This widely used text presents the fundamental concepts and techniques of modern digital processing, with related applications, covering both time domain and frequency domain methods for the analysis purposes. The present book provides the basic tenets of methodological research so that researchers may become familiar with the art of using concerned methods and techniques in biomedical instrumentation. The book can be taken as a well-organized guide for researchers whose methodological background is not extensive. The book will serve as text for the students of B.Tech, M.Tech and PhD (Electrical Engineering, Electronics Engineering and Biomedical Instrumentation Engineering).