In less than three decades, the status of cellular telephones has moved from laboratory breadboard via curious luxury item to the world's most pervasive consumer electronics product. Even though wired telephony is 100 years older and the beneficiary of "universal service" policies in developed countries, the number of cellular phones has exceeded wired phones for a few years and the difference keeps growing. For hundreds of millions of people in developing countries, cellular communications is the only form of telephony they have experienced.
Synopsis
This course provides an introduction to mobile communications system principles, design and technology. It also covers stateoftheart topics such as LTE (SCFDMA).
Announcements
 Annoucement slides are updated.
 Information regarding the final exam
 Date: 4 Mar 2011 (Friday)
 Time: 9AM – 12PM
 Room: BKD 3206
 More information will be posted here.
 Cover page
 12 Pages, 15 Questions
 Cover all the topics that were presented in lectures/HWs.
 Cumulative
 Focus on the materials that haven’t been on the midterm.
 About 50% of the scores are from questions based on material in Chapter 4.
 These notes are provided for your studying pleasure....
 Cumulative
 Provided formulas
 One shared formula sheet.
 Copies of this sheet will be distributed in the exam room.
 Copies of this sheet will be distributed in the exam room.
 Date: 4 Mar 2011 (Friday)
 Information regarding midterm exam
 Date: 24 Dec 2010
 TIME: 09:00  12:00
 ROOM: BKD 3206
 Closed book. Closed notes. No cheat/study sheet.
 Basic calculator allowed
 Provided formulas
 Cover page
 Material: Ch1 20%, Ch2 65%, Ch3 15%.
 Exam from previous year.
 Scores. The leftmost column shows the last three digits of your ID.
 Date: 24 Dec 2010
 Tuesday lecture is moved (again) to 2:40PM. We will meet at this new time starting on November 23.
 Welcome to ECS455! Feel free to look around this site. [Posted @ 11AM on Nov 3]
General Information
 Instructor: Dr. Prapun Suksompong (prapun@siit.tu.ac.th)
 Course Syllabus(Updated on Nov 14)
 Class
information
 Office Hours
 Room: BKD36017
 T: 3PM4PM & F: 2PM4PM
 Please feel free to ask any question or express any concern after class.
 Main Textbook: D. Tse and P. Viswanath, Fundamentals of Wireless Communication, Cambridge University Press, 2005.
 References
 Theodore S. Rappaport, Wireless Communications: Principles and Practice, 2nd Edition, Prentice Hall PTR, 2002. ISBN13: 9780130422323. Call No. TK5103.2 R37 2002
 There are quite a number of typos in this book. Please go to the update page to download the pdf file of the pages that have been fixed.
 A. Goldsmith, Wireless Communications, Cambridge Press, 2005.
 M. R. Karim and Mohsen Sarraf, WCDMA and cdma2000 for 3G Mobile Networks, McGrawHill Professional, 2002.
 J. S. Lee and L. E. Miller, CDMA Systems Engineering Handbook, Boston, MA: Artech House, Oct. 1998.
 R.E. Ziemer, Fundamentals of Spread Spectrum Modulation, Colorado Springs: Morgan & Claypool Publishers, 2007
 A. Bahai, B. R. Saltzberg, and M. Ergen, MultiCarrier Digital Communications: Theory and Applications of OFDM, 2nd ed., New York: Springer Verlag, 2004.
 H.G. Myung and D.J. Goodman, Single Carrier FDMA: A New Air Interface for Long Term Evolution, Wiley, 2008.
 More References
 Whitt, The Erlang B and C Formulas: Problems and Solutions, class notes, 2002
 James R. Norris. Markov Chains. Cambridge University Press, 1997.
 Spectrum Frequency Chart
 Infographic from Cellphones.org
 GSM World Coverage map
 GSM AsiaPacific Coverage
Handouts and Course Material
 Slides: Introduction to ECS455. (Updated on Nov 14)
 Slides from previous year are posted to give you a sneak preview of the upcoming class meterial
Ch  Handouts & Slides 
1 

