디지털융복합연구 (Journal of Digital Convergence)

  • 제16권5호
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  • Pages.231-237
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  • 2018
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  • 2713-6434(pISSN)
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  • 2713-6442(eISSN)
한국디지털정책학회 (The Society of Digital Policy and Management)
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길쌈 부호화 시공간 블록 부호 시스템의 오류 성능에 대한 채널 변화 및 채널 추정 오류의 영향

Impact of Channel Variations and Channel Estimation Errors on the Error Performance of Convolutional Coded STBC Systems

  • Yun, Eunsik (Dept. of Research Center, M&D Corporation) ;
  • Kim, Sun-Hyung (Dept. of Information and Communication Engineering, Soonchunhyang University) ;
  • Park, Sangjoon (Dept. of Information and Communication Engineering, Wonkwang University) ;
  • Kang, Byeong-Gwon (Dept. of Information and Communication Engineering, Soonchunhyang University)
  • 투고 : 2018.03.08
  • 심사 : 2018.05.20
  • 발행 : 2018.05.28
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초록

논문에서는 길쌈 부호화 시공간 블록 부호 시스템의 오류 성능에 대한 채널 변화 및 채널 추정 오류의 영향에 대해 살펴보았다. 본 논문에서는 직교 방식의 Alamouti 시공간 블록 부호 및 준직교 방식의 Jafarkhani 시공간 블록 부호의 두 가지 시공간 블록 부호 방식을 고려하여, 길쌈 부호화 시공간 블록 부호 시스템들에서 채널 변화 및 추정 오류 정도에 따른 오류 성능 변화를 모의실험을 통해 분석하였다. 분석 결과 채널 변화 속도가 느린 경우에는 시간 다이버시티 효과로 인해 채널 변화가 없는 상황 대비 검출 방식에 관계없이 오류 성능이 향상되나, 채널 변화 속도가 빠른 경우에는 검출 과정에서의 오류로 인해 특히 준직교 Jafarkhani 적용 시스템에서 STBC 검출 사용 시 ZF 및 MMSE 검출 사용 시와 달리 큰 폭의 성능 열화가 발생함을 관측하였다. 또한 채널 추정 오류 증가 시에는 검출 기법 및 채널 변화 속도에 관계없이 큰 폭의 성능 열화가 발생함을 확인하였다.

This paper investigates the impact of the channel variations and channel estimation errors on the error performance of convolutional coded STBC systems. We consider the orthogonal Almouti STBC and the quasi-orthogonal Jafarkhani STBC, and the error performance of the convolutional coded STBC system is investigated according to the channel variation and channel estimation error via numerical simulations. Simulation results show that, if the channel variation speed is slow, time diversity effects improve the error performance compared to the static-channel cases. However, if the channel variation speed is fast, unlike ZF or MMSE detection, the conventional STBC detection has the significant performance degradation especially with the quasi-orthogonal Jafarkhani STBC. Further, the error performance of the system is significantly degraded as the channel estimation errors become stronger, regardless of the detection scheme and channel variation speed.

키워드

참고문헌

  1. S. M. Alamouti. (1998). A simple transmit diversity technique for wireless communications. IEEE J. Select. Areas Commun. 16(8), 1451-1458. https://doi.org/10.1109/49.730453
  2. H. Jafarkhani. (2001). A quasi-orthogonal space-time block code. IEEE Trans. on Commun. 49(1), 1-4. https://doi.org/10.1109/26.898239
  3. H. Jafarkhani. (2005). Space-Time Coding: Theory and Practice. Cambridge. Cambridge University Press.
  4. Y. Cho, J. Kim, W. Yang & C. Kang. (2011). MIMO-OFDM Wireless Communications with MATLAB. New York. Wiley-IEEE Press.
  5. S. Chern, W. Huang & H. Liu. (2016). The effects of mutual coupling for the space-time block coded MIMO-OFDM systems. Proc. ISPACS 2016. 1-6.
  6. J. Wu & G. J. Saulnier. (2007). Orthogonal space-time block code over time-varying flat-fading channels: channel estimation, detection, and performance analysis. IEEE Trans. on Commun. 55(5), 1077-1087. https://doi.org/10.1109/TCOMM.2007.895982
  7. K. Fang & G. Leus. (2009). Space-time block coding for frequency-selective and time-varying channels, Proc. ASILOMAR. 625-629.
  8. F. C. Zheng & A. G. Burr. (2005). Signal detection for orthogonal space-time block coding over time-selective fading channels: a PIC approach for the Gi systems. IEEE Trans. on Commun. 53(6), 969-972. https://doi.org/10.1109/TCOMM.2005.849990
  9. Y. Whang & H. Park. (2008). An adaptive space-time receiver for time-varying channel with imperfect channel estimation. Proc. IEEE WCNC 2008. 1-5.
  10. M. Norouzi, E. Attang, Y. Wu, R. B. Ellis & G. E. Atkin. (2015). Impact of channel estimation errors on the performance of space time code. Proc. IEEE EIT 2015, 587-591.
  11. ITU-R Rec. M. 1225. (1997). Guidelines for evaluation of radio transmission technologies for IMT-2000.
  12. IEEE 802.16. (2006). IEEE Standard for local and metropolitan area networks - part 16: Air Interface for Fixed Broadband Wireless Access Systems.
  13. 3GPP 36.212. (2010), Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Multiplexing and Channel Coding.
  14. P. Sweeney. (2002). Error Control Coding: From Theory to Practice. John Wiley & Sons.
  15. T. K. Moon. (2005). Error Correction Coding: Mathematical Methods and Algorithms. New York. John Wiley & Sons.
  16. J. Lee. (2015) Convergent case study of research and education: internet of things based wireless device forming research. Journal of the Korea Convergence Society. 6(4), 1-7. https://doi.org/10.15207/JKCS.2015.6.4.001
  17. K. Kim & S. Yun. (2016) A study on BER performance improvement by using adaptive FEC schemes in visible light communication. Journal of Convergence for Information Technology. 6(4), 99-106.
  18. S. Hong. (2017) Research on IoT international strategic standard model. Journal of the Korea Convergence Society. 8(2), 21-26. https://doi.org/10.15207/JKCS.2017.8.2.021
  19. J. Kim, J. Cho, D. Cho & D. Son. (2017) A study on radio interference analysis for wireless LAN. Journal of Convergence for Information Technology. 7(5), 117-122. https://doi.org/10.22156/CS4SMB.2017.7.5.117