A New Approximate Closed-Form Distribution and Performance Analysis of a Composite Weibull/Log-Normal Fading Channel |
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Authors: | Rupender Singh Sanjay Kumar Soni Ram Shringar Raw Sandeep Kumar |
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Affiliation: | 1.Department of Electronics and Communication,Delhi Technological University,Delhi,India;2.Department of Electronics and Communication,G. B. Pant Engineering College,Pauri,India;3.Ambedkar Institute of Advanced Communication Technologies and Research,Delhi,India |
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Abstract: | The presence of both the fading and shadowing effects (also called composite multipath/shadowed fading) is often encountered in a realistic radio propagation scenario, thus, making it necessary to consider the simultaneous effect of fading and shadowing on the received signal. The multipath effect is captured using models such as Rician, Nakagami-m, Weibull distribution and shadowing effect is modeled using Log-normal distribution. In this paper we present the closed-form expression of composite (Weibull/log-normal shadowed) fading using the efficient tool proposed by Holtzman. Using this result, the closed-form expression of combined (time-shared) shadowed/unshadowed fading is presented. The performance measures of fading communication systems such as probability density function of signal to noise ratio, amount of fading, outage probability (Pout) and channel capacity are analyzed and expressed in closed form. |
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