A Method for Analyzing Broadcast Beamforming of Massive Mimo Antenna Array

Yuan, Hao; Cui, Guan-Feng; Fan, and Jin

doi:10.2528/pierl16063005

Cited by 5 publications

(4 citation statements)

References 14 publications

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“…A straightforward method to achieve good power utilization is to apply phase taper only, i.e., equal power per antenna. However, phase taper only often results in the resulting beam pattern having significant ripple [5], [6]. In addition, for a two antenna case phase taper can not be used at all since that will change the beampointing direction.…”

Section: Introductionmentioning

confidence: 99%

Power-Efficient Beam Pattern Synthesis via Dual Polarization Beamforming

Petersson

2020

2020 14th European Conference on Antennas and Propagation (EuCAP)

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Beamforming is traditionally associated with coherent summation of signals from antenna elements of the same polarization, here referred to as single polarization beamforming (SPBF). In this paper we focus on a new method, called dual polarization beamforming (DPBF), to design beam patterns. Instead of using only a single element-polarization, as for SPBF, a desired beam pattern is designed as the sum of powers for two orthogonal element-polarizations. So, with DPBF the focus is on total radiated power beam patterns. The DPBF technique provides additional degrees of freedom to form a desired beam pattern such that amplitude variations in the beamforming vector can often be significantly reduced, potentially to uniform amplitude. Phase-only beamforming, possibly using only minor amplitude variations, is a very interesting property, especially for active antennas, since it offers the potential of full power amplifier utilization. In this paper we apply DPBF to uniform linear arrays (ULAs) as well as uniform rectangular arrays (URAs). In communication systems, it is often desired to have a second beam with identical beam pattern but orthogonal polarization in all directions. We show how such beams are designed with DPBF, both for ULAs and URAs.

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Section: Introductionmentioning

confidence: 99%

Power-Efficient Beam Pattern Synthesis via Dual Polarization Beamforming

Petersson

2020

2020 14th European Conference on Antennas and Propagation (EuCAP)

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“…Some other works used dual-polarised antennas as in [7][8][9][10]. In [7], three layers of six sectors are stacked over one another with a rotation.…”

Section: Introductionmentioning

confidence: 99%

“…The isolation between different ports was 21 dB, and the gain for each subarray (1 × 4 patches) was between 11 and 12.4 dBi. A cross-dipole antenna element is used in [9] to get ±45 ∘ polarisations. Thirty-two RF channels with 64 antenna elements are used along the whole array to cover a band from 3.6 to 4.8 GHz with a gain of 26.8 dBi.…”

Section: Introductionmentioning

confidence: 99%

Massive MIMO antenna system for 5G base stations with directive ports and switched beamsteering capabilities

Al-Tarifi

Sharawi

Shamim

2018

IET Microwaves, Antennas & Propagation

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A 72 port (288 antennas) triangular shaped massive multiple-input-multiple-output (mMIMO) antenna system is presented for 5G base stations. Each side of the antenna system consists of 3 layers with a total size of 44.4×29.6×0.1524 cm 3 , and contains 24 ports. Each port (subarray) consists of 2×2 patches on the top layer, their feeding network with pre-calculated phases is on the bottom layer and the ground plane is in the middle one. Each subarray (one port) is fed in a way to tilt its beam direction with respect to others to achieve uncorrelated individual patterns. The antenna system is the first to support two operating modes; simultaneous individual port operation (i.e.72 port MIMO) and mMIMO array operation (i.e. with beam switching). The design is fabricated and measured to test its performance. The measured bandwidth is 100 MHz that covers the band from 3.45-3.55 GHz. The measured gain of a single port equals to 9.41 dBi. The envelop correlation coefficient does not exceed 0.1198. A beamsteering method to steer the beam of each 24-port side to different locations in the space is presented and applied based on the non-uniform port patterns (unlike most conventional methods using identical array elements). 13 switched beams are obtained with center angle coverage up to 34 o in elevation with maximum gain of 19.5 dBi.

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“…Large-scale antenna systems, also known as massive multiple-input multiple-output (MIMO), and mmwave communications are considered as the two main physical (PHY) layer key enabling techniques and promising candidate technologies, in order to address the requirements of the modern wireless communications [1][2][3]. These emerging systems include the fifth generation (5G) cellular networks and the associated infrastructures and subsystems, such as wireless backhaul, base station (BS), access point (AP), and user equipment (UE) units, and ultra-dense networks (UDNs) [4].…”

Section: Introductionmentioning

confidence: 99%

Design and Performance Analysis of Millimetre-Wave Rotman Lens-Based Array Beamforming Networks for Large-Scale Antenna Subsystems

Rahimian¹,

Alfadhl²,

Alomainy³

2017

PIER C

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Abstract-This paper presents the comprehensive analytical design and numerical performance evaluation of novel millimetre-wave (mm-wave) switched-beam networks, based on the Rotman lens (RL) array feeding concept. These passive array devices have been designed for operation in the 28-GHz frequency band, covering the whole 18-38 GHz frequency range. The primary objective of the work is to conduct a thorough feasibility study of designing wideband mm-wave beamformers based on liquid-crystal polymer (LCP) substrates, to be potentially employed as low-cost and high-performance subsystems for the advanced transceiver units and large-scale antennas. The presented RLs exhibit significant output behaviours for electronic beam steering, in terms of the scattering (S) parameters, phase characteristics, and surface current distributions, as the feeding systems' primary functionality indicators.

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A Method for Analyzing Broadcast Beamforming of Massive Mimo Antenna Array

Cited by 5 publications

References 14 publications

Power-Efficient Beam Pattern Synthesis via Dual Polarization Beamforming

Power-Efficient Beam Pattern Synthesis via Dual Polarization Beamforming

Massive MIMO antenna system for 5G base stations with directive ports and switched beamsteering capabilities

Design and Performance Analysis of Millimetre-Wave Rotman Lens-Based Array Beamforming Networks for Large-Scale Antenna Subsystems

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