Research Interest
My research interests are in the areas of adaptive signal processing and broadband wireless communications, with emphasis on Ultra Wideband and multi-carrier systems. The research topics that I am currently involved in include:
* Novel technology and system for Body area networks
* Ultra Wideband Communications and Location systems
* Asymmetric OFDM and Quadrature OFDMA Systems
* Combination of Beamforming and MIMO technologies
* Digital compensation of RF distortion in broadband (OFDM) systems
* Precise Localization techniques for multiple users
* Acoustic signal processing for bio-medical applications
Research Awards
* The best paper award in First International Symposium on Applied Sciences in Biomedical and Communication Technologies in Denmark in 2008
* The best paper award in International Workshop on Ultra Wideband Systems in Finland in 2003
* The Student Travel Grant (US$1000) in IEEE ICC2003 awarded by IEEE ComSoc for the high quality of papers
Research Highlight - Wireless Body Area Network
* Channel Modelling:
-- Dynamics: the nature of WBAN channel
-- (Un-coordinated) Co-channel Interference: challeging problem
* Reliability: "Always on" even in harsh channels
* Low power design from signal processing perspective:
-- Minimize the transmission powr
-- Maximize the received Eb/N0
Research Highlight - OFDM
Recently, we developed asymmetric OFDM and Quadrature OFDMA systems based on the novel concept of layered FFT structure. The asymmetric OFDM system bridges the gap between OFDM and Single carrier systems, while Quadrature OFDMA system provides advantages including significantly lower complexity, reduced Peak-to-average power ratio, improved frequency offset sensitivity and diversity, compared to general OFDMA systems.
Research Highlight - UWB
I am one of the leading researcher in UWB in Australia, and an active contributor in international UWB society. My main contributions to the UWB society include:
* Systematic study of Rake receiver in UWB systems, including the condition for Rake receiver working efficiently and its performance under various combining methods. The work won the best paper award in the International workshop on Ultra Wideband Systems in 2003.
* Development of innovative channel estimation algorithms which can identify and estimate several principal multipath signals in a dense UWB multipath channel without estimating all the multipath signals.
* Development of a systematic solution for Multiband OFDM UWB systems within the framework of a low-cost and low-complexity system. This solution includes several inventions which could reduce the cost and complexity of Multiband OFDM systems significantly.