Honors College Thesis
 

Demonstration of Indoor Localization of Miniature Objects Using Wireless-PoweredUltra-Wideband Tags

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https://ir.library.oregonstate.edu/concern/honors_college_theses/7d278v828

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  • Wireless localization of objects is useful for several applications that require the knowledge of position of objects or people. Additionally, power extraction from wireless signals eliminates the need for wires or any physical connections for charging. This project is based on system-level testing of an integrated circuit (IC) that combines these two concepts together to enable wireless systems capable of radio-frequency (RF) object tracking while wirelessly powering sensor nodes. The objective of this project was to highlight and test system function aspects which required knowledge of wireless signal propagation, link budgets, receiver sensitivity to incoming signals, and heterodyning and super heterodyne receivers. This project involved designing a single-transmitter, single-receiver setup to verify sensor charging and measure the sensor output signals and subsequently a 2D positioning example achieved by capturing signals using two receivers and interpreting resultant data in Matlab. While testing did affirm the feasibility of wireless tracking systems, factors such as ground connections and antenna orientation proved to be notable obstacles affecting system range. Key Words: electromagnetic waves, radio frequency, wireless propagation, receiver sensitivity, link budget
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