Abstract
Condensed parameters are used for a concisedescription of wideband mobile radio channelmeasurements. The most popular are the delay spread, thecoherence bandwidth, and the delay window. In thispaper, we analyze their definitions, interrelations,and applicability under various circumstances.Similarily, we analyze condensed parameters in theDoppler frequency domain. There are importantdifferences between instantaneous and averaged parameters,and we discuss the meaning of them. We show thatergodicity and WSSUS (wide-sense stationary uncorrelatedscattering) are required so that averageparameters can be defined. For overspread channels, delayspread and coherence bandwidth can be defined, but theyare not meaningful. We demonstrate that the“classical” descriptions, namely delayspread and coherence bandwidth, do not allow a system independentcharacterization of the channel, and we propose a set ofwindow parameters instead. Their meaning for channelcharacterization and system simulation isinvestigated.
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