P. Sumathi

Papers

Total Citations

H-Index

About

P. Sumathi’s research centers on signal processing and sensor systems, with a particular focus on ultrasonic ranging and mobile robotics. Her most cited work, “Sliding DFT based ultrasonic ranger” (2008), introduces an innovative approach to range finding by applying the sliding discrete Fourier transform (SDFT) to extract low-frequency sinusoidal envelopes from modulated ultrasonic signals. This method enhances the accuracy of continuous wave ultrasonic sensing by leveraging phase shifts between infrared and ultrasonic signal envelopes, offering a robust solution for mobile robot navigation and obstacle detection. Though her citation count is modest—with this key paper garnering 3 citations—the work represents a thoughtful integration of digital signal processing techniques into practical sensing hardware. Sumathi’s contribution lies in advancing non-contact distance measurement, a critical component in autonomous systems. Her research demonstrates a clear application of theoretical signal processing to real-world engineering challenges, making her work a valuable reference for students and researchers exploring ultrasonic sensor design and embedded system implementations.