Method of Time reversal filter bank multicarrier underwater acoustic communication

Aiming at the problem of low efficiency and high complexity of traditional equalization methods in underwater acoustic Filter Bank MultiCarrier (FBMC) system,an equalization algorithm based on single sensor passive and virtual time reversal mirror is proposed.The algorithm can reduce the Inter Symbol Interference (ISI) caused by the underwater acoustic channel by using the time focusing principle.Besides,it can achieve channel equalization without inserting the pilot in the FBMC symbol.As a result,the ISI can be reduced and the communication rate can be improved.We prove the validity of two equalization methods of single sensor Passive Time Reversal Mirror (PTRM) and Virtual Time Reversal Mirror (VTRM) by simulation and field experiment.The results show that the passive and virtual time reversal equalization method based on single sensor can effectively reduce the ISI and improve the reliability of the system.