A5047511546- graph theory and CDMA systems
- Advanced Photonic Communication Systems
- Coding theory and cryptography
- Optical Network Technologies
- Optical Wireless Communication Technologies
- Photonic and Optical Devices
- Wireless Communication Networks Research
- Millimeter-Wave Propagation and Modeling
- Radio Frequency Integrated Circuit Design
- Terahertz technology and applications
- Wireless Body Area Networks
- Advanced Optical Network Technologies
- Orbital Angular Momentum in Optics
- Advanced Wireless Communication Technologies
- Multiple Myeloma Research and Treatments
- Satellite Communication Systems
- Telecommunications and Broadcasting Technologies
- Microwave Engineering and Waveguides
- UAV Applications and Optimization
- Molecular Communication and Nanonetworks
- Advanced Combinatorial Mathematics
- Plasmonic and Surface Plasmon Research
- Semiconductor Quantum Structures and Devices
- Optical and Acousto-Optic Technologies
- IoT and Edge/Fog Computing
Universidad de Málaga
2022-2024
Universidade Federal do ABC
2020-2023
Eindhoven University of Technology
2018-2021
Universidade de São Paulo
2011-2017
Vrije Universiteit Brussel
2017
Technical University of Denmark
2015-2016
Consejo Superior de Investigaciones Científicas
2014
Universidade Estadual de Campinas (UNICAMP)
2012
Abstract The sixth generation (6G) mobile systems will create new markets, services, and industries making possible a plethora of opportunities solutions. Commercially successful rollouts involve scaling enabling technologies, such as cloud radio access networks, virtualization, artificial intelligence. This paper addresses the principal technologies in transition towards next networks. convergence 6G key-performance indicators along with evaluation methodologies use cases are also...
In this paper, we propose a new hybrid network solution based on asynchronous optical code-division multiple-access (OCDMA) and free-space (FSO) technologies for last-mile access networks, where fiber deployment is impractical. The architecture of the proposed OCDMA-FSO thoroughly described. users in fully manner by means assigned fast frequency hopping (FFH)-based codes. FSO receiver, an equal gain-combining technique employed along with intensity modulation direct detection. New analytical...
Wireless connectivity and photonic-wireless links in data centers allow fast deployment dynamic reconfigurability. Technological advances millimeter sub-THz communications will soon go beyond 5G trigger 6G systems. We present how could benefit from such technologies, particularly assuring flexibility adaptability, without compromising scalability.
This article presents a detailed survey on both asynchronous and synchronous Optical Code-Division Multiple-Access (OCDMA) systems based 1-D, 2-D, 3-D codes, distinctively. Accordingly, different coding schemes along with their multiplexing capacity, correlation features, advantages drawbacks are addressed benchmarked. Additionally, detection techniques such as direct coherent capability to handle Multiple Access-Interference also discussed. Furthermore, the main OCDMA from last two decades...
High data rate coverage, security, and energy efficiency will play a key role in the continued performance scaling of next-generation mobile systems. Dense, small cells based on novel network architecture are part answer. Motivated by recent mounting interest free-space optical (FSO) technologies, this paper addresses fronthaul FSO, spread spectrum codes, graphene modulators for creation dense cells. The uses an energy-efficient modulator to send bits be coded with codes achieving higher...
In this paper, we propose, design, and evaluate a new hybrid terrestrial–underwater optical communication link for providing high-speed connectivity between land underwater systems. A device based on an amplify-and-forward strategy is considered used the link. performance analysis of proposed system then carried out, taking into account both atmospheric channels their respective degradation sources. Different networking scenarios conditions are evaluated. To end, channel model terrestrial...
In this paper, new analytical formalisms to evaluate the packet throughput of multiservice multirate slotted ALOHA optical code-division multiple-access (OCDMA) networks are proposed. The proposed can be successfully applied 1-D and 2-D OCDMA with any number user classes in system. bit error rate (BER) correct probability expressions derived, considering interference as binomially distributed. Packet expressions, on other hand, derived Poisson, binomial, Markov chain approaches for composite...
In this letter, we propose a new approach to evaluate the bit error rate (BER) of multirate, multiclass optical fast frequency hopping code-division multiple-access (OFFH-CDMA) system. This proposed does not require knowledge generated users' code sequences, which makes system analysis straightforward. Furthermore, presented formalism can also be successfully applied most multi-weight multi-length family codes, as long corresponding parameters are employed.
The increasing demands for high capacity and ultra-low latency services require to introduce a 5G mobile communications infrastructure based on centralized radio access network with space division multiplexed optical fronthaul using radio-over-fiber.The transmission of carrier aggregated OFDM signals over an analog radioover-fiber link is experimentally demonstrated.Multi-Gbit/s data rates are achieved in limited bandwidth, BER below the 25 % overhead FEC limit after millimeter-wave wireless 2.2 m.
This paper introduces a new application of fuzzy logic control (FLC) for the improvement traffic performance over optical code-division multiple-access (OCDMA) networks. focuses on mitigation environmental temperature variation effects that occur in transmission links impact expected magnitude autocorrelation peak users' code. The FLC system, whose input variables are propagation distances and estimated changes, is installed network receivers. system sets threshold detection level according...
