Preprint Article Version 1 This version is not peer-reviewed

On the Distribution of an Effective Channel Estimator for Multi-Cell Massive MIMO

Version 1 : Received: 13 August 2019 / Approved: 15 August 2019 / Online: 15 August 2019 (14:59:58 CEST)

How to cite: Pereira de Figueiredo, F.A.; Ferreira Dias, C.; Cardoso, F.A.C.M.; Fraidenraich, G. On the Distribution of an Effective Channel Estimator for Multi-Cell Massive MIMO. Preprints 2019, 2019080169 (doi: 10.20944/preprints201908.0169.v1). Pereira de Figueiredo, F.A.; Ferreira Dias, C.; Cardoso, F.A.C.M.; Fraidenraich, G. On the Distribution of an Effective Channel Estimator for Multi-Cell Massive MIMO. Preprints 2019, 2019080169 (doi: 10.20944/preprints201908.0169.v1).

Abstract

Accurate channel estimation is of utmost importance for massive MIMO systems to provide significant improvements in spectral and energy efficiency. In this work, we present a study on the distribution of a simple but yet effective and practical channel estimator for multi-cell massive MIMO systems suffering from pilot-contamination. The proposed channel estimator performs well under moderate to aggressive pilot contamination scenarios without previous knowledge of the inter-cell large-scale channel coefficients and noise power, asymptotically approximating the performance of the linear MMSE estimator as the number of antennas increases. We prove that the distribution of the proposed channel estimator can be accurately approximated by the circularly-symmetric complex normal distribution, when the number of antennas, M, deployed at the base station is greater than 10.

Subject Areas

massive MIMO; multi-cell; pilot-contamination; channel estimation

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