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Frequency domain characterization of LoS nonfading indoor wireless LAN channel employing frequency and polarization diversity in the 63.4-65.4 GHz band

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2 Author(s)
Hammoudeh, A. ; Sch. of Electron., Univ. of Glamorgan, Pontypridd, UK ; Scammell, D.A.

This paper presents results of frequency domain measurements conducted to characterize the distortionless transmission bandwidth (DTB) of indoor nonfading channels employing vertically and horizontally polarized antennas in the frequency band 63.4-65.4 GHz. The mean delay spread (τmean), root mean square (rms) delay spread (τrms), and the DTB of the channel are also presented as functions of distance between terminals and are compared for both polarizations. The dependence of DTB on the separation between terminals d is modeled as DTB=kd-n where k is a constant. τmean increases linearly with d, and its relationship with DTB is characterized as DTB=(1/ατmeann)+c, where α and c are constants. The effectiveness of frequency and polarization diversity in mitigating the effects of multipath fading in indoor channels has also been evaluated. The performance of both diversity techniques when modulated signals with high data rates for multimedia applications are utilized is presented for maximum selection combining. The performance of frequency diversity is also shown as a function of frequency separation between diversity branch signals to determine whether an optimal frequency separation exists.

Published in:

Vehicular Technology, IEEE Transactions on  (Volume:53 ,  Issue: 4 )

Date of Publication:

July 2004

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