Buon Kiong Lau
Buon Kiong Lau
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While an enormous amount of research has been done in various areas of multiple antenna systems, there has been a noticeable lack of research that exploits the interactions and links between those areas. Thus in the future, the biggest performance improvements can be anticipated from interdisciplinary research. One prime example for this is the interplay between the antennas and the MIMO wireless channels. In other words: how can the antennas and systems be optimized at the design stage, so that during actual operation, they exploit - rather than suffer from - wireless multipath environments.
My current research focus is on the application of MIMO techniques in compact systems. In such systems, e.g. mobile terminals, strong mutual coupling exists among the closely separated antennas. The coupling and inherently high spatial correlation undermine the expected performance gain from MIMO techniques. While suitable compensation techniques are available, a size-performance tradeoff governs the achievable result. Thus, fundamental limits for compact multiple antenna systems in relation to practical implementations are also of interest. Another research topic is the optimal design of antenna systems for both the terminals and base stations, taking into consideration the propagation channel and practical aspects (such as user influence).
One important emphasis of my research is the practical significance of the research results. As a result, close collaborations with Sony Ericsson Mobile Communications AB and Ericsson Research have been established.
Current Research Grants
- Vetenskapsrådet (The Swedish Research Council) Senior Researcher ("rådsforskare") Position Grant on for the topic "Novel Antenna System Design
Paradigm for High Performance Mobile Communications", within the
specialization of "Optimization of Antenna Systems" in Sep 2010, 3 years (possible extension of 3 more years), 3.7 million SEK, 2011-2014 (A total of 7 rådforskare grant were offered by Vetenskaprådet in 2010 over all areas of science).
- Vetenskapsrådet (The Swedish Research Council) Project Grant on for the topic "Novel Antenna System Design Paradigm for Compact MIMO Terminals" in Nov 2012, 2
years, 0.8 million SEK, 2013-2014.
- VINNOVA ICT-Program "Smartare, snabbare, konvergerande lösningar"
Grant on the project "Antenna-Channel
Harmonization for Throughput Enhancement in Advanced Mobile Terminals",
3 million SEK, 2010-2013. Matching co-funding available through Sony Mobile Communications AB.
- eLLIIT strategic research grant for "Very Large Arrays; Theory and Practice", awarded to several staff members at the department and at Linköping University (total of 1.1 million SEK per year for 5 years). Linköping University and Lund
University are equal partners in this project.
Past Research Grants
- Vetenskapsrådet (The Swedish Research Council) Forskarassistent Position
Grant on the project "Fundamental Limits of Compact MIMO Systems" in
Nov 2006, 3.8 million SEK, 2007-2011 (9% success rate among male
- VINNOVA Sino-Swedish Program Grant on the project "Access technologies:
multiple access, multiple users, multiple distributed antenna systems"
for collaboration between Lund University and KTH (Royal Institute of
Technology) with three premiar Chinese universities: Beihang University,
Tsinghua University and Huazhong University of Science and Technology, 4
million SEK, 2008-2011.
Telecom Program Grant on the project "Innovative Multiple Antenna
Structures for Compact Mobile Terminals", 1.296 million SEK, 2009-2010.
Matching co-funding available through Sony Ericsson Mobile
- VINNOVA Telecom Program Grant on the
project "MIMO Technology for Compact Multiband Antenna Systems", 3
million SEK, 2006-2010. Matching co-funding available through Sony
Ericsson Mobile Communications AB.
- Ericssons forskningsstiftelse (Ericsson
Research Foundation) Grant for a Guest Professor in Advanced Antenna
Systems to spend extended time in Lund University for research
- Professor Michael A. Jensen, Brigham Young University, Utah, USA. (Fellow, IEEE)
Current Ph.D. Students/Staff
Current Master Students
Alumni - Past PhD Students
- Dr Vanja Plicanic (2006-2011), industry PhD student with Sony Ericsson Mobile Communications AB. Topic of thesis: "Characterization and Enhancement of Antenna System Performance in Compact MIMO Terminals". Thesis defense held on 14 June 2011.
- Dr Ruiyuan Tian (2007-2011). Topic of thesis: "Design and Evaluation of Compact Multi-antennas for Efficient MIMO Communications". Thesis defense held on 29 November 2011.
