Extended-list SQRD-based Decoder for Improving BER Performance in V-BLAST Systems

V-BLAST 시스템에서의 BER 성능 향상을 위한 Extended-list SQRD-based Decoder

  • ;
  • ;
  • 윤기완 (한국정보통신대학교 공학부)
  • Published : 2005.11.01

Abstract

In the QR Decomposition-based (QRD) decoding class, the system performance is sensitive to the error propagation. Thus, it is critical to correctly decode the previous layers. One apprach to desensitize the error propagation is to propose the optimal decoding order of layers. In this wort we propose a new extended-list Soled QRD-based (SQRD) decoding approach. In the proposed decoding scheme, the solution of the few first layers is extended as the list of promising possible solutions. By doing so, the diversity of the lowest layer is increased. As a result, the system performance is less sensitive to the error propagation than its counterparts. The proposed approach is verified by the computer simulation results.

QR Decomposition-based (QRD) decoding class에서는, 시스템 성능이 에러 전송에 민감하다. 그러므로 이전의 layer들을 정확하게 디코딩하는 것이 중요하다. 에러 전송에 민감하지 않도록 하는 접근 방법 중의 하나가 layer들의 최적 디코딩 order를 제안하는 것이다. 본 논문에서는 새로운 extended-list Sorted QRD-based (SQRD) 디코딩 접근 방법을 제안한다. 제안되는 디코딩 방법에는 약간의 첫째 layer들의 solution이 상당히 가능성 있는 solution들의 list로 확장된다. 이렇게 함으로 가장 낮은 layer의 diversity가 증가된다. 결과적으로 시스템 성능이 다른 것들의 에러 전송보다 덜 민감하게 된다. 제안되는 방법은 컴퓨터 시뮬레이션 결과로 증명된다.

Keywords

References

  1. Branka Vucetic and Jinhong Yuan, Space-Time Coding, 2003 edition, Wiley
  2. P.W. Wolniansky, G.J. Foschini, G.D. Golden and R.A. Valenzuela, 'VBLAST: An Architecture for Realizing Very High Data Rates Over the Rich-Scattering Wireless Channel', Signals, Systems, and Electronics, 1998. ISSSE 98. 1998 URSI International Symposium on 29 Sept.-2 Oct. 1998 Page(s):295-300
  3. D. Wubben, R. Bohnke, J. Rinas, V. Kuhn and K.D. Kammeyer, 'Efficient algorithm for decoding layered space-time codes', Electronics Letters, Vol.37, No.22, Oct. 2001, pp. 1348-1350 https://doi.org/10.1049/el:20010899
  4. Ronald Buhnke, Dirk Wubben, Volker Kuhn and Karl-Dirk Kammeyer, 'Reduced Complexity MMSE Detection for BLAST Architecture', GLOBECOM 2003, pp. 2258-2262
  5. Dirk Wubben, Ronald Bohnke, Volker Kuhn and Karl-Dirk Kammeyer, 'MMSE Extension of V-BLAST based on Sorted QR Decompotion', Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th Volume 1,6-9 Oct. 2003 Page(s): 508-512 Vol.1
  6. Phillip Conder and Tadeusz Wysocki, 'Increasing performance of SQRD decoding for LST systems', On the link www.elec.uow.edu.au/staff/wysocki/publications/ ConderWysocki.pdf, last access on Sept. 02, 2005
  7. V. Pammer, Y. Delignon, W. Sawaya and D. Boulinguez, 'A Low Complexity Suboptimal MIMO Receiver: The Combined ZF-MLD Algortihm', 14th IEEE 2003 International Symposium on Personal, Indoor and Mobile Communication, pp. 2271-2275
  8. Won-Joon Choi, Rohit Negi and John M. Cioffi, 'Combined ML and DFE Decoding for the V-BLAST Systems', Communications, 2000. ICC 2000. 2000 IEEE International Conference on Volume 3, 18-22 June 2000 Page(s):1243-1248 vol.3