Discrete-time signal processing continues to be a dynamic and rapidly growing field with a wide range of applications including speech and data communication, acoustics, radar, sonar, seismology, remote sensing, instrumentation, consumer electronics, and many others. Discrete-time Signal Processing, by the authors of the classic text Digital Signal Processing (Prentice Hall, 1975), is a completely up-to-date, thorough, and coherent treatment of the fundamentals of this field. Considerable emphasis is placed on illustrative examples and intuitive interpretation. The authors include more than 400 carefully prepared problems to help the reader develop a thorough foundation in the use of this material.