DocumentCode :
938648
Title :
A measurement-based model for predicting coverage areas of urban microcells
Author :
Goldsmith, Andrea J. ; Greenstein, Larry J.
Author_Institution :
California Univ., Berkeley, CA, USA
Volume :
11
Issue :
7
fYear :
1993
fDate :
9/1/1993 12:00:00 AM
Firstpage :
1013
Lastpage :
1023
Abstract :
The authors have performed data reductions on 900 MHz signal attenuations measured on numerous streets in Manhattan. The database consists of both local spatial averages of signal attenuation and the short-term fluctuations about this average. The former, which is termed the local mean attenuation (LMA), is the primary focus. The database is used to obtain contours of constant LMA for two neighborhoods. It is shown that the contours have the shapes of convex diamonds. The authors propose that squares inscribed within these contours be used as the building blocks of microcellular environments. A theory is developed that explains the contours and predicts, with reasonable accuracy, the sizes of the inscribed squares. It is also shown that the prediction method can be applied without the need for measured data. The short-term fluctuation statistics of the signal attenuation are examined. They are shown to be Rayleigh-like in the non-line-of-sight regions of a microcell and Rice-like in the line-of-sight region. Possible extensions to other frequency bands and other urban environments are discussed
Keywords :
cellular radio; fading; radiowave propagation; 900 MHz; Manhattan; Rayleigh fading; Rician fading; UHF; contours; coverage areas; local mean attenuation; local spatial averages; measurement-based model; prediction method; short-term fluctuations; signal attenuation; signal attenuations; urban microcells; Accuracy; Area measurement; Attenuation measurement; Fluctuations; Performance evaluation; Prediction methods; Predictive models; Shape; Spatial databases; Statistics;
fLanguage :
English
Journal_Title :
Selected Areas in Communications, IEEE Journal on
Publisher :
ieee
ISSN :
0733-8716
Type :
jour
DOI :
10.1109/49.233214
Filename :
233214
Link To Document :
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