Block pulse functions have been studied and appliedextensively in the past fifteen years as a basic set offunctions for signal characterizations in systems scienceand control.Written for staff, students and engineers in industryinterested in digital signal processing for system analysisand design, this book presents the principles and techniquesofblock pulse functions in a systematic and uniform manner.Readers who are interested in using these functions in theirown problems can obtain an overview of the existing methodsand the developing tendency of this area. In comparison withother basic functions or polynomials, block pulse functionscan lead more easily to recursive computations to solveconcrete problems.