Design of a Multipath Delay Feedback(MDF)FFT processor for OFDM 


Vol. 27,  No. 11, pp. 1116-1125, Nov.  2002


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  Abstract

OFDM(Orthogonal Frequency Division Multiplexing)is a next generation technique for data modulation. It has been adopted as a standard in DAB and DVB in Europe, and also in IEEE 802.11a WLAN and digital subscriber line(xDSL) systems. In this paper, we analyze previous approaches of a 64 point FFT(Fast Fourier Transform) processor, which is a core module of the OFDM modem, and propose a new FFT architecture, what we call Radix-2 MDF(Multipath Delay Feedback), that can greatly reduce hardware area without any performance degradation. Compared to the most widely used architecture, Radix-2 SDF, the MDF uses only half number of complex multipliers. Considering that complex multipliers occupy about 80% of the entire FFT processor, the MDF requires only 60% hardware area of the SDF. The Radix-2 MDF can also be applied to much bigger FFT processors, such as 1024 or 8048-Point FFT, with the same degree of area advantage. To our Know ledge, this can be considered as one of the most efficient architecture to implement a FFT processor for high performance VLSI or ASIC.

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  Cite this article

[IEEE Style]

J. Lee and Y. Jeong, "Design of a Multipath Delay Feedback(MDF)FFT processor for OFDM," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 11, pp. 1116-1125, 2002. DOI: .

[ACM Style]

Jong-Min Lee and Yong-Jin Jeong. 2002. Design of a Multipath Delay Feedback(MDF)FFT processor for OFDM. The Journal of Korean Institute of Communications and Information Sciences, 27, 11, (2002), 1116-1125. DOI: .

[KICS Style]

Jong-Min Lee and Yong-Jin Jeong, "Design of a Multipath Delay Feedback(MDF)FFT processor for OFDM," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 11, pp. 1116-1125, 11. 2002.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880