mmWave Measurement of RF Reflectors for 5G Green Communications

Abstract

In recent years, with the energy consumption and environmental degradation, science and technology embarked on a path of sustainable development. In this situation, 5G green communication system has been widely used. This paper introduces the application of RF reflectors to 5G mmWave, where line-of-sight (LoS) blockage is a major hindrance for the coverage. In particular, we investigate the lab measurement of RF reflectors, which is a critical step from the theory to the practice. Furthermore, through the lab measurement, a 3D near-field range migration (RM) imaging algorithm for MIMO array configuration is proposed, and the sampling scheme is improved to save the computation time while providing high-quality images.

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

“…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 [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. The authors in [7] jointly optimized the transmit beamforming from an access point and the reflective beamforming in IR to maximize the received signal power at the user equipment (UE).…”

“…Meanwhile, the work in [9] studied the energy efficiency of reflector-assisted downlink communications. However, prior works on mmW reflectors in [3] and [6] focus mainly on experimental measurements, while the IR-related works in [7]- [9] study cellular communications over non-mmW spectrum. Furthermore, all of the prior works in [3] and [6]- [9] rely on passive reflectors placed at a fixed location, which cannot cope with the dynamic changes of mmW channels.…”

Effect of Multi-Frequency Beam Alignment on Non-Line-of-Site Vehicle to Infrastructure Communication using CI Model (CI-NLOS-V2I)

“…Mobile communications employing Millimeter wave (mmWave) is seen as a promising frequency band for the mobile, vehicular wireless networking as it is expected to have large spectrum. It is foreseen that it will have excellent potential in reaching extremely high data rates, which will exceed by far traditional cellular systems operating at sub-6 GHz bands [1][2][3][4].…”

Energy performance of 5G backhaul wireless network utilizing hybrid centric-distributed architecture

“…Whereas smart-phone devices have an extended battery capacity up to 2716 mAh for the iPhone X with wireless and fast charging features [1], the need for high energy performance in the network side has emerged as another significant aspect [2][3][4]. Particularly, in fifth-generation (5G) networks, the current major concern is the green communications without making a tradeoff with other performance metrics like spectrum efficiency (SE) and latency [5][6][7][8][9][10][11][12][13][14]. Millimeter wave (mm-wave) solution is adopted in concentrated-coverage base stations (BSs) for loading the massive backhaul traffic [15][16][17][18][19].…”