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Implementation of OFDM System Using 256 Point IFFT and FFT

Isha Tayal

Abstract


OFDM is a special case of multicarrier transmission, where a single data stream is transmitted over a number of lower rate subcarriers. The main reason to use OFDM is to increase the robustness against the selective fading or narrowband interference. A large number of closely spaced orthogonal sub-carrier signals are used to carry data on several parallel data streams or channels. Each sub-carrier is modulated with a conventional modulation scheme (such as quadrature amplitude modulation or phase-shift keying) at a low symbol rate, maintaining total data rates similar to conventional single-carrier modulation schemes in the same bandwidth.
Keywords: FFT, IFFT, OFDM, QAM, VHDL

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References


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DOI: https://doi.org/10.37628/jbcc.v2i1.294

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