Norwegian University of Science and Technology ( NTNU ) Communication & Coding Theory for Wireless Channels , October 2002 Problem Set

نویسنده

  • Mohamed-Slim Alouini
چکیده

Let XdB be a normal random variable (RV) with mean mXdB and variance σ 2 XdB and let X = 10XdB/10 be the corresponding log-normal RV. (a) Express the mean of X in terms of mXdB and σ 2 XdB . (b) Express the variance of X in terms of mXdB and σ 2 XdB . (c) Express the median of X in terms of mXdB . Based on that, can you now explain why the area mean is sometimes referred to as the median link gain or median path loss.

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تاریخ انتشار 2002