Kegen Yu received the Ph.D. degree in electrical engineering from The University of Sydney, Australia, in 2003. He was with the Jiangxi Geological and Mineral Bureau, Nanchang, China; Nanchang University, Nanchang; the University of Oulu, Oulu, Finland; the CSIRO ICT Center, Sydney; Macquarie University, Sydney; the University of New South Wales, Sydney; and Wuhan University, Wuhan, China. He is currently a Professor with China University of Mining and Technology, Xuzhou, China. He has coauthored the book Ground-Based Wireless Positioning (Wiley and IEEE Press, 2009) and another book Wireless Positioning: Principles and Practice (Springer, 2018), and has authored the book Theory and Practice of GNSS Reflectometry (Springer, 2021). He has authored or coauthored more than 100 refereed journal articles, including more than 60 IEEE journal articles. His research interests include GNSS-R, wireless positioning, signal processing, and remote sensing. Dr. Yu served on the Editorial Board of EURASIP JASP, IEEE TAES, and IEEE TVT from 2013 to 2017. He is also on the Editorial Board of IEEE ACCESS. He edited the book Positioning and Navigation in Complex Environments (IGI Global, 2018) and another book Indoor Positioning and Navigation (Science Press, 2018). He was the Lead Guest Editor of a Special Issue of Physical Communication, EURASIP JASP, Remote Sensing, and IEEE ACCESS. He is also the Lead Guest Editor of a Special Section of IEEE TAES (open for submissions soon).