Abstract: This paper studies the cancellation methods of ICI in UWB-OFDM systems. The mechanism of ICI is analyzed. A novel method of ICI cancellation based on ICI matrix properties is then proposed. Simulation results based on IEEE UWB channel models CM1 and CM4 show that, with the proposed ICI cancellation method, complexity of calculation can effectively be reduced with better performance over different UWB indoor channel environments and normalized different frequency shifts.

Key words:

ultra-wideband OFDM (UWB-OFDM), inter-carrier interference (ICI), variant multipath channel, equalization