Dr S Varadarajan is a Professor in the Department of Electronics and Communication Engineering, S.V University college of Engineering, S.V.University, Tirupathi, Andhra Pradesh, India. He did his BE (ECE) and ME (Communication Systems) from NIT, Warangal and PhD in the area of Radar Signal Processing from S.V.University, Tirupathi. He has more than 20 years of teaching experience at UG and PG levels. He has taught subjects like Signals & Systems, Digital Signal Processing, Digital Image Processing, Advanced Digital Signal Processing, Multirate Signal Processing, Communication Engineering, Electronics and Microprocessors, etc. He has published more than 100 papers in various international and national journals and conferences. He is a reviewer for more than three international journals, which include, IEEE Transactions on Signal and Image Processing. His research interests include Wireless System Design, Digital Signal Processing and Image Processing, with applications in Biomedical Signals and Images.