Microsoft Word - eigenmodel_paper_ArXiV_FINAL

A novel stochastic technique is presented to directly model singular vectors and singular values of a multiple input multiple output (MIMO) channel. Thus the components modeled directly in the eigen domain can be adapted to exhibit realistic physical domain behavior when assembled. The model exploits natural paths of eigenmodes, such that a simple Doppler filter generator process can be used. Furthermore, it is possible to directly manipulate the singular vector dynamics in a way that an unrealistic “stress channel” can be modeled in the eigen domain. This is particularly useful for testing the eigenmode channel tracking ability internal to a communication device such as a modem, where impairments in tracking will cause interference between eigenmodes. The model can also facilitate mode tracking testing, as it directly produces tracked (untangled) eigenmodes, providing the narrowest possible singular vector Doppler spectra and consequently lowest required update rates of each eigenmode. This singular vector based model targets testing of the eigen domain functionality of MIMO modems/devices (i.e. an apparatus focus) without the need for including the decomposition stages.