Midterm #3 of ECE301, Prof. Wang’s section
8–9pm Thursday, November 17, 2011, EE 170,
1. Please make sure that it is your name printed on the exam booklet.
Enter your
student ID number, email address, and signature in the space provided on this
page,
NOW!
2. This is a closed book exam.
3. This exam contains multiple choice questions and workout questions. For multiple
choice questions, there is no need to justify your answers.
You have one hour to
complete it. The students are suggested not spending too much time on a single
question, and working on those that you know how to solve.
4. There are 16 pages in the exam booklet. Use the back of each page for rough work.
5. Neither calculators nor help sheets are allowed.
Name:
Student ID:
Email:
Signature:
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Question 1:
[15%, Workout question, Outcomes 3, 4, and 5]
1. [15%] A discretetime signal
x
[
n
] is described as follows
x
[
n
] =
2
if
n
= 0
1
if
n
= 1 or

1
0
if
n
= 2
(1)
and
x
[
n
] is periodic with period 4.
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 Spring '06
 V."Ragu"Balakrishnan
 Digital Signal Processing

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