Results 1 to 10 of about 51,994 (258)
Pilot contamination reduction in massive MIMO systems based on pilot scheduling [PDF]
EURASIP Journal on Wireless Communications and Networking, 2018 The pilot contamination caused by sharing the non-orthogonal pilots among users is considered to be a bottleneck of the massive multi-input multi-output (MIMO) systems.
Yucheng Wu +4 more
doaj +2 more sources
On the Performance of TDD Massive MIMO Systems with Pilot Contamination [PDF]
2017 IEEE 85th Vehicular Technology Conference (VTC Spring), 2017 The pilot contamination problem is one of the major obstacles that limit the performance of time-division duplex (TDD) multi-cell massive multiple-input multiple-output (MIMO) systems. Pilot contamination results from the re-use of the same set of pilot sequences in the different cells of the system.
Emad Alsusa, Daniel K C So
exaly +2 more sources
Pilot contamination mitigation with reduced RF chains [PDF]
2017 IEEE 18th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), 2017 Massive multiple-input multiple-output (MIMO) communication is a promising technology for increasing spectral efficiency in wireless networks. Two of the main challenges massive MIMO systems face are degraded channel estimation accuracy due to pilot contamination and increase in computational load and hardware complexity due to the massive amount of ...
Shahar Stein Ioushua, Yonina C. Eldar
openaire +3 more sources
Joint User Clustering and Graph Coloring Based Pilot Assignment for Cell-Free Massive MIMO Systems
Sensors, 2023 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 pilot assignment scheme that employs user clustering and graph coloring ...
Xinyu Huang +4 more
doaj +1 more source
Superimposed Pilots Are Superior for Mitigating Pilot Contamination in Massive MIMO [PDF]
IEEE Transactions on Signal Processing, 2017 In this paper, superimposed pilots are introduced as an alternative to time-multiplexed pilot and data symbols for mitigating pilot contamination in massive multiple-input multiple-output (MIMO) systems. We propose a non-iterative scheme for uplink channel estimation based on superimposed pilots and derive an expression for the uplink signal-to ...
Vorobyov, Sergiy A. +3 more
openaire +3 more sources
An efficient location-based pilot assignment in Cell-Free Massive MIMO
ICT Express, 2023 Cell-free Massive multiple-input multiple-output can offer many degrees of freedom for the high data rate and coverage probability. This network topology is one of the cutting-edge technologies potentially applied for next-generation wireless ...
Tien Hoa Nguyen +2 more
doaj +1 more source
Channel Charting Aided Pilot Reuse for Massive MIMO Systems With Spatially Correlated Channels
IEEE Open Journal of the Communications Society, 2022 Massive multiple-input multiple-output (mMIMO) technology is a way to increase spectral efficiency and provide access to the Internet of Things (IoT) and machine-type communication (MTC) devices.
Lucas Ribeiro +4 more
doaj +1 more source
Exploring pilot assignment methods for pilot contamination mitigation in massive MIMO systems
Cogent Engineering, 2020 In massive multi-input multi-output (MIMO) antenna system, the performance is restricted by inter-cell interference called pilot contamination. However, acquisition of channel state information for channel estimation introduces overheads of pilots ...
Angelina Misso +2 more
doaj +1 more source
Biofiltration of Trichloroethylene-Contaminated Air: A Pilot Study [PDF]
Journal of the Air & Waste Management Association, 2003 This project demonstrated the biofiltration of a trichloroethylene (TCE)-contaminated airstream generated by air stripping groundwater obtained from several wells located at the Anniston Army Depot, Anniston, AL. The effects of several critical process variables were investigated to evaluate technical and economic feasibility, define operating limits ...
Laura W, Lackey +2 more
openaire +2 more sources
IEEE Access, 2020 In the multi-cell massive multiple-input multiple-output (MIMO) systems, the mitigation of pilot contamination is an important issue in the semi-blind channel estimations.
Cheng Hu, Hong Wang, Rongfang Song
doaj +1 more source