Full-duplex ultrasonic through-wall communication and power delivery system with frequency tracking
Abstract
A method and apparatus provide simultaneous bi-directional communications through a barrier using a pair of piezoelectric transducers. Outside-to-inside transmission of differentially encoded binary data is only sampled at the inside when a known repeated bit in a Barker sequence is transmitted in the other direction. Differentially encoded data is translated based on the absolute value of differences between each signal envelope sample and the previous signal envelope sample. Inside-to-outside data is transmitted by varying an electrical load on the inside transducer to vary the proportion of a continuous wave signal it reflects. The reflected portion of the continuous wave changes the electrical impedance of the outside transducer and this change is measured and interpreted as binary data. Two frequency selection algorithms select minimally sufficient and then optimal frequencies for power and data transmission by a frequency stepping process.
- Inventors:
- Issue Date:
- Research Org.:
- Rensselaer Polytechnic Inst., Troy, NY (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1531950
- Patent Number(s):
- 9455791
- Application Number:
- 14/385,947
- Assignee:
- Rensselaer Polytechnic Institute (Troy, NY)
- DOE Contract Number:
- KN6000590
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2013-03-21
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Lawry, Tristan J., Saulnier, Gary J., Wilt, Kyle R., Ashdown, Jonathan D., Scarton, Henry A., and Gavens, Andrew. Full-duplex ultrasonic through-wall communication and power delivery system with frequency tracking. United States: N. p., 2016.
Web.
Lawry, Tristan J., Saulnier, Gary J., Wilt, Kyle R., Ashdown, Jonathan D., Scarton, Henry A., & Gavens, Andrew. Full-duplex ultrasonic through-wall communication and power delivery system with frequency tracking. United States.
Lawry, Tristan J., Saulnier, Gary J., Wilt, Kyle R., Ashdown, Jonathan D., Scarton, Henry A., and Gavens, Andrew. Tue .
"Full-duplex ultrasonic through-wall communication and power delivery system with frequency tracking". United States. https://www.osti.gov/servlets/purl/1531950.
@article{osti_1531950,
title = {Full-duplex ultrasonic through-wall communication and power delivery system with frequency tracking},
author = {Lawry, Tristan J. and Saulnier, Gary J. and Wilt, Kyle R. and Ashdown, Jonathan D. and Scarton, Henry A. and Gavens, Andrew},
abstractNote = {A method and apparatus provide simultaneous bi-directional communications through a barrier using a pair of piezoelectric transducers. Outside-to-inside transmission of differentially encoded binary data is only sampled at the inside when a known repeated bit in a Barker sequence is transmitted in the other direction. Differentially encoded data is translated based on the absolute value of differences between each signal envelope sample and the previous signal envelope sample. Inside-to-outside data is transmitted by varying an electrical load on the inside transducer to vary the proportion of a continuous wave signal it reflects. The reflected portion of the continuous wave changes the electrical impedance of the outside transducer and this change is measured and interpreted as binary data. Two frequency selection algorithms select minimally sufficient and then optimal frequencies for power and data transmission by a frequency stepping process.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2016},
month = {9}
}