FFT/IFFT IP Generator for OFDM Modems 


Vol. 31,  No. 3, pp. 368-376, Mar.  2006


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  Abstract

This paper describes a FCore_GenSim(Parameterized FFT Core Generation & Simulation Program), which can be used as an essential IP(Intellectual Property) in various OFDM modem designs. The FCore_GenSim is composed of two parts, a parameterized core generator(PFFT_CoreGen) that generates Verilog-HDL models of FFT cores, and a fixed-point FFT simulator(FXP_FFTSim) which can be used to estimate the SQNR performance of the generated cores. The parameters that can be specified for core generation are FFT length in the range of 64～2048-point and word-lengths of input/output/internal/twiddle data in the range of 8-b～24-b with 2-b step. Total 43,659 FFT cores can be generated by FCore_GenSim. In addition, CBFP(Convergent Block Floating Point) scaling can be optionally specified. To achieve an optimized hardware and SQNR performance of the generated core, a hybrid structure of R2SDF and R2SDC stages and a hybrid algorithm of radix-2, radix-2/4, radix-2/4/8 are adopted according to FFT length and CBFP scaling.

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  Cite this article

[IEEE Style]

J. Lee, K. Shin, J. Kim, Y. Baek, I. Eo, "FFT/IFFT IP Generator for OFDM Modems," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 3, pp. 368-376, 2006. DOI: .

[ACM Style]

Jin-Woo Lee, Kyung-Wook Shin, Jong-Whan Kim, Young-Seok Baek, and Ik-Soo Eo. 2006. FFT/IFFT IP Generator for OFDM Modems. The Journal of Korean Institute of Communications and Information Sciences, 31, 3, (2006), 368-376. DOI: .

[KICS Style]

Jin-Woo Lee, Kyung-Wook Shin, Jong-Whan Kim, Young-Seok Baek, Ik-Soo Eo, "FFT/IFFT IP Generator for OFDM Modems," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 3, pp. 368-376, 3. 2006.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880