Massive multiple-input multiple-output (MIMO) combined with orthogonal frequency division multiplexing (OFDM) are key techniques in the evolution of mobile communications. In coherent demodulation schemes, the computation of zero-forcing (ZF) equalizers can be very complex, in particular when the number of subcarriers and/or antennas is high. In the context of massive MIMO, we propose the combination of using Neumann series (NS) as a low-complexity approximation to obtain the matrix inversions with the interpolation of the inverted matrix, that, to the best of our knowledge, have never been analyzed in this context. We will show that when the number of antennas at the base station (BS) is larger than the number of users, our proposed scheme has the same performance as the traditional one, with lower complexity. We also provide some numerical results in order to verify our analysis.
Low-Complexity Computation of Zero-Forcing Equalizers for Massive MIMO-OFDM
2019-04-01
245701 byte
Conference paper
Electronic Resource
English
Noise Analysis of Zero-Forcing Nonlinear Equalizers for Coherent WDM Systems
British Library Online Contents | 2019
Noise Analysis of Zero-Forcing Nonlinear Equalizers for Coherent WDM Systems
British Library Online Contents | 2019
Noise Analysis of Zero-Forcing Nonlinear Equalizers for Coherent WDM Systems
British Library Online Contents | 2019