Comparison of MIMO channel characteristics computed by 3D ray tracing and statistical models

Abstract

Future wireless communication systems are expected to offer highly reliable broadband radio access in order to meet the increasing demands of emerging high speed data and multimedia services. In recent years information theoretic investigations have shown that multiple-input multiple-output (MIMO) systems can support extremely high data rates within rich scattering environments. To design high efficient MIMO wireless systems and predict system performance under various circumstances accurate MIMO wireless channel models for different scenarios are required. Recently, standardized double directional stochastic MIMO channel models have been proposed for different scenarios based on the statistical information evaluated from measured data. In this paper the MIMO channel characteristics have been evaluated by using deterministic channel modelling and compared with the standardized spatial channel model (SCM) in urban micro-cell scenario for non line of sight condition. A three dimensional ray tracing package has been utilized for deterministic channel modelling. The most crucial parameters of the spatial channel, such as delay spread and angular spreads at both base and mobile stations have been considered in the comparison. (5 pages)