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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Relationships between Diversity Techniques and Channel Coding Rates for SC-FDMA Systems

SC-FDMA 시스템에서의 다이버시티 기술과 채널부호화율의 관계

  • 임민중 (동국대학교 정보통신공학과)
  • Published : 2009.01.31
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Abstract

In OFDMA or SC-FDMA systems one can generate time varying channels or frequency selective channels using multiple transmit antennas to achieve diversity without special space-time processing at the receivers. While low channel coding rate needs to be used for distributed-allocation SC-FDMA systems with a phase rolling technique to produce time fluctuation, relatively high channel coding rate can be used when cyclic delay diversity is used to increase frequency selectivity assuming quasi-static channel. On the other hand, for block-hopping SC-FDMA systems there is no significant difference between two diversity techniques in terms of optimal channel coding rates.

OFDMA 및 SC-FDMA 시스템에서, 수신기에서 특별한 시공간 처리를 하지 않으면서 다이버시티를 얻기 위해서, 다수 안테나를 이용하여 시간축의 변화를 일으키거나 주파수 선택적 채널을 만들 수 있다. 분산할당 SC-FDMA 시스템에서 시간 변화를 발생하기 위해 위상 회전 기술을 사용하기 위해서는 낮은 채널부호화율을 적용하는 것이 필요하지만, 시간 변화가 적은 채널을 가정할 때 주파수 선택적 특성을 증가시키기 위하여 순환지연 다이버시티를 적용할 때에는 상대적으로 높은 채널부호화율을 적용하여도 무방하다. 이에 반해서 블록호핑 SC-FDMA 시스템에서는 두 개의 다이버시티 기술이 최적의 채널부호화율 측면에서 큰 차이를 가지지 않는다.

Keywords

References

  1. Z. Wang, G. B. Giannakis, 'Wireless Multicarrier Communications,' IEEE Signal Processing Magazine, Vol.17, No.3, pp.29-48, May 2000 https://doi.org/10.1109/79.841722
  2. H. Witschnig, T. Mayer, A. Springer, A. Koppler, 'A Different Look on Cyclic Prefix for SC/FDE,' PIMRC, pp.824-828, September 2002
  3. H. Witschnig, G. Ossberger, A. Springer, A. Koppler, L. Maurer, M. Huemer, R. Weigel, 'The Effect of Blockwise Transmission on Higher-Order Modulation Schemes for SC/FDE,' International Symposium Wireless Personal Multimedia Communications, pp.27-30, October 2002 https://doi.org/10.1109/WPMC.2002.1088394
  4. N.Al-Dhahir, 'Single-Carrier Frequency-Domain Equalization for Space-Time Block-Coded Transmissions over Frequency-Selective Fading Channels,' IEEE Communications Letters, Vol.5, No.7,p p.304-306, July 2001 https://doi.org/10.1109/4234.935750
  5. IEEE Standard 802.16a: Air Interface for Fixed Broadband Wireless Access Systems – Amendment 2: Medium Access Control Modifications and Additional Physical Layer Specifications for 2-11GHz, IEEE
  6. D. Falconer, S.L. Ariyavisitakul, A. Benyamin-Seeyar, B. Eidson, 'Frequency Domain Equalization for Single-Carrier Broadband Wireless Systems,' IEEE Communications Magazine, Vol.40, No.4, pp.58-66, April 2002 https://doi.org/10.1109/35.995852
  7. A. Gusmao, R. Dinis, J. Conceicao, N. Esteves, 'Comparisons of Two Modulation Choices for Broadband Wireless Communications,' VTC, pp.1300-1305, May 2000
  8. H. Liu, G. Li, OFDM-Based Broadband Wireless Networks, John Wiley & Sons Inc. 2005
  9. IEEE P802.16e/D12: Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access Systems: Amendment for Physical and Medium Access Control Layers for Combined Fixed and Mobile Operation in Licensed Bands, October 2005
  10. IEEE802.20: QFDD and QTDD: Proposed Draft Air Interface Specification, Qualcomm, October 2005
  11. 3GPP TR 25.814: Technical Specification Group Radio Access Network; Physical Layer Aspects for Evolved UTRA, February 2006
  12. R1-050807, ETRI, Pilot Structure for SC-FDMA, London, England, August 2005
  13. R1-050834, LG Electronics, Basic Performance Results for Uplink OFDMA and SC-FDMA, London, England, September 2005
  14. R1-051099, Qualcomm, Considerations on OFDMA and SC-FDMA based Uplink for E-UTRA Evaluation – Link Aspects, SanDiego, CA, October 2005
  15. R1-051421, Nortel, UL Link Level Performance of SC-FDMA and OFDMA with Real Channel Estimation and Virtual MIMO, Seoul, Korea, November 2005
  16. D. Gesbert, M. Shafi, D.S. Shiu, P.J. Smith, A. Naguib, 'From Theory to Practice: An Overview of MIMO Space-Time Coded Wireless Systems,' IEEE Journal on Selected Areas in Communications, Vol.21, No.3, pp.281-302, April2003 https://doi.org/10.1109/JSAC.2003.809458
  17. A. Paularj, R. Nabar, D. Gore, Introduction to Space-Time Wireless Communications, Cambridge University Press, 2003
  18. G. Bauch, J.S. Malik, 'Orthogonal Frequency Division Multiple Access with Cyclic Delay Diversity', Smart Antennas, 2004. ITG Workshop, pp.17-24, March 2004
  19. A. Huebner, F. Schuehlein, M. Bossert, E. Costa, H. Haas, 'A Simple Space-Frequency Coding Scheme with Cyclic Delay Diversity for OFDM,' Personal Mobile Communications Conference, 2003. 5th European, pp.106-110, April 2003
  20. G. Bauch, and J. S. Malik, 'Cyclic delay diversity with bit-interleaved coded modulation in orthogonal frequency division multiple access', IEEE Trans. Wireless Communications, Vol.5, No.8, pp.2092-2100, August 2006 https://doi.org/10.1109/TWC.2006.1687724
  21. S. Haykin, 'Communication Systems,' John Wiley & Sons, 2001
  22. R1-031303, Ericsson, 'System-level evaluation of OFDM - further considerations,' 3GPP RAN WGI #35, Lisbon, Portugal, Novermber 2003
  23. T.M. Cover and J.A. Thomas, Elementary of Information Theory, Wiley, New York, 1991
  24. D.S. Yoo, W.E. Stark, 'Characterization of WSSUS Channels: Normalized Mean Square Covariance and Diversity Combining,' IEEE Trans. on Wireless Communications, Vol.4, No.4 pp.1307-1310, July 2005 https://doi.org/10.1109/TWC.2005.847019
  25. Y.C. Liang, W.S. Len, Y. Zeng, C. Xu, 'Design of Cyclic Delay Diversity for Single Carrier Cyclic Prefix Transmissions with Block-Iterative GDFE Receiver,' IEEE Trans. on Wireless Communications, Vol.7, No.2, pp.677-684, February 2008 https://doi.org/10.1109/TWC.2008.060625