지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
이용수
초록· 키워드
오류제보하기
By combining the space-time diversity technique and iterative turbo codes, space-time turbo codes(STTCs) are able to provide powerful error correction capability. However, the multi-path transmission and iterative decoding structure of STTCs make the decoder very complex. In this paper, we propose a low complexity decoder, which can be used to decode STTCs as well as general iterative codes such as turbo codes. The efficient implementation of the backward recursion and the log-likelihood ratio(LLR) update in the proposed algorithm improves the computational efficiency. In addition, if we approximate the calculation of the joint LLR by using the approximate ratio(AR) algorithm, the computational complexity can be reduced even further. A complexity analysis and computer simulations over the Rayleigh fading channel show that the proposed algorithm necessitates less than 40% of the additions required by the conventional Max-Log-MAP algorithm, while providing the same overall performance.
목차
ABSTRACT
Ⅰ. Introduction
Ⅱ. Space-time turbo code
Ⅲ. Low complexity decoder for STTC
Ⅳ. Complexity and performance analysis
Ⅴ. Conclusion
REFERENCES
저자소개
참고문헌 (11)
참고문헌 신청
Y. Wang and Q. Zhu, “Error control and concealment for video communication: A review”, Proc. of the IEEE, vol. 86, no. 5, pp. 974-997, May 1998.
V. Tarokh, N. Seshadri and A. R. Calderbank, “Space-time codes for high data rate wire less communication: Performance criterion and code construction”, IEEE Trans. Inform. Theory, vol. 44, no. 2, pp. 744-765, Mar. 1998.
V. Tarokh, H. Jafarkhani and A. Calderbank, “Space-time block coding for wireless communications: Performance results”, IEEE J. Select. Areas Commun., vol. 17, no. 3, pp. 451-460, Mar. 1999.
H. J. Su and E. Geraniotis, “Space-time turbo codes with full antenna diversity”, IEEE Trans. Commun., vol. 49, no. 1, pp.47-57, Jan. 2001.
Y. Liu, M. P. Fitz, M., P. and O. Y. Takeshita, “Full rate space-time turbo codes”, IEEE J. Select. Areas Commun., vol. 19, no. 5, pp. 969-980, May 2001.
V. Tarokh, N. Seshadri and A. R. Calderbank, “Space-time codes for high data rate wire less communication: Performance criterion and code construction”, IEEE Trans. Inform. Theory, vol. 44, no. 2, pp. 744-765, Mar. 1998.
V. Tarokh, H. Jafarkhani and A. Calderbank, “Space-time block coding for wireless communications: Performance results”, IEEE J. Select. Areas Commun., vol. 17, no. 3, pp. 451-460, Mar. 1999.
H. J. Su and E. Geraniotis, “Space-time turbo codes with full antenna diversity”, IEEE Trans. Commun., vol. 49, no. 1, pp.47-57, Jan. 2001.
Y. Liu, M. P. Fitz, M., P. and O. Y. Takeshita, “Full rate space-time turbo codes”, IEEE J. Select. Areas Commun., vol. 19, no. 5, pp. 969-980, May 2001.
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