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arXiv · 1412.2176

Multi-Branch Lattice-Reduction SIC for Multiuser MIMO Systems

L. Arevalo·R. C. de Lamare·R. Sampaio-Neto
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Abstract

In this paper, we propose a new detection technique for multiuser multiple-input multiple-output (MU-MIMO) systems. The proposed scheme combines a lattice reduction (LR) transformation, which makes the channel matrix nearly orthogonal, and then employs a multi-branch (MB) technique with successive interference cancellation (SIC). A single LR transformation is required for the receive filters of all branches in the scheme, which proposes a different ordering for each branch and generates a list of detection candidates. The best vector of estimated symbols is chosen according to the maximum likelihood (ML) selection criterion. Simulation results show that the proposed detection structure has a near-optimal performance while the computational complexity is much lower than that of the ML detector.

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L. Arevalo, R. C. de Lamare, R. Sampaio-Neto. 2014-12-05. Multi-Branch Lattice-Reduction SIC for Multiuser MIMO Systems. https://arxiv.org/abs/1412.2176

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