70 documents found, page 1 of 7
System-level assessment of massive multiple-input–multiple-output and reconfigu...
Pavia, J. P.; Velez, V.; Souto, N.; Silva, M. M. Da; Correia, A.In this article, we investigate in different scenarios the feasibility of using massive multiple-input–multiple-output (mMIMO) with reconfigurable intelligent surfaces (RISs) to increase the throughput and coverage with high energy efficiency, considering sub-6 GHz, mmWave, and THz bands. With that objective, a centralized radio access network (C-RAN) suitable for beyond fifth-generation (B5G) systems is consid...
Performance assessment of a RIS-empowered post-5G/6G network operating at the m...
Velez, V.; Pavia, J. P.; Souto, N.; Sebastião, P.; Correia, A.Reconfigurable Intelligent Surfaces (RISs) are considered to be a key enabling technology for 6G as they can potentially provide a boost in performance with a high energy efficiency. RISs rely on the use of arrays with a large number of low-cost quasi-passive reflecting elements which can be individually tuned in order to shape the radio wave propagation. This can effectively enable the implementation of smart ...
Parentalidade em neonatologia : intervenção educativa digital promotora da lite...
Souto, N.A Literacia em Saúde (LS) constitui uma prioridade, um desafio e um elemento determinante para a concretização da centralidade da pessoa nos cuidados de saúde. Quando aplicada à Unidade de Neonatologia (UN), esta abordagem de cuidados centraliza-se na família e assume-se como uma referência no apoio à parentalidade, que constitui um foco para intervenções de Enfermagem. O internamento na UN poderá afetar a LS d...
Joint active and passive beamforming for RIS-aided MIMO communications with low...
Souto, N.Practical hardware limitations often impose a reduced number of available phase shifts at the elements of a reconfigurable intelligent surface (RIS). Most works often assume continuous phase-shits at the RIS elements for the transmit and passive beamforming optimization, which can lead to substantial performance loss. Therefore, to harvest the gains of RIS-assisted multi-stream multiple-input multiple-output (M...
Joint beamforming algorithm for multi-stream MIMO systems assisted by multiple ...
Souto, N.; Silva, J.In recent years there has been a growing interest in reconfigurable intelligent surfaces (RISs) as enablers for the realization of smart radio propagation environments which can provide performance improvements with low energy consumption in future wireless networks. However, to reap the potential gains of RIS it is crucial to jointly design both the transmit precoder and the phases of the RIS elements. Within ...
A software defined radio based anti-UAV mobile system with jamming and spoofing...
Branco Ferreira, R.; Gaspar, J.; Sebastião, P.; Souto, N.The number of incidents between unmanned aerial vehicles (UAVs) and aircrafts at airports and airfields has been increasing over the last years. To address the problem, in this paper we describe a portable system capable of protecting areas against unauthorized UAVs, which is based on the use of low-cost SDR (software defined radio) platforms. The proposed anti-UAV system supports target localization and integr...
Low-complexity channel codes for reliable molecular communication via diffusion
Sofia Figueiredo; Souto, N.; Cercas, F.It is envisioned that healthcare systems of the future will be revolutionized with the development and integration of body-centric networks into future generations of communication systems, giving rise to the so-called “Internet of Bio-nano things”. Molecular communications (MC) emerge as the most promising way of transmitting information for in-body communications. One of the biggest challenges is how to minim...
Low-complexity channel codes for reliable molecular communication via diffusion
Sofia Figueiredo; Souto, N.; Cercas, F.It is envisioned that healthcare systems of the future will be revolutionized with the development and integration of body-centric networks into future generations of communication systems, giving rise to the so-called “Internet of Bio-nano things”. Molecular communications (MC) emerge as the most promising way of transmitting information for in-body communications. One of the biggest challenges is how to minim...
System-level assessment of low complexity hybrid precoding designs for massive ...
Pavia, J. P.; Velez, V.; Souto, N.; Ribeiro, M.; Sebastião, P.; Correia, A.The fast growth experienced by the telecommunications field during the last few decades has been motivating the academy and the industry to invest in the design, testing and deployment of new evolutions of wireless communication systems. Terahertz (THz) communication represents one of the possible technologies to explore in order to achieve the desired achievable rates above 100 Gbps and the extremely low laten...
Low-complexity channel codes for reliable molecular communication via diffusion
Figueiredo, S.; Souto, N.; Cercas, F.It is envisioned that healthcare systems of the future will be revolutionized with the development and integration of body-centric networks into future generations of communication systems, giving rise to the so-called “Internet of Bio-nano things”. Molecular communications (MC) emerge as the most promising way of transmitting information for in-body communications. One of the biggest challenges is how to minim...