Through the analysis of inter-code interference and concentric interference in Time Inverter (TRM) MIMO system, the application potential of TRM technology in underwater acoustic MIMO system is discussed. A common TRM MIMO system interference composition expression is obtained, and the interference of TRM MIMO system is calculated for the typical shallow seawater channel, and the relationship between the interference suppression ability of TRM technology to MIMO system itself and the parameters such as the formation structure, channel structure and transmission signal form is studied. Comparing the calculation results of the letter-stem ratio with the results of the signal-stem ratio in the outdoor wireless channel TRM MIMO, and with more abundant multi-paths in the underwater acoustic channels with a smaller attenuation coefficient, TRM can obtain better spatial focus, so that the trunk in the underwater acoustic TRMMIMO channel is larger than in the outdoor wireless channels. It can be concluded that the inhibition ability of TRM technology to interference with underwater acoustic MIMO system mainly depends on the richness of multi-path, the number of condones of receiving, burst spacing and time reversal.

OFDM; bidirectional multi-relay; power distribution; subcarrier pairing.