Showing 1-25 of 10,599 resultsfor "Index Terms":Massive Multiple-input Multiple-output
"Index Terms":Massive Multiple-input Multiple-output
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Massive MIMO Antenna Array Deployment for Airport in Air-to-Ground Communications
2018 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference (CSQRWC)
Year: 2018 | Conference Paper |
Cited by: Papers (1)
In this paper, a deployment of massive multiple-input multiple-output (MIMO) antenna array is proposed for the airport ground station in the air-to-ground communications, which is an integration of the centered massive MIMO and distributed MIMO. The proposed antenna deployment is discussed briefly and an example of forming multiple beams in different directions in horizontal plane and vertical pla...Show More
Spatially Correlated Channels for Dual-Polarized Massive MIMO Arrays: Characterization and Eigen-space Computation using IDM-CGF Method
2019 IEEE Indian Conference on Antennas and Propogation (InCAP)
Year: 2019 | Conference Paper |
In this paper, we demonstrate the potential of IDM-CGF (infinitesimal dipole modelling-cross-correlation Green's function) method in estimating the spatial correlation matrix for dual-polarized massive MIMO systems. A uniform rectangular array (URA) of 100 interleaved infinitesimal dipoles (IDs) with horizontal and vertical polarization is considered as test case, and its dominant Eigen-space is d...Show More
Channel Estimation using Parameter Analysis for massive MIMO Systems using Deep Learning
2024 Global Conference on Communications and Information Technologies (GCCIT)
Year: 2024 | Conference Paper |
mm-Wave and massive MIMO systems have emerged as feasible technologies for strengthening wireless communications performance by deploying numerous antennas at both the transmitter and receiving ends. Optimizing the performance of massive MIMO systems mandates reliable assessment of the channel characteristics. Conventional methods are not suitable for massive MIMO systems because of its complexity...Show More
Massive MIMO Array Design With High Isolation by Using Decoupling Cavity
This brief proposes an isolation enhancement method for massive multiple-input multiple-output arrays using decoupling cavities (DC). The proposed DC is made of a pure Polypropylene (PP) board, and an air cavity is engraved on it. The DC has high transmission in the normal direction and a high insertion loss in the tangential direction of the arrays, respectively. The DC operates with a broadband ...Show More
Dual-Band Dual-Polarized Massive MIMO Array for Maritime Applications
Jiahao Zhang;Kun Yang;Jin Meng;Wei Li;Egil Eide;Guy A. E. Vandenbosch
A dual-band dual-polarized massive multiple-input multiple-output (MIMO) antenna array is presented for maritime communications and sensing applications in the 5.1- and 5.9-GHz bands. Passive elements are introduced in the array to achieve a low-gain pattern variation in both bands. The optimal element spacing is studied, relying on the impact of mutual coupling and the radiation performance of th...Show More
An Electromagnetic Framework for the Deployment of Reconfigurable Intelligent Surfaces to Control Massive MIMO Channel Characteristics
2020 14th European Conference on Antennas and Propagation (EuCAP)
Year: 2020 | Conference Paper |
Cited by: Papers (14)
In this paper, we deploy a full-wave FDTD paradigm to investigate the effect of reconfigurable intelligent surface (RIS) – switchable frequency-selective surfaces (FSS) – on generic massive MIMO uplink channel’s eigenspace structure. We place an RIS based on two switchable FSS layers in the vicinity of a 64-element massive MIMO base-station (BS) array, serving a cluster of four fixed user equipmen...Show More
Bilinear Approximate Message Passing Based Off-grid Channel Estimation for Multi-user Millimeter-Wave MIMO System
2022 IEEE 96th Vehicular Technology Conference (VTC2022-Fall)
Year: 2022 | Conference Paper |
Cited by: Papers (1)
Massive multiple-input-multiple-output (MIMO) and millimeter-wave (mmWave) have been adopted as the enabling technologies for the 5G and beyond 5G (B5G) systems. However, due to the large number of antennas, it is hard to obtain the channel state information (CSI) which is essential for obtaining desirable beamforming gains. Off-grid error is one of the main limiting factors of the channel estimat...Show More
Design of Energy- and Cost-Efficient Massive MIMO Arrays
Antonio Puglielli;Andrew Townley;Greg LaCaille;Vladimir Milovanović;Pengpeng Lu;Konstantin Trotskovsky;Amy Whitcombe;Nathan Narevsky;Gregory Wright;Thomas Courtade;Elad Alon;Borivoje Nikolić;Ali M. Niknejad
Large arrays of radios have been exploited for beamforming and null steering in both radar and communication applications, but cost and form factor limitations have precluded their use in commercial systems. This paper discusses how to build arrays that enable multiuser massive multiple-input-multiple-output (MIMO) and aggressive spatial multiplexing with many users sharing the same spectrum. The ...Show More
Jamming Suppression for Uplink Massive MIMO Systems: A Semi-Blind Receiver Design
