Doctoral Dissertations


Niaz Ahmed

Keywords and Phrases

Magneto Inductive; Underwater; Wireless Sensor Networks


"Underwater wireless sensor networks have found a number of applications in underwater environment monitoring, infrastructure monitoring, military applications and ocean exploration. Among the four possible means of underwater wireless communication, namely acoustic, electromagnetic (EM), magneto-inductive (MI) and optics communication, MI communication enjoys the advantages of being low cost and robust equally in air, water and soil. This dissertation presents design and implementation of a low-power and low-cost MI sensor network node that is suited for long-term deployment of underwater and underground infrastructure monitoring, such as bridge scour and levee scour monitoring. The designed MI sensor node combat the directionality of the single coil MI communication by utilizing 3D coil to both transmit and receive. The presented MI sensor node is tested in air and underwater to show robustness and reliability. The sensor node is designed after thorough analysis and evaluation of various MI challenges such as directionality, short range, decoupling due to mis-alignment of coils, and effect of metal structure. A communication range of 40 m has been achieved by the prototype sensor node. The prototyping cost of a sensor node is less than US$100 and will be drastically reduced at volume production. A novel and an energy efficient medium access control (MAC) protocol based on the carrier sense medium access (CSMA) has also been implemented for the designed sensor node to improve throughput in a dense network"--Abstract, page iv.


Zheng, Y. Rosa

Committee Member(s)

Pommerenke, David
Sedigh, Sahra
Kaur, Amardeep
Xiong, Haoyi


Electrical and Computer Engineering

Degree Name

Ph. D. in Electrical Engineering


National Science Foundation (U.S.)


This work is supported in part by the National Science Foundation grant #ECCS1408316 of the United States.


Missouri University of Science and Technology

Publication Date

Spring 2017

Journal article titles appearing in thesis/dissertation

  • Low-cost wireless sensors using magnetic induction for underwater and underground communications
  • Theoretical modeling of multi-coil channels in near field magneto-inductive communication
  • Effects of metal structures on magneto-inductive coupled coils
  • Multi-coil MI based MAC protocol for wireless sensor networks


xii, 74 pages

Note about bibliography

Includes bibliographic references.


© 2017 Niaz Ahmed, All rights reserved.

Document Type

Dissertation - Open Access

File Type




Thesis Number

T 11070

Electronic OCLC #