MIMO measurements at 300 MHz- measurement system and analysis

An advanced multiple-input multiple-output (MIMO) radio channel sounder has quite recently been acquired by Lund University. With some support from FOI, the equipment was obtained with an additional frequency band at about 300 MHz. This frequency range is important for mobile military tactical networks and emergency communications. Both the measurement system and the channel parameters of interest differ from traditional channel measurements. In this report the measurement system is described and the measurement procedure is presented. In the 300 MHz band, a vertically polarized, circular antenna array with 8 dipole elements is used at both link ends. The antennas are a critical part of the measurement system, and the calibration measurements performed are presented in the report. The analysis of measured data includes extraction of channel parameters with high-resolution algorithms (e.g. SAGE), identification of propagation mechanisms, and calculation of channel capacities. Also, a measurement campaign performed in Linköping is described, and finally, some examples of the results obtained from these measurements are presented.