Underwater Data Transmission Using Frequency Shift Keying (FSK) Modulation with Bit Rate of 2400 bps

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Slamet Indriyanto
Anggun Fitrian Isnawati
Jans Hendry
Ian Yosef Matheus Edward


Underwater acoustic communication is a technology that uses sound or acoustic waves and water as its propagation medium. This technology has been used in various fields, such as underwater wireless sensor networks, underwater monitoring system, and surveillance systems. An acoustic modem is required to facilitate communication between nodes. In this paper, an underwater acoustic modem using Frequency Shift Keying (FSK) modulation has been designed. This modulation is widely used because of its reliability and simple design. FSK modem was designed using M=2 level or known as Binary FSK (BFSK) with 40 kHz mark frequency and 43 kHz space frequency. This study tested data packets sending and its error rate against the distance variation. Testing for 70-bit data resulted in 1% error at 100 cm distance and 37% error at 170 cm distance. When compared with the previous testing at 1200 bps which resulted in 0% and 35% error, it can be seen that error at 1200 bps is better than at 2400 bps, but the data transmission was better at 2400 bps. Addition to the number of bits sent and distance has an influence on the error value, i.e. the greater the distance and the amount of data sent, the greater the error value.

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Author Biographies

Slamet Indriyanto, Institut Teknologi Telkom Purwokerto

Slamet Indriyanto was born in Brebes, Indonesia, in 1988. He received Master degree in Electrical Engineering from Institut Teknologi Bandung, Indonesia in 2018. He joined as a Lecturer in the Institut Teknologi Telkom Purwokerto since 2019. His research interest is in underwater communication, and internet of things.

Anggun Fitrian Isnawati, Institut Teknologi Telkom Purwokerto

Anggun Fitrian Isnawati was born in Cilacap, Indonesia, in 1978. She received a Doctoral degree in Telecommunication Engineering from Gadjah Mada University, Yogyakarta, Indonesia in 2018. She joined as a Lecturer in the Institut Teknologi Telkom Purwokerto since 2002. Her research interest is in wireless communication, signal processing, channel estimation, optical communication, game theory, and cognitive radio.

Jans Hendry, Institut Teknologi Telkom Purwokerto

Jans Hendry was born in Bangkinang, Indonesia, in 1986. He received a Master's degree in Electrical Engineering from Gadjah Mada University, Yogyakarta, Indonesia in 2013. His research interest is in telecommunication, signal processing, image processing, and control.

Ian Yosef Matheus Edward, Institut Teknologi Bandung

Ian Yosef Matheus Edward received a Doctoral degree in Electrical Engineering from Universitas Indonesia, Depok, Indonesia in 2007. His research interest is in telecommunication and signal processing.


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