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A High-Speed Low-Complexity 128/64-point $Radix-2^4$ FFT Processor for MIMO-OFDM Systems  

Hang, Liu (Dept. of Information and Communication Engineering, Inha University)
Lee, Han-Ho (Dept. of Information and Communication Engineering, Inha University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.46, no.2, 2009 , pp. 15-23 More about this Journal
Abstract
This paper presents a novel high-speed, low-complexity flexible 128/64-point $radix-2^4$ FFT/IFFT processor for the applications in high-throughput MIMO-OFDM systems. The high radix multi-path delay feed-back (MDF) FFT architecture provides a higher throughput rate and low hardware complexity by using a four-parallel data-path scheme. The proposed processor not only supports the operation of FFT/IFFT in 128-point and 64-point but can also provide a high data processing rate by using a four-parallel data-path scheme. Furthermore, the proposed design has a less hardware complexity compared with traditional 128/64-point FFT/IFFT processors. Our proposed processor has a high throughput rate of up to 560Msample/s at 140MHz while requiring much smaller hardware expenditure satisfying IEEE 802.11n standard requirements.
Keywords
FFT; MDF; $radix-2^4$; MIMO-OFDM; communications;
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