[1]Harbin Engineering University, Harbin 150001, China;
[1]Harbin Engineering University, Harbin 150001, China;
[1]Harbin Engineering University, Harbin 150001, China;
[1]Harbin Engineering University, Harbin 150001, China;
OFDM-CDMA; Time reversal mirror; Multi-users; Underwater acoustic communication;