Parametric Modelling and Estimation of Distributed Diffuse Scattering Components of Radio Channels

We introduce an extended data-model for high resolution channel parameter estimation and parametric channel modeling. Other t han the well-known ray-optical based data models which contain only discrete (specular) p opagation paths, we additionally introduce distributed diffuse scattering components. To this end a simple parametric data model of the diffuse scattering distribution in the delay domain is proposed. Furthermore, we develop an estimator for those model parameters and derive their Cramér-Rao lower bound. Finally we discuss implementation related is sues, which arise if the extended channel model is integrated into existing high-resoluti on parameter estimation algorithms (such as ESPRIT, RIMAX, or SAGE) for the estimation of di screte propagation paths. It is demonstrated that also the reliability of high-resolut ion parameter estimation results in channel sounding measurements can be considerably enhan ced.

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