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3D Antenna Structures Using Uniform Triangular Arrays for Efficient Full-Directional Multiuser Transmission
2019
International Journal of Antennas and Propagation
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Using antenna structures with multiple UTA panels, multiuser transmission performance is evaluated to demonstrate the effectiveness of the proposal. ...
In order to increase the system capacity of the 5G mobile communication system, multiple-input multiple-output (MIMO) transmission techniques using a large-scale array over the millimeter-wave band have ...
We determine the set of beamforming vectors using the geometry of the antenna locations, which can be used for tilting transmitted beams from the UTA of an arbitrary size. ...
doi:10.1155/2019/4150378
fatcat:ldcjddfgs5f2fpfautt7vzh63y
Vertical Sectorization Techniques in MISO Downlink Active Antenna Systems
MISO 하향 능동 안테나 시스템에서의 수직 섹터분할 기법
2015
The Journal of Korean Institute of Communications and Information Sciences
MISO 하향 능동 안테나 시스템에서의 수직 섹터분할 기법
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In the AAS, antenna beam patterns can be adjusted in each sector and multiple vertical beams can form the vertical sectorization. ...
Next, by using the result in the single sector transmission, the single sector based algorithm is proposed. ...
Due to the complicated antenna beam pattern, it is hard to find the optimal tilt angles. ...
doi:10.7840/kics.2015.40.6.997
fatcat:pzol2caepbcevo4r7x4mh4dms4
Introduction to the Issue on Hybrid Analog–Digital Signal Processing for Hardware-Efficient Large Scale Antenna Arrays (Part II)
2018
IEEE Journal on Selected Topics in Signal Processing
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is the Vice-President of Network Fabric Research, Nokia Bell Labs, Murray Hill, NJ, USA, leading teams innovating in all aspects of IP and optical solutions for core, metro, submarine, and data center communications ...
The reader architecture comprises two panel antennas that are tilted between them to form the monopulse tilted-array configuration required for the radar-type DoA estimation. ...
In the paper titled "DFT-based Hybrid Beamforming Multiuser Systems: Rate Analysis and Beam Selection", the authors Yu Han, Shi Jin, Jun Zhang, Jiayi Zhang, and Kai-Kit Wong propose an analog Discrete ...
doi:10.1109/jstsp.2018.2833636
fatcat:sem44gdvcjavpmdjryoapzsdym
Impact of Antenna and Propagation on Wireless Communication Technology: Terminal, Base Station, and Channel Modeling
2013
International Journal of Antennas and Propagation
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However, the antenna has been tilted in order to compensate the beam deviation caused by the edge diffraction. ...
For wireless communication, the antennas at both sides of the wireless chain and the corresponding propagation characteristics play an important role in the system design and optimization. ...
However, the antenna has been tilted in order to compensate the beam deviation caused by the edge diffraction. ...
doi:10.1155/2013/368457
fatcat:ex3kuminvzgcbfvqgtwggqt7ni
A Novel Multi-User Codebook Design for 5G in 3D-MIMO Heterogeneous Networks
2018
Electronics
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The 2D precoding technology can only adjust the beam in a horizontal direction through data processing, which will cause serious problems for multiuser systems, especially at the edge of the base station ...
Based on the deployment of a uniform planar array (UPA) at the base station, a 3D-MIMO multiuser codebook design scheme based on horizontal transmission angle and the vertical down-tilt angle is proposed ...
The improved codebook study still uses the DFT codebook in the horizontal direction and uses the distribution characteristics of the vertical down tilt in the vertical direction. ...
doi:10.3390/electronics7080144
fatcat:3x5rfo2a2bgepj6w7bxnlmaroy
Interference-Avoidance Techniques: Improving Ubiquitous User Experience
2012
IEEE Vehicular Technology Magazine
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The difference between these types of nodes is mainly the physical and logical channels they use to communicate with the core network. ...
Test drives were done for different settings of the down-tilts of the antenna array. The down-tilts of the antennas have been varied between 0° and 18° with a step size of 3°. ...
He worked on smart antenna systems, high speed uplink packet access, LTE and LTE A. ...
doi:10.1109/mvt.2012.2218434
fatcat:m277w5u4gjgarc6h37uwtf5c4u
Spectrum Sharing in Cognitive Radio Prop up the Minimum Transmission Power and Maxi-Min SINR Stratagem
2013
Research Journal of Applied Sciences Engineering and Technology
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With the rapid growth of vigilance that cognitive radio participate an essential task in wireless communication to resolve the spectrum scarcity vs. under-utilization dilemma owing to the dormant spectrum ...
INTRODUCTION Key spectrum allocation tilt for conservative wireless communication services is due to rigid spectrum allocation policy. ...
