Search Results - "Queiroz, Wamberto J. L."

On the Adaptive Modulation for User-Centric Cell-Free Massive MIMO Systems by Almeida, Danilo B. T., Alencar, Marcelo S., Duarte, Rafael M., Silva, Hugerles S., Madeiro, Francisco, Lopes, Waslon T. A., Queiroz, Wamberto J. L.

“…The cell-free (CF) systems are a key technology for future wireless networks, which exploit the scenario spatial macro-diversity to offer high channel capacity…”
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Energy and Spectral Efficiencies of Cell-Free Millimeter-Wave Massive MIMO Systems Under Rain Attenuation Based on Ray Tracing Simulations by Da Silva, Higo Thaian P., Silva, Hugerles S., Alencar, Marcelo S., De Queiroz, Wamberto J. L., Dias, Ugo Silva

“…Future wireless communication systems depend on the network's ultra-densification, on the application of massive multiple-input multiple-output (mMIMO)…”
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Evaluation of Cell-Free Millimeter-Wave Massive MIMO Systems Based on Site-Specific Ray Tracing Simulations by Higo Thaian da Silva, P., Duarte, Rafael M., Silva, Hugerles S., Alencar, Marcelo S., De Queiroz, Wamberto J. L.

“…Ultra densification of the number of antennas combined with the use of large bandwidths in the millimeter wave (mmWave) spectrum is considered one of the main…”
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Cascaded Double Beaulieu-Xie Fading Channels by Silva, Hugerles S., Almeida, Danilo B. T., Queiroz, Wamberto J. L., Fonseca, Iguatemi E., Oliveira, Arnaldo S. R., Madeiro, Francisco

“…In this letter, a mathematical characterization for the cascaded double Beaulieu-Xie (BX) fading model is presented. Exact and new expressions are determined…”
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Performance of the modulation diversity technique for κ-μ fading channels by Lopes, Rafael F, L Queiroz, Wamberto J, A Lopes, Waslon T, Alencar, Marcelo S

“…The performance of wireless communication systems can be significantly improved using the modulation diversity technique, which is based on the combination of…”
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On the Sum of α-F and Double α-F VariatesWith Application to MRC and RIS by Silva, Hugerles S., Lourenco, Guilherme B. L. C., Queiroz, Wamberto J. L., Oliveira, Arnaldo S. R., Madeiro, Francisco, Badarneh, Osamah S., Dias, Ugo S., de Souza, Rausley A. A.

“…In this letter, a statistical framework is presented for the sum of <inline-formula> <tex-math notation="LaTeX">\alpha…”
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On the BEP and Outage Probability Under Cascaded Double Correlated \eta- \mu Fading Channels by Queiroz, Wamberto J. L. de, Silva, Hugerles S., Silva, Higo T. P. da, Almeida, Danilo B. T., Oliveira, Arnaldo S. R., Madeiro, Francisco

“…In this article, a new expression for the joint moment generating function (MGF) of the signal-to-noise ratio (SNR) considering correlated…”
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Beaulieu-Xie Phase-Envelope Joint and Bivariate Distributions by Silva, Hugerles S., Almeida, Danilo B. T., Queiroz, Wamberto J. L., Silva, Higo T. P., Oliveira, Arnaldo S. R., Madeiro, Francisco

“…A new, exact and closed-form expression is presented for the Beaulieu-Xie (BX) phase-envelope joint distribution. In addition, bivariate statistics are also…”
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An Alternative Method to Compute the Bit Error Probability of Modulation Schemes Subject to Nakagami-m Fading by Queiroz, Wamberto J L, Lopes, Waslon T A, Madeiro, Francisco, Alencar, Marcelo S

“…This paper presents an alternative method for determining exact expressions for the bit error probability (BEP) of modulation schemes subject to Nakagami-m…”
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On the Statistics of the Maximum of α-F Variates and Their Applications by Silva, Hugerles S., Lourenco, Guilherme B. L. C., Queiroz, Wamberto J. L., Oliveira, Arnaldo S. R., Madeiro, Francisco, Badarneh, Osamah S.

