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This paper represents low power and high speed 128-point pipelined Fast Fourier Transform (FFT) and its Inverse Fast Fourier Transform (IFFT) processor for OFDM. The Modified architecture also provides concept of ROM module and variable length support from 128~2048 point for FFT/IFFT for OFDM applications such as Digital Audio Broadcasting (DAB), Digital Video Broadcasting-Terrestrial (DVB-T), Asymmetric Digital Subscriber Loop (ADSL) and Very-high-speed Digital Subscriber Loop (VDSL). The 128-point architecture consists of an optimized pipeline implementation based on Radix-2 butterfly processor Element.
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