Underwater Acoustic Micromodem for Underwater Internet of Things

Underwater acoustic communication (UAC) networks are becoming a hot spot for research due to the growing demand for ocean development. Previous acoustic modems were mainly designed for the field of ocean engineering construction and scientific investigation, and consequently, with the characteristics of large size and high-power consumption, a low-cost, low-power consuming micromodem is proposed in this paper to satisfy the requirements of underwater Internet of Things (IoT). The STM32F767 processor is embedded in the micromodem as the core for fast digital signal processing. Furthermore, a convolutional code-block interleaving-frequency hopping-MFSK underwater communication scheme is also discussed to ensure the communication quality. Experimental results are shown to demonstrate our modem can realize the reliable UAC transmission of 200 similar to 300 bit/sat the distance of 500 m.

Automated summary

This paper presents a low-cost, low-power consuming micromodem for underwater Internet of Things (IoT) applications. The micromodem utilizes the STM32F767 processor for fast digital signal processing and employs a convolutional code-block interleaving-frequency hopping-MFSK communication scheme to ensure communication quality. Experimental results show that the micromodem can achieve reliable underwater acoustic communication transmission at 200 to 300 bits per second over a distance of 500 meters.