Comparison of Coded Modulation for Short Messages over High North Underwater Acoustic Channels
Article No.: 1, Pages 1 - 8
Abstract
As the Arctic Ocean becomes increasingly accessible due to the continuous sea-ice retreat during the last decades, UnderWater Acoustic (UWA) communications will play a pivotal role in future underwater Arctic exploration/exploitation activities that will inevitably emerge. In this paper, we aim to improve the reliability of short packet transmission typically needed for low-latency low-packet-loss communications. In particular, we compare the Packet Error Rates (PERs) of convolutional, turbo, Low-Density Parity-Check (LDPC) and polar codes. These four codes are implemented in the physical layer of a software modem, which uses single-carrier, Binary Phase Shift Keying (BPSK) modulation achieving 360 bits/s over the 3830-6170 Hz band. The modem transmitted 128-, 256-, 384-bit long packets over various UWA links north-west off the Svalbard Islands in June 2021. The packets were recorded in a linear hydrophone array and our offline analysis shows that there is an enormous reduction in the PER for all codes as the number of the used hydrophones increases from one to four. In addition, our results confirm the superiority of the polar code for all packet lengths and number of hydrophones.
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Published In
November 2022
190 pages
ISBN:9781450399524
DOI:10.1145/3567600
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Published: 29 December 2022
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WUWNet'22
WUWNet'22: The 16th International Conference on Underwater Networks & Systems
November 14 - 16, 2022
MA, Boston, USA
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Overall Acceptance Rate 84 of 180 submissions, 47%
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