Discrete-time signal processing / Alan V. Oppenheim and Ronald W. Schafer, with John R. Buck. Oppenheim, Alan V. 1937- Schafer, Ronald W. 1938- Buck, John R. Signal processing Mathematics. Discrete-time systems. TK5102.9 .O67 1999 621.38043 OPD Includes bibliographical references (p. 851-858) and index. New Jercy : Prentice Hall, c1999. c1999. 1999 Text 888 : eng