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.


  • Information regarding final exam
  • Midterm Results: Mean 67.5, Std 14
  • Information regarding midterm exam
    • Date: 6 Mar 2015
    • TIME: 09:00 - 12:00
    • ROOM: BKD 3207 and 3214
    • Closed book. Closed notes. No cheat/study sheet.
    • Basic calculator needed.
    • A (small) ruler will be helpful.
    • 9 pages (including 1 cover page)
    • 14 questions (including 1 extra-credit question)
    • The last page contain the following formulas.
  • Welcome to ECS455! Feel free to look around this site.
  • A basic RSS feed is created to track and inform updates

General Information

  • Instructor: Asst. Prof. Dr.Prapun Suksompong (
  • Official Office Hours
    • Tuesday 9:30-10:30
      Tuesday 13:30-14:30
      Thursday 13:30-14:30
    • Please feel free to ask any question or express any concern after class.
  • Course Syllabus
  • Main Textbook: D. Tse and P. Viswanath, Fundamentals of Wireless Communication, Cambridge University Press, 2005.
  • References
    • A. Goldsmith, Wireless Communications, Cambridge 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: You may take a look at the slides from previous year for a sneak preview of the up-coming class material.

Problem Set


  Due Date Remarks/Solutions
HW1 Jan 30, 10:30AM

MATLAB files

Solutions [Posted @ 9PM on Feb 23]


Feb 6 13, 10:30AM

Solutions [Posted @ 9:30PM on Feb 23]
HW3 Feb 27, 10:30AM Solutions [Posted @ 11:30AM on Feb 28]
HW4 Not Due Solutions [Posted @ 12:30AM on Mar 1]
Self-Evaluation (1) March 27, 5PM  
HW5 April 10, 10:30AM Solution [Posted @ 3PM on April 19]
HW6 May 8, 10:30AM Solution [Posted @ 10PM on May 8]
HW7 Free Solution + m-file [Posted @ 9:30 on May 8]
Formula sheet for final exam May 11, 5PM  
Self-Evaluation (2) May 15  



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. 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.
  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