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# Exam_2_5.jpg - EE 31200 R Communication Theory Cos 2-71fred...

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Unformatted text preview: EE 31200 / R Communication Theory_ Cos 2 -71fred\ Midterm !1\ Fall 2014 3 . Given a message signal m ( 1) with highest frequency I'M , and a carrier signal v. ( 1 ) = 5 cos ( 2 72 {` ! ). ( 2 ) ( 5% ) Determine the SSB -SC, D.SB -SC , and AM signals . V ( ( t ) : 5 cos [ 2 n fet ) m ( 1 ) = 5 cos ( 2n't (t ) SSB - SC = \5/ 2 ( COS 275 ( S ('t `fm ) ` upper .. ? + 5 D SB - SC =\ \5/ 2 COS 27 ( fc - fm ) +\ A 5/2 cogzin ( Setfun ){\ Am = ] |5 COS Of A fC- 14 } 5/ 2 goszin ( f( - -fm ) + + 5 /2 ( }2 #^ ( b ) ( 15% ) Based on your answer in ( a ) , fill out the following table . Total power Figure of merit Bandwidth Circuit Complexity S.SB - SC 1/2 ( 5 / 2 ) }} ( low or high ) ( DX. DSB- SC = ( 5 / 2)* +1 ( 5/ 2) } |2) X {c - I'm{ { }^fim lowX AM \$ ( 5 ) + 25 - 75) ( 3 ) X_ fe - fimb f s^ low high X thi ( + ) 5/ 4 5 / 4 Ac forfun . MIM Ac-for- be fet I'm 4 - 6...
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• Spring '08
• Sun
• Trigraph, Computational complexity theory, Circuit complexity, Carrier wave

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