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Article Dans Une Revue IEEE Transactions on Vehicular Technology Année : 2008

Space time turbo equalization with successive interference cancellation for multipath coded MIMO channels

Résumé

This paper addresses the issue of iterative space-time equalization for multiple input multiple output (MIMO) frequency selective fading channels. A new soft equalization concept based on successive interference cancellation (SIC) is introduced for a space-time bit interleaved coded modulation (STBICM) transmission. The proposed equalizer allows to separate intersymbol interference (ISI) and multi-antenna interference (MAI) functions. Soft ISI is successively suppressed using a low-complexity sub-optimum minimum mean square error (MMSE) criterion. The decoupling of ISI and MAI offers more flexibility in the design of the whole space-time equalizer. Different multi-antenna detection criteria can be considered, ranging from simple detectors to the optimal maximum a-posteriori (MAP) criterion. In particular, we introduce two soft equalizers called SIC/SIC and SIC/MAP, and we show that they can provide a good performance/complexity trade-off for many system configurations, compared with other turbo equalization schemes. The paper also introduces an MMSE-based iterative channel state information (CSI) estimation algorithm, and shows that attractive performance can be achieved when the proposed soft-SIC space-time equalizer iterates with the MMSE-based CSI estimator.
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Dates et versions

hal-01862137 , version 1 (27-08-2018)

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Tarik Ait Idir, Samir Saoudi, Najib Naja. Space time turbo equalization with successive interference cancellation for multipath coded MIMO channels. IEEE Transactions on Vehicular Technology, 2008, 57 (5), pp.2766 - 2778. ⟨10.1109/TVT.2007.914061⟩. ⟨hal-01862137⟩
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