Time Synchronization for OFDM Systems Using the Symmetric Correlator-ELM Technique

Time synchronization at receivers has a substantial impact on system performance in multicarrier communication systems like orthogonal frequency division multiplexing (OFDM)-based systems. An extreme learning machine (ELM)-based synchronization technique is suggested to prevent multipath channel disruption and ensure time synchronization. In this study, the coarse feature of the synchronization metric is the symmetric correlator. Then, to lessen the impact of multipath channels, an ELM-based network is used. This technique does not require information from channel statistics, and labeling on the ELM network does not require channel length information. According to experimental findings, our strategy might greatly lower the error probability of time synchronization when compared to earlier approaches.