mid-term2 - ECE 5520, Spring 2010 Mid Term 2 March 18, 2010...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ECE 5520, Spring 2010 Mid Term 2 March 18, 2010 Time: 75 minutes Name: Question Points 1 2 3 4 5 6 7 8 9 Total 1 1. (5 points) What is the role of pulse-shaping in digital communication systems? 2. (10 points) In digital communication systems what characteristic of a received signal may be used for timing recovery. Explain. 3. (5 points) With your understanding of VSB modulation discussed in the class text, how do you compare the bandwidth efficiency of a VSB system with that of a QAM system? Explain 2 4. (10 points) If p T ( t ) satisfies the set of equations < p T ,k ( t- nT b ) , p T ,l ( t- mT b ) > = m,n k,l where p T ,k ( t ) = p T ( t ) e j 2 kFt explain how do we use this to construct a multicarrier transmit signal. Also, explain how the the transmitted data symbols can be extracted from the received signal, assuming an ideal channel. 5. (10 points) In OFDM, demodulation (the FFT) is applied to the portion of the each OFDM symbol that contains pure tones. Explain in your own words what does this statement refer to. Explain the role of cyclic prefix in achieving this goal....
View Full Document

This note was uploaded on 03/18/2011 for the course ECE 5520 taught by Professor Shamir,g during the Spring '08 term at University of Utah.

Page1 / 6

mid-term2 - ECE 5520, Spring 2010 Mid Term 2 March 18, 2010...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online