Nathan J. Gomes
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View article: Ultra‐thin electromagnetic bandgap backed fractal geometry‐based antenna for 24 GHz ISM band WBAN
Ultra‐thin electromagnetic bandgap backed fractal geometry‐based antenna for 24 GHz ISM band WBAN Open
A compact, ultra‐thin electromagnetic bandgap (EBG) backed antenna is presented for the 24 GHz ISM band for WBAN applications. The proposed antenna has Koch fractal geometry‐based bow‐tie slots, designed with an overall dimension of 0.91 ×…
View article: A hybrid dynamic bandwidth allocation scheme operating with IACG and cooperative DBA for converged fronthaul networks
A hybrid dynamic bandwidth allocation scheme operating with IACG and cooperative DBA for converged fronthaul networks Open
The time-division multiplexed passive optical network is seen as a candidate for converged fronthaul networks in 5G, which requires low latency and high capacity. In this paper, a hybrid dynamic bandwidth allocation (DBA) scheme for conver…
View article: Integrating Radio-Over-Fiber Communication System and BOTDR Sensor System
Integrating Radio-Over-Fiber Communication System and BOTDR Sensor System Open
In this paper, we propose and experimentally demonstrate for the first time, the integration of a radio-over-fiber (RoF) communication system and a Brillouin optical time-domain reflectometry (BOTDR) distributed sensor system using a singl…
View article: Comparison of digital signal processing approaches for subcarrier multiplexed 5G and beyond analog fronthaul
Comparison of digital signal processing approaches for subcarrier multiplexed 5G and beyond analog fronthaul Open
Analog fronthaul transport architectures with digital signal processing at the end stations are promising, as they have the potential to achieve high spectral efficiencies, increased flexibility, and reduced latency. In this paper, two dig…
View article: 3D Beamforming Technologies and Field Trials in 5G Massive MIMO Systems
3D Beamforming Technologies and Field Trials in 5G Massive MIMO Systems Open
In this paper, three-dimensional (3D) beamforming characteristics and applications in fifth generation (5G) mobile communications have been studied by considering the physical structure of array antennas, and the properties of the 3D beam …
View article: A Flexible Subcarrier Multiplexing System With Analog Transport and Digital Processing for 5G (and Beyond) Fronthaul
A Flexible Subcarrier Multiplexing System With Analog Transport and Digital Processing for 5G (and Beyond) Fronthaul Open
A flexible subcarrier multiplexing system combining analog transport with digital domain processing is presented. By making use of band-pass sampling and applying a systematic mapping of signals into available Nyquist zones, the multiplexi…
View article: Exploiting Low Complexity Beam Allocation in Multi-User Switched Beam Millimeter Wave Systems
Exploiting Low Complexity Beam Allocation in Multi-User Switched Beam Millimeter Wave Systems Open
Switched-beam systems offer a promising solution for realizing multi-user communications at millimeter wave (mmWave) frequencies. A low-complexity beam allocation (LBA) algorithm has been proposed to solve the challenging problem of maximi…
View article: Radio technologies for 5G using Advanced Photonic Infrastructure for Dense user environments - D321 Report on Beam Steerable Directive Antennas
Radio technologies for 5G using Advanced Photonic Infrastructure for Dense user environments - D321 Report on Beam Steerable Directive Antennas Open
This deliverable reports the beam-steering architecture implementation in the RAPID 5G. Various beam-steering antenna methods are reviewed and several are chosen for implementation. The construction of the antenna for each of the chosen me…
View article: A Converged Evolved Ethernet Fronthaul for the 5G Era
A Converged Evolved Ethernet Fronthaul for the 5G Era Open
We assess the performance of two distinct functional splits based on latency/latency variation and mapping efficiency, both individually and in unison. By considering hardware-offloading possibilities for a low-layer split (especially a pr…
View article: Multi RAT (WiFi/LTE/5G) Mobile Network Featuring RoF Fronthaul, 60 GHz Beam-Switching and Mobile IP
