Search Results - "Lopes, R.R."

The soft-feedback equalizer for turbo equalization of highly dispersive channels by Lopes, R.R., Barry, J.R.

“…The complexity of a turbo equalizer based on the Bahl-Cocke-Jelinek-Raviv (BCJR) algorithm is manageable only for mildly dispersive channels having a small…”
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A scoping review of Chikungunya virus infection: epidemiology, clinical characteristics, viral co-circulation complications, and control by Silva, José V.J., Ludwig-Begall, Louisa F., Oliveira-Filho, Edmilson F. de, Oliveira, Renato A.S., Durães-Carvalho, Ricardo, Lopes, Thaísa R.R., Silva, Daisy E.A., Gil, Laura H.V.G.

“…[Display omitted] •Chikungunya disease has been reported in all continents, except Antarctica.•The co-circulation of CHIKV with other arboviruses requires a…”
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Current status, challenges and perspectives in the development of vaccines against yellow fever, dengue, Zika and chikungunya viruses by Silva, José V.J., Lopes, Thaísa R.R., Oliveira-Filho, Edmilson F. de, Oliveira, Renato A.S., Durães-Carvalho, Ricardo, Gil, Laura H.V.G.

“…Emerging and re-emerging viral infections transmitted by insect vectors (arthopode-borne viruses, arbovirus) are a serious threat to global public health…”
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Epidemiological analysis over two years of SARS-CoV-2 circulation in southern Brazil: old and novel predictors of COVID-19 outcome by Lopes, T.R.R., Silva Júnior, J.V.J., Carmo, R.F., Weiblen, R., Flores, E.F.

“…The overwhelming majority of SARS-CoV-2 epidemiological studies cover a narrow time period, making general knowledge about the COVID-19 pandemic difficult. To…”
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Genetic algorithms for blind maximum likelihood receivers by de F Attux, R.R., Lopes, R.R., de Castro, L.N., Von Zuben, F.J., Romano, J.M.T.

“…The ultimate receiver in a communications system is one that minimizes the bit-error rate (BER) or, equivalently, that maximizes the likelihood function…”
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Exploiting Dimensions of the MIMO wireless channel: multidimensional link adaptation by Freitas, W.C., Cavalcanti, F.R.P., de Almeida, A.L.F., Lopes, R.R.

“…In this paper, we propose an adaptive radio interface scheme for systems that employ multiple antennas. This is in contrast to the adaptive interface of…”
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Design, Simulation and Hardware Implementation of a Digital Television System: LDPC channel coding by Pegoraro, T.F., Gomes, F.A.L., Lopes, R.R., Gallo, R., Panaro, J.S.G., Paiva, M.C., Oliveira, F.A., Lumertz, F.

“…In this paper, we describe a hardware implementation of a low-density parity-check (LDPC) code for the MI-SBTVD project, which aims at the development of an…”
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A state-space approach to semi-blind signal detection in fast frequency-selective fading MIMO channels by Loiola, M.B., Lopes, R.R.

“…In this paper, we propose a semi-blind state-space based receiver that jointly performs channel estimation and data detection in MIMO systems subject to fast…”
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Kalman Filter-Based Channel Tracking in MIMO-OSTBC Systems by Loiola, M.B., Lopes, R.R., Romano, J.

“…In this paper we propose low-complexity algorithms for estimating flat, time-varying and spatially correlated MIMO channels. The proposed estimators employ…”
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Hybrid MIMO Transceiver Scheme with Antenna Allocation and Partial CSI at Transmitter Side by Freitas, W.C., Cavalcanti, F.R.P., Lopes, R.R.

“…Hybrid multiple-input multiple-output (MIMO) transceiver scheme (HMTS) combines transmit diversity and spatial multiplexing, thus achieving at the same time…”
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Zero-outage strategy for multi-antenna broadcast channels with limited feedback by Fernandes, F.G., Lopes, R.R., Filho, D.Z.

“…Transmission techniques for the wireless multi-antenna broadcast channel often require that the receivers feed back their channel state information (CSI) to…”
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Turbo-Fuzzy Equalization for Single-Carrier Power Line Channels by Ribeiro, M.V., Loiola, M.B., Lopes, R.R.

“…This paper introduces a turbo-fuzzy equalizer (TFEQ) to cope with the inter-symbol interference effects and impulsive noise occurrences in bandlimited digital…”
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MIMO Transmit Structure Assignment with QoS Provision in Wireless Systems by Freitas, W.C., Cavalcanti, F.R.P., Lopes, R.R.

“…In this paper, we propose a suboptimal algorithm to assign MIMO transmit structures subject a required quality of service (QoS). In particular, we use the…”
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Soft-output decision-feedback equalization with a priori information by Lopes, R.R., Barry, J.R.

“…Soft-output equalizers that exploit a priori information on the channel inputs play a central role in turbo equalization. Such equalizers are traditionally…”
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Blind iterative channel identification and equalization by Lopes, R.R., Barry, J.R.

“…We propose an iterative solution to the problem of blindly and jointly identifying the channel response and transmitted symbols in a digital communications…”
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Exploiting error-control coding in blind channel estimation by Lopes, R.R., Barry, J.R.

“…Despite the widespread use of forward-error control (FEC) coding, most channel estimation techniques ignore its presence, and instead make the simplifying…”
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Beyond PRML: linear-complexity turbo equalization using the soft-feedback equalizer by Chesnutt, E., Lopes, R.R., Barry, J.R.

“…The combination of partial response and trellis-based maximum-likelihood sequence detection that dominates magnetic recording is known as PRML. The receiver…”
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The capacity of binders for MIMO digital subscriber lines by Zanatta Filho, D., Lopes, R.R., Ferrari, R., Loiola, M.B., Suyama, R., Simoes, G.C.C., Wada, C., Romano, J.M.T., Dortschy, B., Riu, J.R.i.

“…Crosstalk is one of the main limiting factors in the data rates achievable by digital subscriber line (DSL) systems, and several algorithms have been proposed…”
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