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

  • 제41권12호
  • /
  • Pages.1736-1738
  • /
  • 2016
  • /
  • 1226-4717(pISSN)
  • /
  • 2287-3880(eISSN)
한국통신학회 (The Korean Institute of Commucations and Information Sciences)
권호 표지
DOI QR코드

DOI QR Code

대수우도비 근사화에 따른 복조와 복호의 결합 성능

Joint Performance of Demodulation and Decoding with Regard to Log-Likelihood Ratio Approximation

  • Park, Sung-Joon (Dept. of Electronic Engineering, Gangneung-Wonju National University) ;
  • Jo, Myung-Suk (Dept. of Electronic Engineering, Gangneung-Wonju National University)
  • 투고 : 2016.10.06
  • 심사 : 2016.11.07
  • 발행 : 2016.12.31
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

고차변조와 고효율 채널부호를 사용하는 통신시스템에서는 지수함수의 합 로그 연산을 수반하는 다량의 대수우도비 산출이 필수적이며 이의 근사화 기법에 따라 링크 성능이 좌우된다. 본 논문에서는 신규 근사화 기법을 복조기와 복호기에 결합하여 적용하고 복잡도를 분석하며 모의실험을 통해 도출한 결합 성능을 분석한다.

In modern digital communication systems adapting high-order modulation and high performance channel code, log-likelihood ratios involving the repeated calculations of the logarithm of sum of exponential functions are necessary for demodulation and decoding. In this paper, the approximation methods called Min and MinC are applied to demodulation and decoding together and their complexity and joint performance are analyzed.

키워드

참고문헌

  1. S.-J. Park, "Bitwise log-likelihood ratios for quadrature amplitude modulations," IEEE Commun. Lett., vol. 19, no. 6, pp. 921-924, Jun. 2015. https://doi.org/10.1109/LCOMM.2015.2424423
  2. P. Robertson, E. Villebrun, and P. Hoeher, "A comparison of optimal and sub-optimal MAP decoding algorithms in the log domain," in Proc. IEEE Int. Conf. Commun., pp. 1009- 1013, Seattle, WA, USA, Jun. 1995.
  3. D.-H. Kim and S.-Y. Hwang, "Design of an efficient turbo decoder by initial threshold setting," J. KICS, vol. 26, no. 5, pp. 582-591, May 2001.
  4. S. Papaharalabos, P. T. Mathiopoulos, G. Masera, and M. Martina, "On optimal and near-optimal turbo decoding using generalized max operator," IEEE Commun. Lett., vol. 13, no. 7, pp. 522-524, Jul. 2009. https://doi.org/10.1109/LCOMM.2009.090537
  5. M. R. Soleymani, Y. Gao, and U. Vilaipornsawai, Turbo Coding for Satellite and Wireless Commmunications, Kluwer, 2002.