Zobrazeno 1 - 10
of 369
pro vyhledávání: '"Abrao, Taufik"'
Autor:
Junior, Wilson de Souza, Guerra, David William Marques, Marinello, José Carlos, Abrão, Taufik, Hossain, Ekram
Manifold optimization (MO) is a powerful mathematical framework that can be applied to optimize functions over complex geometric structures, which is particularly useful in advanced wireless communication systems, such as reconfigurable intelligent s
Externí odkaz:
http://arxiv.org/abs/2408.00553
This chapter delves into the critical aspects of optimizing energy efficiency (EE) in active reconfigurable intelligent surface (RIS)-assisted massive MIMO (M-MIMO) wireless communication systems. We develop a comprehensive and unified theoretical fr
Externí odkaz:
http://arxiv.org/abs/2402.14994
Intelligent metasurfaces are one of the favorite technologies for integrating sixth-generation (6G) networks, especially the reconfigurable intelligent surface (RIS) that has been extensively researched in various applications. In this context, a fea
Externí odkaz:
http://arxiv.org/abs/2401.03189
Autor:
Junior, Wilson de Souza, Abrao, Taufik
In this work, we address the energy efficiency (EE) maximization problem in a downlink communication system utilizing reconfigurable intelligent surface (RIS) in a multi-user massive multiple-input multiple-output (mMIMO) setup with zero-forcing (ZF)
Externí odkaz:
http://arxiv.org/abs/2312.13563
Publikováno v:
IEEE Transactions on Wireless Communications, 2014
Channel state information (CSI) estimation is a critical issue in the design of modern massive multiple-input multiple-output (mMIMO) networks. With the increasing number of users, assigning orthogonal pilots to everyone incurs a large overhead that
Externí odkaz:
http://arxiv.org/abs/2310.06975
Autor:
Santos, Herman L. dos, Vaca-Rubio, Cristian J., Kotaba, Radosław, Song, Yi, Abrão, Taufik, Popovski, Petar
This paper proposes a method for reducing {third-party} exposure to electromagnetic fields (EMF) by exploiting the capability of a reconfigurable intelligent surfaces' (RIS) to manipulate the electromagnetic environment. We consider users capable of
Externí odkaz:
http://arxiv.org/abs/2305.05229
Autor:
de Souza, João Henrique Inacio, Croisfelt, Victor, Kotaba, Radosław, Abrão, Taufik, Popovski, Petar
This letter proposes a scheme assisted by a reconfigurable intelligent surface (RIS) for efficient uplink traffic multiplexing between enhanced mobile broadband (eMBB) and ultra-reliable-low-latency communication (URLLC). The scheme determines two RI
Externí odkaz:
http://arxiv.org/abs/2305.04629
This paper deals with the reliability of random access (RA) protocols for massive wireless smart grid communication (m-SGC). We propose and analyze an improved grant-free RA (GF-RA) protocol for critical SG applications under strict QoS m-SGC require
Externí odkaz:
http://arxiv.org/abs/2305.02108
Autor:
Junior, Wilson de Souza, Abrao, Taufik
Publikováno v:
Internet Technology Letters. 2023;e404
In this work, two machine learning (ML)-based structures for joint detection-channel estimation in OFDM systems are proposed and extensively characterized. Both ML architectures, namely Deep Neural Network (DNN) and Extreme Learning Machine (ELM), ar
Externí odkaz:
http://arxiv.org/abs/2304.12189
Publikováno v:
Physical Communication, Elsevier. Available online 31 March 2023, 102062
The main requirements for 5G and beyond connectivity include a uniform high quality of service, which can be attained in crowded scenarios by extra-large MIMO (XL-MIMO) systems. Another requirement is to support increasing connected users in (over)cr
Externí odkaz:
http://arxiv.org/abs/2304.03873