MIMO-OFDM For wireless communications underwater, IDMA is utilized to minimize fading. MIMO enables the simultaneous delivery of data from a number of antennas and its simultaneous reception by a number of antennas. This approach enhanced data rate while maintaining bandwidth and reduced fading. All other underwater multiple access methods are outperformed by IDMA. Low BER was proven using MIMO-OFDM and MIMOIDMA with varying user counts. To minimize burst errors and fade in underwater channels, we integrate MIMO-OFDM with IDMA. Wireless communication underwater deteriorates in a number of ways. MIMO-OFDM with IDMA and hydrophones enhance underwater communication. Acoustic waves, which transmit data at a slower pace than electromagnetic waves, are used for underwater communication. This research lessens fading at low data rates. In this investigation, random interleaving IDMA was applied. A tree-based interleaved might be included in future IDMA updates. User isolation and pattern creation are accomplished via tree-based interleaving.

Underwater Communication, IDMA (Interleavers Division Multiple Access) Scheme, MIMO (Multiple Input Multiple Output), Rake Receiver.