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A Novel FFT Architecture for an Efficient Utilization of OFDM Using Adaptive FFT Method

  • A. ManimaranEmail author
  • Aby K. Thomas
Chapter
Part of the Intelligent Systems Reference Library book series (ISRL, volume 172)

Abstract

OFDM is one of widely used multicarrier transmission schemes for wireless and mobile networking applications. In this article the structure of adaptive FFT is designed in VLSI environment. In traditional FFT, more number of computations are involved to determine the frequency response of the signal. In order to overcome this problem, parallel architecture in the models of Fast Fourier Transform (FFT) like single path radix-2 with delay feedback (SR2DF) FFT and multipath radix-2 with delay commutator (MR2DC) FFT were proposed. Both have different advantages in terms of VLSI concerns (area, delay, power). In this paper propose a novel FFT architecture which adaptively switch to the required FFT structure such as R2SDF and R2MDC based on the SNR values for high speed and low power applications.

Keywords

FFT R2MDC OFDM SNR 

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Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  1. 1.Hindustan Institute of Technology & ScienceChennaiIndia
  2. 2.Department of ECEHindustan Institute of Technology & ScienceChennaiIndia

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