Performance of a MIMO-OFDM-Based Opto-Acoustic Modem for High Data Rate Underwater Wireless Communication (UWC) System

Abstract

This paper fundamentally bases on the arrangement of MIMO-OFDM-based opto-acoustic modem using MATLAB-Simulink to additionally foster the data speed of an optical-acoustic correspondence in underwater wireless communication (UWC) system. Orthogonal frequency-division multiplexing (OFDM) and multiple input multiple output (MIMO) advancement for the most part used in far-off associations to further develop the data rates, protection from multipath blurring, and an augmentation in the channel’s spatial multiplexing and spatial diversity gain, etc. The OFDM design segregates the available bandwidth information into a number of overlying sub-channels. This multipath spread on the channel’s removes the inter symbol interference (ISI), and hence, the available bandwidth limit can be improved. Therefore, the OFDM methodology was directed towards to reduce the ideal subcarriers in the channel conveyed as the bit error ratio or rate (BER) or (Eb/No). Using the MATLAB-Simulink tool, the opto-acoustic modem was designed for the transmission and reception of optical and acoustic (EM) signals, respectively. From the simulation results, it is clear that the proposed method was very accurate and efficient. The BER of acoustic (EM) and optical signals were calculated successfully. Thus, by combining the MIMO and OFDM strategy in single opto-acoustic modem will grows the spectral efficiency, gain, and bandwidth of the channel and furthermore to work on the exhibition of submerged remote correspondence framework with single opto-acoustic modem through optical and acoustic (EM) signals. Therefore, the simulation results showed that, there is an improvement in the performance of an opto-acoustic modem that is, reduction in BER.