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Final exam W08

# Final exam W08 - Student Name Student ID Page 1 of 14 Final...

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Student Name: Student ID: Page 1 of 14 SYSC3501 Communication Theory Winter 2008 Final Examination Final Examination SYSC3501 Communication Theory Winter 2008 Duration 3 hours Course Instructors Adrian Chan Instructions 1. Put your name and student ID at the top of every page of this test. 2. Complete all questions. 3. Show all your work. 4. You may use a non-programmable calculator. 5. You are permitted a two-sided crib sheet (8.5” × 11”). 6. Tables are provided for you on a separate sheet. DO NOT WRITE ON THIS SHEET! 7. Submit all pages of your examination (including Tables) Name Student ID Signature Marks Q1a /30 Q1b /20 Q2a /10 Q2b /20 Q2c /20 Q2d /20 Q3a /30 Q3b /30 Q3c /20 Q4a /20 Q4b /20 Q4c /30 Q5a /30 Q5b /20 Q5c /20 Q6a /20 Q6b /20 Q6c /20 Total (/400)

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Student Name: Student ID: Page 2 of 14 SYSC3501 Communication Theory Winter 2008 Final Examination Question 1 A multiplexer, as shown in Figure 1 is used to transmit stereo sound, where m l (t) is the baseband signal corresponding the left speaker and m r (t) is the baseband signal corresponding the right speaker of a stereo system. Assume that both m l (t) and m r (t) are 12 kHz bandlimited signals. The resultant m(t) is transmitted using AM-DSB-C. Figure 1 1a. Frequency division multiplexing is used so that multiple stereo channels can be broadcasted simultaneously. Assuming that each channel must be separated by at least 10 kHz, how many channels can be broadcasted simultaneously using the channel bandwidth from 500 kHz to 1775 kHz? [30 marks]
Student Name: Student ID: Page 3 of 14 SYSC3501 Communication Theory Winter 2008 Final Examination 1b. If

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