Narrowband interference suppression with symbol interleaving for UWB communication systems

In this paper, we propose a new method for mitigating narrowband interference in Ultra-WideBand (UWB) communication systems based on Orthogonal Frequency Division Multiplexing (OFDM). Spreading data symbols to some subcarriers, the interference is effectively mitigated. However, the range to be spread for the interference is limited in conventional methods. In the proposed method, we widen more the range of the interference spread by applying symbol interleaving and deinterleaving techniques. We can obtain better Bit Error Rate (BER) performance with the proposed method. Combining the proposed method with spectral shaping, a further improved BER performance is obtained.