Dealing with signal sampling techniques in digital signal processing and control, this text emphasizes the concept of intersample behaviour. Tools are presented for analyzing systems that contain both sampled and continuous time signals. The first section deals with digital signal processing and presents a unified description of the frequency domain characteristics of sampled and continuous signals, as well as sampling and reconstruction of signals, lattice and Kalman filtering and various related estimation issues. The second half of the book looks at digital control and covers such topics as sampled data control, multirate control and periodic systems. There is a complete discussion of modern discrete time control and a unified treatment of Fourier analysis of signals.