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Nonlinear Equalizer for Multi-User Hybrid mmW Massive MIMO Systems | IEEE Conference Publication | IEEE Xplore

Nonlinear Equalizer for Multi-User Hybrid mmW Massive MIMO Systems


Abstract:

The aim of this manuscript is to propose a new hybrid nonlinear block space-time receiver structure for millimeter wave (mmW) systems, to efficiently separate the spatial...Show More

Abstract:

The aim of this manuscript is to propose a new hybrid nonlinear block space-time receiver structure for millimeter wave (mmW) systems, to efficiently separate the spatial streams. We consider a fully connected analog-digital architecture. We assume that both the transmitter and the receiver are equipped with a large antenna array and the number of radio frequency (RF) chains is lower than the number of antennas. The analog and digital parts of the equalizer are jointly optimized using as a metric the mean square error (MSE) between the transmitted data vector and its estimate after the digital equalizer. The specificities of the analog domain impose several constraints in the joint optimization. To efficiently deal with the constraints the analog part is selected from a dic-tionary based on the array response vectors. The performance results have shown that the performance of our hybrid nonlinear space-time equalizer is close to the fully digital counterpart after only a few iterations. Moreover, it clearly outperforms the linear receivers recently proposed for hybrid mmW massive MIMO architectures.
Date of Conference: 04-07 June 2017
Date Added to IEEE Xplore: 16 November 2017
ISBN Information:
Conference Location: Sydney, NSW, Australia

References

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