1.3 Evolution of 5G mobile technology toward 1 2020 and beyond

Onoe, S.

doi:10.1109/isscc.2016.7417891

Cited by 80 publications

(35 citation statements)

References 4 publications

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“…If sub-6GHz and mm-wave BS are co-located, or their position and orientation relative to one another are known, the coarse-grained angle information for beamtraining of the mm-wave RF front-end can be derived easily, which significantly speeds up the initial access procedure. As a result, it is unrealistic to assume ubiquitous coverage with only mm-wave small cells, and it is envisioned that multiple radio access techniques (RATs) will co-exist in future cellular networks [11] [12].…”

Section: Introductionmentioning

confidence: 99%

Coverage Analysis and Load Balancing in HetNets With Millimeter Wave Multi-RAT Small Cells

Ghatak

Domenico

Coupechoux

2018

IEEE Trans. Wireless Commun.

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We characterize a two tier heterogeneous network, consisting of classical sub-6GHz macro cells, and multi Radio Access Technology (RAT) small cells able to operate in sub-6GHz and millimeter-wave (mm-wave) bands.For optimizing coverage and to balance loads, we propose a two-step mechanism based on two biases for tuning the tier and RAT selection, where the sub-6GHz band is used to speed-up the initial access procedure in the mmwave RAT. First, we investigate the effect of the biases in terms of signal to interference plus noise ratio (SINR) distribution, cell load, and user throughput. More specifically, we obtain the optimal biases that maximize either the SINR coverage or the user downlink throughput. Then, we characterize the cell load using the mean cell approach and derive upper bounds on the overloading probabilities. Finally, for a given traffic density, we provide the small cell density required to satisfy system constraints in terms of overloading and outage probabilities. Our analysis highlights the importance of deploying dual band small cells in particular when small cells are sparsely deployed or in case of heavy traffic.

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Section: Introductionmentioning

confidence: 99%

Coverage Analysis and Load Balancing in HetNets With Millimeter Wave Multi-RAT Small Cells

Ghatak

Domenico

Coupechoux

2018

IEEE Trans. Wireless Commun.

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“…Therefore, the sliding-IF architecture is very popular in mmWave systems [19,[21][22][23] . [2][3][4] . Moreover, with a large-scale antenna array, we can realize a large antenna array gain, compensating the large path loss associated with high frequency and increasing the coverage Accordingly, we can establish a stable wireless link.…”

Section: System Architecturementioning

confidence: 99%

The path to 5G: mmWave aspects

Niu

Chai

et al. 2016

J. Commun. Inf. Netw.

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Abstract:The wide spectrum and propagation characteristics over the air give mmWave communication unique advantages as well as design challenges for 5G applications. To increase the system speed, capacity, and coverage, there is a need for innovation in the RF system architecture, circuit, antenna, and package in terms of implementation opportunities and constraints. The discuss mmWave spectrum characteristics, circuits, RF system architecture, and their implementation issues are discussed.Moreover, the transmitter key components, i.e., the receiver, antenna, and packaging are reviewed. Considering the above facts, there has been much interest in 5G research from both academia and industry. It is expected that 5G wireless communication will be realized by 2020 or beyond.Compared to 4G systems, it is anticipated that 5G will achieve mobile traffic growth of 1 000X, 100 billion connected devices, etc. To achieve the above targets, several key technologies (e.g., massive MIMO(Multiple-InputMultiple-Output), ultra-dense networks, and all-spectrum access) will be used.

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“…Radar systems, mainly 3D Active Electronically Scanned Array (AESA), strongly supported by the latest achievements in information technology, bring new challenges to the designers of transmit/receive (T/R) modules, especially High-Power Amplifiers (HPAs) based on solid-state devices [1,2]. In addition, there are currently rapid advances in high-speed wireless technology, such as 5G [3][4][5][6][7][8][9]. In particular, the power amplifiers, as a key element of RF transmitters, directly and significantly affect the operation quality of modern wireless communication systems and new generation radars [2,3,9].…”

Section: Introductionmentioning

confidence: 99%

“…The same is true for the 5G and Long-Term Evolution Advanced (LTE-A) network systems which are using quadrature amplitude modulation (QAM) of higher orders and orthogonal frequency division multiplexing (OFDM) methods [11][12][13]. Both QAM and OFDM are particularly sensitive to transmittance changes generated mainly by output stages of base station transmitter power amplifiers [8][9][10][11][12][13]. Currently, such amplifiers must be linearized to meet wireless transmission standards defined e.g., by following parameters: in-band error vector magnitude (EVM), adjacent channel power ratio (ACPR), or the shape of spectrum mask [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

A GaN HEMT Amplifier Design for Phased Array Radars and 5G New Radios

2020

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Power amplifiers applied in modern active electronically scanned array (AESA) radars and 5G radios should have similar features, especially in terms of phase distortion, which dramatically affects the spectral regrowth and, moreover, they are difficult to be compensated by predistortion algorithms. This paper presents a GaN-based power amplifier design with a reduced level of transmittance distortions, varying in time, without significantly worsening other key features such as output power, efficiency and gain. The test amplifier with GaN-on-Si high electron mobility transistors (HEMT) NPT2018 from MACOM provides more than 17 W of output power at the 62% PAE over a 1.0 GHz to 1.1 GHz frequency range. By applying a proposed design approach, it was possible to decrease phase changes on test pulses from 0.5° to 0.2° and amplitude variation from 0.8 dB to 0.2 dB during the pulse width of 40 µs and 40% duty cycle.

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1.3 Evolution of 5G mobile technology toward 1 2020 and beyond

Cited by 80 publications

References 4 publications

Coverage Analysis and Load Balancing in HetNets With Millimeter Wave Multi-RAT Small Cells

Coverage Analysis and Load Balancing in HetNets With Millimeter Wave Multi-RAT Small Cells

The path to 5G: mmWave aspects

A GaN HEMT Amplifier Design for Phased Array Radars and 5G New Radios

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