# Introduction

5 panels characterised the positioning of a cellular system. This panel is the same whether a <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> (<span data-highlighted="true" data-vc="highlighted-text"><span class="_kqswh2mm"><span class="_5pioz8co _189e1dm9 _1il9buyh _19lc184f _d0altlke" data-testid="definition-highlighter">UL</span></span></span>/DL) or <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> (<span data-highlighted="true" data-vc="highlighted-text">UL</span>/DL) is simulated.

[![image.png](https://wiki.cept.org/uploads/images/gallery/2026-04/scaled-1680-/VdQLXnkAxsI7rs5T-image.png)](https://wiki.cept.org/uploads/images/gallery/2026-04/VdQLXnkAxsI7rs5T-image.png)