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M Arunkumar and N Kirthika
Sri Ramakrishna Engineering College, Coimbatore, India.

Abstract—Wireless systems is mainly based on the Orthogonal Frequency Division Multiplexing (OFDM).The orthogonal frequency division multiplexing is mainly used to split the input signals into number of sub carrier signals. The orthogonal frequency division multiplexing requires an Inverse Fast Fourier Transform (IFFT).The inverse fast Fourier transform is mainly used to produce multiple sub-carriers signal. The FFT/IFFT processor for OFDM applications is described in this paper. The architecture uses single path delay feedback style and it occupies less memory space. The read only memory is mainly used to store the twiddle factors. To eliminate the Read Only Memory (ROM) a ROM-less FFT/IFFT processor is used. The reconfigurable complex multipliers is mainly used to achieve the ROM-less FFT/IFFT processor and the bit parallel multipliers is mainly used for square root evaluation. The Fused Multiply Add (FMA) operation is very important in many scientific and engineering fields. The floating point unit increases the performance and accuracy of the floating point. The Fused Multiply and Add unit is mainly used to reduce the latency and power.

Index Terms—FFT, IFFT, Fused multiply add unit, Complex multiplier

Cite: M Arunkumar and N Kirthika, "EFFICIENT IMPLEMENTATION OF ROM-LESS FFT/IFFT PROCESSOR USING FUSED MULTIPLY AND ADD UNIT," International Journal of Electrical and Electronic Engineering & Telecommunications, Vol. 2, No. 2, pp. 33-41, April 2013.