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.


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).


  • Welcome to ECS455! Feel free to look around this site.
  • Information regarding final exam
    • Date: 3 Apr 2012
    • TIME: 09:00 - 12:00
    • ROOM: BKD 2601
    • Closed book. Closed notes. No cheat/study sheet.
    • Basic calculator allowed
    • Provided formulas and formula sheet
    • Cover Page
    • 11 Pages, 13 Problems
    • Rough Distribution of Material: Ch4 (55%), Ch5 (35%), Ch6 (10%)
  • Information regarding midterm exam

General Information

  • Instructor: Dr. Prapun Suksompong (
  • Office Hours
    • Room: BKD3601-7
    • Time:
      • Wednesday: 15:30-16:30
      • Friday: 9:30-10:30
    • Please feel free to ask any question or express any concern after class.
  • Course Syllabus
  • Class information
  • Main Textbook: A. Goldsmith, Wireless Communications, Cambridge Press, 2005.
  • References
    • Free Textbook: D. Tse and P. Viswanath, Fundamentals of Wireless Communication, Cambridge University Press, 2005.
    • 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.
    • 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.

Handouts and Course Material


Ch Handouts & Slides
  • Remark: Take a look at the slides from previous year for a sneak preview of the up-coming class meterial

Problem Set


  Due Date Remarks/Solutions
HW1 Jan 31


HW2 Feb 14 Solution
For problem 2b, a minus sign is missing in my answer. This has been fixed. Some explanation regarding dB and dBm is also added at the end of the solution for problem 2.
HW3 Not Due Solution
Self-Evaluation form (1) Feb 2  
HW4 Mar 29 Solution
HW5 Not Due Solution
MATLAB files for Q1, Q2, Q3-4
Self-Evaluation form (2) Apr 3  



Reading Assignment

Course Outline

  1. Review: Fourier transform and basic communication systems
  2. 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.
  3. Duplexing: TDD vs FDD
  4. Multiple access schemes
  5. Spread Spectrum Communications
  6. 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
    • OFDMA
  7. GSM, GPRS, EDGE, UMTS (W-CDMA) and OVSF code
  8. WiMAX and OFDMA
  9. LTE and SC-FDMA

Misc. Links