1 Krzysztof Bakowski Krzysztof Wesolowski Marcin Rodziewicz Poznan University of Technology Poznan, Poland Simulation Tools for the Evaluation of Radio Interface Technologies for IMT-Advanced and Beyond 1. Introduction In the last forty years, simulation has become a powerful tool in the modeling and construction of several types of digital communication systems. Simulation has also become an important and obligatory topic of university courses in communications. Several books have been devoted to specific simulation methods used in communications. Jeruchim, Balaban and Shanmugan [1] published their bestselling classic on the simulation of communication systems presenting a wide selection of topics related to the modeling of linear and nonlinear communication systems, simulation of randomness which is an inherent feature of communications, and showing methods of effective simulation time shortening. The book by Gardner and Baker [2] is also devoted to simulation techniques and the models of communication systems and processes. The book by Tranter, Shanmugan, Rappaport and Kosbar [3] is devoted to similar issues. Their authors applied MATLAB ® to model illustrating examples of the simulation of communication systems with wireless applications. All books mentioned so far are related to the simulation of the physical layer in communication systems. It means that they focus on explaining the so-called link level simulation methods in which such processes as data generation, data source and channel encoding, waveform and noise generation and filtration, digital modulations, signal propagation over a transmission channel, signal distortion and reception (demodulation, filtration, detection, channel decoding, etc.) are elaborated. As in digital communication systems, their main performance criteria are bit, symbol or data block error rates, and their estimators are inherent blocks of the simulated system.