IB-DFE SIC based receiver structure for IA-precoded MC-CDMA systems. João, A., Assunção, J., Silva, A., Dinis, R., & Gameiro, A. In 2014 22nd European Signal Processing Conference (EUSIPCO), pages 1866-1870, Sep., 2014.
IB-DFE SIC based receiver structure for IA-precoded MC-CDMA systems [pdf]Paper  abstract   bibtex   
Interference alignment (IA) is a promising technique that allows high capacity gains in interfering channels. On the other hand, iterative frequency-domain detection receivers based on the IB-DFE concept (Iterative Block Decision Feedback Equalization) can efficiently exploit the inherent space-frequency diversity of the MIMO MC-CDMA systems. In this paper we design a joint iterative IA precoding at the transmitter with IB-DFE successive interference cancellation (SIC) based receiver structure for MC-CDMA systems. The receiver is designed in two steps: first a linear filter is used to mitigate the inter-user aligned interference, and then an iterative frequency-domain receiver is designed to efficiently separate the spatial streams in the presence of residual inter-user aligned interference at the output of the filter. Our scheme achieves the maximum degrees of freedom provided by the IA precoding, while allowing an almost optimum space-diversity gain, with performance close to the matched filter bound (MFB).

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