A5066702697- Advanced MIMO Systems Optimization
- Cognitive Radio Networks and Spectrum Sensing
- Wireless Communication Networks Research
- Satellite Communication Systems
- Power Line Communications and Noise
- Advanced Wireless Communication Techniques
- Software-Defined Networks and 5G
- Millimeter-Wave Propagation and Modeling
- Advanced Wireless Communication Technologies
- Radio Frequency Integrated Circuit Design
- History and Developments in Astronomy
- Cooperative Communication and Network Coding
- Railway Systems and Energy Efficiency
- Advancements in PLL and VCO Technologies
- Interconnection Networks and Systems
- CCD and CMOS Imaging Sensors
- PAPR reduction in OFDM
- Advanced Memory and Neural Computing
- Advanced Adaptive Filtering Techniques
- Telecommunications and Broadcasting Technologies
- Wireless Networks and Protocols
- Analog and Mixed-Signal Circuit Design
University of South Wales
2022-2024
Instituto de Telecomunicações
2002-2022
Altice Portugal (Portugal)
2015
University of Aveiro
2002-2014
Universidad de Sevilla
2007
In recent years, there have been significant developments in the research on 5th Generation (5G) networks. Several enabling technologies are being explored for 5G mobile system era. The aim is to evolve a cellular network that intrinsically flexible and remarkably pushes forward limits of legacy systems across all dimensions performance metrics. All stakeholders, such as regulatory bodies, standardization authorities, industrial fora, operators vendors, must work unison bring fruition. this...
Spectrum sharing has been recognized as a key component for 5G and beyond wireless networks. Recent trials have revealed the business value of spectrum via licensed shared access model, wherein both incumbent licensee operators are protected from harmful interference by available using long-term agreements. Further increase in capacity gains can be achieved exploiting dynamic access, where is granted shorter time intervals, Access System, which more flexible version traditional LSA. This...
This paper proposes a new system architecture for Licensed Shared Access (LSA) wireless networks, as well novel band management techniques fair and ranking-based spectrum allocation. The proposed builds upon recently standardized regulatory-accepted LSA systems stems from the work done in EU-funded project ADEL. Two resource allocation algorithms are introduced their behaviour is validated via system-level simulations.
Network virtualization allows the coexistence of multiple network slices over a shared physical infrastructure, each delivering service with own requirements in terms quality service, coverage, and time span. Spectrum is an expensive commodity, so it must be managed among these most efficient way. However, current spectrum sharing techniques are too rigid to address all combinations properly exploit new air interface flexibility deployment options introduced by Fifth Generation (5G) mobile...
The ever increasing demand for data traffic future wireless systems poses challenging requirements 5G communications, such as high spectral efficiency, better interference management, and extensive connectivity. These challenges open the possibility to use NOMA schemes in radio access networks. In these schemes, users are multiplexed power domain transmitter de-multiplexed using successive cancellation receiver. this work, we propose a hybrid resource allocation technique that consists of...
Exploiting additional radio spectrum is key to respond the unprecedented capacity demands of mobile broadband communication systems in recent years. In fact, most frequency bands suitable for communications are already use by other services, and refarming usually not possible or constitutes a highly time-consuming procedure. At same time, several field measurement campaigns have shown that occupied below 6GHz severely underutilized, i.e. there exist "spectrum holes" frequency, space...
Next-generation cellular networks will play a key role in the evolution of different vertical industries. Low latency be major requirement many related uses cases. This is specially challenging scenarios with high mobility end devices, such as vehicular communications. The Multi-Access Edge Computing (MEC) paradigm seeks to satisfy it. In this article we propose dynamic deployment anchor point network functions at edge locations and assignment terminals these points joint objective...
Satellite/terrestrial integration in the context of 5G is a very promising aspect, as it combines unrivaled performance with unprecedented benefits satellite communications, such ubiquitous broadband coverage and inherent multicast capabilities. This paper presents design implementation an end-to-end experimental testbed for integrated satellite/terrestrial services, developed frame EU 5GENESIS project. The encompasses all components network suitable wide-area field trials over several use...
Cognitive Radio Communications and the switch off of analog TV in Europe is creating a strong viable solution for testing new approaches to implementation Radios an effective way. In this paper concept White Spaces specially that are thought be developed will studied analyzed. It expected work basis more focus on white space communication protocols.
This paper reports a 130-nm CMOS programmable cascade ΣΔ modulator for multistandard wireless terminals, covering three standards: GSM, Bluetooth and UMTS. The is reconfigured at both architecture- circuit-level in order to adapt its performance the different standard specifications with optimized power consumption. design of building blocks based upon top-down CAD methodology that combines simulation statistical optimization levels system hierarchy. Transistor-level simulations show correct...
Fifth Generation (5G) mobile networks considers an expansive set of heterogeneous services with stringent Quality Service (QoS) requirements, and traffic demand inherent spatial-temporal distribution, which places the backhaul network deployment under potential strain. In this paper, we propose to harness slicing, Integrated Access Backhaul (IAB) technology coupled satellite connectivity build a dynamic wireless that can provide additional capacity base stations on when wired link is...
The great diversity of services expected to be delivered by third generation mobile radio systems will impose severe operating conditions on the terminal in terms computational requirements and power consumption. Therefore, we propose move most demanding signal processing tasks, usually performed unit, base station. This technique is developed for a UMTS-TDD downlink scenario through an equalizer synthesis method based redundancy between non-overlapping bands direct sequence spread spectrum...
Integrated Access and Backhaul (IAB) has been recently proposed by 3GPP to enable network operators deploy fifth generation (5G) mobile networks with reduced costs. In this paper, we propose use IAB build a dynamic wireless backhaul capable provide additional capacity those Base Stations (BS) experiencing congestion momentarily. As the traffic demand varies across time space, number of slice combinations deployed in BS can be prohibitively high, Deep Reinforcement Learning (DRL) select, from...
This paper proposes a technique aiming to simplify the mobile terminals by transferring as much possible complex operations base station. A pre-equalization is proposed for downlink channel of UMTS TDD, which allows use simpler receiver schemes in unit. After mathematical background, simulation results obtained typical scenarios, using statistical models, are presented demonstrate performance method. Several levels correlation between propagation channels that can be considered exist...
This paper deals with space-time pre-equalization for UMTS-TDD systems. The motivation of this proposal lies in the fact that TDD up and downlink channels can be highly correlated. If is case, equalization functions moved to base-station (BS), therefore simplifying mobile unit receiver design, where computational requirements power consumption issues impose severe restrictions. A design technique, which explores both frequency redundancy DS-SS signals spatial diversity achieved through use...