Capacity Optimization and Modeling of Frequency SelectiveWLAN Indoor MIMO Channels Based on Measured Data

Motivated by channel measurements in different indoor locations we will show that the WLAN indoor MIMO channel is characterized by few dominant transmission paths mainly corresponding to the LOS path and some strong reflections. In the contrary to the common statistical flat Rayleigh fading channel model we will explain that the WLAN channel is widely deterministic and frequency selective. Furthermore we calculate the channel capacity from the measured data and we show its dependence on the geometrical arrangement of the transmit and receive antennas and the characteristics of the location. Here strong variations are observed and therefore we present some promising approaches that could be valid to reduce these capacity variations and enhance the overall capacity.