Dual arrays is one potential method in order to achieve the high link capacity and flexibility requirements in 4th Generation Wireless Systems. Herein, an analysis of in-door environment Multiple-Input-Multiple-Output mea-surements in the 5.8 GHz band is performed and the pos-sible increase in capacity, utilizing multiple transmitters and receivers is examined. The investigation shows that in the measured indoor environment, the scattering is suffi-ciently rich to provide substantial link capacity increases. Furthermore, the effect of intra-element element spacing on the channel capacity is studied. Finally the possible HiperLAN/2 MIMO channel capacity, based on the mea-surements, is examined.