An Effective Coverage Scheme With Passive-Reflectors for Urban Millimeter-Wave Communication

Peng, Zhangyou; Li, Linxiao; Wang, Miao; Zhang, Zhonghao; Liu, Qi; Liu, Yang; Liu, Ruoran

doi:10.1109/lawp.2015.2447734

Cited by 60 publications

(46 citation statements)

References 9 publications

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“…These make approximately {135°, 0°, 90°} phase shifts from the first one to the third stub; respectively. This causes wider beam when the link communication needs the nonline‐of‐sight (NLoS) states based on the 5G wireless system . The distance between stubs can also be changed in a little determined range to improve the performance of the proposed antenna.…”

Section: Antenna Structure and Design Methodologymentioning

confidence: 99%

“…This causes wider beam when the link communication needs the nonline-ofsight (NLoS) states based on the 5G wireless system. 9,10 The distance between stubs can also be changed in a little determined range to improve the performance of the proposed antenna. In this research, we optimized the distance between stubs with different values in order to achieve impedance matching.…”

Section: Antenna Structure and Design Methodologymentioning

confidence: 99%

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A wideband millimeter‐wave antenna based on quasi‐Yagi antenna with MIMO circular array antenna beamforming for 5G wireless networks

Nouri

Aghdam

Jafarieh

et al. 2019

Micro & Optical Tech Letters

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In this letter, a wideband printed antenna and its arrays for 5G wireless cellular systems have been proposed. The proposed antenna is like the Yagi‐Uda antenna which fed by an optimized microstrip line. The single antennas have two kinds of bandwidth. In broadband case, it has |S11| < −10 dB with an impedance bandwidth of 47% (24.8‐40 GHz) and a range gain of 6.3‐8.9 dBi. In multiband case, it covers two licensed bandwidths for 5G systems (27‐29 GHz and 36‐40 GHz) and a range gain of 7.2‐7.9 dBi. Furthermore, by optimizing the constructive interference between the patches and the aperture, a relatively high antenna gain even with a wide beamforming across an azimuthal plane with the merits of the average gain equal 10.5 dBi could be obtained. The measurement results showed that the proposed antenna and array antenna have stable radiation patterns, low cross‐polarization, and high gain, exhibiting potential use for the applications of 5G wireless communication systems.

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Section: Antenna Structure and Design Methodologymentioning

confidence: 99%

Section: Antenna Structure and Design Methodologymentioning

confidence: 99%

A wideband millimeter‐wave antenna based on quasi‐Yagi antenna with MIMO circular array antenna beamforming for 5G wireless networks

Nouri

Aghdam

Jafarieh

et al. 2019

Micro & Optical Tech Letters

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“…This is because that the network size is determined by the inter-site distance (ISD). ISD has been set to 150 in order to simulate dense network scheme in mmWave which help compensate for the high path loss at this band [30,41,42]. Therefore, with our chosen 600 m 2 ROI, there are only seven sites that "fit" in the ROI, expanding the ROI will insure more sites in the simulation but will NOT affect the result, as the ISD is the same.…”

Section: Scheduling and Fairness With Rrusmentioning

confidence: 99%

Improved Capacity and Fairness of Massive Machine Type Communications in Millimetre Wave 5G Network

Al-Falahy

Alani

2018

Computers

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Abstract:In the Fifth Generation (5G) wireless standard, the Internet of Things (IoT) will interconnect billions of Machine Type Communications (MTC) devices. Fixed and mobile wearable devices and sensors are expected to contribute to the majority of IoT traffic. MTC device mobility has been considered with three speeds, namely zero (fixed) and medium and high speeds of 30 and 100 kmph. Different values for device mobility are used to simulate the impact of device mobility on MTC traffic. This work demonstrates the gain of using distributed antennas on MTC traffic in terms of spectral efficiency and fairness among MTC devices, which affects the number of devices that can be successfully connected. The mutual use of Distributed Base Stations (DBS) with Remote Radio Units (RRU) and the adoption of the millimetre wave band, particularly in the 26 GHz range, have been considered the key enabling technologies for addressing MTC traffic growth. An algorithm has been set to schedule this type of traffic and to show whether MTC devices completed their traffic upload or failed to reach the margin. The gains of the new architecture have been demonstrated in terms of spectral efficiency, data throughput and the fairness index.

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“…To overcome these drawbacks of mmW, signal reflectors have been recently proposed to bypass obstacles and prolong the communication range [3]. In particular, by using reflectors, a non-line-of-sight (NLOS) mmW link can be compensated by creating multiple, connected line-of-sight (LOS) links, thus significantly reducing the mmW channel attenuation.…”

Section: Introductionmentioning

confidence: 99%

“…Several recent works have studied the use of IRs to enhance the performance of cellular networks such as in [3] and [6]- [9]. In [3], the design of a passive reflector and the estimation of the reflection gain are presented for urban mmW communications. In [6], simulations and experiments are carried out in indoor environments to measure the transmission of passive reflectors over mmW.…”

Section: Introductionmentioning

confidence: 99%

Reflections in the Sky: Millimeter Wave Communication with UAV-Carried Intelligent Reflectors

Zhang

Saad

Bennis

2019

2019 IEEE Global Communications Conference (GLOBECOM)

148

150

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In this paper, a novel approach that uses an unmanned aerial vehicle (UAV)-carried intelligent reflector (IR) is proposed to enhance the performance of millimeter wave (mmW) networks. In particular, the UAV-IR is used to intelligently reflect mmW beamforming signals from a base station towards a mobile outdoor user, while harvesting energy from mmW signals to power the IR. To maintain a line-of-sight (LOS) channel, a reinforcement learning (RL) approach, based on Q-learning and neural networks, is proposed to model the propagation environment, such that the location and reflection coefficient of the UAV-IR can be optimized to maximize the downlink transmission capacity. Simulation results show a significant advantage for using a UAV-IR over a static IR, in terms of the average data rate and the achievable downlink LOS probability. The results also show that the RL-based deployment of the UAV-IR further improves the network performance, relative to a scheme without learning.

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An Effective Coverage Scheme With Passive-Reflectors for Urban Millimeter-Wave Communication

Cited by 60 publications

References 9 publications

A wideband millimeter‐wave antenna based on quasi‐Yagi antenna with MIMO circular array antenna beamforming for 5G wireless networks

A wideband millimeter‐wave antenna based on quasi‐Yagi antenna with MIMO circular array antenna beamforming for 5G wireless networks

Improved Capacity and Fairness of Massive Machine Type Communications in Millimetre Wave 5G Network

Reflections in the Sky: Millimeter Wave Communication with UAV-Carried Intelligent Reflectors

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