Digital Telecommunications - Digital Modulation Quiz 9 | ECET 37400, Quizzes of Electrical and Electronics Engineering

Download Digital Telecommunications - Digital Modulation Quiz 9 | ECET 37400 and more Quizzes Electrical and Electronics Engineering in PDF only on Docsity! @ @ Ml Ea ECET 37400 — Digital Telecommunications Spring 2010 Quiz 9 - Digital Modulation 5 questions @ 4points each = 20 points a od 1, What is the angle of separation between adjacent points in a 32-PSK system? @<0.1 rad > 0.1 rad < @<0.2 rad Die Zar . O.2rad< 9 <0.3 rad a 2 Sh a 0.3 rad < @ <0.4 rad FU . 920.4 rad 2. Determine the phase of the symbol 10101 in 32-PSK if'a general mapping (starts at ~m rad) solution is used? 644 2 A. 9<0.42 rad B. 0.42 rad < 9 <0.8x rad { Z2ok bY nba | ——» (Q) 080 rad < 9 < 1.20 rad { D. 1.20 rad< p< 1.6n rad “i 6 Ko E. 9 2 l.6nrad Sl ad 3. Determine the total raw bit rate of a 256-QAM system with a 250 MHz carrier if the symbol rate is 0.01 symbols per carrier cycle. A. R< 4 Mbps 4 Mbps < R.<8 Mbps £ bio ynbul "Ol 4) ener 150 Pe . & Mbps < R<12 Mbps 2g 12 Mbps < R < 16 Mbps 3 R= 16 Mbps 20 "bp 5 4, Determine x-axis voltage value of the oi 10 (gray code mapping) in rectangular 64-QAM if the system delivers a peak power of 1W into J00Q. ,202-(202- 8) =./0) bee \ 272 . } 3VS x<6V [22] 10 . OVE X<OV E. x>9V 2972 5% “LW /7 = 2r0r /.0¢ 5. Determine the area of the detection region in the previous problem? A<1V B. 1V?<s A<2V C.2VS A<3V? v D3Vs A<4V? he AD 7202 ORY A, x<1V —_—>, IV <x<3V