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 introduces selected topics in mobile communications to undergraduate students. Topics include wireless channel, principles of cellular communications, multiple access methods, digital mobile communication systems: TDMA, GSM, CDMA, WCDMA, multicarrier and OFDM systems.
Announcements
 Information regarding the final exam [Posted @ 4:30PM on May 24; Last updated at 7PM on June 1]
 Check this course website regularly for breaking news about the final.
 Date: June 9, 2017
 TIME: 9:0012:00
 ROOMs: BKD 3214 & 3207
 10 pages: 1 cover page + 8 pages+ 1 formula page
 For the formula sheet,...
 Some boxes that are over the 40symbol limit may have been modified.
 Since it is created by other students in the class, use at your own risk.
 To save time, read the cover page posted here before going into the exam room.
 16 questions: 10+2+5+2+2+12+3+4+7+7+8+8+14+3+12+1
 Cover all the materials that we discussed in class and practice in the HWs.
 Material Distribution (scorewise): 5 (SEC4.14.3) + 30 (SEC4.4) + 11 (SEC4.5) + 34 (4.64.9) + 19 (CH5)
 For your studying pleasure....
 All postmidterm annotated slides combined in one pdf file.
 All postmidterm HWs and their solutions [Updated @ 7PM on June 1]
 Checked HWs can be picked up in front of the EC office on the 6th floor.
 All postmidterm exercises and their solutions [Updated @ 7PM on June 1]
 Graded exercises are posted on the SIIT Lecture Note System
 If you have valid reason for missing class on the day that we have exercise, please indicate the date, exercise number, and the reason in the second selfevaluation form. Make sure that you also submit/email supporting document/evidence to Dr.Prapun (if you haven't done so).
 Midterm results [Posted @ 9AM on Mar 30]
 Information regarding the midterm exam [Posted @ 10AM on Mar 13; Updated @ 8:30PM on Mar 19]
 Check this course website regularly for breaking news about the midterm.
 Date: March 23, 2017
 TIME: 9:0011:00
 ROOMs: BKD 3214, 3507
 Information about the misterm exam:
 7 pages (including the cover page)
 To save time, read the cover page posted here before going into the exam room.
 14 questions. (5+1.5+1.5+6+8+4+10+3+7+6+3+2+6+4 = 67 pt)
 Cover all the materials that we discussed in class and practice in the HWs.
 Material Distribution (scorewise): 14 (CH1) + 32 (CH2) + 21 (CH3)
 Closed book. No formula sheet. Some formulas are provided. (See the cover page.)
 For your studying pleasure....
 All premidterm annotated notes combined in one pdf file.
 Correction: On page 145, when we try to find the expected value of the Bernoulli RV at the end of the page, the numbers 0 and 1 were mistakenly placed. The final result still holds though. The expected value of a Beroulli RV is simply its success probability p. [Credit: Sirimintra]
 All premidterm HWs and their solutions
 Checked HWs can be picked up in front of the EC office on the 6th floor.
 All premidterm exercises and their solutions
 Graded exercises are posted on the SIIT Lecture Note System
 If you have valid reason for missing class on the day that we have exercise, please indicate the date, exercise number, and the reason in the self evaluation form. Make sure that you also submit/email supporting document/evidence to me (if you haven't done so).
 This site can be accessed via ecs455.prapun.com
 Welcome to ECS455! Feel free to look around this site.
General Information
 Instructor: Asst. Prof. Dr.Prapun Suksompong (prapun@siit.tu.ac.th)
 Office: BKD, 6th floor of Sirindhralai building
 Office Hours: T 14:2015:20, W 14:2015:20, F 9:1510:15
 Additinally, please feel free to ask any question or express any concern after class.
 Course Syllabus [Distributed in class on Jan 25]
 Main Textbook: D. Tse and P. Viswanath, Fundamentals of Wireless Communication, Cambridge University Press, 2005.
Handouts and Course Material
 Slides: Course Introduction
 Chapter 1
 Slides: 1.1 Introduction to wireless and mobile communications [Distributed in class on Jan 25; Updated @ 2PM on Jan 27]
 Slides: 1.2 Wireless Channel (Part 1) [Distributed in class on Jan 25 and on Jan 27]
 Annotated version [Posted @ 2:30PM on Jan 27; Updated @ 3PM on Feb 1]