2 

3 

4 

5 

6 

Problem Set
Due Date  Remarks/Solutions  
HW1  Nov 23  Solution 
HW2  Dec 14 @ 2:39 PM  Solution 
HW3  Dec 21 @ 2:39 PM  You will use discrete time approximation to simulate Poisson process for the call requests and the exponentially distributed call durations. At the end of the assignment, you will compare the blocking probability that you evaluate from this model with the answer provided by the Erlang B formula. For Q1.f, assume that the W_i are i.i.d. exponential random variables. The expected value for each of them is 1/lambda. (This fact will be discussed in lecture 12. You may read about it in the posted notes on PP.) 
SelfEvaluation form (1)  Jan 4 @ 2:39 PM  
HW4  Jan 18 @ 2:39 PM  Solution 
HW5  Feb 15 @ 2:39 PM  Solution 
HW6  Feb 25 @ 10:39 AM  Solution 
SelfEvaluation form (2)  Mar 2 @ 12:00 PM 
Calendar
Reading Assignment
 [T&V] Intro of Ch 2
 [T&V] Intro of Sec 2.1
 [T&V] Section 2.1.1, 2.1.2, 2.1.6
 [T&V] Intro of Sec 2.2,
 [T&V] Section 2.2.1, 2.2.2
Course Outline
 Review: Fourier transform and basic communication systems
 Cellular communications, Principles of cellular radio
 Wireless Channel (Part 1)
 Spectrum Allocation
 Frequency Reuse and Sectoring
 Trunking Theory and Erlang B formula
 Poisson Process with review of basic probability theory
 Markov Chain
 The "best" introductory textbook on Markov chain is probably the one written by Norris. This again will be an overkill for this class but it serves as a good reference if you want to dig into this topic further. There are some sample chapters available on the web as well.
 Whitt wrote an article that provide several remarks on Erlang B formula via a number of HW exercises. Those who want to read more about Erlang B study may find it interesting.
 Duplexing: TDD vs FDD
 MIDTERM:24 Dec 2010 TIME 09:00  12:00
 Multiple access schemes
 FDMA
 TDMA
 CDMA (Part 1)
 SDMA
 Spread Spectrum Communications
 DSSS and msequences
 For those who want to know more about Galois Field and its application, one of the best book in the market is written by Stephen B. Wicker.
 I also have my own notes on this topic beased on the textbook above. These notes are graduatelevel and hence not required for our class.
 This web site can help you find many primitive polynomials.
 CDMA (Part 2) and orthogonality, Walsh sequences and Hadamard Matrix
 For deeper understanding of DSSS and CDMA, here are some references:
 Page 8490 of [Karim and Sarraf, WCDMA and cdma2000 for 3G Mobile Networks, 2002].
 Chapter 1 and 2 of [Viterbi, CDMA: Principles of Spread Spectrum Communication, 1995]
 Chapter 13 of [Goldsmith, Wireless Communications, 2005]
 Section 3.4.3 of [Tse and Viswanath, Fundamentals of Wireless Communication, 2005]
 Chapter 4 and 5 of [J. S. Lee and L. E. Miller, CDMA Systems Engineering Handbook. Boston, MA: Artech House, Oct. 1998].
 Chapter 4 of [R.E. Ziemer, Fundamentals of Spread Spectrum Modulation. Colorado Springs: Morgan & Claypool Publishers, 2007].
 IS95
 FHSS
 GPS and Gold codes
 DSSS and msequences
 Multicarrier and OFDM systems
 Wireless Channel (Part 2), multipath propagation and Equalization
 Multicarrier transmission and frequency division multiplexing
 Orthogonality (revisited)
 DFT and FFT
 Oversampling
 Cyclic Prefix and circular convolution
 For deeper understanding of OFDM, please read
 Bahai, 2002, Evolution of OFDM (posted on the SIIT online lecture note system)
 J.A.C.Bingham : "Multicarrier Modulation for Data Transmission : An Idea Whose Time Has Come,"' IEEE Commun. Mag., Vol. 28, No. 5, pp.514, May 1990.
 OFDMA
 GSM, GPRS, EDGE, UMTS (WCDMA) and OVSF code
 WiMAX and OFDMA
 LTE and SCFDMA
 FINAL: 4 Mar 2011 TIME 09:00  12:00
Misc. Links
 Prapun's Notes on Communication Theory
 Prapun's Notes on Probability Theory
 Comparison of wireless data standards
 The Evolution of Cell Phone
 C.R. Johnson and W.A. Sethares, Telecommunications Breakdown: Concepts of Communication Transmitted via SoftwareDefined Radio, Prentice Hall, 2003.
 History of Cell Phones
 Marty Cooper, Inventor of the Cell Phone, Recreated the First Cell Phone Call for 60 Minutes on CBS
 The Communicators: Martin Cooper (featured in a "60 Minutes" profile on May 23, 2010)
 Secret communications system: the fascinating story of the lamarr/antheil spreadspectrum patent
 Andrew Viterbi's Fabulous Formula
 Download IEEE 802 Standards
 The History of the Internet in a Nutshell
 iPhone 3GS Disassembly
 Power Control in OFDMA Wireless Networks
 OFDMA (Rohde and Schwarz)
 The Latest In WiMAX In Depth (from ROCKETBOOM)
 What is WiMAX? (from ROCKETBOOM)
 The IEEE 802.11 Universe
 Social topics
 Learn the Greek Alphabet in less than 10 minutes
 The Greek Alphabet Song