Information and Communications Magazine (정보와 통신)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
권호 표지

Synchronization and Channel Estimation in OFDM Systems

  • Published : 2007.08.20
Download PDF
⟨ Previous Next ⟩

Abstract

차세대 이동 통신 시스템은 다양한 응용 분야들을 지원하기 위하여 광대역을 사용한 고속 데이터 전송이 가능해야 할 것이다. 이와 같은 요구 사항을 효율적으로 대처할 수 있는 중요한 전송 방식중의 하나가 OFDM (Orthogonal frequency division multiplexing) 기법이며, 여러 국제 표준단체에서 차세대 전송 방식의 중요 후보로써 채택하여 심도깊은 연구가 진행되고 있는 실정이다. 본 고에서는 OFDM 전송 방식의 기본적인 특징을 살펴보고, OFDM 시스템 상에서 동기 획득 (Synchronization) 및 채널 추정 (Channel estimation)을 위하여 사용될 수 있는 기본적인 알고리즘들에 대하여 간략히 소개하고 그 특징을 살펴본다.

Keywords

References

  1. J G. Proakis, "Digital Communications," 3rd Ed., New York, McGraw-Hill, 1995
  2. B. Sklar, "Digital Cormmunications," Englewood Cliffs, NJ, Prentice-Hall, 1998
  3. J. A. C. Bingham, "Multicarrier modulation for data transmission: an idea whose time has come," IEEE Commun. Mag. , Vol. 28, pp.17-25, Mar. 1990
  4. G. L. Stuber and M. Russel, ''Terrestrial digital video broadcasting for mobile reception using OFDM," in Proc. IEEE GLOBECOM, pp. 2049-2053, Nov. 1995
  5. L. Hanzo, "Bandwidth efficient wireless multimedia communications," Proc. IEEE, Vol. 86, no. 7, pp. 1342-1382, July 1998 https://doi.org/10.1109/5.681368
  6. J.J van de Beek et all, "ML Estimation of Time and Frequency Offset in OFDM Systems", IEEE Trans. Signal Processing, Vol.45, No.7, pp.1800-1805, 1997 https://doi.org/10.1109/78.599949
  7. P. H. Moose, "A technique for orthogonal frequency division multiplexing frequency offset con'ection," IEEE Trans. Corrunun., Vol. 42, pp. 2908-2914, Oct. 1994 https://doi.org/10.1109/26.328961
  8. F. Tufvesson and T. Maseng, "Pilot assisted channel estimation for OFDM in mobile cellular systems," in Proc. IEEE VTC, pp. 1639-1643, May 1997
  9. J.-J. Van de Beek, O. Edfors, M. Sandell, S. K. Wilson and P. O. Boljesson, "On channel estimation in OFDM systems," in Proc. IEEE VTC, pp. 815-819, JuIy 1995
  10. K. Taura, M. Tsujishta, M. Takeda, H. Kato, M. Ishida and Y. Ishida "A Digital Audio Broadcasting(DAB) Receiver", IEEE Trans. Consumer Electronics, Vol. 42, No.3, pp.322-326, Aug. 1996 https://doi.org/10.1109/30.536126
  11. Timothy M. Schmidl and Donald C. Cox, "Robust Frequency and Timing Synchronization for OFDM", IEEE Trans. Comm., VOL,45, No.12, pp.1613-1621, 1997 https://doi.org/10.1109/26.650240
  12. H. Minn, M. Zeng, and V.K. Bhargava, "On Timing Offset Estimation for OFDM Systems," IEEE Communication Letters, vol. 4, pp. 242-244, Jul. 2000 https://doi.org/10.1109/4234.852929
  13. Byungjoon Park, Hyunsoo Cheon, Changeon Kang, Daesik Hong, "A Novel Timing Estimation Method for OFDM Systems," IEEE Corrununication Letters, Vol. 7, pp.239-241 , May, 2003 https://doi.org/10.1109/LCOMM.2003.812181
  14. H. Nogarni, T. Nagashima, "A Frequency and Timing Period Acquisition Technique for OFDM Systems" , PIMRC' 95, pp.1010-1015, 1995
  15. Keukjoon Bang, Namshin Cho, Jaehee Cho, Kwanchul Kim, Hyuncheol Park, Daesik Hong, "A coarse frequency offset estimation in an OFDM system using the concept of the coherence phase bandwidth," IEEE Trans. on Communications, Vol. 49 Issue: 8, p.p 1320-1324, Aug 2001 https://doi.org/10.1109/26.939841
  16. P. Moose, "A technique for orthogonal frequencydivision multiplexing frequency offset conection," IEEE Trans. Commun., Vol.42, No.10, pp.2908-2914, Oct. 1994 https://doi.org/10.1109/26.328961