Non-Orthogonal Multicarrier Modulation for UWB Systems

In this paper, we propose a non-orthogonal multi- carrier system for UWB systems to overcome the problem of intercarrier interference (ICI). The proposed scheme applies a window filtering operation around a group of consecutive subcarriers spanning 500 MHz. The filter´s samples are used instead of cyclic prefix of conventional OFDM systems. Thus, the proposed scheme is more efficient spectrum-wise. Furthermore, the filtering operation reduces out-of-band sidelobe levels, resulting in better robustness and relaxing the required frequency synchronization accuracy. Compared to other multicarrier approaches like OFDM or filter bank multicarrier, the proposal does not suffer from high overhead. Thus, the proposal is suitable for V2X UWB-applications requiring short burst transmissions and fast TDD switching with relax synchronization block and consequently reduced cost.