List of Articles reza nematollahi Article 1 - Two Efficient Algorithms for Increasing OFDM Performance with Highly Complicated Fading Channel 20.1001.1.25887327.2019.3.3.3.2 Saeed Ghazi-Maghrebi Mohammad Hosein Tavassoli Mohammad Ghazi-Maghrebi Reza Nematollahi Signal Processing and Renewable Energy , Issue 4 , Year , Summer 2019