 Exercise 1 Solution [Posted @ 3PM on Feb 1]
 Exercise 2 Solution [Posted @ 3PM on Feb 1]
 Slides: 1.31.5 Spectrum Allocation [Posted @ 8:30AM on Feb 1]Distributed in class on Feb 1]
 Chapter 2
 Slides: 2.1 Frequency Reuse [Posted @ 9PM on Feb 2] [Distributed in class on Feb 3]
 Exercise 3 Solution [Posted @ 3PM on Feb 8]
 Exercise 4 Solution [Posted @ 4:30PM on Feb 23]
 Annotated version [Posted @ 11:30PM on Feb 10]
 Slides: 2.2 CoChannel Interference [Posted @ 10AM on Feb 8] [Distributed in class on Feb 10]
 Annotated version [Posted @ 11:30PM on Feb 10]
 Slides: 2.3 Sectoring [Posted @ 3PM on Feb 10]
[Distributed in class on Feb 10]
 Annotated version [Posted @ 11:30PM on Feb 10; Updated @ 4:30PM on Feb 15]
 Slides: 2.4 Erlang B Formula [Posted @ 11:30PM on Feb 10]
[Distributed in class on Feb 10]
 Annotated version [Posted @ 4:30PM on Feb 15]
 Exercise 5 Solution [Posted @ 4:30PM on Feb 23]
 Chapter 3
 Sections 3.13.2: DiscreteTime Approximation [Posted @ 9AM on Mar 1]
 Annotated version [Posted @ 10AM on Mar 3; Updated @ 8:30PM on Mar 19]
 Correction: On page 7, when we try to find the expected value of the Bernoulli RV at the end of the page, the numbers 0 and 1 were mistakenly placed. The final result still holds though. The expected value of a Beroulli RV is simply its success probability p. [Credit: Sirimintra]
 Exercise 6 Solution [Posted @ 11:30PM on Mar 10]
 Sections 3.3: Markov Chains and Their LongTerm Behavior [Posted @ 9AM on Mar 3]
 Annotated version [Posted @ 3PM on Mar 3; Updated @ 1:30PM on Mar 10]
 Exercise 7 Solution [Posted @ 11:30PM on Mar 10]
 Exercise 8 Solution [Posted @ 11:30PM on Mar 10]
 Section 3.4: Engset Model [Posted @ 10:30 on Mar 8]
 Annotated version [Posted @ 1:30PM on Mar 10]
 Exercise 9 Solution [Posted @ 10:30AM on Mar 16]
 Slides [Posted @ 8:30PM on Mar 11]
 Chapter 4
 Slides: 4.1  4.2 TDD vs. FDD; TDMA vs. FDMA [Posted @ 10AM on Mar 29]
 Annotated version [Posted @ 9AM on Mar 30]
 Slides: 4.3 DSSS [Posted @ 9AM on Mar 31]
 Annotated version [Posted @ 9:30AM on Apr 7]
 Slides: 4.4 msequence [Posted @ 9:30AM on Apr 7; Updated @ 10AM on Apr 21]
 Annotated version (part A) [Posted @ 9:30AM on Apr 7]
 Annotated version (part B) [Posted @ 3PM on Apr 7; Updated @ 10PM on Apr 19 and @ 10PM on Apr 27]
 Expanded version (part C) [Posted @ 10PM on Apr 27]
 Exercise 10 Solution [Posted @ 9:30AM on Apr 21]
 Exercise 11.1 Solution [Posted @ 10PM on Apr 19]
 Exercise 11.2 Solution [Posted @ 10PM on Apr 27]
 Slides: 4.5 Cyclic Codes [Posted @ 10AM on Apr 19]
 Annotated version [Posted @ 10PM on Apr 27]
 Exercise 12 Solution [Posted @ 10PM on Apr 27]
 Exercise 13 Solution [Posted @ 2PM on May 27]
 Slides: 4.6 CDMA [Posted @ 8:30PM on Apr 28]
 Annotated version [Posted @ 8:30PM on Apr 28; Updated @ 3PM on May 3 and @ 5PM on May 5]
 Exercise 14 Solution [Posted @ 2PM on May 27]
 Slides: 4.7 Sync. CDMA
[Posted @ 9AM on May 3]
 Annotated version [Posted @ 5PM on May 5]
 Exercise 15 Solution [Posted @ 2PM on May 27]
 Slides: 4.8 IS95
[Posted @ 9AM on May 3]
 Annotated version [Posted @ 9:30AM on May 18]
 Slides: 4.9 3G and OVSF [Posted @8:30AM on May 17]
 Annotated version [Posted @ 9:30AM on May 18; Updated @ 12:30AM on May 21]
 Exercise 16 Solution [Posted @ 2PM on May 27]
 Chapter 5: OFDM
 Slides: 5.15.2 DFT, FFT, and Cyclic Prefix [Posted @8:30AM on May 17]
 Annotated version for Section 5.1 [Posted @ 12:30AM on May 21; Updated @ 4PM on May 24]
 Annotated version for Section 5.2 [Posted @ 4PM on May 24; Updated @ 4PM on May 26]
 Exercise 17 Solution [Posted @ 2PM on May 27]
 Exercise 18 Solution [Posted @ 2PM on May 27; Updated @ 7PM on June 1]
 Correction: The calculation for the last number in Q1 was wrong. The final answer was written correctly though. The solution has been updated.
 Slides: 5.35.4 Multicarrier Communication, LTE [Posted @ 10AM on May 24]
 1x2 version for Section 5.3 [Posted @ 4PM on May 26]
 1x2 version for Section 5.4 [Posted @ 4PM on May 26]
 Remark: You may take a look at the slides from previous year for a sneak preview of the upcoming class material.
Problem Set
D  Due Date  Remarks/Solutions 
HW1  Feb 8 (Wed), 4:30PM 

