Node Estimation Approach of Underwater Communication Networks Using Cross-correlation for Direct and Multi-path Propagation

Sarker, Hasan; Oli-Uz-Zaman, Md.; Chowdhury, Imtiaz Hasan; Chowdhury, S. A. H.; Islam, Md. Rabiul

doi:10.1109/icrest.2019.8644336

Cited by 2 publications

(1 citation statement)

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“…While the SRP can be achieved through the probing technique, practical challenges in undersea acoustic communication such as finite bandwidth, multipath propagation delay, and Doppler shift require further examination. Previous studies have already explored the impacts of signal length [31]- [33], signal strength [34], multipath propagation delay [35]- [37], and dispersion coefficient [38].…”

Section: Introductionmentioning

confidence: 99%

Cross-correlation based approach for counting nodes of undersea communications network considering limited bandwidth

Rahman,

Giti,

Chowdhury

et al. 2024

Preprint

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The limited bandwidth (BW) of undersea communication presents a significant challenge to the node counting technique based on cross-correlation (CC), which traditionally use Gaussian signals with infinite BW. To address this, a band-limited Gaussian signal is employed for counting nodes, impacting the cross-correlation function (CCF) and the derived estimation parameters. To correlate the estimation parameters for finite and infinite BW scenarios, a scaling factor (SF) is determined for a specific BW by averaging their ratios across different node counts. Efficient estimation in a band-limited condition is feasible if the SF for that BW is known. Previous investigations have been limited to 5 kHz and 10 kHz BW. Given the typical undersea BW range of 1–15 kHz, it is important to establish a relationship between the SF and BW. This relationship, derived and validated through simulation in this study, allows for determining the SF and achieving accurate node count under any band-limited condition within the 1–15 kHz range.

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