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  • Research Article
  • Open Access
  • Automatic IP Generation of FFT/IFFT Processors with Word-Length Optimization for MIMO-OFDM Systems

    EURASIP Journal on Advances in Signal Processing20102011:136319

    • Received: 26 May 2010
    • Accepted: 11 November 2010
    • Published:


    A systematic approach is presented for automatically generating variable-size FFT/IFFT soft intellectual property (IP) cores for MIMO-OFDM systems. The finite-precision effect in an FFT processor is first analyzed, and then an effective word-length searching algorithm is proposed and incorporated in the proposed IP generator. From the comparison, we show that our analysis of the finite precision effect in FFT is much more accurate than the previous work. With the flexible architecture and the effective word-length searching techniques, we can strike a good balance for the performance and the hardware cost of the generated IP cores. The generated FFT soft IP cores are portable and independent of the silicon technology, which helps to greatly reduce the design time. Experimental results demonstrate that the proposed IP generator indeed provides FFT IPs which meet the requirements and are more suitable in recent MIMO-OFDM communication standards/drafts than some conventional FFT IP generators.


    • Silicon
    • Information Technology
    • Intellectual Property
    • Systematic Approach
    • Quantum Information

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    Authors’ Affiliations

    Department of Electrical Engineering, National Central University, Jhongli, 32001, Taiwan


    © Pei-Yun Tsai et al. 2011

    This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.