Results 211 to 220 of about 52,737 (255)
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Self-Contamination for Detection of Pilot Contamination Attack in Multiple Antenna Systems
IEEE Wireless Communications Letters, 2015In a time-division duplex (TDD) multiple antenna system, the channel state information (CSI) can be acquired using reverse training. A pilot contamination attack occurs when during the training phase, an adversary also sends identical training (pilot) signal as that of the legitimate receiver.
Jitendra Tugnait
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On Channel Estimation for Massive MIMO With Pilot Contamination
IEEE Communications Letters, 2015This letter proposes a simple channel estimator for a multi-cell massive MIMO system with pilot contamination. Under moderate or strong pilot contamination, the existing least square (LS) channel estimator suffers from substantial performance degradation while the existing minimum mean square error (MMSE) channel estimator offers much improved ...
Hlaing Minn
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Proactive Eavesdropping via Pilot Contamination and Jamming
Wireless Personal Communications, 2017Proactive eavesdropping is a new paradigm shift in wireless physical layer security from preventing conventional eavesdropping attacks to legitimate intercepting suspicious communications, which has attracted a lot of attention recently. Pilot contamination is one effective technique in proactive eavesdropping, which spoofs the suspicious transmitter ...
Guangchi Zhang, Miao Cui
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Pilot Contamination with MITM Attack
2017 IEEE 85th Vehicular Technology Conference (VTC Spring), 2017Existing studies on the secret key generation based on physical layer wireless fading channel are largely open under active attacks. In this paper, we discuss how the man-in-the- middle (MITM) attacker, who acts as a transparent relay, attacks the training phase in wireless communication to improve the information leaked rate.
Yu Huang +4 more
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Superimposed pilots: An alternative pilot structure to mitigate pilot contamination in massive MIMO
2016 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2016Superimposed pilots are proposed as an alternative to time-multiplexed pilot and data symbols for mitigating pilot contamination in massive multiple-input multiple-output systems. Provided that the uplink duration is larger than the total number of users in the system, superimposed pilots enable each user to be assigned a unique pilot sequence, thereby
Vorobyov, Sergiy A. +3 more
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Pilot-scale bioremediation of PAH-contaminated soils
Applied Biochemistry and Biotechnology, 1997The Institute of Gas Technology (IGT) conducted a pilot-scale study at a former manufactured gas plant (MGP) site in New Jersey. The objective of the study was to determine the effectiveness of an innovative chemical/biological treatment process (MGP-REM process) to remediate soils contaminated with polynuclear aromatic hydrocarbons (PAHs). In order to
S P, Pradhan +4 more
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HOW TO EXPLOIT MOBILITY TO MITIGATE PILOT CONTAMINATION?
2018 IEEE Global Conference on Signal and Information Processing (GlobalSIP), 2018To tackle the uplink pilot contamination problem in massive multiple-input multiple-output (MIMO) systems, current researches only relied on the angle of arrival at the base station. However, this information is insufficient when the users share the same scattering environment. In this paper, we propose a novel strategy by exploiting the user mobility.
Xiaoyu Zhang 0005 +4 more
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Superimposed Pilots are Beneficial for Mitigating Pilot Contamination in Cell-Free Massive MIMO
IEEE Communications Letters, 2021In this letter, we present the first study for uplink cell-free massive multi-input multi-output (MIMO) systems with superimposed pilots (SPs). Closed-form linear minimum mean square error (LMMSE) channel estimation and achievable spectral efficiency (SE) expressions with maximal ratio combining (MRC) receiver filters are derived.
Yao Zhang 0016 +3 more
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Massive MIMO with clustered pilot contamination precoding
2013 Asilomar Conference on Signals, Systems and Computers, 2013In this paper, a practical approach to pilot contamination precoding (PCP) for massive MIMO is proposed through a joint clustering and pilot reuse scheme. We also introduce power scaling to enforce per-base station (BS) power constraints. We consider a massive MIMO system, where uncoordinated conventional beamforming is implemented in each cell.
Mahmood Mazrouei-Sebdani +1 more
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