Abstract: We address the problem of suppressing a narrow-band interference(NBI) in direct-sequence spread spectrum(DSSS) communications with the subband transform. The signal and NBI are transformed into the subband domain with orthogonal filter bands. A subband threshold method is proposed for the suppression of NBI. The simulation results show that the performance of suppressing NBI by the propoed method is not lower than that by methods available, adn the proposed method needs less time to process signals than other methods.

Key words: subband signal processing, narrow-band interference suppression, thresholding