Soft acoustic modem development for shallow water environment

Santoso, Tri Budi; Widjiati, Endang; Wirawan, Wirawan; Hendrantoro, Gamantyo

doi:10.1109/ut.2013.6519834

Cited by 3 publications

(2 citation statements)

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“…Most of these studies analyze specific experimental data for statistical modeling of channel amplitudes and fading, providing references for channel prediction and channel tracking. Meanwhile, studies on delay spread have analyzed the average, maximum, and RMS delay spreads [17], which represent the expansion degree of a channel in the delay domain. Delay spread lasts several to hundreds of milliseconds in shallow-sea channels, extending to several or tens of seconds in deep-sea channels.…”

Section: Introductionmentioning

confidence: 99%

Analysis of High-Frequency Communication Channel Characteristics in a Typical Deep-Sea Incomplete Sound Channel

Li,

Jia,

Huang

et al. 2023

Electronics

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Deep-sea acoustic communication has attracted widespread attention in recent years. Research on deep-sea acoustic communication channel characteristics is essential for the development and system design of deep-sea acoustic communication technologies. However, the structural and spatiotemporal characteristics of deep-sea high-frequency acoustic communication channels (unlike those of shallow-water acoustic communication channels) are poorly understood. Based on a channel measurement experiment in a typical deep-sea incomplete sound channel environment in the South China Sea, this paper analyzes the structural and spatiotemporal characteristics of high-frequency underwater acoustic channels in the direct-arrival and shadow zones. The channel multipath vertical structure, amplitudes of different path clusters, root mean square (RMS) delay spread, and channel temporal coherence are investigated at different depths. The randomness of different path clusters is quantified as the coefficient of variation. The channels in the shadow zone are characterized by a complex multi-path structure, high RMS delay spread, and low temporal coherence. On the contrary, the channels of the direct-arrival zone show multi-path convergence, low RMS delay spread, and high temporal coherence. Understanding the dynamic changes in these parameters can guide the statistical modeling of channels and the design of communication algorithms in different zones in deep-sea high-frequency acoustic communication scenarios.

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Section: Introductionmentioning

confidence: 99%

Analysis of High-Frequency Communication Channel Characteristics in a Typical Deep-Sea Incomplete Sound Channel

Li,

Jia,

Huang

et al. 2023

Electronics

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“…In addition to the advantages of robustness to large multipath delay spreads, high spectral efficiencies, and the ability to exploit the multiuser and/or multipath diversity, it is also possible to deploy OFDM systems in underwater acoustic networks. Some underwater acoustic modems based on OFDM technology have been studied in papers [12][13][14][15][16][17][18][19][20]. And the main work of this paper is to achieve real-time implementation of OFDM underwater acoustic communication system on an OMAP-L138 platform, which supports dual-core communication.…”

Section: Introductionmentioning

confidence: 99%

Design and Implementation of OFDM Underwater Acoustic Communication Algorithm Based on OMAP-L138

Liu

Li³

et al. 2014

Proceedings of the International Conference on Underwater Networks %Systems - WUWNET '14

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In recent years, orthogonal frequency division multiplexing (OFDM) technology has been widely investigated for both point-to-point underwater acoustic communications and for networks. In this paper, we implement the OFDM underwater acoustic communication algorithm on an OMAP-L138 platform, which possesses characteristics of low-power, rich peripheral and dual-core cooperation. The real-time processing capacity and good expansibility of this system have been verified. An error-free communication result has been achieved in a quasi-stationary pool experiment.

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