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Effect of People Moving near Short-Range Indoor Propagation Links at 2.45 GHz
Kara Ali,Bertoni Henry L. The Korea Institute of Information and Commucation 2006 Journal of communications and networks Vol.8 No.3
Measurement results are presented for the effects of people moving near and across short-range indoor propagation links at 2.45 GHz (ISM band). Excess loss due to scattering and blockage by human bodies in the vicinity of one terminal were measured for different radio links in an office environment. Statistics on fades due to human body motion are given. Polarization coupling (depolarization) for various radio links was measured, and correlation of polarization components is discussed as a basis for using polarization diversity reception in short-range indoor systems.
Indoor Propagation Characteristics at 5.2GHz in Home and Office Environments
Chung, Hyun-Kyu,Bertoni, Henry L. The Korea Institute of Information and Commucation 2002 Journal of communications and networks Vol.4 No.3
This paper presents results of continuous wave and swept frequency response measurements over the frequency range of UNII lower and middle bands from 5.15GHz to 5.35GHz in indoor environments. From the continuous wave measurements at 5.2GHz, the excess path loss, and the statistical characteristics of the temporal and spatial fading were found. By sweeping the frequency over the band, envelope correlation as a function of frequency was found and the coherence bandwidth (CBW) was determined from the envelope correlation. Using a channel model, the CBW was used to evaluate RMS delay spread. The dependence of CBW on the antenna polarization was simulated and compared with the measurement results. The influence of room size and separation of transmitter and receiver for LOS paths on RMS delay spread was discussed.