The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Design and Performance Evaluation of 8PSK-TCM System Using Turbo Equalizer for Satellite Communication

위성통신을 위한 터보 등화기를 사용하는 8PSK-TCM 시스템 설계와 성능 평가

  • An, Changyoung (Department of Electronics Engineering, Chungbuk National University) ;
  • Ryu, Sang-Burm (Payload Electronics Team, Korea Aerospace Research Institute) ;
  • Lee, Sang-Gyu (Payload Electronics Team, Korea Aerospace Research Institute) ;
  • Ryu, Heung-Gyoon (Department of Electronics Engineering, Chungbuk National University)
  • 안창영 (충북대학교 전자공학과) ;
  • 유상범 (한국항공우주연구원 탑재체전자팀) ;
  • 이상규 (한국항공우주연구원 탑재체전자팀) ;
  • 유흥균 (충북대학교 전자공학과)
  • Received : 2017.07.14
  • Accepted : 2017.10.25
  • Published : 2017.11.30
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Abstract

In this paper, as a basic study for combination of turbo equalizer and 4D-8PSK-TCM(4 Dimensional 8 Phase Shift Keying Trellis Coded Modulation) system, which is recommended for X-band band satellite communication in CCSDS, a system combining 8PSK-TCM system and turbo equalizer has designed and performance evaluation of the system has performed. BER performance of 8PSK and 8PSK-TCM systems has evaluated and analyzed in AWGN, Proakis B and Proakis C channels in detail. As results of simulation, BER performance of 8PSK-TCM system is better than 8PSK system in AWGN environment. Furthermore, it can be confirmed that the system combining the 8PSK-TCM system with the turbo equalizer can further improve the BER performance through iterative equalization in the ISI channel environment. The 8PSK-TCM system combined with the turbo equalizer requires SNR of 5.9 dB for BER performance of $10^{-3}$ with 5 iterative equalization in Proakis B and SNR of 9.1 dB for BER of $10^{-2}$ with 5 iterative equalization in Proakis C.

본 논문에서는 최근 CCSDS(Consultative Committe for Space Data Systems)에서 X밴드(X-Band) 대역 위성통신을 위해 권고되고 있는 4D(Dimension)-8PSK(Phase Shift Keying)-TCM(Trellis Coded Modulation) 시스템과 터보등화기를 결합하기 위한 기초 연구로 8PSK-TCM 시스템과 터보등화기를 결합한 시스템을 설계하고, 성능 평가를 수행하였다. 세부적으로 AWGN, Proakis B 채널, Proakis C 채널에서, 8PSK 및 8PSK-TCM 시스템의 BER 성능을 평가 및 분석하였다. 시뮬레이션 결과로, 8PSK 시스템에 비해 8PSK-TCM 시스템의 BER 성능이 우수하며, 8PSK-TCM 시스템에 터보등화기를 결합한 시스템은 ISI 채널 환경에서 반복등화를 통해 BER 성능을 더욱 개선시킬 수 있음을 확인할 수 있다. 본 논문에서 설계한 터보등화기를 결합한 8PSK-TCM 시스템은 5회의 반복등화를 통해 Proakis B에서 $10^{-3}$의 BER 성능을 만족시키기 위해 5.9 dB의 SNR이 요구되며, Proakis C 채널에서는 $10^{-2}$의 BER 성능을 만족시키기 위해 9.1 dB의 SNR이 요구됨을 확인할 수 있다.

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References

  1. Space Imaging Middle East, WorldView3, [Online]. Available: https://www.spaceimagingme.com/downloads/sensors/datasheets/DG_WorldView3_DS_2014.pdf
  2. Radio Frequency and Modulation Systems - Part 1: Earth Stations and Spacecraft, CCSDS 401.0-B: Blue Book, Issue 2000-06, Apr. 2009.
  3. A. Guerin, G. Lesthievent, and J.-L. Issler, "Telemetry architectures for future earth observation missions: Over 1 Gbit/s in X-band", in ITC2010, pp. 1-10, San Diego, 2010.
  4. Christine M. Hartzell, "Data system design for a hyperspectral imaging mission concept", in 2009 IEEE Aerospace Conference, pp. 1-21, Mar. 2009.
  5. W. Fong, A. Gray, and P.-S. Yeh, "Bandwidth efficient baseband multi-modulator", in NASA Earth Science Technology Conference, Jun. 2003.
  6. L. Huang, J. Wang, J. Zhu, J. Yang, F. Ren, and X. Liu, "Research on 4-D 8PSK TCM decoding algorithm", in Proceedings of 2012 2nd International Conference on Computer Science and Network Technology, Changchun, 2012, pp. 1894-1897.
  7. C. Tuna, "Comparison of BER performances of MMSE equalizer and viterbi algorithm for the MLSE solution in 60 GHz communication channel", in 2015 9th International Conference on Electrical and Electronics Engineering (ELECO), Bursa, Nov. 2015, pp. 1212-1215.
  8. M. Tuchler, R. Koetter, and A. C. Singer, "Turbo equalization: principles and new results", in IEEE Transactions on Communications, vol. 50, no. 5, pp. 754-767, May 2002. https://doi.org/10.1109/TCOMM.2002.1006557
  9. P. Yang, J.-H Ge, "Combination of turbo equalization and turbo TCM for mobile communication system", IEEE International Symposium on Communications and Information Technology, 2005, Oct. 2005, pp. 383-386.