Nonlinear Equalizer for Multi-User Hybrid mmW Massive MIMO Systems

Roberto Magueta, Daniel Castanheira, Adao Silva, Rui Dinis, Atilio Gameiro

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


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.

Original languageEnglish
Title of host publication2017 IEEE 85th Vehicular Technology Conference, VTC Spring 2017 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)978-1-5090-5932-4
Publication statusPublished - 14 Nov 2017
Event85th IEEE Vehicular Technology Conference, VTC Spring 2017 - Sydney, Australia
Duration: 4 Jun 20177 Jun 2017


Conference85th IEEE Vehicular Technology Conference, VTC Spring 2017


  • Hybrid analog/digital architectures
  • Iterative block equalization
  • Massive MIMO
  • Millimeter wave communications

Fingerprint Dive into the research topics of 'Nonlinear Equalizer for Multi-User Hybrid mmW Massive MIMO Systems'. Together they form a unique fingerprint.

Cite this