Development of accurate physical layer models is very important for generatingrealistic network simulation results. Significant effort has been put into setting upphysical layer models for wireless channels that emulate the impact of the channel onthe higher layers of the network. Setting up the models is especially difficult for afrequency selective channel. In this thesis the use of non-linear functions to convertthe frequency selective channel to an equivalent flat fading channel is examined. Theanalytical expressions for the statistics of the equivalent flat fading process that areneeded to set up the physical layer models are derived. These results are used to setup the physical layer model for the frequency selective channel. Extensive simulationsare performed to verify the accuracy of the model against a detailed physical layerimplementation. The statistics of the model and the actual channel are seen to match,validating the method of setting up the models.
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