To:
ECE 1001 Students
From: Stan Burns
8 December 2010
Re:
Final Exam Information
The following information provides a sample of several of the topics covered in previous final exams. Observe that
you will be forming two-person teams to work on the exam. Please form your teams in advance so that you have an
opportunity to study together prior to taking the exam. These sampe questions may not necessarily cover all of the
topics but are a sample of what has been done before.
The coverage will be as stated in an earlier e-mail:

The Final Exam is scheduled for Monday, 20 December from 12:00-1:55 in our regular classroom. The
protocols are the same. Here is a copy of what will show up on the cover sheet:

This is a two-person team collaborative quiz. Your team is to provide a single solution to this quiz. Each
person earns the same grade on the common 175/200 portion. Submit only ONE solution with your names
and, of course your corrected and original resumes as reviewed by Career Services. I strongly urge you
work the exam together in sequence rather than each of you individually completing a portion. The grades
are almost always higher when you collaborate as a team throughout. As you work with your colleague,
please keep the noise level in the room to a reasonable level.

Open book and notes; laptops and notebook computers are OK but no WEB access, use of wireless,
blackberry, texting, tweets, IR links, etc.

The UMD final exam schedule is located at
http://www.d.umn.edu/registrar/fall2010policyproced%2018.pdf

I have received some questions about the coverage. I haven't prepared the Final Exam yet but looking at
our syllabus there could be topics including:
 Signal Processing-Prof. Hasan and supplemental WEB posting on "Lena".
 Control Systems-Prof. Yang
 Neural Networks-Prof. Kwon
 Communications Systems and Optical Communications-Prof. Hayee
 Engineering Ethics including short essays on upcoming distributed material.

Level of difficulty would be comparable to Quizzes 1 and 2.

Now a selection of past problems-not all-inclusive but should give you an idea of what to expect.
………………………
IEEE Code of Ethics
Everyone in this class keeps track of the news by some combination of surfing the WEB, reading newspapers and
magazines, watching television, and listening to the radio. Refer to some news item involving an industrial or
government entity (local, national, or international) or an individual person or group of persons over the last year or
two in which you perceive, and in your opinion, there is a possible breach of the a portion of the IEEE Code of
Ethics.
Your answer should be in an essay format and describe a specific news event and relate it to the specific listing
circled in the copy of IEEE Code of Ethics provided on the next page. Be specific! Your response should be
thoughtful and demonstrate that you understand the possible breach of the IEEE Code of Ethics. Generalities and
political commentaries should be avoided.
Correct spelling, grammar, and good organization strengthens my evaluation of your essay.
………………………….
Signal and Image Processing
[Parts (a) and (b) 10 Points; Part (c) 20 Points; Part (d) 15 Points]
(a)
(b)
(c)
i.
ii.
iii.
iv.
(d)
Provide two examples of a one-dimensional analog signal: _____________ and ______________
One example of a two-dimensional analog signal: _______________
One example of a three dimensional analog signal: _______________
An analog signal has a voltage range between 0 and 5 volts. It is to be digitized with 8-bit accuracy. What
will be the quantized voltage level for each digitization step?
The Apple iPhoneTM has a 3-color 640 by 4800 pixel transmissive LCD display. Answer the following:
The image aspect ratio is:_________
List the three primary colors used to generate the image.__________ ___________
___________
The number of individual transistors that are required to display a full color image:___________________
Assuming 8 bits for each primary color, how many different colors can be displayed?________________
The image of Lena (Lena Sjööblom) has been
used for a couple of decades to illustrate the
imaging effects of different DSP (digital signal
processing) algorithms. Discuss the
controversy behind this use of her image. Short
easy required. In addition, which one of the ten
IEEE Code of Ethics statements most accurately
reflects the issue behind this use of her image
………………………………
Optical Communications Systems and Fiber Optics
Fill in the Table with the best answer. There is only one best answer and there are more answers on the list than
questions.
ATTRIBUTE (4 Points Each)
Transmit and receive frequencies used
by your cell phone
Spectral range used for most optical
fiber communication systems
IEEE 802 (g) standard wireless data rate
(Your laptop wireless maximum data
rate unless you use the 802 (b) card).
This is the data rate for the wireless
hubs used at UMD.
Bandwidth of a typical stereo sound
system; also considered the range of
human hearing
Theoretical upper limit data rate for a
single optical fiber
Typical data rates for DSL to your
house
Typical telephone MODEM data rate
which is considered obsolete
YOUR
ANSWER
SELECT FROM THIS LIST
(a)
25 TBits/second
(b) Ultra-violet portion of the spectrum
(c ) Infra-red portion of the spectrum
(d) 1.8 GHz
(e)
56 Kbits/second
(f)
55 Mbits/second
(g)
(h)
(i)
(j)
(k)
(l)
650 nm
20 Hz to 20 kHz
20 kHz to 20 MHz
2 MBits/sec to 7 MBits/second
2 GBits.sec to 7 GBits/second
108 MHz
Short Answer (6 Points Each)
(a) Assume you have fiber to your home computer with an allowed data rate of 100 MBits/second. How
much time would be required to download a standard DVD?
(b) UMD has optical fiber links to the Twin Cities. Assume a distance of 300 km. How much time is required
for a signal to reach the Twin Cities if the index of refraction for the fiber optic cable is:
n=1
n=1.5
……………………………
Related to Optical Communications and Related Networks and Systems
1.
What is the most important advantage optical fiber systems have over copper wires (Coaxial cable)
systems?
2.
Define what is meant by TDM and WDM and provide examples. Sketches would be helpful.
3.
Provide the letter match for the most reasonable frequency or bandwidth characteristics from the list for
each of the following system descriptions. You may use an answer only once!. There are more answers
than questions.
_____Bandwidth of an analog (NTSC standard) U.S. color television signal.
_____Bandwidth of a standard AM band broadcast signal, i.e. KDAL at 610 kHz
_____Bandwidth of a typical stereo sound system; also considered the range of human hearing
_____Bandwidth of a standard FM band broadcast signal, i.e. KUMD at 103.3 MHz
_____Frequency range of the FM broadcast band
_____IEEE 802 (g) standard wireless data rate (Your laptop wireless maximum data rate unless you use the 802 (b)
card). This is the data rate for the wireless hubs used at UMD.
_____Typical telephone MODEM data rate (not broadband or DSL)
_____Direct TV satellite approximate broadcast frequency
_____Spectral range used for most optical fiber communication systems
_____General frequency range supported by coaxial cable systems.
_____Digital cellular telephone
(a)
56 kbits/s
(b)
(e)
3 kHz
(f)
(i)
10 kHz
(j)
(m)
2.4 GHz
(n)
(q)
up to a few hundred MHz
(t)
None of the above
………………………………….
Control Systems
20 Hz –20 kHz (c)
12 GHz
3.58 MHz
(g)
88-108 MHz
55 Mbit/s
(k)
Infrared
200 MHz
(o)
6 MHz
(r )
up to a few hundred kHz
(d)
(h)
(l)
(p)
(s)
54-60 MHz
200 kHz
24 MHz
Ultraviolet
1Gbit/s
Annotated sketches and diagrams are useful in answering these questions.
(a)
Provide a definition for a Control System and Define Its Basic Components
(b)
What is the difference between an “Open-Loop” and a “Closed-Loop” Control System?
(c)
Provide three reasons, closed-loop control systems, are used.
(d)
VI
Derive the transfer function
A
VO
for the control system block diagram given below.
VI
B
+
__
C
VO