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Abstruct-In this paper, we present a performance analysis of OFDMA based cellular systems with dynamic packet assignment (DPA). Most approaches in the current literature to analyze wireless data networks do not take into account the interference conditions on the radio channel. We propose an analytical model based on a two-dimensional continuous time Markov chain (CTMC), that takes into account, the interference conditions on the OFDMA sub-carriers. We derive expressions for the mean delay anddoi:10.1109/pimrc.2004.1368744 dblp:conf/pimrc/JayaparvathyAS04 fatcat:uffbd2o2jjdn5fodkt6azkcmhi