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The dependence of indoor radio channel multipath characteristics of transmit/receiver ranges

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5 Author(s)
R. J. C. Bultitude ; Commun. Res. Centre, Ottawa, Ont., Canada ; P. Melancon ; H. Zaghloul ; G. Morrison
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The authors report experimental and modeling studies that investigate the dependence of indoor radio channel multipath characteristics on a transmit/receive range. Specifically, a simple model for estimation of the complex baseband equivalent impulse response for indoor channels is explained. Using this model, the relationship between RMS delay spread and range on static indoor channels is estimated. Results show that this relationship is nonmonotonic and has a maximum at a range that depends on the building dimensions and the electrical properties of reflecting surfaces. The model is used in infinite, as well as finite, resolution modes to supplement the measurements of impulse response characteristics in different buildings using a limited resolution channel sounder. Experimental and modeling results are combined to derive conclusions that confirm the anticipated nonmonotonic relationship exists in empty buildings. Measurement results demonstrate that furniture has the effect of destroying this relationship, making RMS delay spread almost independent of range

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IEEE Journal on Selected Areas in Communications  (Volume:11 ,  Issue: 7 )