The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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A Low-Complexity Frequency Offset Estimation Scheme Based on Partial Periodogram for OFDM-Based CR Systems

OFDM 기반 CR 시스템을 위한 부분 주기도표 기반의 저복잡도 주파수 옵셋 추정 기법

  • 정다해 (성균관대학교 정보통신공학부) ;
  • 박종인 (성균관대학교 정보통신공학부) ;
  • 배진수 (세종대학교 정보통신공학과) ;
  • 윤석호 (성균관대학교 정보통신공학부)
  • Received : 2011.07.22
  • Accepted : 2011.09.25
  • Published : 2011.10.31
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Abstract

This paper proposes a frequency offset estimation scheme with low-complexity for orthogonal frequency division multiplexing (OFDM)-based cognitive radio (CR) systems. The proposed scheme is applicable to any type of training symbol and has a lower complexity than the scheme in [9] by using the partial periodogram. Simulation results show that the estimation performance of the proposed scheme is almost the same as that of the scheme in [9].

본 논문은 직교 주파수 분할 다중화 (orthogonal frequency division multiplexing: OFDM) 기반 인지 무선 (cognitive radio: CR) 시스템을 위한 저복잡도 주파수 옵셋 추정 기법을 제안한다. 제안한 기법은 어떤 종류의 훈련심볼에도 적용할 수 있으며, 부분 주기도표를 이용함으로써 [9]의 기법에 비해 낮은 연산 복잡도를 갖는다. 모의실험을 통해 제안한 기법이 [9]의 기법과 거의 비슷한 추정 성능을 가짐을 보인다.

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References

  1. S. Haykin, "Cognitive radio: brain-empowered wireless communications," IEEE J. Select. Areas Commun., Vol.23, No.2, pp.201-220, Feb. 2005. https://doi.org/10.1109/JSAC.2004.839380
  2. H. Mahmoud, T. Yucek, and H. Arslan, "OFDM for cognitive radio: merits and challenges," IEEE Wireless Commun., Vol.16, No.2, pp.6-15, Apr. 2009.
  3. R. V. Nee and R. Prasad, OFDM for Wireless Multimedia Communications, Boston, MA: Artech House, 2000.
  4. K. Fazel and S. Kaiser, Multi-Carrier and Spread Spectrum Systems. West Sussex, England: John Wiley and Sons, 2003.
  5. P. H. Moose, "A technique for orthogonal frequency division multiplexing frequency offset correction," IEEE Trans. Commun., Vol.42, No.10, pp.2908-2914, Oct. 1994. https://doi.org/10.1109/26.328961
  6. T. M. Schmidl and D. C. Cox, "Robust frequency and timing synchronization for OFDM," IEEE Trans. Commun., Vol.45, No.12, pp.1613-1621, Dec. 1997. https://doi.org/10.1109/26.650240
  7. M. Morelli and U. Mengali, "An improved frequency offset estimator for OFDM applications," IEEE Commun. Lett., Vol.3, No.3, pp.75-77, Mar. 1999. https://doi.org/10.1109/4234.752907
  8. J.-J. van de Beek, M. Sandell, and P. O. Borjesson, "ML estimation of time and frequency offset in OFDM systems," IEEE Trans. Sig. Process., Vol.45, No.7, pp.1800-1805, July 1997. https://doi.org/10.1109/78.599949
  9. G. Ren, Y. Chang, H. Zhang, and H. Zhang, "An efficient frequency offset estimation method with a large range for wireless OFDM systems," IEEE Trans. Veh. Technol., Vol.56, No.4, pp.1892-1895, July 2007. https://doi.org/10.1109/TVT.2006.878560
  10. Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specification, Higher-Speed Physical Layer Extension in 5GHz Band, IEEE 802.11a, 1999.
  11. Part 16: Air Interface for Fixed Broadband Wireless Access Systems, IEEE 802.16, 2004.