Hui Li
Professor Supervisor of Doctorate Candidates Supervisor of Master's Candidates
Main positions:信息与通信工程学院副院长
Gender:Female
Alma Mater:Royal Institute of Technology
Degree:Doctoral Degree
School/Department:School of Information and Communication Engineering
Discipline:Communication and Information Systems. Electromagnetic Field and Microwave Technology
Business Address:No. 2, Linggong Road, Dalian University of Technology, Dalian, Liaoning Province; 116024
Contact Information:hui.li@dlut.edu.cn
E-Mail:hui.li@dlut.edu.cn
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Indexed by:期刊论文
Date of Publication:2018-11-01
Journal:IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Included Journals:SCIE、Scopus
Volume:66
Issue:11
Page Number:6457-6462
ISSN No.:0018-926X
Key Words:Compact antenna array; direction finding; direction of arrival (DOA) estimation; multiple input multiple output (MIMO) antenna system; multiple signal classification (MuSiC)
Abstract:Accurate direction of arrival (DOA) estimation in compact terminal devices using small antenna arrays is challenging due to their limited radiating apertures. In this communication, we employ both the amplitude and the phase information to improve the estimation accuracy and eliminate phase ambiguity without increasing the size of the antenna array. The optimal amplitude ratio between the antenna patterns is theoretically studied using the theories of the Fisher information, Cramer-Rao bound, and ambiguity function. Criteria of proper amplitude ratio are summarized from the theoretical investigations. Following the guidelines, two antenna arrays are modified to build effective antenna patterns and improve the estimation accuracy. Specifically, the compact monopole-patch array and the dual-monopole array reduce the DOA estimation errors by over 60% and 20%-40%, respectively, under a medium SNR of 10 dB. The phase ambiguity has been eliminated in both arrays as well. The monopole-patch array requires phase calibration in the measurement, whereas the dual-monopole array does not. Experiments were carried out for the dual-monopole array in the anechoic chamber, achieving the estimation accuracy of 0.67 degrees averaged over 360 degrees.
Hui Li was born in Heilongjiang province, China. She received the B.E. degree in optical engineering from Tianjin University (TJU), China, in 2007 and Ph.D degree in electrical engineering from the Royal Institute of Technology (KTH), Sweden, in 2012. She is currently an associate professor at Dalian University of Technology. Research Interests:Multiple input multiple output systems, millimeter wave antenna, implantable antnena, RFID, theory of characteristic mode and etc.