Alumni - Past Master Students
- Mr Ehsan Foroozanfard, "Design and evaluation of MIMO terminal antennas with adaptive matching in realistic user scenarios," completed Nov. 2012.
- Mr Zhi Chai, performed at Ericsson AB, Linköping, "Network energy efficiency in LTE through antenna muting," completed Sep. 2012.
- Mr Bangguo Zhu and Ms. Zhang Zheng, in cooperation with Sony Mobile Communications AB, "OTA measurements and performance optimization of mobile terminals for user scenarios," completed Sep. 2012.
- Mr Russell Whiton and Ms Farzanehsadat Firouzabad, in cooperation with Sony Mobile Communications AB, "Co-located antenna design in a mobile phone," completed Jun. 2012.
- Ms Ningxin Chen, in cooperation with Ericsson Research, Ericsson AB, "Multi-sector cooperation in multi-user MIMO for a measured urban macro-cellular environment," completed Mar. 2012.
- Mr Bo Wu, in cooperation with Ericsson Research, Ericsson AB, "Polarization and multi-sector cooperative MIMO in a measured urban macrocellular environment," completed Jun. 2011. A journal paper, which is partly based on this work, has been published.
- Mr Jonas Långbacka, in cooperation with Sony Ericsson Mobile Communications AB, "Design and evaluation of a dielectric multi-mode antenna array for MIMO applications," completed May 2011. Some initial results were published as a conference paper.
- Ms Shengyan Yan, performed at the Vodafone Chair of the Technical University of Dresden, Germany, "Analysis of Uplink Multi-Cell Closed Loop Power Control with Imperfect Channel Knowledge," completed Mar. 2011.
- Mr Mikael Håkansson, in cooperation with Sony Ericsson Mobile Communications AB, "Decoupling Techniques for a Multi-Band MIMO Antenna System," completed Nov. 2010.
- Mr Peng Li, "Antenna-Channel Interactions in On-Body Communications," completed May 2010.
- Ms Xiang Gao and Ms Xiaoguang Wang, in cooperation with Sony Ericsson Mobile Communications AB, "OTA Performance Evaluation of MIMO Terminals with Multipath Simulator," completed May 2010. Some results have been published as an international conference paper.
- Mr Muhammad Ali Khan and Mr Salman Hussain Changazi, "Robust On-Body MIMO Communications," completed May 2009.
- Ms Meifang Zhu, in cooperation with Sony Ericsson Mobile Communications AB, "On optimal IEEE802.11n Schemes for Maximum Throughput Performance of Four 6×6 MIMO Antenna Configurations in Measured Indoor Office Environments," completed Apr 2009.
Some results have been published as an international conference paper.
- Mr Johannes Westström and Ms Victoria Olsson, in cooperation with Perlos AB, "Studies of Diversity Performance in Mobile Terminals," completed Jun. 2007. (Co-supervised with Prof Anders Karlsson)
- Mr Johan Avendal, in cooperation with Sony Ericsson Mobile Communications AB, "Multiband Diversity Antennas," completed Jan 2007. Some results have been published as an international conference paper.
- Ms Serene Ow, "Impact of Mutual Coupling on Compact MIMO Systems," completed Mar 2005. Some results have been published as an international conference paper.
Alumni - Staff/Visitors
- Ms Di Su (Jul-Sep. 2012), Visiting PhD student, Beihang University, China, Jul 2012 -Sep 2012
- Mr Shuai Zhang, PhD student from Zhejiang University (Hanzhou,
China) and Royal Institute of Technology (Stockholm, Sweden), Sep
- Ms Hui Li, Visiting PhD student from Zhejiang University (Hanzhou,
China) and Royal Institute of Technology (Stockholm, Sweden), Jan
- Professor Jørgen Bach Andersen, Aalborg University, Denmark as Guest Professor (1 month/year during 2004-2010)
- Mr Yi Tan, Project Assistant for the VINNOVA project "Innovative Multiple Antenna Structures for Compact Mobile Terminals", Jan-Dec 2010.
- Mr Nipun Bansal, Indian Institute of Technology (IIT), Roorkee. Summer intern (Jun-Aug 2008).
- Ms Yuanyuan Fei, University of Edinburgh, UK, Visiting PhD student (Mar - May 2006).