Walter C. Freitas - Publications, H-index & Citations

Walter C. Freitas

universidade federal do ceara

15H指数

121论文数

582被引数

收录论文 17

发表时间

Efficient Battery Usage in Wireless-Powered Cell-Free Systems With Self-Energy Recycling

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY

IF7.1

2023-05-01

OAAI

Braga Jr, Iran M. M.; Antonioli, Roberto P. P.; Fodor, Gabor; Silva, Yuri C. B.; Freitas Jr, Walter C. C.

Decentralized Joint Pilot and Data Power Control Based on Deep Reinforcement Learning for the Uplink of Cell-Free Systems

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY

IF7.1

2023-01-01

PREAI

Braga Jr, Iran Mesquita; Antonioli, Roberto Pinto; Fodor, Gabor; Silva, Yuri C. B.; Freitas Jr, Walter C. C.

On the Energy Efficiency of Cell-Free Systems With Limited Fronthauls: Is Coherent Transmission Always the Best Alternative?

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS

IF10.7

2022-10-01

PREAI

Antonioli, Roberto Pinto; Braga, Iran Mesquita; Fodor, Gabor; Silva, Yuri C. B.; de Almeida, Andre L. F.; Freitas, Walter C.

A Network-Assisted Game-Theoretic Design to Power Control in Autoregressive Fading Channels

IEEE COMMUNICATIONS LETTERS

IF4.4

2022-07-01

PREAI

Saraiva, Juno, V; Antonioli, Roberto P.; Fodor, Gabor; Braga, Iran M.; Freitas, Walter C.; Silva, Yuri C. B.

Joint Pilot and Data Power Control Optimization in the Uplink of User-Centric Cell-Free Systems

IEEE COMMUNICATIONS LETTERS

IF4.4

2022-02-01

PREAI

Braga Jr, Iran M.; Antonioli, Roberto P.; Fodor, Gabor; Silva, Yuri C. B.; Freitas Jr, Walter C.

Joint Resource Allocation and Transceiver Design for Sum-Rate Maximization Under Latency Constraints in Multicell MU-MIMO Systems

IEEE TRANSACTIONS ON COMMUNICATIONS

IF8.3

2021-07-01

OAAI

Braga Jr, Iran Mesquita; Antonio, Roberto Pinto; Fodo, Gabor; Silva, C. B.; Silva, Carlos F. M. E.; Freitas Jr, Alter C.

Enhanced Tensor-Based Joint Channel and Symbol Estimation in Dual-Hop MIMO Relaying Systems

IEEE COMMUNICATIONS LETTERS

IF4.4

2021-05-01

PREAI

Han, Xi; Zhao, Xinyuan; de Almeida, Andre L. F.; Freitas, Walter da C.; Bai, Wenle

Energy Efficiency Maximization Under Minimum Rate Constraints in Multi-Cell MIMO Systems With Finite Buffers

IEEE TRANSACTIONS ON GREEN COMMUNICATIONS AND NETWORKING

IF6.7

2021-03-01

PREAI

Saraiva, Juno Vitorino; Antonioli, Roberto Pinto; Fodor, Gabor; Braga Jr, Iran Mesquita; Freitas Jr, Walter C.; Silva, Yuri C. B.; Silva, Carlos F. M. e

User Scheduling Based on Multi-Agent Deep Q-Learning for Robust Beamforming in Multicell MISO Systems

IEEE COMMUNICATIONS LETTERS

IF4.4

2020-12-01

PREAI

Braga Jr, Iran M.; Cavalcante, Eduardo de O.; Fodor, Gabor; Silva, Yuri C. B.; e Silva, Carlos F. M.; Freitas Jr, Walter C.

Hybrid Analog-Digital Beamforming Design for SE and EE Maximization in Massive MIMO Networks

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY

IF7.1

2020-01-01

PREAI

Ardah, Khaled; Fodor, Gabor; Silva, Yuri C. B.; Freitas Jr, Walter C.; de Almeida, Andre L. F.

Bidirectional Sum-Power Minimization Beamforming in Dynamic TDD MIMO Networks

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY

IF7.1

2019-10-01

PREAI

Cavalcante, Eduardo de Olivindo; Fodor, Gabor; Silva, Yuri C. B.; Freitas, Walter C., Jr.

A Unifying Design of Hybrid Beamforming Architectures Employing Phase Shifters or Switches

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY

IF7.1

2018-11-01

PREAI

Ardah, Khaled; Fodor, Gabor; Silva, Yuri C. B.; Freitas, Walter C., Jr.; Cavalcanti, Francisco R. P.

Generalized Khatri-Rao and Kronecker space-time coding for MIMO relay systems with closed-form semi-blind receivers 具有闭合形式半盲接收机的MIMO中继系统的广义khatri-rao和Kronecker空时编码

SIGNAL PROCESSING

IF3.6

2018-10-01

OAAI

Freitas Jr, Walter; Favier, Gerard; de Almeida, Andre L. F.

Pricing-Based Distributed Beamforming for Dynamic Time Division Duplexing Systems

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY

IF7.1

2018-04-01

PREAI

Guimaraes, Francisco R. V.; Fodor, Gabor; Freitas, Walter C., Jr.; Silva, Yuri C. B.

Sequential Closed-Form Semiblind Receiver for Space-Time Coded Multihop Relaying Systems

ieee signal processing magazine

IF3.9

2017-12-01

OAAI

Freitas, Walter da C., Jr.; Favier, Gerard; de Almeida, Andre L. F.

Improved Spectral Efficiency With Acceptable Service Provision in Multiuser MIMO Scenarios

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY

IF7.1

2014-07-01

PREAI

Marques Lima, Francisco Rafael; Maciel, Tarcisio Ferreira; Freitas, Walter Cruz, Jr.; Porto Cavalcanti, Francisco Rodrigo

Resource Assignment for Rate Maximization With QoS Guarantees in Multiservice Wireless Systems

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY

IF7.1

2012-03-01

PREAI

Marques Lima, Francisco Rafael; Maciel, Tarcisio Ferreira; Freitas, Walter Cruz, Jr.; Porto Cavalcanti, Francisco Rodrigo

研究方向