ECE 5325 – Wireless Communication Systems

 

Course Taught: T, Th 2-3:20

                                3 credits

                                Spring 2009 (taught on odd years)

 

Professor: David Landon, 220-0459, david.x.landon@gmail.com

                Scheduled Office Hours:

3259 MEB on T, Th 3:20-4:30 unless nobody stays to ask questions

 

Text:       T.S. Rappaport, Wireless Communication, Prentice Hall, 2002 Edition

                If you have an older edition, COPY the problems from a new book.

                SOLUTION MANUALS are available in the ECE office

 

ECE 5325 Website:

www.ece.utah.edu/~ece5325

Lecture notes, portfolio assignments, announcements, schedule, etc.

 

Prerequisites:

ECE 3500 Signals and Systems

ECE 3300 Electromagnetics

 

Course Material: Introduction to wireless transmission systems. This course will emphasize how individual parameters affect overall system design and performance. Topics include: basic cellular systems and parameters, multipath channels and modulation techniques.

 

At the completion of this course, students will be able to:

1)       Topics related to cellular systems

a.        Describe how a cellular system functions.

b.       Compute the number of users a particular system can accommodate.

c.        Compute the required S/I ratio for a system, list and compute sources of interference.

d.       Design a system for increased capacity using trunking, cell splitting, directional antennas, etc.

e.        Compare multiple access schemes in terms of capacity, power/range, and multipath resilience: TDMA, FDMA, CDMA, Packet Radio

f.         Recognize component technologies in GSM, cdma2000, and LTE

2)       Topics related to physical multipath channels

a.        List the types of interferers that contribute to multipath interference, large and small scale fading, reflections and attenuation, etc. Describe and determine the effect of these effects on system performance.

b.       Determine appropriate interference models to use for a given environment and compute the effective interference.

c.        Compute and measure Raleigh and Rician fading channels.

d.       Compute a system link budget for a bandlimited channel and also for a spread spectrum channel. Include the effects of multipath fading, interference, Doppler spread, etc. and the effects of the cellular network.

3)       Topics related to modulation techniques

Describe, analyze, simulate, and outline hardware block diagrams for :

a.        Analog Modulation: AM, FM

b.       Digital Modulation:

                                                               i.      Phase Shift Keying: BPSK, QPSK (incl OQPSK, π/4 QPSK ), DPSK, M-ary PSK

                                                              ii.      Frequency Shift Keying: FSK, MSK,GMSK

                                                            iii.      Spread Spectum Systems: DSSS, FHSS

                                                            iv.      Multiple access strategies (TDMA,CDMA,Amps)

4)       Diversity

a.        Describe and compute diversity gains via maximal ratio combining and selection combining

b.       Describe the benefits of the following diversity techniques

                                                               i.      Equalizer

                                                              ii.      RAKE receiver

                                                            iii.      Interleaving

                                                            iv.      OFDM

                                                             v.      Spread spectrum

c.        Compute the capacity benefit of using MIMO systems

5)       Error correction

a.        Describe how a basic forward error correction code works

b.       Compute how Es/No and Eb/No are related

c.        Compare coding gains in terms of coding rate and block size

6)       Information Theory

a.        Compare codes in terms of Shannon’s capacity

b.       Describe how Shannon’s bound on compression applies to voice vs. data in wireless systems

c.        Compute quantization noise

d.       Describe how a linear predictive coder (LPC) vocoder works

7)       Students will also research one area of wireless communication, networking, or systems that is not covered in this course, prepare an on-line tutorial for it, and present it to the class.

 

Portfolios: Each day you will be asked to answer a question associated with the lecture and do 1-3 related homework problems. The question might be "How do you compute the power required for transmission?" Your portfolio for that day should include instructions on how to determine the power followed by the homework problems assigned to practice this. The instructions (typically about a page) should be written so YOU can understand them. Exams will be open portfolio, closed book, so include everything you need to solve the problems. You may include tables and figures copied from the text, but please don't copy the text itself. Portfolios will be checked in three ways: (1) your instruction section will be graded on whether it looks useful, (2) non-textbook problems will be spot-checked for accuracy, and (3) Rappaport textbook problems will be graded on completeness only. You are responsible for checking your own textbook homework solutions. Solution manuals will be available in the ECE office and Marriott Library Reserve. Portfolios may be in any notebook you wish but must be held together with an index in the front and each page or section clearly numbered. 3-ring binders are excellent.

 

Exams: Three midterm exams will be given during the semester. Dates are given on the web page. If you have conflicts with these dates, such as travel or an overburden of exams that day, please let me know as soon as possible. The final exam will be comprehensive. Your exam grade will be the highest of the final plus the midterms or the final alone.

 

Project: Each student will choose a topic that is not taught in the class (or a significant expansion of an in-class topic). Examples include a specific communication or networking protocol, system, or standard, a survey / analysis of commercially-available antennas, transceivers, etc., a specific design for a communication system, analysis of a particular communication environment, optical communication methods, etc., etc. etc. Look for a topic that interests you, perhaps related to your potential research or work, that you would like to learn about in more depth than we will be covering in the class. At the end of the semester, we will have a mini-Wireless Symposium, where students will present their work much like a professional symposium. 

1)       Research the topic in detail. At least one website, one textbook, and one IEEE journal should be used as references. Patents will also be accepted as references. All sources of materials MUST be properly referenced.

