@inproceedings{4d688bd832764f5a96ab875683560912,
title = "Graph Coloring-Based Pilot Assignment for User-Cluster-Centric Cell-Free Massive MIMO Systems",
abstract = "A user-cluster-centric (UCC)-based cell-free massive multiple-input multiple-output (CF-mMIMO) system, which realizes multi-user multiplexing in each user-cluster formed by neighboring users and served by surrounding antennas, guarantees system scalability and improves the user capacity. However, accurate channel estimation is necessary for multi-user multiplexing. In this paper, we propose a graph coloring (GC)-based pilot assignment method to efficiently reuse the limited number of orthogonal pilots. It is verified by simulation that our proposed GC-based pilot assignment can effectively avoid pilot contamination.",
keywords = "Cell-free, graph coloring, pilot assignment, user-cluster",
author = "Sijie Xia and Qiang Chen and Fumiyuki Adachi",
note = "Publisher Copyright: {\textcopyright} 2024 IEEE.; 2024 IEEE VTS Asia Pacific Wireless Communications Symposium, APWCS 2024 ; Conference date: 21-08-2024 Through 23-08-2024",
year = "2024",
doi = "10.1109/APWCS61586.2024.10679280",
language = "English",
series = "2024 IEEE VTS Asia Pacific Wireless Communications Symposium, APWCS 2024",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "2024 IEEE VTS Asia Pacific Wireless Communications Symposium, APWCS 2024",
address = "United States",
}