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Volume 32 Issue 1
Aug.  2010
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Xu Xiao-rong, Zheng Bao-yu, Cui Jing-wu, Xie Pei-zhong. A Novel Distributed VBLAST Adaptive DFE Algorithm in Cooperative MIMO[J]. Journal of Electronics & Information Technology, 2010, 32(1): 235-239. doi: 10.3724/SP.J.1146.2009.00117
Citation: Xu Xiao-rong, Zheng Bao-yu, Cui Jing-wu, Xie Pei-zhong. A Novel Distributed VBLAST Adaptive DFE Algorithm in Cooperative MIMO[J]. Journal of Electronics & Information Technology, 2010, 32(1): 235-239. doi: 10.3724/SP.J.1146.2009.00117

A Novel Distributed VBLAST Adaptive DFE Algorithm in Cooperative MIMO

doi: 10.3724/SP.J.1146.2009.00117
  • Received Date: 2009-01-21
  • Rev Recd Date: 2009-07-13
  • Publish Date: 2010-01-19
  • The significant problem for the implementation of distributed space-time encoding and decoding in multi-user cooperative MIMO is the adaptive space-time equalization algorithm with low detection complexity and fast convergence property. Space-time Decision Feedback Equalization (DFE) at multi-antenna receiver in Distributed Vertical Bell Labs Layered Space-Time (D-VBLAST) system is studied. RLS-MIMO-DFE detection algorithm based on Least Square (LS) criterion is proposed. Compared with other D-VBLAST detection algorithms such as Maximum Likelihood (ML)、Zero Forcing Ordered Successive Interference Cancellation (ZF-OSIC), the proposed algorithm has the unique property such as the fast convergence and the lower detection complexity. Theoretical derivation and simulated results show that, in D-VBLAST 22 system, although the performance of RLS-MIMO-DFE is a bit inferior to ML detection, the proposed algorithm could compromise the detection performance and computation complexity efficiently, and adapt to channel variation simultaneously. Thus it could satisfy real-time requirements for cooperative nodes in downlink channel.
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