2)      Write a 5-page system context section that addresses the following questions depending on which of two scenarios best fits your topic:

1.       If you have chosen a particular system, answer these questions directly for your system. 

1.       What modulation is used? Why?

2.       How much power is transmitted? How should that level be selected?

3.       How does fading or interference influence the link budget in this system design?

4.       What techniques are used to improve the link budget?  Why not others?

5.       What methods of compression are used?  Why not others?

6.       What other techniques could be added and why might they have been avoided?

7.       How is RF spectrum shared with other users?  Why was that chosen over other candidates?

8.       How spectrally efficient is this system? How does that compare to cdmaOne?

2.       If you have a more focused sub-topic, answer all of the questions for a 0.5 W 2-dipole spatial diversity antenna transmitter, 1 Mbps data rate, QPSK system using a ½-rate convolutional encoder with 7/8-rate Reed Solomon for FEC, root-raised cosine shaping filter with alpha = 0.35, 14 kbps LPC vocoder, using FDMA to separate users.  However, when you get to your focused sub-topic, insert it where it belongs and explain how it performs differently than this reference system otherwise would.

1.       What modulation is used? Why?

2.       How much power is transmitted? How should that level be selected?

3.       How does fading or interference influence the link budget in this system design?

4.       What techniques are used to improve the link budget?  Why not others?

5.       What methods of compression are used?  Why not others?

6.       What other techniques could be added and why might they have been avoided?

7.       How is RF spectrum shared with other users?  Why was that chosen over other candidates?

8.       How spectrally efficient is this system? How does that compare to cdmaOne?

3)      Then, write a 5-10 page “textbook section” on your topic. This must be written entirely in your own words.  DO NOT copy ANYTHING from the web or other source. (See Cheating Policy, this is STRICTLY enforced, and you will receive an F in the class if you copy anything that is not properly referenced.) IF you think a figure or two from another source will significantly add to your writeup, you may include them, if you put a complete reference to where the figure was obtained in the figure caption.  Include at least one simulation (Simulink, Matlab, ADS, etc.), quantitative analysis, software development, etc. for your topic in your textbook.

4)      Prepare a 15 minute Power Point (or similar) presentation on your topic.

 

Grades on the Project:

A (90-100)              Good quality textbook section and presentation. A significant simulation or other quantitative analysis. Minimum of 6 references including two IEEE journal articles.

B (80-89)                Good quality textbook section and presentation. A reasonable simulation or other quantitative analysis. Minimum of 3 references including one IEEE journal article.

C (70-79)                Good-moderate quality textbook section and presentation. A moderate or minimal simulation or other quantitative analysis. Minimum of 3 references, including at least one IEEE journal article.

 

Grading:

Portfolio                                                 10%       

Project                                                    15%

                Midterm I                                               25%                                       

                Midterm II                                             25%

                Midterm III                                            25%                       

The final exam will be broken into 3 parts, each of which can “replace” a midterm score.

 


Please tell me about yourself:

 

Name___________________________________________

 

Are you an Undergrad or Graduate Student ?

 

What do you hope to learn in this class?

 

 

 

 

 

What have you heard about this class?

 

 

 

 

 

How do you like to learn things?

 

                Lectures                

                Interactive software

                Web research

                Library research

                Reading the text, other books, or magazine articles

                Hands-on / In the Lab

                Demos

                Studying with friends

                Other ___________________________

 

How much time a week do you plan to devote to this class OUTSIDE of lectures?

 

 

 

 

 

 

Anything else I should know about you to help you do well in this class?

 

 

 

               

 

Thank you!

               


Cheating Policy: Just don't

 

Here are some things that constitute cheating:

 

1)      Copying someone else's work on an exam. If you accidentally see another student's work on an exam, WRITE a NOTE in your exam and tell me during the exam. Honesty is of great value. You will not be penalized for this.

2)      Copying someone else's work on homework. I hope you WILL work in groups on your homework, labs, software assignments, etc. And I hope that every team member will contribute to this work. If you do not contribute (had to work late and couldn't make the group meeting), then don't copy their work.

3)      Copying things from a book, web, magazine, etc. Give a complete reference and clearly "quote" anything that you want to reference that someone else has done. Even if you don't use their words, but you mention or discuss their ideas, give them a reference. If you are asked to write a report or essay, it must all be in your own work. Just rearranging the words is called paraphrasing. (Paraphrasing is just rearranging the words.) Paraphrasing is also NOT your work.

 

What happens if you cheat?

 

Under U of U policy, you could receive an F in the class, be suspended from school, be fined, or be expelled from the university. So just don't cheat.

 

IEEE Code of Ethics:

 

We, the members of the IEEE, in recognition of the importance of our technologies in affecting the quality of life throughout the world, and in accepting a personal obligation to our profession, its members and the communities we serve, do hereby commit ourselves to the highest ethical and professional conduct and agree:

 

1  to accept responsibility in making engineering decisions consistent with the safety, health and welfare of the public, and to disclose promptly factors that might endanger the public or the environment;

2  to avoid real or perceived conflicts of interest whenever possible, and to disclose them to affected parties when they do exist;

3  to be honest and realistic in stating claims or estimates based on available data;

4  to reject bribery in all its forms;

5  to improve the understanding of technology, its appropriate application, and potential consequences;

6  to maintain and improve our technical competence and to undertake technological tasks for others only if qualified by training or experience, or after full disclosure of pertinent limitations;

7  to seek, accept, and offer honest criticism of technical work, to acknowledge and correct errors, and to credit properly the contributions of others;

8  to treat fairly all persons regardless of such factors as race, religion, gender, disability, age, or national origin;

9  to avoid injuring others, their property, reputation, or employment by false or malicious action;

10 to assist colleagues and co-workers in their professional development and to support them in following this code of ethics.