OFDM based on FFT decoder with non-integer argument

Due to its efficient use of the spectral band and also to its immunity to selective fading, Orthogonal Frequency Division Multiplexing (OFDM) modulation was adopted by many of the wireless technologies of today. However resilient this modulation technique is to Inter Symbol Interference (ISI) or Inter Carrier Interference (ICI), the errors determined by this interference mechanism are significant. The present paper proposes the development of a new OFDM decoding algorithm which can demodulate data in severe ISI or ICI conditions. It is based on use of oversampling in frequency technique, performed by a Discrete Fourier Transform (DFT) with non-integer argument. The obtained results are reported against the standard ones.