Journal of the Institute of Electronics Engineers of Korea TC (대한전자공학회논문지TC)

The Institute of Electronics and Information Engineers (대한전자공학회)
권호 표지

Efficient Decoding Algorithm for Rate-2, $2{\times}2$ Space-Time Codes

Rate-2인 $2{\times}2$ 시공간 부호를 위한 효율적인 복호 알고리즘

  • 김정창 (포항공과대학교 전자컴퓨터공학부) ;
  • 전경훈 (포항공과대학교 전자컴퓨터공학부)
  • Published : 2009.03.25
Download PDF
⟨ Previous Next ⟩

Abstract

Recently, a rate-2, $2{\times}2$ space-time code with simple ML decoding has been designed. Though the simple ML decoding algorithm does reduce the ML decoding complexity, there is still need for improvement. In this paper, we propose an efficient decoding algorithm for the rate-2, $2{\times}2$ space-time code using interference cancellation techniques with performance virtually identical to that of ML decoding. Also, the decoding complexity of the proposed algorithm is significantly reduced compared to the conventional simple ML decoding, especially for large modulation orders.

최근에 간단한 ML 복호가 가능한 rate-2, $2{\times}2$ 시공간 부호가 개발되었다. 비록 이러한 간단한 ML 복호 알고리즘이 ML 복호 복잡도를 줄여 주지만 여전히 향상될 여지가 남아 있다. 본 논문에서는 간섭제거 방법을 사용하여 ML 복호와 거의 동일한 성능을 가지면서 rate-2, $2{\times}2$ 시공간 부호를 위한 효율적인 복호 알고리즘을 제안한다. 제안된 알고리즘의 복호 복잡도는 기존의 간단한 ML 복호에 비해서도 더욱 감소하며 변조 차수가 클수록 복호 복잡도 감소율은 더욱 증가한다.

Keywords

References

  1. IEEE 802.16e-2005: IEEE standard for local and metropolitan area networks-Part 16: Air interface for fixed and mobile broadband wireless access systems Amendment 2: Physical layer and medium access control layers for combined fixed and mobile operation in licensed bands, Feb. 2006
  2. S. M. Alamouti, "A simple transmit diversity technique for wireless communications," IEEE J. Sel. Areas Commun., vol. 16, no. 8, pp. 1451-1458, Oct. 1998 https://doi.org/10.1109/49.730453
  3. J.-C. Belfiore, G. Rekaya and E. Viterbo, 'The Golden code: a 2${\times}$2 full-rate space-time code with non-vanishing determinants,' IEEE Trans. Inf. Theory, vol. 51, no. 4, pp. 1432-1436, April 2005 https://doi.org/10.1109/TIT.2005.844069
  4. S. Sezginer and H. Sari, "Full-rate full-diversity 2x2 space-time codes of reduced decoder complexity," IEEE Commun. Letters, vol. 11, no. 12, pp. 973 -975, Dec. 2007 https://doi.org/10.1109/LCOMM.2007.071388
  5. J. Kim and K. Cheun, 'An efficient decoding algorithm for QO-STBCs based on iterative interference cancellation,' IEEE Commun. Letters, vol. 12, no. 4, pp. 292 -294, April 2008 https://doi.org/10.1109/LCOMM.2008.072190.