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    Fading analysis of vegetation density effects on path loss for 1.8 GHZ cellular mobile with low base station antenna height
    (2006-12-01)
    Phaiboon, Supachai
    ;
    Pitithammawong, Kitti
    ;
    Chulajata, Tatcha
    ;
    Somkuarnpanit, Suripon
    This paper presents studies of propagation characteristics in a suburban forest based on a measurement campaign at a frequency of 1.8 GHz. We investigated how tree density affected the fast fading characteristic depending on tree density and base station antenna height in a range of 3, 4, and 5 m above ground while the receiving antenna height was fixed at 1.8 m above ground. Three categories were studied: high density area, low density areas and grass area. Measurement of the receiver signal over 120 s intervals for a stationary mobile were used to obtain the distribution functions for the fading. We found that the distributions followed a Rician distribution, whose K-factor depended on tree density and transmitter height.
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    Blocking probability of the reverse link cellular CDMA system
    (2002-01-01)
    Kumpairee, C.
    ;
    Kimpan, C.
    ;
    Pin-Ngern, O.
    ;
    Hemmakorn, N.
    ;
    Noppanakeepong, S.
    The blocking probability of the reverse link cellular CDMA system is presented. Gaussian and lognormal approximation are the methods for determination of blocking probability. In the analysis in this paper, the parameter for the number of resolvable paths over a Rayleigh multipath fading channel is presented. In addition, we also show the effect of power control errors.
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    Effect of multipath fading on the Erlang capacity of imperfect power control in cellular CDMA system
    (2002-01-01)
    Omsin, S.
    ;
    Manyanon, A.
    ;
    Kimpan, C.
    ;
    Pin-Ngern, O.
    ;
    Noppanakeepong, S.
    This paper presents an approach to the evaluation of the reverse link capacity of a cellular CDMA system, which is based on using Gaussian and lognormal approximations. We include the fading channel multipath intensity profile (MIP) shape factor in the Erlang capacity formula. Imperfect power control and Rayleigh multipath fading channels are considered.