K. Al-Azawi, Maher, Maha George Zia, and Amal M. Noori. 2006. “Fast and Multicarriar Frequency Hopping Signals OverFrequency Selective Rayleigh Fading Channel”. Journal of Engineering and Sustainable Development 10 (3): 47-59. https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1787.