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I-Nav: Reinventing Navigation When GPS Fails

2024–2025
Geolocation Embedded Systems Research Patent Pending

Overview

Developed a novel navigation system targeting environments where GPS signals are unavailable or unreliable — such as indoor spaces, underground structures, and urban canyons. The research was conducted at the University of Texas at Dallas and featured by the UTD ECE department. The system introduces a new approach to positioning that does not rely on satellite signals, with a patent currently pending and the research published in a 2026 journal paper.

I-NAV isochrone maps comparing ORS and I-NAV with AGLM
(a) Overlay of ORS and I-NAV 10-minute isochrones, (b) ORS isochrone, (c) I-NAV with Adaptive Gaussian Likelihood Model (AGLM)

Publication

Published Paper — Array (Elsevier), 2026 Srijeet Qazi, Justin Alejandro, Rafid Umayer Murshed, Tierra Smiley Evans, Julia Lippert, Mohammad Saquib. "I-NAV: Inverse Navigation for questionnaire-based geolocation in GPS-denied environments." Array, Volume 31, 2026, 100978. ISSN 2590-0056. https://doi.org/10.1016/j.array.2026.100978

Featured Coverage

The project was highlighted by the UTD ECE department as a standout student research initiative.

Read the UTD ECE Feature →

Project Video