Log-Likelihood-Ratio Ordered Successive Interference Cancellation in Multi-User, Multi-Mode MIMO Systems

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)837-839
Journal / PublicationIEEE Communications Letters
Issue number11
Publication statusPublished - Nov 2008
Externally publishedYes


Log-likelihood-ratio (LLR) ordered successive interference cancellation (SIC) scheme is analyzed in multi-user, multi-mode, multi-input multi-output (MIMO) systems in which each user may choose between two operation modes: spatial multiplexing or beamforming. The main idea is to detect and cancel the user signal in order of LLR which provides a posteriori information about the reliability of detection. The simulation results indicate that LLR-ordered SIC provides 1 ∼ 3 dB gain over the conventional SNR-ordered SIC in multiuser MIMO system and the gain increases with increasing number of users.

Research Area(s)

  • Log-likelihood ratio, Multi-user MIMO, Successive interference cancellation