Zobrazeno 1 - 10
of 412
pro vyhledávání: '"Taufik Abrão"'
Publikováno v:
Journal of Sensor and Actuator Networks, Vol 13, Iss 3, p 30 (2024)
The expected huge number of connected devices in Internet of Things (IoT) applications characterizes the massive machine-type communication (mMTC) scenario, one prominent use case of beyond fifth-generation (B5G) systems. To meet mMTC connectivity re
Externí odkaz:
https://doaj.org/article/62e3d99ec28a4a9280a5efddb5bd7adc
Autor:
Felipe Augusto Dutra Bueno, Cézar Fumio Yamamura, Paulo Rogério Scalassara, Taufik Abrão, José Carlos Marinello
Publikováno v:
Sensors, Vol 23, Iss 24, p 9805 (2023)
Fifth-generation (5G) and beyond networks are expected to serve large numbers of user equipments (UEs). Grant-based random access (RA) protocols are efficient when serving human users, typically with large data volumes to transmit. The strongest user
Externí odkaz:
https://doaj.org/article/95516f83b07d43f8aca236a2a48b1f51
Autor:
Alex M. Mussi, Taufik Abrão
Publikováno v:
EURASIP Journal on Advances in Signal Processing, Vol 2021, Iss 1, Pp 1-22 (2021)
Abstract A neighborhood-restricted mixed Gibbs sampling (MGS)-based approach is proposed for low-complexity high-order modulation large-scale multiple-input multiple-output (LS-MIMO) detection. The proposed LS-MIMO detector applies a neighborhood lim
Externí odkaz:
https://doaj.org/article/a39be94bd73b4b6da57edd05351350b7
Publikováno v:
Semina: Ciências Exatas e Tecnológicas, Vol 43, Iss 1 (2022)
This work deals with power and spectrum allocation approaches for massive MIMO (M-MIMO) systems. An analysis is made to verify the efficiency of the solutions provided by schemes used for the spectral and energy efficiency (SE-EE) trade-off problem i
Externí odkaz:
https://doaj.org/article/0d3edb4067aa42bda7c2350dc43b2d0b
Publikováno v:
Semina: Ciências Exatas e Tecnológicas, Vol 39, Iss 2, Pp 107-114 (2018)
A demanda por maiores taxas de dados pode ser satisfeita pela melhoria da eficiência espectral fornecida pelos sistemas multiple-input multiple-output de larga escala. No entanto, a contaminação piloto continua a ser um problema fundamental para o
Externí odkaz:
https://doaj.org/article/34d32da5221046a4b7d55ce6fcb876ed
Publikováno v:
ETRI Journal, Vol 40, Iss 5, Pp 570-581 (2018)
This work analyzes the performance of implementable detectors for the multiple‐input multiple‐output (MIMO) orthogonal frequency division multiplexing (OFDM) technique under specific and realistic operation system conditions, including antenna co
Externí odkaz:
https://doaj.org/article/173a1e79e36641e0989dff616fb3cf1f
Publikováno v:
Semina: Ciências Exatas e Tecnológicas, Vol 37, Iss 1, Pp 55-80 (2016)
In this work key concepts on coding division multiple access (CDMA) communication systems have been discussed. The sequence selection impact on the performance and capacity of direct sequence CDMA (DS/CDMA) systems under AWGN and increasing system lo
Externí odkaz:
https://doaj.org/article/201f6bc84834434c8fb4ace854d47c03
Publikováno v:
Semina: Ciências Exatas e Tecnológicas, Vol 37, Iss 1, Pp 23-34 (2016)
Este trabalho analisa pela primeira vez o sincronismo e o controle caótico aplicados ao circuito eletrônico da partícula em mesa vibratória. Esta análise foi realizada a partir da implementação da técnica de sincronismo por realimentação de
Externí odkaz:
https://doaj.org/article/6fe7e723ec4f48efbc3339caba7d45f1
Publikováno v:
Semina: Ciências Exatas e Tecnológicas, Vol 37, Iss 1, Pp 3-12 (2016)
This contribution analyses the performance of multiple-input-multiple-output (MIMO) detectors under correlated channels. Two MIMO detection principles, namely minimum mean squared error (MMSE) detector – with and without ordered successive interfer
Externí odkaz:
https://doaj.org/article/8062953aff9a434581e247ab59b17367
Publikováno v:
Semina: Ciências Exatas e Tecnológicas, Vol 36, Iss 2, Pp 47-62 (2015)
This paper analyzes the method of power allocation for wireless communication networks, limited by multiple access interference under fading Rayleigh channels. The method takes into account the statistical variation of the desired and interfering sig
Externí odkaz:
https://doaj.org/article/4510a9be6cd147ecb53da5bcc148007b