IEMEK Journal of Embedded Systems and Applications (대한임베디드공학회논문지)

Institute of Embedded Engineering of Korea (대한임베디드공학회)
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A Study on Optimization of Hardware Complexity of a FFT Processor for IEEE 802.11n WLAN

IEEE 802.11n WLAN을 위한 FFT 프로세서의 하드웨어 복잡도 최적화에 대한 연구

  • Received : 2011.01.31
  • Accepted : 2011.04.01
  • Published : 2011.08.31
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Abstract

A FFT/IFFT processor is the key component for orthogonal frequency division multiplexing (OFDM) systems based IEEE 802.11n wireless local area network (WLAN). There exists many radix algorithms according to the structure of butterfly as FFT sub-module, each has the pros and cons on hardware complexity. Here, mixed radix algorithms for 64 and 128 FFT/IFFT processors are proposed, which reduce hardware complexity by using mixture of radix-23 and radix-4 algorithms. The proposed algorithm finish calculation within 3.2${\mu}s$ in order to meet IEEE 802.11n standard requirements and it has less hardware complexity compared with conventional algorithms.

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References

  1. Bo Fu and Paul Ampadu, "An area efficient FFT/lFFT processor for MIMO-OFDM WLAN 802.11n.", Journal of Signal Processing Systems, Vol.56 pp. 59-68, 2009. https://doi.org/10.1007/s11265-008-0264-9
  2. 조용수, 무선 멀티미디어 통신을 위한 OFDM 기초, 대영사, 2001.
  3. 이홍원, 서정원, 정재학, 조상인, 최상성 "UWB-MIMO 시스템의 프리엠블 구조 설계", 대한임베디드공학회 논문집 Vol.2, No.1, pp. 66-75, 2007.
  4. M.P.Chitra and S.K.Srivatsa, "High Speed Mixed Radix FFT/IFFT Pipelined Architecture for MIMO OFDM WLAN 802.11n", European Journal of Scientific Research Vol.37 No.1, pp. 153-159, 2009.
  5. Chin-Teng Lin, Yuan Chu Yu, and Lan-Da Van, "A low-power 64-point FFT/IFFT design for IEEE 802.11a WLAN application", Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE international Symposium on, pp. 4523-4526, 2006.
  6. Koushik Maharatna, Eckhard Grass, and Ulrich Jagdhold, "A 64-point fourier transform chip for high-speed wireless LAN application using OFDM", IEEE Journal of Solid-state Circuits. Vol.39 No.3 pp. 484-493, 2004. https://doi.org/10.1109/JSSC.2003.822776
  7. H. Shousheng and M. Torkelson, "Designing pipeline FFT processor for OFDM (de)Modulation", Signals, Systems, and Electronics, .IEEE URSI Intenational Symposium on, Vol.29, pp. 257-262. 1998.
  8. L. Yu-Wei and L. Chen-Yi, "Design of an FFT/IFFT processor for MIMO OFEM Systems", IEEE Transactions on circuits and systems, Vol.54, No.4, pp. 807-815, 2007. https://doi.org/10.1109/TCSI.2006.888664
  9. Anthony T. Jacobson, Dean N. Truong, and Bevan M. Baas, "The design of a reconfigurable continuous-flow mixed-radix FFT processor", IEEE International Symposium Circuits and Systems (ISCAS), pp 1133-1136, 2009.