ECE 242: Digital Communications and Networks
Department of Electrical and Computer Engineering
University of Connecticut
http://www.engr.uconn.edu/˜shengli/teaching.htm
Spring 2004
Prerequisite
ECE 202: Signals and Systems;
STAT 224Q: Probability Models for Engineers
Time and Place
9:00am – 9:50am, Monday, Wednesday & Friday, Math Science Building (MSB) 411
Required Text
Principles of Communications, 5th Ed., R. E. Ziemer and W. H. Tranter, John Wiley & Sons Inc., 2002
Communication Networks, 2nd Ed., A. Leon-Garcia and I. Widjaja, McGraw Hill, 2004.
Instructor
Dr. Shengli Zhou
Office: ITE-343
Phone: 860-486-4593 Fax: 860-486-2447
Email: shengli@engr.uconn.edu
Teaching Assistant
Mr. Atef Isaac
Office: ITE-327
Phone: 860-486-2349 Fax: 860-486-2447
Email: atef@engr.uconn.edu
Office Hours
2:00–3:00pm Tuesday, Thursday (See Mr. Isaac)
2:00–3:00pm Monday (See Dr. Zhou)
Homework
Homework is assigned almost weekly and due in class one week after the assignment. Until the solution is
handed out, late homeworks are accepted with 20% reduction each day.
1
Computer/Design Assignments
Due days will be announced during the classes.
Midterm and Final Exams
Midterm Exam 1: 9:00am–9:50pm, Feb. 27, Friday, closed book, with one “cheat-sheet”
Midterm Exam 2: 9:00am–9:50pm, Apr. 05, Monday, closed book, with two “cheat-sheets”
Final Exam: university schedule, closed book, with three “cheat-sheets”
Grading
Homework: 15%; Midterm Exams: 20% + 20%; Computer Assignments: 10%; Final Exam: 35%;
Grade Scale
(A: 85-∞); (A-: 81-85); (B+: 77-81);
57-61); (D: 50-57); (F: −∞-50)
(B: 73-77);
(B-: 69-73);
(C+: 65-69);
(C: 61-65);
(C-:
Academic Misconduct Statement
Academic Misconduct in any form is in violation of the University of Connecticut Student Conduct Code
and will not be tolerated. This includes, but is not limited to: copying or sharing answers on tests or
assignments, plagiarism, and having someone else do your academic work. Depending on the act, a student
could receive an F grade on test/assignment, F grade for the course, or could be suspended or expelled.
WebCT
http://webct.uconn.edu
http://students.uconn.edu
2
Course Objective
Fundamentals of digital communication systems. Encoding of analog signals for digital transmission. Baseband data transmission. Multiplexing techniques. Digital carrier modulation schemes. Basic information
theory. Source encoding techniques. Basic error control coding.
Fundamentals of communication networks. The OSI model. Physical/Data Link/Network layer issues.
Course Outline
1. Introduction to Digital Communications Introduction. Overview of digital communication system.
Review of probability and random variables. Stochastic processes. Narrowband processes.
2. Coherent Digital Modulation Gram-Schmidt orthogonalization. Signal-space representation. MAP
receiver (matched filter). Probability of error calculation and approximation. PSK, FSK, MSK, and
general techniques. Bandwidth issues.
3. Noncoherent Digital Modulation Optimal noncoherent receiver. Noncoherent ASK, FSK, DPSK,
and associated probabilities of error.
4. Source Coding Entropy. Fundamental limits on data compaction. Huffman coding.
5. Channel Coding Mutual information. Fundamental limits on coding (channel capacity). Block codes.
Convolutional codes. The Viterbi algorithm. Trellis-coded modulation.
6. Bandlimited Channels Intersymbol interference. Nyquist criteria. Equalization. Eye patterns.
7. Introduction to Communication Networks Examples of networks and network issues. The OSI
model and related standards.
8. Physical Layer Mostly review of digital topics from first part, as applied to networks.
9. Data Link Layer Protocols. Correctness of protocols.
10. Local Area Networks ALOHA. Ethernet. FDDI. Token ring networks.
11. Network Layer Routing. Congestion control and design to avoid congestion.
12. Other Topics Application and transport layers. Encryption. Applications of layers. ISDN. ATM.
Performance monitoring and evaluation. Queuing theory.
Not all topics may be covered.
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Meeting Schedule
Date
January
01/21
01/23
01/26
01/28
01/30
February
02/02
02/04
02/06
02/09
02/11
02/13
02/16
02/18
02/20
02/23
02/25
02/27
Activity
Classes 1-5
Classes 6-17
Midterm 1
4
Date
March
03/01
03/03
03/05
03/08
03/10
03/12
03/15
03/17
03/19
03/22
03/24
03/26
03/29
03/31
Activity
Classes 18-28
April
04/02
04/05
04/07
04/09
04/12
04/14
04/16
04/19
04/21
04/23
04/26
04/28
04/30
Classes 29-41
Spring Break
-
Midterm 2