Coverage probability and average rate of downlink user‐centric wireless cellular networks with composite κ–μ shadowed and lognormal shadowed fading

A user‐centric wireless cellular network has recently emerged as a pragmatic network model for better reflecting the traffic demand‐based deployment. To the best of authors' knowledge, however, the coverage probability with composite κ – μ shadowed and lognormal shadowed fading [termed the doubly‐selective (DS) fading] in downlink user‐centric wireless cellular networks is unknown. Most importantly, another significant performance metric, i.e. the average rate, until now has not been investigated. To study the influence of the DS fading on performance metrics and avoid unnecessary handovers caused by the random fluctuation of the lognormal shadowing at the cell‐association phase, this work considers the downlink user‐centric wireless cellular network with the DS fading and the closest cell‐association rule. Furthermore, the closed‐form expressions for the coverage probability and average rate in downlink user‐centric wireless cellular networks are successfully derived. Numerical results demonstrate that the user‐centric wireless cellular network not only provides a high coverage probability but also promotes the average rate compared to the Poisson point process‐based network with independent uniformly distributed users.