogonal frequency-division multiplexing （OFDM）. Simulation results show that the system has evident robustness against narrow-band interference and would improve the... https://wholelatteslovers.shop/product-category/electric-kettles/