Dissertation Title: Subsignals Technique for Estimating Parameters of Signals and Its Applications

Date: 2025/11/13 – 2025/11/13

Dissertation Title: Subsignals Technique for Estimating Parameters of Signals and Its Applications

Speaker: Guowei Shi, Ph.D. candidate at SJTU Global College

Time: November 13rd from 9:30 -11:00 a.m., 2025 (Beijing Time)

Location: Room 414A, Longbin Building

Abstract

This dissertation presents the Subsignals Technique for Estimating Parameters of Signals (STEPS), a novel framework for accurately estimating frequency, amplitude, phase, and damping in complex, noisy signals. STEPS extracts multiple subsignals and exploits their collective spectral information via the DFT to build equations linking spectral features to unknown parameters. The method is extended from 1D single-frequency to multi-frequency, multidimensional, and damped signals, outperforming conventional techniques. Applications include SAFE for FMCW radar, achieving high accuracy, and vision-based 3DoF pose estimation with nanometer precision, validated through theory, simulation, and real-world experiments.

Biography

Guowei Shi received his B.S. degree in mechanical engineering from Jilin University, Changchun, China in 2021. He is currently pursuing his Ph.D. degree in mechanical engineering at the Global College, Shanghai Jiao Tong University, Shanghai, China. His current research interests include precision measurement and signal processing.