Search for: [Description = "The realistic wireless channels face combined \(time shared\) Nakagami\-lognormal shadowing and unshadowing fading because of time varying nature of radio channel and mobile user. These channels can be modeled as time\-shared sum of multipath\-shadowing and unshadowing Rician distributions. These fading create severe problems in long distance wireless systems where multipath fading is superimposed on shadowing fading \(called multipath\-shadowing fading\). The multipath effect can be modeled using Rayleigh, Rician, Nakagami\-m or Weibull distribution and shadowing effect is modeled using lognormal distribution. In this paper, authors present a new closed\-form probability distribution function of a Nakagami\-lognormal fading channel. Using this result, the closed\-form expression of combined Nakagamilognormal shadowing and unshadowing fading is presented. The obtained closed\-form result facilitates to derive the important performance metrics of a communication system such as amount of fading, outage probability, and average channel capacity in closed\-form expressions."]