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Performance evaluation of Wi‐Fi and WiMAX over OFDM physical layer
Authors:Papa Ndiaga Ba  Joel Rodrigues  Valery Korotaev  Jalal Al‐Muhtadi  Samuel Ouya  Amadou Seidou Maiga
Abstract:Orthogonal frequency division multiplexing (OFDM) is an alternative technology that is constrained to keep up with the increasingly high data transmission rate due to its robustness against selective frequency fading and its resistance to intersymbol interference (ISI). This paper aims to study and optimize its performance, namely, its probability of communication failure and signal‐to‐interference‐plus‐noise ratio (SINR) metrics. The mathematical tool used to perform OFDM evaluation and analysis is the Fourier transform and its properties. The obtained results of those equations led to the demonstration of the probability of communication outage and to notice that the cutoff time occurs after the 10th iteration for values of λ less than or equal to 1. It could also be checked that this period is small if λ exceeds 1 by considering the sensitivity factor. Moreover, for the obtained results, in terms of bit error rate (BER) and SINR, the influence of the modulation on the error vector magnitude (EVM) shows the sensitivity factor Ω presents a key role in the transmission chain.
Keywords:Fourier transform  OFDM  outage probability  physical layer  S‐carrier  Wi‐Fi  WiMAX
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