Distributed Precoding Design for Cell-Free Massive MIMO Systems

We propose a distributed precoding design for downlink cell-free massive multiple-input multiple-output (MIMO) systems where the channel state information (CSI) exchange via backhaul signaling is entirely replaced by a novel over-the- air (OTA) signaling mechanism. The proposed method enjoys desirable flexibility and scalability properties, as the amount of OTA signaling does not scale with the number of base stations or user equipments. Numerical results show remarkable gains over uncoordinated precoding design, even after very few iterations. The proposed method may also outperform the centralized precoding design under realistic CSI acquisition.

Authors:
Gouda Bikshapathi, Atzeni Italo, Tölli Antti

Publication type:
A4 Article in conference proceedings

Place of publication:
21st IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2020

Keywords:
6G Publication

Published:

Full citation:
B. Gouda, I. Atzeni and A. Tölli, “Distributed Precoding Design for Cell-Free Massive MIMO Systems,” 2020 IEEE 21st International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Atlanta, GA, USA, 2020, pp. 1-5, doi: 10.1109/SPAWC48557.2020.9154279

DOI:
https://doi.org/10.1109/SPAWC48557.2020.9154279

Read the publication here:
http://urn.fi/urn:nbn:fi-fe2020113097422