Covert underwater communication based on combined encoding of diverse time-frequency characteristics of sperm whale clicks

Jiang, Jiajia; Li, Chunyue; Wang, Xianquan; Sun, Zhongbo; Fu, Xiao; Duan, Fajie

doi:10.1016/j.apacoust.2020.107660

Cited by 18 publications

(4 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, whistles have a relatively long communication range because of their long duration and variable bandwidth compared to clicks. Thus, the whistles have been mainly used in biomimetic UWA covert communication [8][9][10][11][12][13][14][15][16][17].…”

Section: Proposed Methods 21 Dolphin's Call Signalmentioning

confidence: 99%

“…In UWA covert communications, however, the narrow usable bandwidth limits the large spreading factors in DSSS, and a low transmitting power reduces the communication range [1][2][3][4][5][6][7]. To solve this problem, researchers have studied the biomimetic UWA covert communication method that mimics and transmits the sound of marine creatures to confuse the enemy [8][9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

WhistleGAN for Biomimetic Underwater Acoustic Covert Communication

Kim,

Seol,

Lee

et al. 2024

Electronics

View full text Add to dashboard Cite

This paper proposes a whistle-generative adversarial network (WhistleGAN) that generates whistles for biomimetic underwater covert acoustic communication. The proposed method generates new whistles to maintain covertness by avoiding the repetitive use of the same whistles. Since the human ear perceives octave frequency such that low-frequency resolution is relatively larger than that of low frequencies, the proposed WhistleGAN uses mel filter banks to keep the fidelity in mimicking while reducing the complexity. The mean opinion score test verified that the whistles generated by the proposed method and the recorded real whistles have a similar score of 4.3, and the computer simulations proved that the bit error rate performance of the proposed method is the same as that of the real whistle.

show abstract

Section: Proposed Methods 21 Dolphin's Call Signalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

WhistleGAN for Biomimetic Underwater Acoustic Covert Communication

Kim,

Seol,

Lee

et al. 2024

Electronics

View full text Add to dashboard Cite

show abstract

“…The HOWM signal for the l-th whistle is calculated by Eqs. (7) and (8). The mimicked signal (s (t)) in the m-th slot for the whole whistles is generated by combining L signals and is attained as…”

Section: B Hybrid-multiple Whistle Mimic Modulationmentioning

confidence: 99%

“…Even if enemies receive the biomimetic communication signals, the enemies consider the signals as the aquatic creature sounds [1]. Since the whales are worldwide distributed and their whistle sounds are reached to a long distance, the whale whistle based biomimetic covert communication methods have been researched [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Mimicking Multiple Whale Whistles-Based Underwater Covert Communication

et al. 2022

View full text Add to dashboard Cite

In underwater biomimetic covert communications, multiple whale whistles are mimicked for improving covertness. The conventional mimicking methods suffered from the trade-off between the mimicking performance and the bit error rate (BER). In this paper, we propose a continuous phase-multiple chirp modulation (CP-MCM) and a hybrid orthogonal whistle modulation (HOWM) to improve the BER and the mimicking performance of the biomimetic covert communication with the multiple whistles. The proposed CP-MCM utilizes chirp signals as the carriers of transmission symbols to mimic the frequency contour of the whistles accurately. The proposed HOWM utilizes the conventional OFDM in the overlapping whistle regions to avoid the interferences and the CP-MCM in the nonoverlapping regions to attain the large mimicking performance. Computer simulations and practical ocean experiments demonstrated that the proposed HOWM mimicked the multiple whistles with better BER performance than conventional methods.

show abstract

Bionic covert underwater communication focusing on the overlapping of whistles and clicks generated by different cetacean individuals

Jiajia

Wang

et al. 2021

Applied Acoustics

View full text Add to dashboard Cite

Covert underwater communication based on combined encoding of diverse time-frequency characteristics of sperm whale clicks

Cited by 18 publications

References 24 publications

WhistleGAN for Biomimetic Underwater Acoustic Covert Communication

WhistleGAN for Biomimetic Underwater Acoustic Covert Communication

Mimicking Multiple Whale Whistles-Based Underwater Covert Communication

Bionic covert underwater communication focusing on the overlapping of whistles and clicks generated by different cetacean individuals

Contact Info

Product

Resources

About