Design and implementation of a software defined HiperLAN/2 physical layer model for simulation purposes

In this Master of Science thesis a simulation model of the HiperLAN/2 physical layer is designed and implemented. The model should provide insight in the demodulation functions that are necessary in HiperLAN/2 and it should be useful for determining channel selection and computational requirements for the software defined radio project at the University of Twente. The model is implemented in Matlab Simulink and uses C++ as descriptive language. Before the transmitted signal reaches the demodulation part in the receiver, it is distorted by the radio channel, noise, interference and the receiver hardware. These effects are modelled and their influence on the system’s performance is determined. A receiver should contain –besides inverse OFDM and subcarrier demodulation– a channel estimator, a frequency offset and phase offset corrector and a symbol window tracker. These functions have been implemented in the HiperLAN/2 receiver model and experiments have been done. The performance of the simulation model on an additive white Gaussian noise channel did match the theoretical expected performance within 0.1 dB. Simulations also showed that good demodulation can take place with 32-bit fixed point numbers. The frequency offset and phase offset corrector showed that they can correct distortions within 1 dB of the expected performance.