Vertex graph-coloring-based pilot assignment with location-based channel estimation for massive MIMO systems

HT Dao, S Kim - IEEE Access, 2018 - ieeexplore.ieee.org
Massive multiple-input multiple-output (MIMO) is considered as a promising technique in
wireless communication systems, which contains cellular base stations equipped with a very …

Graph coloring based pilot allocation to mitigate pilot contamination for multi-cell massive MIMO systems

X Zhu, L Dai, Z Wang - IEEE Communications Letters, 2015 - ieeexplore.ieee.org
A massive multiple-input multiple-output (MIMO) system, which utilizes a large number of
base station (BS) antennas to serve a set of users, suffers from pilot contamination due to the …

Graph coloring based pilot assignment for cell-free massive MIMO systems

H Liu, J Zhang, S Jin, B Ai - IEEE Transactions on Vehicular …, 2020 - ieeexplore.ieee.org
An efficient pilot assignment scheme based on graph coloring is proposed to mitigate the
severe pilot contamination effect in cell-free massive multiple-input multiple-output systems …

Joint pilot allocation and pilot sequence optimization in massive MIMO systems

X Nie, F Zhao - IEEE Access, 2020 - ieeexplore.ieee.org
Pilot contamination (PC) is recognized as a bottleneck for the achievable throughput of multi-
cell massive multiple-input multiple-output (MIMO) systems. In this paper, we propose a joint …

Location-aware pilot allocation in multicell multiuser massive MIMO networks

N Akbar, S Yan, N Yang, J Yuan - IEEE Transactions on …, 2018 - ieeexplore.ieee.org
We propose a location-aware pilot allocation algorithm for a massive multiple-input multiple-
output (MIMO) network with high-mobility users, where the wireless channels are subject to …

Pilot Assignment for Cell-Free Massive MIMO: A Spectral Clustering Approach

L Zhang, S Yang, Z Han - IEEE Wireless Communications …, 2023 - ieeexplore.ieee.org
In this letter, we study the pilot assignment scheme in the uplink cell-free massive multiple-
input multiple-output system. To accurately depict the potential co-pilot interference (CPI) …

Pilot assignment based on weighted-count for cell-free massive MIMO systems

W Li, X Sun, D Chen - 2021 Asia-Pacific Conference on …, 2021 - ieeexplore.ieee.org
Cell-Free massive multiple-input multiple-output (MIMO), which is expected to become one
of the core technologies of the B5G and 6G, has attracted more and more researchers' …

Pilot allocation algorithm based on K-means clustering in cell-free massive MIMO systems

Y Hao, J Xin, W Tao, S Tao… - 2020 IEEE 6th …, 2020 - ieeexplore.ieee.org
In this letter, a pilot allocation algorithm based on K-means clustering is proposed for the cell-
free massive MIMO systems. Firstly, to avoid the communication between users and “invalid” …

Joint User Clustering and Graph Coloring Based Pilot Assignment for Cell-Free Massive MIMO Systems

X Huang, Y Wang, S Chen, Y Li, Y Wu - Sensors, 2023 - mdpi.com
Pilot contamination due to pilot reuse seriously mitigates the performance of the cell-free
massive multiple-input multiple-output (MIMO) systems. In this paper, we propose a joint …

Location-aware channel estimation enhanced TDD based massive MIMO

Z Wang, P Zhao, C Qian, S Chen - IEEE Access, 2016 - ieeexplore.ieee.org
Pilot contamination (PC) is a stumbling block in theway of realizing massive multi-input multi-
output (MIMO) systems. This contribution proposes a location-aware channel estimation …