Design of Underwater Communication Modulation and Demodulation Technology for High-Performance Underwater Acoustic Modem

In this paper, we analyzed the main characteristics of the underwater acoustic channel to design a high-performance underwater acoustic modem. We utilized modulation/demodulation techniques suitable for high-speed communication to achieve a transmission capacity of tens of kbps for the parameters of the high-performance underwater communication physical layer. By applying OFDM, we designed an OFDM-based underwater communication modulation and demodulation using modulation schemes higher than QPSK with a wide bandwidth. The designed model was simulated and verified using MATLAB.