2022 IEEE/CIC International Conference on Communications in China (ICCC)
Year: 2022 | Conference Paper |
Cited by: Papers (2)
Jamming attack is a serious security threat for uplink massive multiple-input multiple-output (MIMO) systems. In this work, we advocate an efficient semi-blind jamming suppression method against powerful jamming. Concretely, we develop an expectation-maximization (EM) based algorithm to enhance the parameter estimation accuracy for the interference rejection combining (IRC) receiver. We jointly es...Show More
On Performance of multi-user Massive MIMO for 5G and Beyond
2022 IEEE 95th Vehicular Technology Conference: (VTC2022-Spring)
Year: 2022 | Conference Paper |
Cited by: Papers (4)
5G New Radio (NR) is the latest radio access technology (RAT) developed by 3GPP for the 5G mobile network. 5G NR and beyond is expected to play a key role in Cyber-Physical Systems as it will deliver significantly faster, more reliable and much lower latency connections to enable wireless control applications. 5G will support three fundamental application scenarios, enhanced Mobile BroadBand (eMBB...Show More
Performance of UFMC Waveform Design implemented in Massive MIMO system for 5th Generation Wireless Communication Systems
2022 4th International Conference on Advances in Computing, Communication Control and Networking (ICAC3N)
Year: 2022 | Conference Paper |
Cited by: Papers (1)
Next generation wireless network are intended to support heterogeneous networks and to meet the major challenge of coping with spectral efficiency (SE) to accommodate larger number of users with reduced complexity and latency. One way is to increase the number of antenna arrays at base station which can provide the multiplexing gain and reduced radio frequency (RF) chains. Massive multiple-input m...Show More
Design of Energy and Power Efficient Adaptive Beamforming Technique in Massive MIMO for 5G
2024 3rd Edition of IEEE Delhi Section Flagship Conference (DELCON)
Year: 2024 | Conference Paper |
Energy efficiency and Power efficiency are becoming crucial design parameters. In the present scenario, the extensive employment of MIMO (Multiple-Input Multiple-Output) will act as a crucial facilitator for the implementation of 5G technology. In the framework of wireless communication systems, (MIMO) technology involves, increased spectrum usage and power efficiency through the usage of a large ...Show More
A Low-Complexity Iterative Detection algorithm for Uplink Massive MIMO Systems
2023 14th International Conference on Information and Communication Technology Convergence (ICTC)
Year: 2023 | Conference Paper |
Linear minimum mean square error (MMSE) detector achieves nearly optimal performance for massive multiple-input multiple-output (MIMO) systems, but its complexity is significantly high because of the matrix inversion operations involved. Therefore, numerous iterative detectors along with their improved variants such as Gauss-Seidel (GS) have been introduced to tackle computational burden. In this ...Show More
Energy-Efficient Power Allocation for Non-Orthogonal Multicast and Unicast Transmission of Cell-Free Massive MIMO Systems
2020 International Symposium on Networks, Computers and Communications (ISNCC)
Year: 2020 | Conference Paper |
This work investigates energy-efficient power allocation for layered-division multiplexing (LDM) based non-orthogonal multicast and unicast transmission of cell-free massive multiple-input multiple-output systems. In particular, the achievable data rates for multicast and unicast services are derived. Based on the analytical results, a nonsmooth and nonconvex optimization problem for energy effici...Show More
Mutual Decoupling for Massive MIMO Antenna Arrays by Using Triple-Layer Meta-Surface
Shengyuan Luo;Yiming Zhang;Gert Frølund Pedersen;Shuai Zhang
The high isolation massive antenna arrays are the key devices in the base station of the future wireless communication systems. The challenge for the array application is how to reduce the coupling among the array elements. This paper introduces a new decoupling method for massive MIMO arrays with an inner-element distance of around half wavelength by using a triple-layer metasurface (TMS). The TM...Show More
A 3D geometry-based stochastic model for 5G massive MIMO channels
2015 11th International Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness (QSHINE)
Year: 2015 | Conference Paper |
Cited by: Papers (6)
Massive MIMO is one of the most promising technologies for the fifth generation (5G) mobile communication systems. In order to better assess the system performance, it is essential to build a corresponding channel model accurately. In this paper, a three-dimension (3D) two-cylinder regular-shaped geometry-based stochastic model (GBSM) for non-isotropic scattering massive MIMO channels is proposed....Show More
Multiple Fan-Beam Antenna Array for Massive MIMO Applications
