Journal of the Institute of Electronics Engineers of Korea TC (대한전자공학회논문지TC)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Throughput of V-BLAST System using Hybrid ARQ in Correlated Fading Channels

상관된 페이딩 채널에서 하이브리드 ARQ를 사용하는 V-BLAST 시스템의 수율

  • 김봉회 (LG전자 이동통신기술연구소) ;
  • 황승훈 (동국대학교 전자공학과)
  • Published : 2008.01.25
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Abstract

In this paper, an antenna-switching scheme using negative acknowledgement for hybrid automatic repeat request (H-ARQ) is proposed and analyzed in the Vertical Bell Labs Layered Space-Time(V-BLAST) system, in which the transmit antenna is alternatively switched under retransmission. By analytically evaluating the channel capacity of the proposed scheme over correlated fading channels, it is shown that the adverse effect of the channel correlation is alleviated by the antenna switching scheme. Simulation results demonstrate that the average throughput may be improved in a correlated fading channel without adding much complexity to the process.

본 논문에서는 H-ARQ를 위한 NACK 신호를 이용한 안테나 스위칭 방식을 제안하고 V-BLAST 시스템에서 분석하였다. 여기서 전송 안테나는 재전송시 번갈아 스위칭 되어 동작한다. 상관된 페이딩 채널에서 제안된 방식의 채널 용량을 해석적으로 분석함으로써, 채널 상관성의 악영향이 안테나 스위칭 방식으로 줄어듦을 보인다. 시뮬레이션 결과를 통해 상관된 페이딩 채널에서 평균 수율은 큰 복잡도의 증가 없이 개선되어질 수 있음을 보인다.

Keywords

References

  1. G. J. Foschini, and M. J. Gans, 'On limits of wireless communications in a fading environment when using multiple antennas', Wireless Personal Communications, 1998, (6), pp. 315-335
  2. G. J, Foschini, G. D. Golden, R. A. Valenzuela, and P. W. Wolnianski, 'Simplified processing for high spectral efficiency wireless communication employing multi-element arrays', IEEE J. Select. Areas Commun., 1999, 17, (11), pp. 1841-1852 https://doi.org/10.1109/49.806815
  3. D. Gesbert, H, Bolcskei, D. Gore, and A. Paulraj, 'MIMO wireless channels: capacity and performance prediction', Proc. IEEE Globecom, November, 2000, pp. 1083-1088
  4. D. Shiu, G. J. Foschini, M. J. Gans, and J. M. Kahn, 'Fading correlation and its effect on the capacity of multi-element antenna systems', IEEE Trans. Commun., 2000, 48, (3), pp. 502-513 https://doi.org/10.1109/26.837052
  5. D. Chase, 'Code combining- a maximum likelihood decoding approach for combining an arbitrary number of noisy packets', IEEE Trans. Comm., 1985, 33, (5), pp. 385-393 https://doi.org/10.1109/TCOM.1985.1096314
  6. S.-H. Hwang, B. Kim, and Y.-S. Kim, 'A hybrid ARQ scheme with power ramping', Proc. IEEE Vehic. Technol. Conf., January 2001, pp. 1579-1583
  7. 3GPP R1-01-0621, HARQ scheme with power ramping, 2001. (ftp://ftp.3gpp.org)
  8. A. Hottinen, O. Tirkkonen, and R. Wichman, 'Multi-antenna Tranceiver Techniques for 3G and Beyond' (Wiley, 2003)