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A PDF estimation-based iterative MIMO signal detection with unknown interference

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3 Author(s)
Veselinovic, N. ; Centre for Wireless Commun., Univ. of Oulu, Finland ; Matsumoto, T. ; Juntti, M.

The equivalent diversity order of iterative minimum mean squared error (MMSE) multiuser detectors for multiple input multiple output (MIMO) channels is decreased if they aim at suppressing unknown cochannel interference (UCCI) while detecting multiple users' signals. In this letter, we propose a new MIMO signal detection scheme with the aim to preserve the detector's diversity order by estimating the probability density function of the UCCI plus background noise. It is shown that the proposed detector significantly outperforms the conventional detector based on UCCI's covariance matrix estimation.

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Communications Letters, IEEE  (Volume:8 ,  Issue: 7 )