Abstract

A novel timing offset estimation method for direct-detection (DD) optical orthogonal frequency division multiplexing (OOFDM) systems are proposed. The performance of the proposed method is evaluated in terms of mean and mean-square error (MSE) in one experimental system with 4Gbits/s DD-OOFDM signal transmission over 100-km standard single mode fiber (SMF). The experimental results show that the proposed method has smaller MSE than the other methods and achieves higher timing estimation accuracy in DD-OOFDM transmission system.

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