HW2  Mar 1 (Wed), 4:30PM 

HW3  Mar 17 (Fri), 4:30PM 

HW4  Not Due 

Eval 1  Mar 23 (Thu)  
HW5  Apr 28 (Fri), 4:30PM 

HW6  May 17 (Wed), 4:30PM 

HW7  Not Due 

E2Forml  May 30, 4:30PM 

Eval 2  June 9 

Calendar
Reading Assignment
Additional References
 A. Goldsmith, Wireless Communications, Cambridge Press, 2005.
 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.
 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.
 MATLAB Primer, 8th edition T. A. Davis. CRC Press, 2010.
 MIT RES.6.007 Signals and Systems (1987) on Youtube
Supplementary References
 Wireless Channel
 Ray tracing
 J. W. McKown and R. L. Hamilton, "Ray tracing as a design tool for radio networks," in IEEE Network, vol. 5, no. 6, pp. 2730, Nov. 1991.
 See FIg 1 and the "Efficient Algorithms" section.
 Cellular communications, Principles of cellular radio
 Markov Chain
 The "best" introductory textbook on Markov chain is probably the one written by Norris. The whole textbook is 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.
 Markov Chain
 Multiple access schemes
 CDMA (Part 1)
 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.
 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].
 DSSS and msequences
 Multicarrier and OFDM systems
 For deeper understanding of OFDM, please read
 P. Suksompong, Introduction to OFDM and its PAPR Drawback, 2009 (in Thai)
 Bahai, Evolution of OFDM, 2002
 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.
 For deeper understanding of OFDM, please read
Misc. Links
 Article: Wired and Wireless Networks Compete—Cooperatively, Robert W. Lucky, ieee spectrum, 2012
 Spectrum Allocation
 EM Waves and Their Propagation
 Video: CU physicist Bob Richardson lectures on the propagation of electromagnetic radiation (1981)
 Video: Science@NASA  EMS Electromagnetic Spectrum (Episode 2)  Radio
 Video: EM wave animation (linear polarization)  1, 2, 3
 Video: Linear, Circular and Elliptical Polarization Animation
 Video: Dipole Antenna Radiation  1, 2
 Video: Mobile Phone Radiation: 1, 2
 Infographic from Cellphones.org
 Comparison of wireless data standards
 The Evolution of Cell Phone
 Article: Jim Giles, Traffic jam: the coming cellphone crunch, New Scientist, November, 2010
 Textbook: 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
 Video: The Communicators: Martin Cooper (featured in a "60 Minutes" profile on May 23, 2010)
 Are Mobile Devices Destroying Your Body
 Secret communications system: the fascinating story of the lamarr/antheil spreadspectrum patent
 Remembering Hedy Lamarr, the Hollywood Star Who Helped Make WiFi
 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
 Video: OFDMA (Rohde and Schwarz)
 Video: The Latest In WiMAX In Depth (from ROCKETBOOM)
 Video: 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
 Whitt, The Erlang B and C Formulas: Problems and Solutions, class notes, 2002
 Textbook: James R. Norris. Markov Chains. Cambridge University Press, 1997.
 GSM World Coverage map
 GSM AsiaPacific Coverage
 Besser Associates, BesserNet.com (many RF interactive design programs/tutorials)
 Prapun's Notes on Communication Theory
 Prapun's Notes on Probability Theory