Joint Synchronization and Channel Estimation of ACO-OFDM Systems With Simplified Transceiver

To facilitate the development of asymmetrically clipped optical orthogonal frequency division multiplexing systems, a joint synchronization and channel estimation scheme is proposed. The preamble used in the scheme is based on zero correlation code pair and has impulse-like correlation relationship. This property can let the results of synchronization process be the coarsely estimated channel time response, thus simplifies channel frequency response generation. Also, a transceiver with low complexity is proposed. The proposed transceiver needs only half the amount of multiplications compared with conventional transceiver. Simulation results reveal that the proposed scheme achieves better performance both in synchronization and channel estimation than existing schemes.