The North Jersey Chapter of the IEEE Communications Society
New Jersey Institute of Technology
Department of Electrical and Computer Engineering
New Jersey Center for Multimedia Research
present
ADAPTIVE NONCOHERENT CODED M-ARY ORTHOGONAL MODULATION
FOR DS-CDMA
Svetislav Maric (speaker) and Vincent Lau
University of Cambridge, Department of Engineering
Signal Processing and Communication Group
Wednesday, April 9, 1997
Pizza & Soda 6:15 PM, Seminar 6:30 PM
NJIT, ECEC Room 202
ABSTRACT:
An adaptive coding scheme is introduced for a DS-CDMA system. The System
uses non-coherent M-ary orthogonal modulation with RAKE receiver and
power control. Both a fast fading channel and a combined fast fading,
shadowing and power control channel are considered. General and
numerically feasible expressions are derived for the evaluation of the
transfer function bounds for both the fixed rate code and the adaptive
codes. Simulations are performed to verify the results. It is found
that there is a significant improvement in the average throughput and
the BER performance in the adaptive coding scheme is relatively robust
to shadowing, while the fixed rate codes are ineffective in the shadowing
environment.
BIO:
Svetislav Maric got his Ph.D. degree from the University of Rochester,
Rochester, NY in 1990 for his work on frequency hopping CDMA systems for
radar and sonar, and mobile radio. In 1991 he was a post-doctoral
fellow at the Wireless Information Network Lab at Rutgers University and
then joined the Department of Electrical Engineering at City College of
New York. since 1995 he has been on the faculty of the Engineering
Department at University of Cambridge, UK.
His main research interests are in sequence design for spread spectrum
CDMA systems, most recently for multirate fiber-optic CDMA systems, as
well as in general analysis of DS-CDMA for wireless communications
(adaptive coding, diversity applications, etc). Speaker's e-mail:
svm@eng.cam.ac.uk.
