SMLD: Enhanced MIMO-Signal Detection for Wireless MIMO Communication Receivers

ETRI Journal

关键词: reverse ordering;    DFE;    ML;    MIMO;    SMLD;   

Others  :  1185586
DOI  :  10.4218/etrij.07.0206.0168

【 摘 要 】

This letter proposes a simplified maximum likelihood detection (SMLD) scheme to improve the detection performance of multiple-input multiple-output receivers. The SMLD detects V streams according to the first detected V sub-streams. Through an ML test, the most probable stream is selected. Moreover, to detect the layer with the worst post-detection SNR accurately, reverse ordering is applied to the SMLD. Simulation results show that the performance of the Vertical Bell Laboratories layered space-time (V-BLAST) system can be improved by adopting the SMLD technique. In the case of reverse ordering, the SMLD can achieve a similar ML performance with significant reduction in computational complexity.

   

【 参考文献 】

• [1]P.W. Wolniansky, G.J. Foschini, G.D. Golden, and R.A. Valenzuela, "V-BLAST: An Architecture for Achieving Very High Data Rate over Rich-Scattering Wireless Channels," Proc. of ISSSE ’98, Sept. 1998, pp. 295-300.
• [2]R. Bohnke, D. Wudden, and K. Kammeyer, "Reduced Complexity MMSE Detection for BLAST Architectures," Proc. of GLOBECOM 2003, Sept. 2003, pp. 2258-2262.
• [3]H. Kawai, K. Higuchi, N. Maeda, and M. Sawahashi, "Adaptive Control of Surviving Symbol Replica Candidates in QRM-MLD for OFDM MIMO Multiplexing," IEEE JSAC, vol. 24, no. 6, June 2006, pp. 1130-1140.