Condensed parameters are used for a concise description ofwideband mobile radio channel measurements. The most popular are thedelay sprad, the coherence bandwith, and the delay window. In thispaper, we analyze their definitions, interrelations and applicabilityunder various circumstances. Similarily, we analyze condensedparameters in the Doppler frequency domain. There are importantdifferences between instantaneous and averaged parameters, and wediscuss the meaning of them. We show that ergodicity and WSSUS(wide-sense stationary uncorrlated scattering) are required so thataverage parameters can be defined. For overspread channels, delayspread and coherence bandwith can be defined, but they are notmeaningful. We demonstrate that the "classical" descriptions, namelydelay spread and coherence bandwidth, do not allow asystem-independent characterization of the channel, and we propose aset of window parameters instead. Their meaning for channelcharacterization and system simulation is investigated.
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