期刊名称：African Journal of Information & Communication Technology
印刷版ISSN：1449-2679
出版年度：2008
卷号：4
期号：3
DOI：10.5130/ajict.v4i3.752
语种：English
出版社：University of Technology, Sydney
摘要：In this paper, we provide a unified analysis for wireless system over cascaded fading channels modeled either by cascaded Nakagami-m or Weibull fading models. These cascade fading models are developed by the product of independent Nakagami-m or Weibull random variables, which are not necessary identically distributed. The performance measures such as amount of fading, average bit error rate, and signal outage are computed in this analysis. We first use the Padé approximation (PA) technique to find simple to evaluate rational expressions for the moment generating function (MGF) of output signal-to-noise ratio (SNR), unlike previously derived intricate expressions in terms of MeijerG function for cascaded Nakagami-m fading channel. Rational expressions for the MGF of the cascaded Weibull random variable are also computed to provide new set of performance results. Using these rational expressions, we analyze the performance of wireless receivers under a range of representative channel fading conditions using both cascaded fading models. To verify the correctness of the proposed rational expression formulation numerical and computer simulations has been done, which shows perfect match.
关键词：Keyhole Channels; Multiple-Input Multiple-output; Nakagami-m distribution; Weibull Distribution; Outage probability; Bit error probability
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