Multi-Beam MIMO Prototype for Real-Time Multiuser Communication at 28 GHz

Brady, John; Hogan, John V. L.; Sayeed, A.M.

doi:10.1109/glocomw.2016.7848964

Cited by 22 publications

(11 citation statements)

References 15 publications

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“…The other method is to develop the phased array with high precision and low cost phase shifting network (PSN) for HBF system [17]. There exist many advanced phased array architectures proposed for HBF [18]- [22], such as the passive multi-beam array in [18], [19], the lens-based Butler matrix multi-beam array [20] and the active phased array [21], [22]. Among them, when putting passive beam switching circuits between the RF front-end and antenna, the passive multibeam array or Butler matrix based array introduce extra noise and insertion loss, which will reduce the dynamic range and decrease the coverage distance of the transceiver.…”

Section: Introductionmentioning

confidence: 99%

A High-Precision Hybrid Analog and Digital Beamforming Transceiver System for 5G Millimeter-Wave Communication

et al. 2019

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In this paper, the development of a millimeter-wave hybrid beamforming (HBF) transceiver system for 5G millimeter-wave multiple-input-multiple-output (MIMO) communication is presented. The developed transceiver system is operated at 28-GHz band in the time division duplex (TDD) mode, with 500-MHz signal bandwidth. To implement high beamforming accuracy, a phased-array-based HBF transceiver with high-precision phase shifting network (PSN) at intermediate-frequency (IF)-paths is proposed. The designed PSN has 8-bit phase resolution within 360 • range and 0.13-dB amplitude variation. With the use of such low-cost 8-bit PSN, this HBF transceiver system achieves 0.6 • beam resolution and a good RF transceiver performance. In addition, under the over-the-air MIMO communication test with two data streams, the error vector magnitude (EVM) of the received signals at two user equipment (UE) is 2.58% and 2.34%. The high-data rate millimeter-wave communication and MIMO performance of this HBF are verified.

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Section: Introductionmentioning

confidence: 99%

A High-Precision Hybrid Analog and Digital Beamforming Transceiver System for 5G Millimeter-Wave Communication

et al. 2019

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“…As shown in Fig. 23, the authors in [142] presented a prototype of the lens array that consists of four main components: 1) FPGA-based DSP back-end and ADCs, 2) RF chains. 3) beam selector, and 4) front-end lens array.…”

Section: Beamspace Mimomentioning

confidence: 99%

Prospective Beamforming Technologies for Ultra-Massive MIMO in Terahertz Communications: A Tutorial

Ning¹,

Tian²,

Chen³

et al. 2021

Preprint

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Terahertz (THz) communications with a frequency band 0.1 − 10 THz are envisioned as a promising solution to the future high-speed wireless communication. Although with tens of gigahertz available bandwidth, THz signals suffer from severe freespreading loss and molecular-absorption loss, which limit the wireless transmission distance. To compensate the propagation loss, the ultra-massive multiple-input-multiple-output (UM-MIMO) can be applied to generate a high-gain directional beam by beamforming technologies. In this paper, a tutorial on the beamforming technologies for THz UM-MIMO systems is provided. Specifically, we first present the system model of THz UM-MIMO and identify its channel parameters and architecture types. Then, we illustrate the basic principles of beamforming via UM-MIMO and introduce the schemes of beam training and beamspace MIMO for THz communications. Moreover, the spatial-wideband effect and frequency-wideband effect in the THz beamforming are discussed. The joint beamforming technologies in the intelligent-reflectingsurface (IRS)-assisted THz UM-MIMO systems are introduced. Further, we present the corresponding fabrication techniques and illuminate the emerging applications benefiting from THz beamforming. Open challenges and future research directions on THz UM-MIMO systems are finally highlighted.

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“…However, directional antennas with narrow beams are unsuitable for multiuser mobile communications as they provide only limited spatial coverage [ 6 , 9 , 20 ]. Moreover, directional beams need to be steered either electronically or mechanically to obtain a better substitute link for non-LOS communications [ 4 , 7 , 9 , 13 , 14 , 15 , 16 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ]. Therefore, major obstacles for the implementation of commercial mm-wave systems on a large scale are their high cost and compromised performance [ 9 , 10 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

Review of Recent Phased Arrays for Millimeter-Wave Wireless Communication

Naqvi

Lim

2018

Sensors

124

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Owing to the rapid growth in wireless data traffic, millimeter-wave (mm-wave) communications have shown tremendous promise and are considered an attractive technique in fifth-generation (5G) wireless communication systems. However, to design robust communication systems, it is important to understand the channel dynamics with respect to space and time at these frequencies. Millimeter-wave signals are highly susceptible to blocking, and they have communication limitations owing to their poor signal attenuation compared with microwave signals. Therefore, by employing highly directional antennas, co-channel interference to or from other systems can be alleviated using line-of-sight (LOS) propagation. Because of the ability to shape, switch, or scan the propagating beam, phased arrays play an important role in advanced wireless communication systems. Beam-switching, beam-scanning, and multibeam arrays can be realized at mm-wave frequencies using analog or digital system architectures. This review article presents state-of-the-art phased arrays for mm-wave mobile terminals (MSs) and base stations (BSs), with an emphasis on beamforming arrays. We also discuss challenges and strategies used to address unfavorable path loss and blockage issues related to mm-wave applications, which sets future directions.

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Multi-Beam MIMO Prototype for Real-Time Multiuser Communication at 28 GHz

Cited by 22 publications

References 15 publications

A High-Precision Hybrid Analog and Digital Beamforming Transceiver System for 5G Millimeter-Wave Communication

A High-Precision Hybrid Analog and Digital Beamforming Transceiver System for 5G Millimeter-Wave Communication

Prospective Beamforming Technologies for Ultra-Massive MIMO in Terahertz Communications: A Tutorial

Review of Recent Phased Arrays for Millimeter-Wave Wireless Communication

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