Coverage Probability Analysis of Heterogeneous Cellular Networks in Rician/Rayleigh Fading Environments

This letter analyzes the coverage probability performance of heterogeneous cellular network (HCN) in a Rician/Rayleigh fading environment. First, an exponential-series approximation, potentially converging to the exact value and with reduced computational complexity, is proposed for the desired signal power statistics under Rician fading. Then, an analytical approach for evaluating the coverage probability of HCNs under Rician fading for desired signal and Rayleigh fading for interfering signals is presented and verified through simulation. Numerical results demonstrate considerable improvement in coverage probability when the desired signal is Rician faded, compared to that obtained when it is Rayleigh faded.