Wireless Digital Communications, ELEG867 (Fall of 1997)


Instructor:

Dr. Xiang-Gen Xia

Office:

311 Evans Hall

Email/Phone:

xxia@ee.udel.edu, (302)831-8038

Time:

Tu. Th. 4:00-5:15pm

Place:

SHL 105

Office Hours

Tu: 5:30-7:00pm

Grading Policy:

  1. Homeworks: 30%
  2. Midterm project (TCM and Channel Equalization): 30%
  3. Final Project (Convolutional En/Decoding, CDMA and RAKE Receiver): 40%

Prerequisties:

Digital Communications, Digital Signal Processing, Statistical Signal Processing

Textbook:

Kamilo Feher, Wireless Digital Communications , Prentice-Hall PTR, New Jersey, 1995.

References:

  1. G. L. Stuber, Principles of Mobile Communication Kluwer Academic, Boston, 1996.
  2. K. Pahlavan and A. H. Levesque Wireless Information Networks , John Wiley and Sons, New York, 1995.
  3. J. G. Proakis, Digital Communications , McGraw-Hill, 1994.

Course Description:

This course includes some fundamental and current techniques on wireless digital communications, such as wireless channel modeling, digital modulation and demodulation (MODEM) techniques, and multiple access methods including TDMA, FDMA and CDMA systems, and finally two recent cellular mobile communication standards: GSM and IS-95.

Contents:

  1. Wireless communication channel modeling includes a basic treatment of radio propagation, such as envelop fading, Doppler spread, time delay spread, shadowing, and path loss, and antenna directional and omnidirectional fundamentals and radiation patterns
  2. Digital modulation-demodulation (MODEM) techniques includes pulse shaping for ISI-free band-limited transmission, eye-diagram concept, some efficient modulation schemes, such as $\pi/4$-DQPSK, GMSK, and trellis coded modulation (TCM), adaptive channel equalization algorithms, such as LMS equalizer, zero-forcing equalizer, and decision feedback equalizer
  3. Basics of error control coding including a review of some basic codes, such as Reed-Solomon and BCH codes, and convolutional codes and Viterbi decoding algorithms
  4. Multiple access methods includes time division multiple access (TDMA), frequency division multiple access (FDMA) and code division multiple access (CDMA) systems. The advantages and disadvantages for these three methods will be studied. In CDMA systems, the concept of spread-spectrum communication will be introduced. Two such techniques, frequency hopping and direct-sequence methods, will be presented. Some typical CDMA code generators, such as M-sequences, Gold codes and linear shift registers will be introduced. Fundamental limits for CDMA codes on their auto/cross correlations will be studied
  5. Current mobile communication standards, such as GSM and IS-95.