A serial IFFT precoding scheme to mitigate the periodic noise in OFDM system

Abstract

In this letter, we propose a serial IFFT precoding method to mitigate the periodic noise in orthogonal frequency division multiplexing (OFDM) system. The principle of the method is given. And the feasibility is proved theoretically. In addition, in a single light emitting diode (LED) based visible light communication (VLC) OFDM experimental system with periodic noise, a comparison between the system performances of the two schemes with and without the method is made. The experiment results show that the proposed method can be used to improve the system performance effectively.Index Terms-Orthogonal frequency division multiplexing (OFDM), digital signal processing, periodic noise, serial IFFT precoding