CAREER: Multiple Transmit Elements for High Speed Robust Wireless Local Area Networks

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There is a tremendous market for tetherless and ubiquitous networkaccess, and a great demand for nomadic computation andcommunication. A major component of such a system is a high speedrobust wireless local area network (WLAN) that provides services for alimited geographical area. This limited geographical area enables alarge density of access points as well as high power tranmissions andopens up the possibility of high rate robust multimedia communicationscomparable to wired systems. Even though the bandwidth is stillscarce, the spatial dimension can now be exploited: The size oftypical WLAN devices, such as laptops and hand-held computers, enableproper spacing of multiple antennas to provide diversity and codinggains.This research is aimed at a complete system design for multipleantenna methods in the WLAN environment including coding, modulation,channel estimation and power control strategies specifically tailoredfor the slow fading environment of a WLAN channel. In particular,high-rate multiple antenna coded modulation techniques and multipletransmit antenna joint source and channel coding strategies aredeveloped. The issue of channel estimation along with feedback isinvestigated and power control based on limited feedback is adressed.A general approach to multiple transmit antenna methods is explored byproviding a theoretical foundation for spatially separated antennas inWLAN environments. The education plan is closely aligned with the research work andemphasises the use of internet and computers in education by makinguse of Polytechnic University's newly installed WLAN system oncampus. Curriculum development addresses specific needs ofPolytechnic's professional masters program and is based on anintegrated, end-to-end approach to communication systems.