전기전자학회논문지 (Journal of IKEEE)

  • 제14권4호
  • /
  • Pages.270-276
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  • 2010
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  • 1226-7244(pISSN)
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  • 2288-243X(eISSN)
한국전기전자학회 (Institute of Korean Electrical and Electronics Engineers)
권호 표지

OFDM 시스템에 적합한 FFT 성능 평가 및 구현

Performance Evaluation and Hardware Design of FFT for OFDM system

  • Kim, Joong-Min (School of Electronics Engineering, Konkuk University) ;
  • Park, In-Kap (School of Electronics Engineering, Konkuk University) ;
  • Cho, Yong-Bum (School of Electronics Engineering, Konkuk University)
  • 투고 : 2010.12.02
  • 심사 : 2010.12.29
  • 발행 : 2010.12.30
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초록

본 논문에서는 OFDM 시스템의 성능의 중요한 부분을 차지하는 FFT 알고리즘의 성능 비교와 제안된 SRFFT를 설계/구현 및 검증으로 우수성을 확인한다. 대부분의 OFDM 통신시스템에서는 단일 입력, 단일 출력형태를 사용하므로 SRFFT 적용이 매우 비효율적일 수 있다. 그러므로 OFDM 시스템에 적합한 구조의 필요성이 요구되고 기존에 나와 있는 SRFFT 구조를 변형하여, 단일 입력, 단일 출력의 Pipeline 구조를 갖는 FFT / IFFT 블록을 구현한다. 제안된 SRFFT는 Matlab과 Synthesis 및 Simulation Tool을 이용하여 유효성 확인과 기존 알고리즘과의 성능을 비교하고 동작을 검증하였다.

In this paper, performance comparison of FFT algorithms for OFDM system is shown and advantage of proposed SRFFT is verified through implementation. For the single input and output structure in the most OFDM communication systems, adaptation of SRFFT might be inefficient. In this paper, improved SRFFT with pipeline structured FFT/IFFT of single input and output is developed and verified with Matlab, VHDL, synthesis tool and simulation tool.

키워드

참고문헌

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