M. C. Caballé, A. C. Augé, E. Lopez-Aguilera, E. Garcia-Villegas, I. Demirkol and J. P. Aspas, "An Alternative to IEEE 802.11ba: Wake-Up Radio With Legacy IEEE 802.11 Transmitters," in IEEE Access, vol. 7, pp. 48068-48086, 2019, doi: 10.1109/ACCESS.2019.2909847.