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Unformatted text preview: ECE 5520, Spring 2011 Question List for Chapters 5 and 6 February 6, 2011 The following list is a set of possible questions from Chapters 5 and 6 that you should know before attending the second midterm exam. This list may not be complete, and thus other questions from the chapter may be asked in the exam. 1. What is gray coding and what is its significance in digital communication systems? 2. What is the role of pulse-shaping in digital communication systems? 3. What is the difference between pulse-shaping and transmit/receive filtering in digital communication systems? (if any) 4. What does the term Nyquist criterion refer to? 5. In a digital communication system, is the transmit filter a Nyquist pulse? 6. Which of the following statements are correct: (i) “Nyquist filter” and “raised-cosine filter” are synonym terms. (ii) A Nyquist filter is also a raised-cosine filter. (iii) A raised-cosine filter is also a Nyquist filter. 7. In digital communication systems in what sense a pair of matched filters are optimal? 8. Present an equation that relates f 1 ( t ) and f 2 ( t ), if they are a pair of matched filters. 9. Using the Parseval’s relation, show that if p T ( t ) and p R ( t ) are a pair of Matched Nyquist filters integraldisplay ∞-∞ | P T ( f ) | 2 df = integraldisplay ∞-∞ | P R ( f ) | 2 df = 1 ....
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This note was uploaded on 03/18/2011 for the course ECE 5520 taught by Professor Shamir,g during the Spring '08 term at Utah.
- Spring '08