首页|Channel puncturing based low-complexity belief propagation detection for multi-user MIMO systems
Channel puncturing based low-complexity belief propagation detection for multi-user MIMO systems
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NETL
NSTL
万方数据
维普
A low complexity punctured belief propagation(BP)detection utilizing channel puncturing for multi-user multiple-input multiple-output(MU-MIMO)systems is proposed in this paper.This paper constructs a cycle-free factor graph by puncturing certain non-zero entries in a transformed channel matrix,and proposes an adjusted BP algorithm with a more exact a posteriori message updating equation.The proposed algorithm converges rapidly in several iterations due to the cycle-free structure in the factor graph.Nevertheless,puncturing brings distorted noise and thus leads to performance degradation.To tackle this issue,this article further designs a layered detection with the help of maximum likelihood detector(MLD).Simulations demonstrate that the proposed detection algorithm achieves the identical performance to MLD with much lower complexity.
Key Laboratory of Wireless-Optical Communications,Chinese Academy of Sciences,School of Information Science and Technology,University of Science and Technology of China,Hefei 230026,China
This work was supported bythe National Natural Science Foundation of China
NETL
NSTL
万方数据
维普
