MIMO CHANNEL SOUNDING AND DOUBLE-DIRECTIONAL MODELLING

In this paper a parametric measurement approach for double-directional modelling of radio channels is introduced. It is based on broadband real-time MIMO (multiple-input multiple-output) channel sounding measurements which use mul-tiple antennas at both the transmitter and the receiver site. A subsequent super-resolution estimation step determines the polarisation resolved path weights, time-delay, Doppler shift and the propagation directions of the significant paths at both ends of the wireless link simultaneously. From the estimated parameter sets a local reconstruction of the multidi-mensional wave field in the vicinity of the measured aperture volume of time, frequency and space is possible. This way, the measurement antenna properties can be excluded from the channel. As a result, the influence of a variety of application specific array architectures can be investigated with the reconstructed wave field. This builds the basis for a manifold of analyses and simulations of MIMO transmission links in a very realistic way