摘要：The sensor position uncertainties and synchronization offsets can cause substantial performance degradation if the sensors are not properly calibrated. This paper investigates the localization of a constant velocity moving target and the self-calibration of sensors using a sequence of range and azimuth measurements observed at successive instants. A theoretical study by the Cramer-Rao Lower Bound (CRLB) reveals that the sensor positions can only be self-calibrated when there are at least two sensors and synchronization offsets can be handled by joint estimation. A low complexity sequential closed-form solution is proposed to estimate the target position and velocity first, and the coordinates of each sensor and synchronization offset afterward. While less intuitive, the analysis shows that the closed-form solutions for both the target and sensor parameters can reach the CRLB accuracy under small Gaussian noise. We also develop a semidefinite programming (SDP) solution by semidefinite relaxation (SDR) for joint localization and calibration from the Maximum Likelihood formulation, which exhibits higher noise tolerance than the closed-form solution. Simulations validate the analysis and the performance of the proposed methods.
主讲人：Dominic K. C. Ho, Professor, University of Missouri, USA
Dr. Ho was born in Hong Kong. He received the BSc degree with First Class Honors and the PhD degree in Electronic Engineering, both from the Chinese University of Hong Kong. He was a research associate at the Royal Military College of Canada, a member of scientific staff at the Bell-Northern Research, and a faculty at the University of Saskatchewan, Canada. Since 1997, he has been with the University of Missouri, where he is a professor in the Electrical Engineering and Computer Science Department. His research interests are in sensor array processing, source localization, subsurface object detection, and wireless communications. Dr. Ho has been active in the International Telecommunications Union (ITU) standard developments between 1995 and 2012. He was the rapporteur of one recommendation and the editor of several others. Dr. Ho was an Associate Editor of the IEEE Transactions of Signal Processing (2003-2006, 2009-2013) and the IEEE Signal Processing Letters (2004-2008). He served as the Chair of the IEEE Sensor Array Multichannel (SAM) Technical Committee from 2013 to 2014 and the Past Chair in 2015. He was Technical Co-Chair of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) held in Shanghai, in 2016. He is an inventor of over 40 patents on geolocation and signal processing for wireless communications. Dr. Ho is a fellow of the IEEE.
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