On multiple-input–multiple-output performance for Terrestrial Trunked Radio systems

Measurements for outdoor multiple-input-multiple-output (MIMO) capacity assessment are generally technically complicated, time consuming and expensive activities and few results are therefore published in the literature. Terrestrial Trunked Radio (TETRA) systems suffer from poor capacity and could be significantly improved by MIMO technology. However, performing outdoor channel measurements in relevant environments is very difficult because of interference problems with operating systems. In this study, the authors propose an estimation of the MIMO capacity for TETRA systems, based on outdoor MIMO measurements carried out at 300 MHz.