Signals & systems / Alan V. Oppenheim, Alan S. Willsky, with S. Hamid Nawab. Signals and systems Oppenheim, Alan V., 1937- Willsky, Alan S. Nawab, Syed Hamid. System analysis. Signal theory (Telecommunication) QA402 .O63 1997 621.38223 20 OPS Includes bibliographical references (p. 921-929) and index. New Delhi : PHI learning c1997. c1997. 1997 Text xxx, 957 p. : eng