E. Abdul Fatah, S., صفوان, Sami A. Mawjoud, D. and د. 2012. Impact of Downlink Distributed and Adjacent Subcarrier Permutation Modes on the Performance of Mobile WiMAX System in ITU-R Ped. B Channel with Obtaining Optimum Cyclic Prefix. Al-Rafidain Engineering Journal (AREJ). 20, 4 (Aug. 2012), 69–85. DOI:https://doi.org/10.33899/rengj.2012.54157.