“Channel Estimation in BPSK-QPSK-PSK 16 & 64 QAM MIMO-OFDM System”, Int. J. Curr. Eng. Technol., vol. 4, no. 4, pp. 2346–2348, Aug. 2014, Accessed: Apr. 10, 2026. [Online]. Available: https://ijcet.evegenis.org/index.php/ijcet/article/view/1038