Research Interests
My research interests are in wireless communication. The two
main uses for wireless communication systems are mobile
communications and broadcasting. Examples of wireless systems
include:
- cellular radio systems (e.g. GSM)
- mobile data networks (e.g. CDPD)
- digital audio (and TV) broadcasting (e.g. Eureka 147)
- wireless local area networks (e.g. IEEE 802.11)
- wireless replacements for conventional telephone and cable-TV
systems (e.g. LMDS/LMCS)
The primary research methods are:
- modeling and analysis
- computer simulation
- laboratory and field measurements
Current research interests include propagation measurement,
modeling and simulation at 1.8 and 28 GHz; centralized power
control algorithms for cellular systems; adaptive beam-forming
antennas for wireless local loop systems; and protocols for
wireless LANs.
Past research projects have included the design and construction
of a laboratory fading channel simulator, propagation
measurements using an antenna array, high-level design and
simulation of a wireless local loop system, a study of
narrow-band OFDM, simulation of dynamic channel allocation and
power control algorithms, capacity analysis and simulation of
digital audio broadcasting, review of meteor burst
communications, and design of detection algorithms for emergency
beacon signals.
Selected Publications
E. F. Casas and C. Leung, ``OFDM for Data Communication over
Mobile Radio FM Channels, Part II: Performance Improvement.''
IEEE Transactions on Communications, vol. 40, pp. 680-683, April
1992.
UBC EE Home Page /
Ed Casas /
edc@ece.ubc.ca