Massive MIMO Wireless Networks: An Overview

Hassan, Noha; Fernando, Xavier

doi:10.3390/electronics6030063

Cited by 86 publications

(60 citation statements)

References 158 publications

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“…A way to support handover The massive MIMO network topology can theatrically support high-density traffic [46]. The theoretical performance and limitations of massive MIMO communications are extensively studied by a number of researchers [46][47][48].…”

Section: Handovermentioning

confidence: 99%

5G Ultra-Reliable Low-Latency Communication Implementation Challenges and Operational Issues with IoT Devices

2019

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To meet the diverse industrial and market demands, the International Telecommunication Union (ITU) has classified the fifth-generation (5G) into ultra-reliable low latency communications (URLLC), enhanced mobile broadband (eMBB), and massive machine-type communications (mMTC). Researchers conducted studies to achieve the implementation of the mentioned distributions efficiently, within the available spectrum. This paper aims to highlight the importance of URLLC in accordance with the approaching era of technology and industry requirements. While highlighting a few implementation issues of URLLC, concerns for the Internet of things (IoT) devices that depend on the low latency and reliable communications of URLLC are also addressed. In this paper, the recent progress of 3rd Generation Partnership Project (3GPP) standardization and the implementation of URLLC are included. Finally, the research areas that are open for further investigation in URLLC implementation are highlighted, and efficient implementation of URLLC is discussed.

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Section: Handovermentioning

confidence: 99%

5G Ultra-Reliable Low-Latency Communication Implementation Challenges and Operational Issues with IoT Devices

2019

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“…Standard MIMO networks tend to use two or four antennas in a single physical package. However, massive MIMO is a MIMO system with an especially high number of antennas [8]. A 2 × 2 MIMO system has been successfully applied for fourth generation (4G) mobile communications and it is expected that the massive MIMO system with a large number of MIMO antennas is very promising for 5G wireless communications [9].…”

Section: Introductionmentioning

confidence: 99%

Mobile-Phone Antenna Array with Diamond-Ring Slot Elements for 5G Massive MIMO Systems

et al. 2019

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A design of mobile-phone antenna array with diamond-ring slot elements is proposed for fifth generation (5G) massive multiple-input/multiple-output (MIMO) systems. The configuration of the design consists of four double-fed diamond-ring slot antenna elements placed at different corners of the mobile-phone printed circuit board (PCB). A low-cost FR-4 dielectric with an overall dimension of 75 × 150 mm2 is used as the design substrate. The antenna elements are fed by 50-Ohm L-shaped microstrip-lines. Due to the orthogonal placement of microstrip feed lines, the diamond-ring slot elements can exhibit the polarization and radiation pattern diversity characteristic. A good impedance bandwidth (S11 ≤ −10 dB) of 3.2–4 GHz has been achieved for each antenna radiator. However, for S11 ≤ −6 dB, this value is 3–4.2 GHz. The proposed design provides the required radiation coverage of 5G smartphones. The performance of the proposed MIMO antenna design is examined using both simulation and experiment. High isolation, high efficiency and sufficient gain-level characteristics have been obtained for the proposed MIMO smartphone antenna. In addition, the calculated total active reflection coefficient (TARC) and envelope correlation coefficient (ECC) of the antenna elements are very low over the whole band of interest which verify the capability of the proposed multi-antenna systems for massive MIMO and diversity applications. Furthermore, the properties of the design in Data-mode/Talk-mode are investigated and presented.

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“…Massive multiple-input multiple-output (MIMO) transmission technique has gained a lot of attention in recent decades [1][2][3][4][5][6][7][8][9][10][11][12][13], since it can achieve significant improvement in terms of the energy and spectral efficiency while using simple signal processing [1][2][3][4]. Massive MIMO systems prefer operating in the time division duplex (TDD) mode in which users must synchronously send mutually orthogonal pilot signals to the corresponding base station (BS) so that the BS can estimate the channels.…”

Section: Introductionmentioning

confidence: 99%

Multiple-Symbol Non-Coherent Detection for Differential QAM Modulation in Uplink Massive MIMO Systems

Dao

Kim

2019

Electronics

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In this paper, we propose a novel multiple-symbol detector based on maximum likelihood metric for differential quadrature amplitude modulation in massive multiple-input multiple-output (MIMO) systems. While current research on differential modulation in massive MIMO has focused on two consecutive symbols, our proposed detector is based on multiple-symbol, which is larger than or equal to two. Moreover, we derive new distance based on the proposed detector. To encode and decode data, we apply existing look-up table algorithm using the proposed distance, which is known as optimum encoding algorithm for differential modulation. Simulation results show the improvement based on the bit-error-rate performance since the proposed detector and distance vary according to the channel statistic information.

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Massive MIMO Wireless Networks: An Overview

Cited by 86 publications

References 158 publications

5G Ultra-Reliable Low-Latency Communication Implementation Challenges and Operational Issues with IoT Devices

5G Ultra-Reliable Low-Latency Communication Implementation Challenges and Operational Issues with IoT Devices

Mobile-Phone Antenna Array with Diamond-Ring Slot Elements for 5G Massive MIMO Systems

Multiple-Symbol Non-Coherent Detection for Differential QAM Modulation in Uplink Massive MIMO Systems

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