{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Quiz03-Sec1-sol

# Quiz03-Sec1-sol - EE380 Communication Systems Spring...

This preview shows pages 1–2. Sign up to view the full content.

EE380 – Communication Systems Section 1 – SET 1 Spring 2010-2011 Quiz Number 3 – Solutions Closed Book; Closed Notes Time Given=8 minutes (Apr 28, 2011) “IcertifythatIhaveneitherreceived norgivenunpermitted aidonthisexaminationand that I have reported all such incidents observed by me in which unpermitted aid is given.” Signature Name Student ID Problem 1: [4pts] A signal m ( t ) has a spectrum that is non-zero over the range [0, 10KHz], i.e., the signal bandwidth is 10KHz. A carrier at 10MHz is modulated by m ( t ) to generate a modulated signal x c ( t ). (a) [1pts] If the modulation is DSB-SC, over what frequency range is the spectrum of x c ( t ) non-zero? Only specify positive frequency range. Solution: [9.99MHz, 10.01MHz] (b) [1pts] If the modulation is AM, over what frequency range is the spectrum of x c ( t ) non-zero? Only specify positive frequency range. Solution: [9.99MHz, 10.01MHz] (c) [1pts] If the modulation is USB (upper single sideband), over what frequency range is the spectrum of x c ( t ) non-zero? Only specify positive frequency range.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}