In this paper, a multiple fan-beam antenna array is proposed for massive multiple-input multiple-output (MIMO) applications. The proposed array is based on vertical spatial filtering to reduce radio frequency complexity in a massive MIMO system. A microstrip line feeding network is utilized to achieve a specific phase distribution for multiple fan beams. A 64-element antenna array is designed and ...Show More
User-Centric Cell-Free Massive MIMO With RIS-Integrated Antenna Arrays
2024 IEEE 25th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)
Year: 2024 | Conference Paper |
Cited by: Papers (1)
Cell-free massive MIMO (multiple-input multiple-output) is a promising network architecture for beyond 5G systems, which can particularly offer more uniform data rates across the coverage area. Recent works have shown how reconfigurable intelligent surfaces (RISs) can be used as relays in cell-free massive MIMO networks to improve data rates further. In this paper, we analyze an alternative archit...Show More
Multiuser Correlation and Sum-Rate in Outdoor Measured Massive MIMO Channels
Anders Karstensen;Jesper Ø. Nielsen;Patrick C. F. Eggers;Elisabeth De Carvalho;Gert F. Pedersen;Martin Alm;Gerhard Steinböck
This letter analyzes the impact of interuser distance and angular separation on the channel correlation and achievable sum-rate for a massive multiple-input-multiple-output (MIMO) system in non-line-of-sight (NLOS) conditions. The investigation is based on outdoor measurements on a channel sounding system capturing the dynamic channel of two user arrays. The letter analyzes correlation and sum-rat...Show More
Fundamental Localization Limits of Quantized Uplink mmWave MIMO Systems in Moving Scenarios
2023 9th International Conference on Computer and Communications (ICCC)
Year: 2023 | Conference Paper |
In this paper, we present the Cramér-Rao bound (CRB) analysis regarding the estimation of user’s position and velocity in uplink millimeter wave (mmWave) massive multiple-input multiple-output (MIMO) systems, in which low-resolution analog-to-digital converters (ADCs) are implemented at the base station (BS). Specifically, we elaborately derive the Fisher Information matrices (FIMs) for not only t...Show More
Simultaneous Learning and Inferencing of DNN-Based mmWave Massive MIMO Channel Estimation in IoT Systems With Unknown Nonlinear Distortion
IEEE Internet of Things Journal
Cited by: Papers (9)
In this article, we propose an online training framework for deep neural network (DNN)-based mmWave massive multiple-input multiple-output (MIMO) channel estimation (CE) in Internet-of-Things (IoT) systems with nonlinear amplifier distortions. The DNN-based channel estimator is trained online in the IoT device based on real-time received pilot measurements from the base station (BS) without knowle...Show More
Diversity Order and Measure of MIMO Antennas in Single-User, Multiuser, and Massive MIMO Wireless Communications
Rakhesh Singh Kshetrimayum;Mohit Mishra;Sonia Aïssa;Shiban K. Koul;Mohammad S. Sharawi
In this letter, the diversity order (DO) and the diversity measure (DM) of multiple-input multiple-output (MIMO) antennas in generic single-user, multiuser, and massive MIMO wireless communications are calculated for several practical case studies. These performance metrics are calculated from the antenna correlation coefficient (ACC) matrix. The DO is calculated from the rank of the ACC matrix, a...Show More
3D Massive MIMO Systems: Modeling and Performance Analysis
Qurrat-Ul-Ain Nadeem;Abla Kammoun;Mérouane Debbah;Mohamed-Slim Alouini
Multiple-input-multiple-output (MIMO) systems of current LTE releases are capable of adaptation in the azimuth only. Recently, the trend is to enhance system performance by exploiting the channel's degrees of freedom in the elevation, which necessitates the characterization of 3D channels. We present an information-theoretic channel model for MIMO systems that supports the elevation dimension. The...Show More
Ray-based predictions of the outdoor-to-indoor massive MIMO channel
12th European Conference on Antennas and Propagation (EuCAP 2018)
Year: 2018 | Conference Paper |
Massive MIMO systems serve multiple users in the same time-frequency resource by utilizing large antenna arrays. A uniform linear array (ULA) containing 128 antenna elements is considered in an urban North American city environment with multiple user channels. The simulations are conducted with a ray-based tool with the latest enhancements of outdoor-to-indoor (O2I) channel prediction capabilities...Show More
Ray-based predictions of the outdoor-to-indoor massive MIMO channel
Year: 2018 | Conference Paper |
On The Performance of Multi-User Massive MIMO over mm wave Channels
2021 7th International Conference on Contemporary Information Technology and Mathematics (ICCITM)
Year: 2021 | Conference Paper |
Cited by: Papers (2)
Massive multiple-input multiple-output (MIMO) and Millimeter-wave (mmWave) techniques are the main factors that support modern wireless communications. Use of mmWave technology is a major factor in solving the problem of throttling congestion in the current bandwidth, as the use of mmWave leads to a significant increase in data rate, throughput and capacity. In this paper, we investigated and stud...Show More
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