H. . N. Abdullah and A. . Abd Radhi, “Performance of Quadrature OFDM System in Rayleigh Fading Channels”, J. eng. sustain. dev., vol. 15, no. 2, pp. 31–44, Jun. 2011, Accessed: Jun. 13, 2026. [Online]. Available: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1384