“…In this letter, a statistical characterization is provided for the instantaneous signal-to-noise ratio (SNR) resulting from the maximum of independent and…”
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Bit error probability of the M-QAM scheme subject to multilevel (double) gated additive white Gaussian noise and Nakagami-m fading by Silva, Hugerles S., Alencar, Marcelo S., Queiroz, Wamberto J. L., Almeida, Danilo B. T., Madeiro, Francisco

“…In this paper, noise models called multilevel gated additive white Gaussian noise (GAWGN) and multilevel double gated additive white Gaussian noise ( G 2 AWGN)…”
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SEP of the M-ary θ-QAM signals under η-μ fading and AWGN noise in a communication system using spatial diversity by Silva, Hugerles S., Almeida, Danilo B. T., Queiroz, Wamberto J. L., Madeiro, Francisco, Fonseca, Iguatemi E., de Alencar, Marcelo S.

“…In this paper, an upper bound on the symbol error probability (SEP) of the M -ary θ -quadrature amplitude modulation scheme, in a channel subject to additive…”
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Bit error probability of the M‐QAM scheme under η‐μ fading and impulsive noise in a communication system using spatial diversity by Silva, Hugerles S., Alencar, Marcelo S., Queiroz, Wamberto J. L., Almeida, Danilo B. T., Madeiro, Francisco

“…Summary This paper presents a new and exact expression for the bit error probability (BEP) of the square M‐ary quadrature amplitude modulation (M‐QAM) scheme,…”
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On the performance of M-QAM for Nakagami channels subject to gated noise by Queiroz, Wamberto J. L., Madeiro, Francisco, Lopes, Waslon T. A., Alencar, Marcelo S.

“…This paper presents a mathematical analysis of the joint effects of additive white Gaussian noise and gated noise in an M -ary Quadrature Amplitude Modulation…”
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A Unified Analysis of Fox H-Fading With Beam Misalignment: Theory and Applications by Silva, Hugerles S., Queiroz, Wamberto J. L., Figueiredo, Felipe A. P., de Souza, Rausley A. A., Li, Yonghui

“…This paper presents a unified analysis of the Fox H-fading channel with beam misalignment. A statistical framework is introduced that includes new expressions…”
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New closed-form expressions for SNR estimates of Nakagami fading channels by the method of moments by Queiroz, Wamberto J. L., Almeida, Danilo B. T., Madeiro, Francisco, de M. Cardoso, José V., Pereira, Damião F. L., Alencar, Marcelo S.

“…Method of moments has been a parameter estimation technique appropriate to calculate signal-to-noise ratio (SNR) estimates in fading channel models in which an…”
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Performance analysis of generalized QAM modulation under η−μ and κ−μ fading by Queiroz, Wamberto J. L., Madeiro, Francisco, Lopes, Waslon T. A., Alencar, Marcelo S.

“…This paper presents new closed-form expressions for the symbol error probability (SEP) of θ -QAM modulation with maximum ratio combining (MRC) receiver under η…”
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Spatial Correlation for DoA Characterization Using Von Mises, Cosine, and Gaussian Distributions by Queiroz, Wamberto J. L., Madeiro, Francisco, Lopes, Waslon Terllizzie A., Alencar, Marcelo Sampaio de

“…This paper presents mathematical expressions for the spatial correlation between elements of linear and circular antenna arrays, considering cosine, Gaussian,…”
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The Extended \eta- } Composite Fading Distribution by Silva, Hugerles S., Badarneh, Osamah S., Queiroz, Wamberto J. L.

“…In this paper, the extended <inline-formula><tex-math notation="LaTeX">\eta</tex-math></inline-formula>-<inline-formula><tex-math notation="LaTeX">{\mathcal…”
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Characterization of Large-Scale Parameters in Indoor THz Channels Applying the Ray Tracing Method by da Silva, Higo Thaian P., Silva, Hugerles S., Alencar, Marcelo S., Queiroz, Wamberto J. L., Dias, Ugo S.

“…Due to the large available bandwidth, the communications in the terahertz band (0.1 THz − 10 THz) is one of the key techniques to meet the Tbit/s rate…”
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