Abstract Physical curiosity at the beginning, optical chaos is now attracting increasing interest in various technological areas such as detection and ranging or secure communications, to name but a few. However, complexity of generators still significantly hinders their development. In this context, generation chaotic polarization fluctuations single laser diode has proven be significant step forward, despite being observed solely for quantum-dot vertical-cavity surface-emitting lasers...
The most radical evolution in recent mobile communication technology is imminent the coming years. fronthaul network architecture part of this and expected to support dense deployment infrastructure provide increased bandwidth ultra-low latency for 5th generation (5G) networks a cost-effective manner. new called cloud radio access (C-RAN) has been introduced over last years increase scalability, manageability, flexibility systems. In context, paper addresses principal enablers C-RAN 5G...
In this paper, the performance of single and multirate fast frequency hopping optical code-division multiple-access (FFH-OCDMA) networks based on coherent modulation formats is addressed. The following are assumed: binary quadrature phase shift keying (BPSK QPSK). For rate networks, BPSK QPSK used as for all users. On other hand, employed low- high-rate transmission users, respectively. both new bit error (BER) formalisms regarding main deleterious source in OCDMA derived, namely...
The fifth generation (5G) mobile systems can be considered the way to ubiquitous Internet, pervasive computing paradigm, and a revolution in industries like automotive, media entertainment, eHealth. New 5G fronthaul based on centralized radio access networks will eventually use technology enablers such as reconfigurable optical add-drop multiplexers, space-division multiplexing, ribbon fibers, software-defined networking, multiple-input multiple-output signaling, analog radio-over-fiber...
We propose a BER expression based on binomial distribution for multirate OCDMA system. compare it with Poisson assumption MAI and show the later underestimates number of users given BER.
In this paper we investigate the application of free space optical (FSO) communications, energy harvesting, and unmanned aerial vehicles (UAVs) as key technology enablers a cost-efficient backhaul/fronthaul framework for 5G beyond (5G+) networks. This novel approach is motivated by several facts. First, UAVs, acting relay nodes, represent an easy-to-deploy adaptive network that can provide line-of-sight between base stations gateways connected to core network. Second, FSO communications...
In this paper, we provide a performance comparison and analysis between hybrid 1-D WDM/OCDMA system 2-D WHTS OCDMA system. the system, OOC is employed as users code sequence of dimension. The simulation results show that presents better than also under standard BER scenario, i.e., = 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-9</sup> , can support at least 75% more simultaneous for analyzed case study. suggests qualified migration...
The key-performance indicators (KPIs) that will be delivered by 5G networks such as extremely low-latency, high capacity, robustness and highly flexible network are key enablers for applications autonomous driving, cooperative robotics, transport processing of large volumes video images, to name but a few. This paper presents the ongoing build up deployment Eindhoven based 5G-Brainport testbed towards an open environment validation test end-to-end benefitting from KPIs.
Currently, link recommendation has gained more attention as networked data becomes abundant in several scenarios. However, existing methods for this task have failed considering solely the structure of dynamic networks improved performance and accuracy. Hence, work, we present a methodology based on use multiple topological metrics order to achieve prospective recommendations time constraints. The combination such is used input binary classification algorithms that state whether two pairs...
The fifth-generation (5G) of mobile communications is expected to enable emerging use cases like autonomous driving vehicles, cooperative robotics, and innovative healthcare systems. These applications primarily will be available in ultra-dense urban areas, where optical fiber infrastructure already deployed become part the 5G ecosystem. further integration along with wireless technology visible light (VLC) can both never thought before satisfy challenging key performance indicators such as...
With the digitalization of industry and society, data centers have grown into an essential key strategic infrastructure, centralizing processing, storage distribution vast amounts information. Through continuing centralization, their size grows ever larger, while at same time they need to remain flexible dynamic adapt temporary nature diverse requirements many tasks. Modular can fulfil this requirement, allowing quick deployment provisioning, being highly reconfigurable - however, in such...
In this paper, we propose a new formalism for traffic transmission over optical code-division multiple-access (OCDMA) network architectures capable of mitigating environmental temperature variation effects in the link. Those do play an important role overall performance network. To carry out analysis, use unequal priority substreams with reliability where data is organized into blocks, and adjustable weight codes are configured by fuzzy system control at encoder. The proposed intelligent can...
6G networks are expected to use the terahertz (THz) frequency spectrum in some way.However, relatively little is known about transmission channel this part of spectrum.In paper, we propose a novel and accurate loss model that considers both molecular water vapor continuum absorptions for THz based on range between 100 GHz 600 GHz.The proposed assumes atmospheric absorption accurately accounted by coefficient coefficient.The new equations developed match response given spectroscopic...
In this paper, we propose a new Internet protocol (IP) traffic transmission architecture over optical code-division multiple-access (OCDMA) network capable of providing multiservice, multirate transmissions. The is independent the OCDMA scheme employed. main idea to use multi-weight multi-length orthogonal code (MWML-OOC) as signature sequence an incoherent system achieve multiservice and Furthermore, in order evaluate packet error rate (PER) proposed IP transmission, derive bit (BER)...