The strong multipath and long delay extensions can lead to large errors in the timing offset estimation and copyright frequency offset estimation of the Orthogonal Frequency Division Multiplexing (OFDM) underwater communication system. resulting in significant performance degradation. Therefore. this paper proposes a robust time-frequency synchronization method for OFDM systems. https://jpqevmk7go4zk.bloginwi.com/68599354/the-mobile-effect-on-screen-format-the-case-of-vertical-videos