H. Hussein A, M. Salem N, E. Nasr M, M. Selim M. BER and Capacity/Spectral Efficiency Enhancement of MIMO Systems Using Digital Antenna Arrays Beamforming. ASRJETS-Journal. 2021;76(1):218-238. Accessed September 15, 2025. https://asrjetsjournal.org/American_Scientific_Journal/article/view/6661