Clipping Noise Mitigation in Optical OFDM Using Decision-Directed Signal Reconstruction

In this paper, the performance of a new decision-directed signal reconstruction (DDSR) algorithm with optimal thresholds for use optical orthogonal frequency division multiplexing (OFDM) modulation is investigated. Clipping noise remains one main drawbacks in many practical OFDM transmission systems. It has been shown previous studies that time-domain based DDSR can be used to effectively reduce clipping noise. However, all existing works studying algorithm, decision threshold direct fixed and equal level at which transmitted clipped. it that, due influences unavoidable receiver, fixing not an solution severely limit advantages using algorithm. A detailed theoretical analysis performed investigate key factors influence choices thresholds. The presented simulation results are verify accuracy also show significantly improved by obtained