Influence of Extraction Procedures on Estimated Wideband MIMO Channel Parameters

Properties of radio-channels were quantified through appropriate measures to enable comparison between different realizations or to get suitable model representation. In past such measures are established for wideband SISO channels as well as for narrowband MIMO channels. Due to lack of joint measures, radio-channels being both wideband and MIMO are still characterized separately with wideband and MIMO measures. Since original (wideband or MIMO) measures do not account for additional dimensions of measured data, they become ambiguous. As a consequence, obtained parameters could not be compared without complete knowledge about employed processing sequences. This paper illustrates non-uniqueness of subspace-defined measures in context of WINNER wideband MIMO channel model parameterization.