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 state-of-the-art topics such as LTE (SC-FDMA).
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: BKD3601-7
- T: 3PM-4PM & F: 2PM-4PM
- 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. ISBN-13: 978-0130422323. 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, W-CDMA and cdma2000 for 3G Mobile Networks, McGraw-Hill 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, Multi-Carrier 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 Asia-Pacific 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 up-coming class meterial
| Ch | Handouts & Slides |
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| 2 |
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| 3 |
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| 4 |
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| 5 |
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| 6 |
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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.) |
| Self-Evaluation 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 |
| Self-Evaluation 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 m-sequences
- 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 graduate-level 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 84-90 of [Karim and Sarraf, W-CDMA 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].
- IS-95
- FHSS
- GPS and Gold codes
- DSSS and m-sequences
- Multi-carrier and OFDM systems
- Wireless Channel (Part 2), multipath propagation and Equalization
- Multi-carrier 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.5-14, May 1990.
- OFDMA
- GSM, GPRS, EDGE, UMTS (W-CDMA) and OVSF code
- WiMAX and OFDMA
- LTE and SC-FDMA
- 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 Software-Defined 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 spread-spectrum 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