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Iterative Receiver Combining IB-DFE with MRC for Massive MIMO Schemes

Fernandes, D. F. ; Cercas, F. ; Dinis, R.

Iterative Receiver Combining IB-DFE with MRC for Massive MIMO Schemes, Proc International Conference on Ambient Systems, Networks and Technologies Francisco António Bucho Cercas ANT, Funchal, Portugal, Vol. 1, pp. 1 - 5, May, 2017.

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Abstract
Once we are moving to the 5G system it is imperative to reduce the complexity of massive MIMO (Multiple-Input, Multiple Output) receivers. This paper considers the uplink transmission using massive MIMO combined with SC-FDE (Single-Carrier with Frequency-Domain Equalization). We propose an iterative frequency-domain receiver merging IB-DFE (Iterative Block Decision-Feedback Equalizer) with MRC (Maximal Ratio Combining). We propose a novel approach to reduce the complexity of the receiver by avoiding matrix inversions while maintaining a level of performance very close to the Matched Filter Bound (MFB), which makes it an excellent option for 5G systems.