Due to increase in the fast data communication the antenna diversity schemes are used which enables the reliable links between the source and the destination (Alamouti, 1998; Tarokh et al., 2002; Jafarkhani ...
doi:10.19026/rjaset.6.3546
fatcat:6d5p6anegfakjjly3xyu5wvdw4
Towards 5th generation cellular mobile networks
2014
Australian Journal of Telecommunications and the Digital Economy
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Cellular mobile networks have enabled ubiquitous communications and largely changed the way we live and work. ...
to random and dense small cells, and provide an indepth discussion on potential enabling techniques for the next generation (5G) cellular networks, particularly massive MIMO and multiband base-station antennas ...
above the main beam and minimise the interference to adjacent cells, (4) the ability to tilt the main beam in the elevation plane by values in the range of 1 to 10 degrees through electrical or mechanical ...
doi:10.7790/ajtde.v2n2.34
fatcat:43ixpaqptzdybafodcglgnakwq
Performance analysis of multiuser dual-hop satellite relaying systems
2019
EURASIP Journal on Wireless Communications and Networking
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In this study, we investigate the outage probability (OP) of a multiuser dual-hop satellite relaying system with decode-and-forward (DF) protocol, where both uplink and downlink experience Shadowed Rician ...
Specifically, by taking the effects of antenna pattern and path loss into account, we first establish a practical satellite channel model and obtain the end-to-end signal-to-noise ratio (SNR) expression ...
θ 3 dB 2 , SLL where ϕ 3 dB and θ 3 dB are the 3 dB beamwidth of the horizontal and vertical patterns, respectively, θ tilt the main beam tilting angle, SLL the side-lobe level of the antenna pattern. ...
doi:10.1186/s13638-019-1471-8
fatcat:ejc4zrznfjdu3jwcp7bkcnbdem
Spectral efficiency of multi-user millimeter wave systems under single path with uniform rectangular arrays
2017
EURASIP Journal on Wireless Communications and Networking
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(BS) to serve multiple single-antenna users. ...
In this paper, we investigate the downlink achievable ergodic spectral efficiency (SE) of a single-cell multi-user millimeter wave system, in which a uniform rectangular array is used at the base station ...
Acknowledgements We would like to thank the anonymous reviewers for their insightful comments on the paper, as these comments led us to an improvement of the work. ...
doi:10.1186/s13638-017-0966-4
fatcat:jppgcv7gdrew7bnup5doek5mh4
Resource Allocation for Maximizing Spectral Efficiency in a Multiuser MFSK System
2022
Journal of Communication and Information Systems
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is available and a fixed number of receiving antennas are present at the base station. ...
In this paper we explore strategies to improve the spectral efficiency values of a multiuser M-ary Frequency Shift Keying (MFSK) system when a fast and frequency selective fading channel with limited bandwidth ...
Actually, they resemble the patterns of commercial sector antennas used for cellular communications. ...
doi:10.14209/jcis.2022.13
fatcat:zy5i3fexuvcfpnai6fsmaxn5d4
Interference Mitigation Framework for Cellular Mobile Radio Networks
2013
International Journal of Antennas and Propagation
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For today's cellular mobile communication networks, the needed capacity is hard to realize without much more of (expensive) bandwidth. Thus new standards like LTE were developed. ...
The proposed framework is more than CoMP and includes techniques like interference rejection combining (IRC), multiuser MIMO (MU-MIMO), interference floor shaping, wideband beamforming, antenna tilting ...
Residual intercooperation area interference is reduced by a suitable combination of wideband (WB) beamforming and per WB beam individual vertical antenna tilting. ...
doi:10.1155/2013/645929
fatcat:zgbem4oetbaulbwtwrsz2iiwfi
Achievable Sum Rate Analysis of ZF Receivers in 3D MIMO Systems
2014
KSII Transactions on Internet and Information Systems
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Using the lower bound as a starting point, we pursue the "large-system" analysis and derive a closed-form expression when the number of antennas grows large for fixed average transmit power and fixed total ...
be reduced by exploiting antenna vertical gain and degree of freedom, respectively. ...
Recently, multiuser MIMO (MU-MIMO) system, where the base station is equipped with multiple antenna elements and simultaneously communicates with several co-channel users, has gained much attention [1 ...
doi:10.3837/tiis.2014.04.012
fatcat:zn4wfgvcuvdfjh2vo6cn7n2w3e
Use of learning, game theory and optimization as biomimetic approaches for Self-Organization in macro-femtocell coexistence
2012
2012 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)
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Numerical results show that the proposed analytical solution can enhance wireless backhaul capacity of the OFR based femtocells by adapting the macro base station (BS) antenna tilts in a distributed and ...
In this paper, we present the use of several Biomimetic approaches for Self Organization (SO) in heterogeneous scenarios where macrocell and femtocell networks coexist. ...
G is the antenna gain and for 3GPP and LTE and LTE-A it can be modeled as in [13] i.e. represents beamwidth and λ is weighting factor to weight horizontal and vertical beam pattern of the antenna in ...
doi:10.1109/wcncw.2012.6215470
dblp:conf/wcnc/ImranBG12
fatcat:rci4wi6w7jgprkeupdpkzhtzhm
Sum Rate Analysis of MU-MIMO with a 3D MIMO Base Station Exploiting Elevation Features
2015
International Journal of Antennas and Propagation
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Although the three-dimensional (3D) channel model considering the elevation factor has been used to analyze the performance of multiuser multiple-input multiple-output (MU-MIMO) systems, less attention ...
This work can be seen as the first attempt to analyze the sum rate performance for high-rise buildings in modern city and used as a reference for infrastructure. ...
through the peak of the beam and horizontal plane. ...
doi:10.1155/2015/318123
fatcat:5f37fp6dynhfxj7rteebbafft4
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