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IJSEA Archive (Volume 2, Issue 7)

International Journal of Science and Engineering Applications (IJSEA)  (Volume 2, Issue 7 - July 2013)

Design and Implementation of Inverse Fast Fourier Transform for OFDM

R. Durga Bhavani, D. Sudhakar



    Keywords: OFDM, IFFT, FFT, QPSK.

Abstract References BibText

        OFDM is the most promising modulation technique for most of the wireless and wired communication standards. The basic idea of OFDM is to divide the available spectrum into several sub channels, making all sub channels narrowband which experiences flat fading. OFDM uses the spectrum efficiently due to its orthogonality and prevents interference between the closely spaced carriers. OFDM provides high bandwidth efficiency because the carriers are orthogonal to each others and multiple carriers share the data among themselves. The main advantage of this transmission technique is their robustness to channel fading in wireless communication environment. The main focus of this paper is to design IFFT and FFT blocks which are used in transmitter and receiver blocks of OFDM system. The methodology used is the 8-point IFFT/FFT (DIF) with radix-2. The design unit also consists of spreader and despreader for mapping technique. The implementation is done in FPGA by using Verilog HDL. The timing simulation and synthesized results are performed and the design is analyzed by using Xilinx ISE tools.

[1] Poonam Agrawal, Vikas Gupta, ”Enhanced Core Processor Blocks of OFDM System”. International Journal of Electronics and Communication and Computer Engineering Volume 1 Issue 2, November 2011
[2] Manjunath Lakkannavar, Ashwini Desai, “Design and Implementation of OFDM”. International Journal of Engineering and Advanced Technology(IJEAT) Volume 1 Issue 6, August 2012.
[3] K.Hari Krishna, T.Rama Rao, Vladimir A Labay, “FPGA Implementation of FFT Algorithm for IEEE 802.16e (Mobile WiMax)”.International Journal of Computer Theory and Engineering, Vol. 3, No.2 , April 2011.
[4] Ahmed Saeed, M.Elbably, G.Abdelfadeel, and M.I.Eladway, “Efficient FPGA Implementation of FFT/IFFT Processor”, International Journal of Circuits, Systems and Signal Processing.
[5] M.A..Mohamed, A.S.Samarah, and M.I.Fath Allah, ”Implementation of the OFDM Physical Layer Using FPGA”. International Journal of Computer Science Issues, Vol.9, Issue 2,No 2, March 2012.
[6] Shaminder Kaur, Rajesh Mehra, “FPGA Implementation of OFDM Transceiver using FFT Algorithm” .International Journal of Engineering Science and Technology(IJEST).
[7] Intuitive guide to Principles of communications, copyright 2002 Charan Langton, revised Dec 2005.
[8] M.A.Mohamed, A.S.Samarah and M.I.Fath Allah ” Implementation of Adaptive OFDM System using FPGA”. International Journal of Computer Science Issues,Vol.9, Issue 3, No 3,May 2012

title = "FPGA Implementation of Real Time Data Acquisition System Using Micro blaze Processor. ",
journal = "International Journal of Science and Engineering Applications (IJSEA)",
volume = "2",
number = "7",
pages = "155 - 158",
year = "2013",
author = " R.Durga Bhavani, D.Sudhakar ",