RTU 2016 Question Paper Semester IV Computer Science and Engineering Principles of Communication

cetllrrr I B {.}lA !t TotalNo of Pages: [l \o 4F4164 t-{ B.Tech. IV-Sem (Main & Back) Exam; June-July 2016 $ Computer Science & Enginee"irrg EI .l 4CS5A Principles of Communication Common with CS, IT Time: 3 Hours Maximum Marks: 80 Min. Passing Marks (Main & Back): 26 Min. Passing Marks (OId Back): 24 Attemp,t any five questions, selecting one question from each unit. Ail Questions carry equal marks. schematic diagrams must be shown wherever necessary. Any data you feer missing iuitabry be assumed and stated clearly. Units of quantities used,/ calculated must be stated clearly. Use of following supporting matterial is permitted during examination. (Mentioned in form No.205 ) I. %NIL 2. NIL UNIT.I Q,1 (a) Explain in detail VSB? t8l (b) A 400 Watt carrier is modulated to a depth of 75 percenr. Calculate the total Power in the modulated wave? t8l OR Q.1 (a) Explain in detail pre - emphasis and De _ emphasis? t8l (b) Find the carrier and modulating frequencies, the modulation index and maximum deviation of the FM wave represented by the vortage equation Y = 12 sin (6xl08t + 5 sin 1250t). tSl t4E41641 Page Lof 2 17szol

UNIT.II Q.2 (a) Write short note on sampling theorem? (b) Explain in detail pAM, pWM Modulation t8l schemes? t8l OR Q.2 (a) Write short notes on Aliasing and interpolation? (b) Explain Time division Multiplexing? t8l t8l UNIT-III Q.3 (a) Compare pCM and delta Modulation? (b) Write short note on TL carrier System? t8l t8l q Q.3 (a) Explain in detail ADM? (b) Explain DPCM? tsl t8l UNIT-IV Q.4 (a) Write short note on rdised cosine Spectrum? (b) Explain ASK, FSK in detail? t8l t8l -- OR Q.+ (a) Write short note on Inter Symbol lnterference? (b) Explain in detail epSK and MSK? t8l l8l f -\IT-\- Q.5 (a) Explain cDMA in detail? (b) Find the Processing gain of the system t8l when data rateis 7.g Kbps and the spread or chip rate is 9.6 Mbps. BpsK technique used for modulation ? tgl OR Q.5 (a) Explain the DSSS and FHSS? (b) Write shoft notes on pN Sequence and t8l CDMA? t8l [484L641 Page2 of2 17szol