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 …

A game theoretic approach for pilot contamination avoidance in massive MIMO

H Ahmadi, A Farhang, N Marchetti… - IEEE Wireless …, 2015 - ieeexplore.ieee.org
In this letter, we investigate the pilot contamination problem in massive MIMO networks from
a system level point of view. We propose two game-theoretic approaches that model the …

Adaptive pilot clustering in heterogeneous massive MIMO networks

R Mochaourab, E Björnson… - IEEE Transactions on …, 2016 - ieeexplore.ieee.org
We consider the uplink of a cellular massive multiple-input multiple-output network.
Acquiring channel state information at the base stations (BSs) requires uplink pilot signaling …

Uplink pilot design for multi-cell massive MIMO networks

Y Han, J Lee - IEEE Communications Letters, 2016 - ieeexplore.ieee.org
In massive multiple-input multiple-output (MIMO) systems, the effect of inter-user interference
and noise can be suppressed through simple signal processing techniques. However, pilot …

Pilot allocation for multi-cell TDD massive MIMO systems

W Hao, O Muta, H Gacanin… - 2017 IEEE 86th Vehicular …, 2017 - ieeexplore.ieee.org
Pilot contamination due to the pilot reuse in adjacent cells is a serious problem in time-
division duplex (TDD) massive multi-input multiple-output (MIMO) system. Therefore, the …

Uplink pilot allocation for multi-cell massive MIMO systems

W Hao, O Muta, H Gacanin… - IEICE Transactions on …, 2019 - search.ieice.org
Pilot contamination due to pilot reuse in adjacent cells is a very serious problem in massive
multi-input multiple-output (MIMO) systems. Therefore, proper pilot allocation is essential for …

Grassmannian training for massive MIMO cellular networks

Y Han, J Lee - 2016 50th Asilomar Conference on Signals …, 2016 - ieeexplore.ieee.org
Massive multiple-input multiple-output (MIMO) systems are one of key technologies for next
generation cellular providing high spectral efficiency. While the effect of most interference …

Time-shifted Pilot-based Scheduling with Adaptive Optimization for Pilot Contamination Reduction in Massive MIMO

AP Kumar, T Srinivasulu - Journal of Telecommunications and Information …, 2020 - jtit.pl
Massive multiple-input multiple-output (MIMO) is considered to be an emerging technique in
wireless communication systems, as it offers the ability to boost channel capacity and …

Pilot hop** algorithm for massive multiple‐input multiple‐output

AH Mehana, AS Alwakeel - IET Communications, 2018 - Wiley Online Library
In this study, the authors develop a pilot assignment algorithm to alleviate the effect of pilot
contamination over time‐varying channels. They study the effect of correlated channel states …

Pilot design and allocation for multi-cell massive MIMO systems with two-tier receiving

A Hu - IEEE Transactions on Vehicular Technology, 2020 - ieeexplore.ieee.org
This paper investigates pilot design and allocation in multi-cell massive multiple-input
multiple-output systems with two-tier receiving. As the length of pilot is limited, the pilots …