Open AccessImpulse Response Shortening in TDOA Algorithm for Underwater Acoustic Localization
Author(s) -
Shingo Yoshizawa
Publication year - 2021
Publication title -
international journal of circuits, systems and signal processing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.156
H-Index - 13
ISSN - 1998-4464
DOI - 10.46300/9106.2021.15.175
Subject(s) - multilateration , impulse response , impulse (physics) , acoustics , multipath propagation , underwater , multipath interference , interference (communication) , computer science , algorithm , physics , geology , mathematics , telecommunications , mathematical analysis , channel (broadcasting) , oceanography , quantum mechanics , node (physics)
This paper presents a new idea of impulse response shortening in time difference of arrival (TDOA) measurement algorithm for underwater acoustic localization. Due to strong multipath interference caused by acoustic wave reflection, the pseudo-peaks occur when calculating a correlation function. Their pseudo-peaks disturbs the detection of a correct time position and leads to large TDOA measurement errors. In our previous paper, we presented the impulse response based GCC-PHAT (IR-GCC-PHAT), which computes a time difference by taking a cross-correlation between two impulse responses. As the further improvement, we study the effects of impulse response shortening that removes the pseudo-peaks. The effectiveness of impulse response shortening is explained by observing acoustic wave paths on an acoustic propagation simulator and verified by the simulation results