An importance sampling analysis of a sub-carrier synchronized OFDM/QAM
Mohamed Lassaad Ammari, Paul Fortier, T.H. Huynh · 2002
In this paper, we propose an importance sampling (IS) analysis of an OFDM system which employs local equalization. IS is a fast Monte-Carlo simulation technique which aims to reduce the variance of a given simulation estimator (or the number of required simulation samples). The simulated system is a an equalized OFMD model with 512 sub-carriers. The equalizers, using a learning sequence, estimate the frequency response of the channel at each sub-carrier. By applying the IS simulation technique, we have estimated a BER of the order of 10/sup -5/ with only 1000 simulations. The gain in simulation time is exceptional.