# 7.3 OFDMA overview

The simulation of <span data-highlighted="true" data-vc="highlighted-text"><span class="_kqswh2mm"><span class="_5pioz8co _189e1dm9 _1il9buyh _19lc184f _d0altlke" data-testid="definition-highlighter">OFDMA</span></span></span> systems is similar to that of the <span data-highlighted="true" data-vc="highlighted-text"><span class="_kqswh2mm"><span class="_5pioz8co _189e1dm9 _1il9buyh _19lc184f _d0altlke" data-testid="definition-highlighter">CDMA</span></span></span> systems, except that after the overall two-tiers cellular system structure (incl. wrap-around) is built and populated with mobiles, <span data-highlighted="true" data-vc="highlighted-text">OFDMA</span> replaces the <span data-highlighted="true" data-vc="highlighted-text">CDMA</span> power tuning process with an iterative process of assigning a variable number of traffic sub-carriers and calculating the overall carried traffic per base station.

The <span data-highlighted="true" data-vc="highlighted-text">OFDMA</span> module has been designed for a Long Term Evolution (LTE) network from 3GPP <span data-highlighted="true" data-vc="highlighted-text"><span class="_kqswh2mm"><span class="_5pioz8co _189e1dm9 _1il9buyh _19lc184f _d0altlke" data-testid="definition-highlighter">TR36</span></span></span>.942 ‎\[10\]. Therefore <span data-highlighted="true" data-vc="highlighted-text"><span class="_kqswh2mm"><span class="_5pioz8co _189e1dm9 _1il9buyh _19lc184f _d0altlke" data-testid="definition-highlighter">E-UTRA</span></span></span> <span data-highlighted="true" data-vc="highlighted-text"><span class="_kqswh2mm"><span class="_5pioz8co _189e1dm9 _1il9buyh _19lc184f _d0altlke" data-testid="definition-highlighter">RF</span></span></span> coexistence studies can be performed with Monte-Carlo simulation methodology.