대한전자공학회:학술대회논문집 (Proceedings of the IEEK Conference)
- 대한전자공학회 2006년도 하계종합학술대회
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- Pages.13-14
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- 2006
OFDM FFT용 저전력 Radix-4 나비연산기 구조
Low-Power Radix-4 butterfly structure for OFDM FFT
- 김도한 (상명대학교 정보통신공학부) ;
- 김비철 (상명대학교 정보통신공학부) ;
- 허은성 (상명대학교 정보통신공학부) ;
- 이원상 (상명대학교 정보통신공학부) ;
- 장영범 (상명대학교 정보통신공학부)
- Kim, Do-Han (Department of Information and Telecommunication Engineering, Sangmyung University) ;
- Kim, Bee-Chul (Department of Information and Telecommunication Engineering, Sangmyung University) ;
- Hur, Eun-Sung (Department of Information and Telecommunication Engineering, Sangmyung University) ;
- Lee, Won-Sang (Department of Information and Telecommunication Engineering, Sangmyung University) ;
- Jang, Young-Beom (Department of Information and Telecommunication Engineering, Sangmyung University)
- 발행 : 2006.06.21
초록
In this paper, an efficient butterfly structure for Radix-4 FFT algorithm using DA(Distributed Arithmetic) is proposed. It is shown that DA can be efficiently used in twiddle factor calculation of the Radix-4 FFT algorithm. The Verilog-HDL coding results for the proposed DA butterfly structure show 61.02% cell area reduction comparison with those of the conventional multiplier butterfly structure. Furthermore, the 64-point Radix-4 pipeline structure using the proposed butterfly and delay commutators is compared with other conventional structures. Implementation coding results show 46.1% cell area reduction.
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