Fast Fourier Transform Overlap Approach for Underwater Acoustic Positioning System

Chee Sheng Tan, Rosmiwati Mohd-Mokhtar, Mohd Rizal Arshad

Research output: Chapter in Book or Report/Conference proceedingConference Proceedingpeer-review

7 Citations (Scopus)

Abstract

Acoustic technology able to provide communication between the surface vessel to the underwater vehicle. It helps especially during underwater navigation, tracking, localization and target positioning. This paper proposes a positioning system by using Fast Fourier Transform (FFT) with overlap technique. The FFT overlap is used to estimate the location of underwater target. Digital signal processing (DSP) algorithms are utilized on this system for extracting the information of the signal. Time difference of arrival (TDOA) is computed by retrieving difference between max FFT overlap of 2 different receivers, and it is multiplied by a constant which varies with overlap percentage. The peak amplitude is determined by computing FFT with 100% overlap. The location of target is determined by using angle estimation technique. This approach is tested on shallow water to obtain the direction of target. Result shows significant performance from the proposed approach.

Original languageEnglish
Title of host publication2018 IEEE 8th International Conference on Underwater System Technology
Subtitle of host publicationTheory and Application, USYS 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538694053
DOIs
Publication statusPublished - Dec 2018
Externally publishedYes
Event8th IEEE International Conference on Underwater System Technology: Theory and Application, USYS 2018 - Wuhan, China
Duration: 1 Dec 20183 Dec 2018

Publication series

Name2018 IEEE 8th International Conference on Underwater System Technology: Theory and Application, USYS 2018

Conference

Conference8th IEEE International Conference on Underwater System Technology: Theory and Application, USYS 2018
Country/TerritoryChina
CityWuhan
Period1/12/183/12/18

Keywords

  • Digital Signal Processing (DSP)
  • Fast Fourier Transform (FFT)
  • overlap technique
  • Positioning system
  • Time Difference of Arrival (TDOA)

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