Research On Geometry-Based Stochastic MIMO Radio Channel Models And Simulations

Multiple-Input Multiple-Output (MIMO) technology has become the most important technology in mobile communications, by improving systen capacity greatly without increasing transmission power, and relieves the congestion of spectrum resources. However, it is not enough only rely on MIMO technology, but also on the understanding of MIMO channel characteristics in improving communication system capacity. On the other hand, a variety of key technologies and processing algorithms require much MIMO channel modeling, in order to simulate the corresponding channel charatceristics, and evaluate the performances of various algorithms and system feasibilities.In this work, the WINNER and COST2100 channel models and characteristics are investigaed. WINNER and COST2100 channel models are geometry based statistical models, and are the most important models for MIMO simulations in the fourth generation (4G) systems. WINNER model has been applied in global 4G channel simulation. The COST2100 model has different physical mechanisms, has being become the hot spot in research and system development. However, there is almost no work available for the comparative studies and performance evaluations between the two models for a specific scenario in open literature. This paper focuses on the WINNER and COST2100 channel characteristic simulations, based on indoor channel measurements for both line-of-sight (LOS) and non-line-of-sight (NLOS) scenarios. Specifically, the two channel characteristics of power-delay-profile (PDP), Ricean factor, rms delay, angular spread and capacity are simulated and compared, for verifying the effectiveness and validity of the two channel models in practical applications.WINNER model has been widely used and operated in the 2-5 GHz band. For millimeter-waves there is still no accepted model globally. In this article, the WINNER platform is applied for the 60 GHz millimeter band. Specifically, the statistical characteristics are extracted and analyzed based on 60 GHz experimental indoor channel measurements when using the WINNER channel model. The experimental data were processed to obtain its characteristic parameter curves. Further, the test and WINNER model simulation results are compared. Results show that WINNER model can be widely used in millimeter-wave frequency band for future wireless communication systems.