The question is
In this problem we will explore the impact of different log-normal shadowing parameters on outage probability.Consider a a cellular system where the received signal power is distributed according to a log-normal
distribution with mean
μ dBm and standard deviation σψ dBm. Assume thereceived signal power must beabove 10 dBm for acceptable performance.
(a) What is the outage probability when the log-normal distribution has μψ = 15 dBm and σψ = 8dBm?
(b) For σψ = 4dBm, what value of μψ is required such that the outage probability is less than 1%, a typical
value for high-quality PCS systems?