Implementation of OFDM System Using 256 Point IFFT and FFT

Isha Tayal

International Journal of Broadband Cellular Communication

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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Implementation of OFDM System Using 256 Point IFFT and FFT

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