C. X. Xavier, H. Abedi, J. Boger, P. Morita, A. Wong, and G. Shaker, “2D-Multiple Signal Processing Approach to Human Orientation Monitoring Using Millimeter-wave FMCW Radar”, J. Comp. Vis. Imag. Sys., vol. 5, no. 1, p. 2, Jan. 2020.