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An Improved Detection Based on Lattice Reduction in MIMO Systems

In this paper, list detection based on lattice reduction (LDLR) in MIMO systems is proposed. By generating a list of candidate transmit symbol vectors we can improve the performance of linear detection based on lattice reduction and successive interference cancellation based on lattice reduction significantly. The performance improvement is demonstrated by computer simulations, which also show that a list with two entries is enough for the MMSE based detection to approach the maximum likelihood (ML) detection at high signal-to-noise ratio (SNR) in case of (4,4) MIMO