K.K. Chai, K.K. Loo, T. Alukaidey, and S.A. Jimaa (UK), and K. Salman (USA)
OFDM, FFT, Modulation, IEEE 802.11, SHARC
The demand of the growing number of customers and data rate have push the future mobile communication frequency band into parts of the millimeter wave band, especially 60GHz band which is the unlicensed band. The Orthogonal Frequency Division Multiplexing (OFDM) modulation has particular interest in future mobile communication. This is because of its high bandwidth efficiency as the use of orthogonal waveforms with overlapping spectra. The complexity of an OFDM system is highly depends upon the computation of Fast Fourier Transform (FFT) algorithm. In this paper, we present some fundamental FFT aspects associate with OFDM system. Various FFT size has been tested to choose the best FFT size in OFDM communication system. In the later section, an implementation according to IEEE 802.11 OFDM standard’s FFT processor for OFDM system is implemented in SHARC processor.
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