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:
- Homeworks: 30%
- Midterm project (TCM and Channel Equalization): 30%
- 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:
- G. L. Stuber, Principles of Mobile Communication
Kluwer Academic, Boston, 1996.
- K. Pahlavan and A. H. Levesque Wireless Information Networks ,
John Wiley and Sons, New York, 1995.
- 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:
- 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
- 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
- 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
- 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
- Current mobile communication standards, such as GSM and IS-95.