Simplified Model for Predicting the Power Delay Profile Characteristics of an211 Indoor Radio Propagation Channel. NTIA Report Series

摘要

Multipath channels in indoor wireless communication systems exhibit a211u001echaracteristic power delay profile, which can be a detriment to system 211u001eperformance. In this paper, the authors present a simplified model for 211u001ecalculating the decay rate of the power delay profile for propagation within 211u001erooms. This simplified model provides a time-efficient means of predicting system 211u001eperformance. Predictions of this indoor power delay profile (IPDP) model are 211u001ecompared to results obtained from a finite-difference time-domain (FDTD) model. 211u001eAdditionally, comparisons of the IPDP model to measured data are presented. The 211u001erms delay spread is the second central moment of the power delay profile of a 211u001epropagation channel and is a measure of the communication link degradation due to 211u001emultipath. The authors also show results of the estimated rms delay spread from 211u001ethis model and show comparisons to the measured data. This IPDP model can be used 211u001eto investigate the effects of variable room size and properties of the surfaces 211u001e(or walls) on the decay characteristics of the power delay profile.