TY - JOUR
T1 - On the Efficient Simulation of Outage Probability in a Log-normal Fading Environment
AU - Rached, Nadhir B.
AU - Kammoun, Abla
AU - Alouini, Mohamed-Slim
AU - Tempone, Raul
N1 - KAUST Repository Item: Exported on 2020-10-01
PY - 2017/2/15
Y1 - 2017/2/15
N2 - The outage probability (OP) of the signal-to-interference-plus-noise ratio (SINR) is an important metric that is used to evaluate the performance of wireless systems. One difficulty toward assessing the OP is that, in realistic scenarios, closed-form expressions cannot be derived. This is for instance the case of the Log-normal environment, 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 does not admit a closed-form expression, it has thus far been evaluated by several approximation techniques, the accuracies of which are not guaranteed in the region of small OPs. For these regions, simulation techniques based on variance reduction algorithms is a good alternative, being quick and highly accurate for estimating rare event probabilities. This constitutes the major motivation behind our work. More specifically, we propose a generalized hybrid importance sampling scheme, based on a combination of a mean shifting and a covariance matrix scaling, to evaluate the OP of the SINR in a Log-normal environment. We further our analysis by providing a detailed study of two particular cases. Finally, the performance of these techniques is performed both theoretically and through various simulation results.
AB - The outage probability (OP) of the signal-to-interference-plus-noise ratio (SINR) is an important metric that is used to evaluate the performance of wireless systems. One difficulty toward assessing the OP is that, in realistic scenarios, closed-form expressions cannot be derived. This is for instance the case of the Log-normal environment, 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 does not admit a closed-form expression, it has thus far been evaluated by several approximation techniques, the accuracies of which are not guaranteed in the region of small OPs. For these regions, simulation techniques based on variance reduction algorithms is a good alternative, being quick and highly accurate for estimating rare event probabilities. This constitutes the major motivation behind our work. More specifically, we propose a generalized hybrid importance sampling scheme, based on a combination of a mean shifting and a covariance matrix scaling, to evaluate the OP of the SINR in a Log-normal environment. We further our analysis by providing a detailed study of two particular cases. Finally, the performance of these techniques is performed both theoretically and through various simulation results.
UR - http://hdl.handle.net/10754/622924
UR - http://ieeexplore.ieee.org/document/7857009/
UR - http://www.scopus.com/inward/record.url?scp=85025700311&partnerID=8YFLogxK
U2 - 10.1109/TCOMM.2017.2669979
DO - 10.1109/TCOMM.2017.2669979
M3 - Article
SN - 0090-6778
VL - 65
SP - 2583
EP - 2593
JO - IEEE Transactions on Communications
JF - IEEE Transactions on Communications
IS - 6
ER -