An Efficient Simulation Scheme of the Outage Probability with Co-Channel Interference
byNadhir Ben Rached, Abla Kammoun, Mohamed-Slim Alouini, Raul Tempone
Nadhir Ben Rached, Abla Kammoun, Mohamed-Slim Alouini, and Raul Tempone, An Efficient Simulation Scheme of the Outage Probability with Co-Channel Interference, will be published in the Proceedings of IEEE GLOBECOM 2015
The outage Probability (OP) of the Signal-to-Interference-plus-Noise Ratio (SINR) is an important metric used to evaluate the performance of wireless communication systems operating over fading channels. One major difficulty toward assessing the OP is that, in most of the realistic scenarios, closedform expressions cannot be derived. This is for instance the case of Log-normal fading environments, in which evaluating the OP of the SINR amounts to computing the probability that a sum of correlated Log-normal variates exceeds a given threshold. Since such a probability is not known to admit a closed-form expression, it has thus far been evaluated by several approximation techniques, the accuracies of which are unfortunately not guaranteed in the interesting region of small outage probabilities. For these regions, simulation techniques based on variance reduction algorithms can represent a good alternative, being well-recognized to be quick and highly accurate for estimating rare event probabilities. This constitutes the major motivation behind our work. More specifically, we propose an efficient Importance Sampling (IS) approach which is based on a Covariance Matrix Scaling (CMS) technique and illustrate its computational gain over naive Monte Carlo (MS) simulations through some selected simulation results.
Outage Probabilitysum of correlated LognormalImportance Samplingcomputational gainnaive Monte Carlo simulations