Multi RAT (WiFi/LTE/5G) Mobile Network Featuring RoF Fronthaul, 60 GHz Beam-Switching and Mobile IP Open
We report on a public field trial demonstrating seamless handover in a multi Radio Access Technology mobile network supporting WiFi, LTE, and new 5G radio access in the 60 GHz band for full-duplex enhanced mobile broadband and 5G broadcast…
View article: Highly Efficient Optical Beam Steering Using an In-Fiber Diffraction Grating for Full Duplex Indoor Optical Wireless Communication
Highly Efficient Optical Beam Steering Using an In-Fiber Diffraction Grating for Full Duplex Indoor Optical Wireless Communication Open
Diffraction gratings have been widely used in wavelength-controlled non-mechanical laser beam steering for high data-rate indoor optical wireless communications (OWC). Existing free-space diffraction gratings suffer from inherent difficult…
View article: Analog Radio-Over-Fiber Supported Increased RAU Spacing for 60 GHz Distributed MIMO Employing Spatial Diversity and Multiplexing
Analog Radio-Over-Fiber Supported Increased RAU Spacing for 60 GHz Distributed MIMO Employing Spatial Diversity and Multiplexing Open
The improvements in coverage through spatial diversity and increased data rates through spatial multiplexing using a distributed Multiple-Input Multiple-Output (MIMO) system are important targets for future wireless communications. Here, t…
View article: Two Solutions of Soil Moisture Sensing with RFID for Landslide Monitoring
Two Solutions of Soil Moisture Sensing with RFID for Landslide Monitoring Open
Two solutions for UHF RFID tags for soil moisture sensing were designed and are described in this paper. In the first, two conventional tags (standard transponders) are employed: one, placed close to the soil surface, is the sensor tag, wh…
View article: Frequency Reuse of Beam Allocation for Multiuser Massive MIMO Systems
Frequency Reuse of Beam Allocation for Multiuser Massive MIMO Systems Open
Massive multiple-input-multiple-output (MIMO) has become a promising technique to provide high-data-rate communication in fifth-generation (5G) mobile systems, thanks to its ability to form narrow and high-gain beams. Among various massive…
View article: Joint User Selection and Energy Minimization for Ultra-Dense Multi-channel C-RAN with Incomplete CSI
Joint User Selection and Energy Minimization for Ultra-Dense Multi-channel C-RAN with Incomplete CSI Open
This paper provides a unified framework to deal with the challenges arising in dense cloud radio access networks (C-RAN), which include huge power consumption, limited fronthaul capacity, heavy computational complexity, unavailability of f…
View article: Joint Precoding and RRH Selection for User-Centric Green MIMO C-RAN
Joint Precoding and RRH Selection for User-Centric Green MIMO C-RAN Open
© 2002-2012 IEEE. This paper jointly optimizes the precoding matrices and the set of active remote radio heads (RRHs) to minimize the network power consumption for a user-centric cloud radio access network, where both the RRHs and users ha…
View article: Joint Precoding and RRH selection for User-centric Green MIMO C-RAN
Joint Precoding and RRH selection for User-centric Green MIMO C-RAN Open
This paper jointly optimizes the precoding matrices and the set of active remote radio heads (RRHs) to minimize the network power consumption (NPC) for a user-centric cloud radio access network (C-RAN), where both the RRHs and users have m…
View article: Switched Ethernet Fronthaul Architecture for Cloud-Radio Access Networks
Switched Ethernet Fronthaul Architecture for Cloud-Radio Access Networks Open
A fronthaul design for current and future mobile networks based on the transport of sampled radio signals from/to base station baseband processing units to/from remote radio heads (RRHs) is presented. The design is a pure-Ethernet switched…
View article: Low-Complexity Beam Allocation for Switched-Beam Based Multiuser Massive MIMO Systems
Low-Complexity Beam Allocation for Switched-Beam Based Multiuser Massive MIMO Systems Open
This paper addresses the beam allocation problem in a switched-beam based massive multiple-input-multiple-output (MIMO) system working at the millimeter wave frequency band, with the target of maximizing the sum data rate. This beam alloca…