Low-complexity zero-forcing equalization for massive MIMO-OFDM

This poster has been accepted for presentation at the IEEE Communication Theory Workshop (IEEE CTW 2018 ), 15-16 May, 2018, Miramar Beach, Florida. Massive MIMO combined with OFDM are key techniques in the evolution of mobile communications. In this context, to the best of our knowledge, the channel estimation and the equalizers have never been jointly considered. We propose an alternative low-complexity method to compute the ZF equalizers, which consists of exchanging the order of the interpolation and computation of the equalizer. For massive MIMO, this strategy provides the same performance and considerably lower number of operations, compared to the traditional scheme. This work has been partly funded by projects MACHINE (TSI-100102-2015-17), ELISA (TEC2014-59255-C3-3-R) and TERESA-ADA (TEC2017-90093-C3-2-R) (MINECO/AEI/FEDER, UE).