Title: On some recent results for signal reconstruction from “non-uniformly encoded” sampling
Abstract: The classic problem of non-uniform sampling of data has a rich history, yet continues to be of interest to many given its application in devising efficient event-triggered mechanisms for asynchronous or distributed communication/control, and low-power analog-to-digital (ADC) converters. In this talk, I will first focus on “time-encoded sampling,” which represents an interesting paradigm for temporal discretization and has garnered recent interest. Using the theory of irregular sampling over general function spaces, I will first present a sufficient condition for achieving perfect recovery over generalized shift-invariant spaces (SISs), of which the bandpass (and bandlimited) signal space is a well known instance, as well as an appropriate (iterative) interpolation scheme. Our work builds upon and extends prior work, especially that of Gontier-Vetterli ’13 on such time-encoded machines (TEMs). We present illustrative results for some classical signal spaces highlighting both the value, as well as limitations of single-TEM-based time-encoding schemes. Using key ideas from this work, I will also seek to present some ongoing work and (possibly interesting) directions of related inquiry.
This is joint work with Roshaan Soundarapandian (formerly at IIT Kharagpur and now at Qualcomm Inc.), and Stefano Rini (NYCU Taiwan).
Bio: V. Amitalok J. Budkuley is an assistant professor in the Dept. of Electronics and Electrical Communication Engineering (E&ECE) at the Indian Institute of Technology Kharagpur. He received his B. Engg. degree in Electronics and Telecommunications Engineering from Goa University, in 2007, and his M. Tech. and Ph. D. degree in Electrical Engineering from the Indian Institute of Technology Bombay, Mumbai, India in 2009 and 2017 respectively. In between, he spent some time in industry working with Cisco Systems Inc.. From 2016 to 2019, he was at the Dept. of Information Engineering, The Chinese University of Hong Kong (CUHK) as a research assistant and then as a post-doctoral fellow.
His research interests include signal processing for distributed communication and control, communication theory, cryptography and security.