Metod och anordningar för att simulera kommunikationssystem

摘要

A method and means for speeding up simulation in a communication system use Importance Sampling (IS) involving fitted stochastic processes that are artificially altered and fed to the system as inputs in order to shorten the time between so called rare events. The simulation needs to be compensated for the alteration so that the simulation remains unbiased. The problem of finding optimal alternations can be reduced to find optimal bias parameters for the stochastic processes. Here an Artificial Neural Network (ANN) together with a Statistical Bias Optimizer is used in a first phase where the ANN is trained with input parameters and their corresponding optimal output bias parameters. In an application phase, only the trained ANN is used to very quickly provide optimal output samples for the final simulation.