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Complexity Reduction of Convolutional and Turbo Decoding Based on Reliability Thresholds
ArticleAbstract: In this paper we propose a method that aims at reducing the complexity of convolutional and turbo dePalabras claves:Complexity reduction, convolutional codes, Turbo codesAutores:Celso de Almeida, Mataveli L.O.Fuentes:scopusBER Evaluation of Linear Detectors in Massive MIMO Systems under Imperfect Channel Estimation Effects
ArticleAbstract: New perspectives for wireless communications have brought new techniques, such as a very large numbePalabras claves:BER, imperfect channel estimation, massive MIMO, Maximal-Ratio Combining, minimum-mean-square error, Zero-ForcingAutores:Carlos Daniel Altamirano Carrillo, Celso de Almeida, Henry Ramiro Carvajal Mora, Minango J.Fuentes:scopusA Low-Complexity Linear Precoding Algorithm Based on Jacobi Method for Massive MIMO Systems
Conference ObjectAbstract: In massive multiple-input multiple-output (MIMO) systems with the increase of the number of receivedPalabras claves:BER, channel capacity, Jacobi method, massive MIMO, Matrix inversion, Zero-ForcingAutores:Celso de Almeida, Minango J.Fuentes:scopusA hybrid transmission scheme employing opportunistic transmission and multiuser diversity
Conference ObjectAbstract: In this paper, we present a novel transmission scheme, which consists of a hybrid transmission methoPalabras claves:BER, Hybrid transmission, Multiuser diversity, opportunistic transmission, Spectral efficiencyAutores:Celso de Almeida, Henry Ramiro Carvajal Mora, Nathaly OrozcoFuentes:scopusConstruction of signal sets matched to Abelian and Non-Abelian groups
Conference ObjectAbstract: We present an algorithm for the construction of signal sets matched to abelian and non-abelian groupPalabras claves:Autores:Celso de Almeida, Interlando J.C., Palazzo R.Fuentes:scopusData transmission efficiency over CDMA systems employing RLP and FEC error control strategies on the radio link layer
ArticleAbstract: In this article, the normalized throughput and the normalized average delay for the transport layerPalabras claves:Autores:Celso de Almeida, Filho R.B., NELSON BOLIVAR BENAVIDES CIFUENTESFuentes:googlescopusCDMA ad hoc networks in multipath fading channels
Conference ObjectAbstract: This work analyses the effects of multipath diversity on the performance of wireless code division mPalabras claves:Autores:Celso de Almeida, Filho R.B., Ramos R.P., Rêgo M.G.Fuentes:scopusAchieving optimum performance with ZF detector by using a novel precoding approach in spatial multiplexing MIMO systems
ArticleAbstract: Zero forcing (ZF) detector is unable to exploit all of the available diversity order of a spatial muPalabras claves:BER, Condition number, Maximum likelihood, Optimum performance, Spatial multiplexing MIMO systems, Zero-ForcingAutores:Celso de Almeida, Minango J.Fuentes:scopusAn Opportunistic System to Counteract Fading and Gaussian Interference Effects under Different Modulation Schemes
ArticleAbstract: In this paper we propose an opportunistic transmission in which the fading characteristics and interPalabras claves:Cellular system, co-channel interference, Opportunistic System, Rayleigh Fading ChannelAutores:Celso de Almeida, Henry Ramiro Carvajal Mora, Nathaly OrozcoFuentes:scopusFading effects on the CDMA/PRMA network performance
ArticleAbstract: A system level network simulator is developed to assess and to compare some performance aspects of aPalabras claves:Autores:Celso de Almeida, Hoefel R.Fuentes:scopus