Robust focusing in time-reversal mirror with a virtual source array

2014 ◽  
Vol 136 (4) ◽  
pp. 2148-2148
Author(s):  
Gi Hoon Byun ◽  
Jea Soo Kim
Keyword(s):  
Time Reversal ◽  
Virtual Source ◽  
Time Reversal Mirror ◽  
Source Array

Spatial resolution of time-reversal processing with a virtual source array

2017 ◽  
Vol 142 (4) ◽  
pp. 2731-2731
Author(s):  
Donghyeon Kim ◽  
Gihoon Byun ◽  
Jea Soo Kim
Keyword(s):  
Spatial Resolution ◽  
Time Reversal ◽  
Virtual Source ◽  
Source Array

Multiple time-reversal focusing with a virtual source array

2018 ◽  
Vol 143 (3) ◽  
pp. 1789-1789
Author(s):  
Gihoon Byun ◽  
H. C. Song ◽  
J. S. Kim
Keyword(s):  
Time Reversal ◽  
Multiple Time ◽  
Virtual Source ◽  
Source Array

scholarly journals Virtual Source Array-Based Multiple Time-Reversal Focusing

2018 ◽  
Vol 8 (1) ◽  
pp. 99 ◽  
Author(s):  
Gihoon Byun ◽  
Heechun Song ◽  
Jeasoo Kim
Keyword(s):  
Time Reversal ◽  
Multiple Time ◽  
Virtual Source ◽  
Source Array

scholarly journals M-ary nonlinear sine chirp spread spectrum for underwater acoustic communication based on virtual time-reversal mirror method

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Songzuo Liu ◽  
Habib Hussain Zuberi ◽  
Yi Lou ◽  
Muhmmad Bilal Farooq ◽  
Shahabuddin Shaikh ◽  
...  
Keyword(s):  
Acoustic Communication ◽  
Time Reversal ◽  
Spread Spectrum ◽  
Underwater Acoustic Communication ◽  
Half Cycle ◽  
Spreading Factor ◽  
Underwater Acoustic ◽  
Virtual Time ◽  
Chirp Spread Spectrum ◽  
Time Reversal Mirror

AbstractLinear chirp spread spectrum technique is widely used in underwater acoustic communication because of their resilience to high multipath and Doppler shift. Linear frequency modulated signal requires a high spreading factor to nearly reach orthogonality between two pairs of signals. On the other hand, nonlinear chirp spread spectrum signals can provide orthogonality at a low spreading factor. As a result, it improves spectral efficiency and is more insensitive to Doppler spread than the linear counterpart. To achieve a higher data rate, we propose two variants (half cycle sine and full cycle sine) of the M-ary nonlinear sine chirp spread spectrum technique based on virtual time-reversal mirror (VTRM). The proposed scheme uses different frequency bands to transmit chirp, and VTRM is used to improve the bit error rate due to high multipath. Its superior Doppler sensitivity makes it suitable for underwater acoustic communication. Furthermore, the proposed method uses a simple, low-power bank of matched filters; thus, it reduces the overall system complexity. Simulations are performed in different underwater acoustic channels to verify the robustness of the proposed scheme.

Demonstration of a high-frequency acoustic barrier with a time-reversal mirror

2003 ◽  
Vol 28 (2) ◽  
pp. 246-249 ◽  
Author(s):  
H. Song ◽  
W.A. Kuperman ◽  
W.S. Hodgkiss ◽  
T. Akal ◽  
P. Guerrini
Keyword(s):  
Time Reversal ◽  
High Frequency ◽  
Time Reversal Mirror

Environmentally adaptive reverberation nulling using a time reversal mirror

2004 ◽  
Vol 116 (2) ◽  
pp. 762-768 ◽  
Author(s):  
H. C. Song ◽  
S. Kim ◽  
W. S. Hodgkiss ◽  
W. A. Kuperman
Keyword(s):  
Time Reversal ◽  
Time Reversal Mirror
Sign in / Sign up

Export Citation Format

Share Document