Abstract:

In order to solve the problem of interference by narrow-band signals in the wideband OFDM system,a method based on the TDC technique is proposed for NBI rejection in the OFDM system.The optimal OFDM signals based on the estimated spectrum is designed to suppress the NBI in the TD.This method not only effectively reduces the impact caused by strong NBI,but also enables the SNR to be less susceptible to the effects of transform domain filtering.The simulation results in the AWGN channel show that this method based on the TDC technique can effectively suppress the NBI in the wideband OFDM system.

Key words: OFDM;TD;TDC;NBI rejection