Thesis
Adaptive algorithm for high data rate through-metal communication
Master of Science (M.S.), Drexel University
Jun 2012
DOI:
https://doi.org/10.17918/00008081
Abstract
A number of control network applications necessitate data transmission in environments where metallic structures radio frequency network connectivity. In a majority of these applications, it is also highly undesirable to physically penetrate the impeding structure to enable communication through wires or cabling. One such example regards the deployment of wireless sensing and control networks on U.S. Navy vessels for vital automated ship operation maintenance. The ship hull obstructs electromagnetic wave propa- gaLion and limits network connectivity. However, mechanically penetratmg the bulkhead compromises the structural integrity of the ship compartments and the requirement for the vessel to remain watertight. In such applications, ultrasonic signaling has been proposed to achieve reliable data communication without penetration of the metallic structure. The reverberant nature of the acoustic channel generated between the interface of the transducers and metal wall becomes a network throughput bottleneck, bounding narrowband communication techniques to maximum data rates of roughly 5 Mbps in practice. Orthogonal Frequency-Division Multiplexing (OFDM) has smce been shown as a promising technique to mitigate the fre- qucncy selectivity of the ultrasonic channel and increase achievable data rates without the need for complex equalizers. However, OFDM is prone to high peak-to-avemge power ratios (PAPR) in the transmitted signal which can lead to decreased system performance. This thesis presents a link adaptive OFDM-based ultrasonic physical layer created to enhance through-metal communication by exploiting the slow-varying nature of the ultrasonic channel and employing a combined rate adaptive and PAPR reduction algorithm. Simulated and measured results obtained using this novel Joint Adaptive Algorithm suggest that an increase in throughput rates, reduction in PAPR, and adherence to a desired quality of service constraint can be simultaneously achieved in the ultrasonic channel. These enhancements provide throughput and reliability to support a variety of high-data-rate network applications in environments where metallic structures would otherwise compromise data transmission.
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Details
- Title
- Adaptive algorithm for high data rate through-metal communication
- Creators
- Magdalena M. Bielinski
- Contributors
- Kapil R. Dandekar (Advisor) - Drexel University, Drexel University (1970-)
- Awarding Institution
- Drexel University
- Degree Awarded
- Master of Science (M.S.)
- Publisher
- Drexel University; Philadelphia, Pennsylvania
- Number of pages
- xviii, 76 pages
- Resource Type
- Thesis
- Language
- English
- Academic Unit
- College of Engineering (1970-2026); Electrical (and Computer) Engineering (1970-2026); Drexel University
- Other Identifier
- 991021888722304721