Abstract
A broadband deterministic underwater acoustic channel model that integrates a finite-difference time-domain (FDTD) scheme with normal mode theory has been proposed. The former allows the computation of Green's function in the vertical direction across a broad bandwidth in a single time-domain computation without having to repeat at every frequency of interest, while the latter guarantees an accurate calculation of transmission loss in the horizontal direction. To this end, a systematic algorithm with low numerical complexity was developed. Its accuracy was maintained regardless of the bandwidth, frequencies, and size of the channel. The accuracy and the computational efficiency of the proposed algorithm are verified through comparisons with frequencydomain normal mode solutions at low frequencies and ray solutions at high frequencies, for various propagation scenarios.
| Original language | English |
|---|---|
| Pages (from-to) | 758-766 |
| Number of pages | 9 |
| Journal | Acta Acustica united with Acustica |
| Volume | 103 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2017 Sep 1 |
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All Science Journal Classification (ASJC) codes
- Acoustics and Ultrasonics
- Music
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A finite-difference time-domain normal mode method for broadband transmission loss predictions. / Kim, Yongjune; Koh, Il Suek; Lee, Yongshik.
In: Acta Acustica united with Acustica, Vol. 103, No. 5, 01.09.2017, p. 758-766.Research output: Contribution to journal › Article
TY - JOUR
T1 - A finite-difference time-domain normal mode method for broadband transmission loss predictions
AU - Kim, Yongjune
AU - Koh, Il Suek
AU - Lee, Yongshik
PY - 2017/9/1
Y1 - 2017/9/1
N2 - A broadband deterministic underwater acoustic channel model that integrates a finite-difference time-domain (FDTD) scheme with normal mode theory has been proposed. The former allows the computation of Green's function in the vertical direction across a broad bandwidth in a single time-domain computation without having to repeat at every frequency of interest, while the latter guarantees an accurate calculation of transmission loss in the horizontal direction. To this end, a systematic algorithm with low numerical complexity was developed. Its accuracy was maintained regardless of the bandwidth, frequencies, and size of the channel. The accuracy and the computational efficiency of the proposed algorithm are verified through comparisons with frequencydomain normal mode solutions at low frequencies and ray solutions at high frequencies, for various propagation scenarios.
AB - A broadband deterministic underwater acoustic channel model that integrates a finite-difference time-domain (FDTD) scheme with normal mode theory has been proposed. The former allows the computation of Green's function in the vertical direction across a broad bandwidth in a single time-domain computation without having to repeat at every frequency of interest, while the latter guarantees an accurate calculation of transmission loss in the horizontal direction. To this end, a systematic algorithm with low numerical complexity was developed. Its accuracy was maintained regardless of the bandwidth, frequencies, and size of the channel. The accuracy and the computational efficiency of the proposed algorithm are verified through comparisons with frequencydomain normal mode solutions at low frequencies and ray solutions at high frequencies, for various propagation scenarios.
UR - http://www.scopus.com/inward/record.url?scp=85030530737&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85030530737&partnerID=8YFLogxK
U2 - 10.3813/AAA.919104
DO - 10.3813/AAA.919104
M3 - Article
AN - SCOPUS:85030530737
VL - 103
SP - 758
EP - 766
JO - Acta Acustica united with Acustica
JF - Acta Acustica united with Acustica
SN - 1436-7947
IS - 5
ER -