Experimental Investigation of a Digital Data Transmission Module in Shallow Water Environment

Kolev, Stoyan; Nenova, Bistra; Ivanov, Ivan

doi:10.7546/engsci.lvi.19.02.03

Cited by 1 publication

(1 citation statement)

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“…Acoustic waves play a crucial role in the long-distance propagation of physical fields within the ocean, making the study of marine acoustic waves an essential avenue for understanding the complexities of the marine environment [1] . As ultrasonic waves propagate through a medium, their amplitude experiences exponential attenuation over distance [2] [3] .…”

Section: Introductionmentioning

confidence: 99%

Design and FPGA implementation of digital AGC in sonar receivers

Ma,

Du,

Liu

et al. 2024

Fourth International Conference on Sensors and Information Technology (ICSI 2024)

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In addressing the issue of gradually attenuating amplitude of underwater acoustic signals received by hydrophones, this paper presents a feedforward digital automatic gain control (AGC) system based on a table lookup method. This approach reduces significant computational load associated with logarithmic operations, multiplication, and floating-point arithmetic.The system was simulated using MATLAB software, and the results indicate that, compared to the commonly used binary search-based digital AGC systems, the feedforward digital AGC system based on the table lookup method exhibits faster control speed, smoother output signals, and a noticeable reduction in signal transients. Finally, a comparative validation of the two algorithms was conducted on Field Programmable Gate Array (FPGA), confirming the applicability and outstanding performance of the feedforward digital AGC system based on the table lookup method in practical engineering applications.

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Section: Introductionmentioning

confidence: 99%