B. Prasetya, A. Kurniawan, .-. Iskandar, and A. Fahmi, “Joint Power Loading and Phase Shifting on Signal Constellation for Transmit Power Saving on OFDM/OFDMA Systems”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 8, no. 5, pp. 2039–2045, Oct. 2018.