Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Study on the applicability of MIMO Joint Decoding to Dual-Contact Satellite Systems

이중 교신 위성 시스템의 MIMO 공동 복조의 적용성에 대한 연구

  • Received : 2018.03.27
  • Accepted : 2018.09.27
  • Published : 2018.10.01
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Abstract

This paper presents the applicability of MIMO joint decoding to dual-contact satellite systems in which two LEO satellites using X-band frequency band are transmitting each image data to two ground station antennas, simultaneously. When two satellites are closely positioned within the looking angle of the two antennas, each satellite interferes with each other by the relative antenna gain corresponding to an offset angle and this might cause the performance degradation without interference mitigation. To mitigate the performance degradation, SM MIMO techniques for joint decoding are applied. Especially, the relative antenna gain of ground station depending on the angle difference between two satellites in ground station antenna plays an important role in modelling the dual-contact satellite systems. The condition number of MIMO channel including the antenna gain calculated from the mathematical gain pattern model was primarily analyzed. Simulation results showed that the SM MIMO techniques using detection schemes such as ZF-SIC, MMSE-SIC, and ML can be applicable to dual-contact satellite systems.

본 논문에서는 X-밴드 대역의 하향 링크 시스템을 사용하는 2기의 저궤도 위성이 지상국으로 각각의 영상 데이터를 동시에 전송하는 이중 교신 위성 시스템 상황에서 공간 다중화 MIMO 기법의 적용 가능성을 제안한다. 2기의 위성이 2기의 지상국 안테나의 지향각 내에 위치하면서 각각의 영상 데이터를 동시에 지상국 안테나로 송신하는 경우 각각의 위성은 상대 안테나 이득에 따라 위성 상호 간 간섭으로 작용하며, 이는 추가적인 간섭 완화 조치 없이는 성능 저하를 초래할 수 있다. 이러한 성능 열화를 완화시키고자 공동 복조를 위해 공간 다중화 MIMO 기법을 적용하였다. 특히 지상 안테나에서 두 위성 간의 각도 차이에 의해 결정되는 상대 안테나 이득은 이중 교신 위성 시스템을 모델링하는데 있어서 중요한 역할을 한다. 안테나 이득의 수학적 모델로부터 계산된 안테나 이득을 포함한 MIMO 채널의 조건수 분석을 이용하였다. 모의실험 결과를 통해 ZF-SIC, MMSE-SIC 및 ML과 같은 다양한 검출 기법을 이용한 공간 다중화 MIMO 기법을 이중 교신 위성 시나리오에 적용할 수 있음을 제시하였다.

Keywords

References

  1. ECC Report 115: Use of the Frequency Band 8025-8400 MHZ by EESS, Ljubljana, January 2008 Electronic Communications Committee (ECC) within the European Conference of Postal and Telecommunications Administrations (CEPT).
  2. Park, D. J., Ahn, S. I., Chun, Y. S., and Kim, E. K., "Analysis of X-Band Link Performance Degradation Caused by Adjacent Satellite," Journal of Astronomy and Space Sciences, Vol. 28, No. 4, 2011, pp. 299-304. https://doi.org/10.5140/JASS.2011.28.4.299
  3. Atayero, A. A., Luka, M. K., Alatishe, A. A., "Satellite link design: A tutorial," International Journal of Electrical & Computer Sciences, Vol. 11, No. 4, 2011, pp. 1-6.
  4. Arapoglou, P.-D., Liolis, K., Bertinelli, M., Panagopoulos, A., Cottis, P., and Gaudenzi, R. D., "MIMO over satellite: a review," IEEE Communications Surveys & Tutorials, Vol. 13, No. 1, 2011, pp. 27-51. https://doi.org/10.1109/SURV.2011.033110.00072
  5. ITU Radiocommunication (ITU-R), Mathematical gain models of large-aperture space research service earth station antennas for compatibility analysis involving a large number of distributed interference sources [ITU-R REPORT SA.2098], 2007.
  6. Arapoglou, P.-D., Burzigotti, P., Bertinelli, M., Alamanac, A. B., and Gaudenzi, R. D., "To MIMO or Not To MIMO in Mobile Satellite Broadcasting Systems," Wireless Communications, IEEE Transactions on, Vol. 10, No. 9, Sep. 2011, pp. 2807-2811. https://doi.org/10.1109/TWC.2011.071411.101599
  7. Kyrolainen, J., Hulkkonen, A., Ylitalo, J., Byman, A., Shankar, B., Arapoglou, P.-D., and Grotz, J., "Applicability of MIMO to satellite communications," International Journal of Satellite Communications and Networking, Vol. 32, No. 4, 2014, pp. 343-357. https://doi.org/10.1002/sat.1040
  8. Schwarz, R. T., Knopp, A., Ogermann, D., Hofmann, C. A., and Lankl, B., "Optimum- Capacity MIMO Satellite Link for Fixed and Mobile Services," in Smart Antennas, 2008. WSA 2008. International ITG Workshop on Feb 2008, pp. 209-216.
  9. Martinan-Otero, D., and Mosquer, C., "Frequency Reuse in Dual Satellite Settings: an Initial Evaluation of Full Duplex Operation," in IEEE International Conference on Communications (ICC), London, UK, 8-12 June 2015.
  10. Foschini, G. J., and Gans, M. J., "On limits of wireless communications in a fading environments when using multiple antennas," Wireless Personal Communications, Vol. 6, 1998, pp. 311-335. https://doi.org/10.1023/A:1008889222784
  11. Benjebbour, A., Murata, H., and Yoshida, S., "Comparison of ordered successive receivers for space-time transmission," in Proc. IEEE VTS 54th Vehicular Technology Conference (VTC'01), Vol. 4, 2001, pp. 2053-2057.
  12. Rawat, A., and Gaur, S., "A Comparative Study of Equalization Techniques for MIMO Systems," International Journal of Digital Application & Contemporary research, Vol. 1, No. 3, October 2012.
  13. Telatar, E., "Capacity of multiantenna gaussian channels," Technical Memorandum, AT&T Bell Labratories, 1995.
  14. Tse, D., and Viswanath, P., Fundamentals of Wireless Communication, Cambridge University Press, New York, NY, USA, 2005.
  15. Xu, M. G., Gan, J. S., and Zhou, S. D.: "Log-likelihood Detection Ordering for MMSESIC in V-BLAST Systems," in: Proc. VTC'05- fall, Dallas, USA, Vol. 1, Sep. 2005, pp. 1-5.
  16. Park, H. W., and Kim, W. W., "BER Performance Analysis of X-Band Satellite Link employing MU-MIMO in Dual-Contact Scenario," APISAT 2016, Toyama, Japan, Oct. 25-27, 2016.
  17. Chae, T. B., Cho, C. B., Kwon, K. H., and Kim, D. Y., "The Design & Analysis of LEO Satellite Communication Link," Proceeding of The Korean Society for Aeronautical and Space Sciences Fall Conference, November 2002, pp. 572-575.
  18. Seo, I. H., Kim, B. J., Lee, J. J., and Kwak, S. W., "The design and performance analysis of RS(255,223) code for X-band downlink of STSAT-3," Journal of The Korean Society for Aeronautical & Space Sciences, Vol. 38, No. 2, 2010, pp. 195-199. https://doi.org/10.5139/JKSAS.2010.38.2.195