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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
권호 표지

Spatial Multiplexing System based on Random Unitary Beamforming for MU-MIMO Broadcast Channel

다중사용자 다중송수신안테나 Broadcast 채널에서의 RUB 기반 공간다중화 시스템

  • 박성호 (고려대학교 통신시스템기술협동과정 통신시스템 연구실) ;
  • 박기홍 (고려대학교 전자전기공학과) ;
  • 이진희 (고려대학교 전자전기공학과) ;
  • 고영채 (고려대학교 전자전기공학과) ;
  • 김성진 (삼성종합기술원)
  • Published : 2010.02.28
Download PDF
⟨ Previous Next ⟩

Abstract

Random unitary beamforming (RUB) is a very low complexity and practical transmission scheme for multiuser MIMO broadcast channel. In this paper, we propose the scheme that obtains the spatial multiplexing gain on the extension of the conventional RUB, that is, the receiver with two antennas is compared to that with one antenna in a conventional RUB, which results in the increased capacity. So, we propose the new codebook and the minimum mean square error successive interference cancellation (MMSE-SIC) receiver filter. We show the simulation result that the sum-rate of proposed system is increased.

Random Unitary Beamforming (RUB) 은 다중사용자 다중안테나 broadcast 채널에서 매우 간단하면서도 실제적인 전송 기법이다. 본 논문에서는 일반적인 RUB의 형태를 확장시켜 공간다중화 이득을 얻을 수 있는 방법에 대해 고려하였다. 즉 수신기가 2개의 안테나를 가짐으로써 더 많은 데이터를 가지는 방법을 고려하였다. 이를 위해 송신기와 수신기의 새로운 코드북을 제안하고, 수신기에서 Minimum Mean Square Error Successive Interference Cancellation (MMSE-SIC) 기법을 사용함으로써 총 전송율이 증가함을 모의실험 결과를 통해 확인하였다.

Keywords

References

  1. M. Sharif, and B. Hassibi, "On the capacity of MlMO broadcast channels with partial side information", IEEE Trans. Inform. Theory, Vol. IT-51, No.2, pp.506-522, Feb. 2005.
  2. T. Yoo and A. Goldsmith, "On the optimality of multi-antenna broadcast scheduling using zero-forcing beamforming", IEEE J. Select. Areas Commun., Vol.24, No.3, pp.528-541, Mar. 2006.
  3. M. Costa, "Writing on dirty paper", IEEE Trans .Inform Theory, Vol.29, No.5, pp.439-441, May. 1983. https://doi.org/10.1109/TIT.1983.1056659
  4. P. Lu, H. C. Yang and Y. C. Ko, "Performance enhancement of random unitary beamforming based multiuser MIMO systems with optimum combining", Proc. of IEEE Global Commun. Conf. (GLOBECOM'2008) New Orleans, LA, USA, Nov. 2008.
  5. J. H. Winters, "Optimum combining in digital mobile radio with cochannel interference", IEEE Trans. Veh. Tech., Vol.33, No.3, pp. 144-155, Aug. 1984. https://doi.org/10.1109/T-VT.1984.24001
  6. E. villier, "Performance analysis of optimum combining with multiple interferers in flat Rayleigh fading", IEEE Trans. Commun., Vol. 47, No. 10, pp.1503-1510, Oct. 1999. https://doi.org/10.1109/26.795819