Existing wireless links using a single antenna element at the transmitter and receiver are heavily influenced by the multipath scattering arising from objects in the transmission environment. Unlike conventional systems, a concept referred to as Multiple-Input Multiple-Output or MIMO not only thrives under multipath conditions but also has the potential to allow for substantial increases in capacity. MIMO systems use a combination of multiple antenna arrays at the transmitter and receiver in conjunction with dedicated Digital Signal Processing (DSP). Before MIMO systems are designed and deployed, a database of typical propagation measurements is required to confirm theoretical predictions with reality. The design, development and use of specialised measurement equipment to accurately establish an indoor MIMO measurement database is presented in this thesis.