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A Scheduling Scheme for Improving the Performance and Security of MU-MIMO Systems
ArticleAbstract: For the receiver of multiple-input multiple-output (MIMO) systems, linear detectors are an interestiPalabras claves:imperfect channel estimation, MU-MIMO, Rician fading, scheduling, Zero-ForcingAutores:Almeida F., Edgar Rosero, Henry Ramiro Carvajal Mora, Nathaly Orozco, Paola Salazar, Stalin CacuangoFuentes: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: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:scopusBER analysis of overloaded MC-CDMA cellular system employing sphere decoder in non-ideal sectorization scenario
Conference ObjectAbstract: New multiple access techniques aim to increase the spectral efficiency by overloading the system, i.Palabras claves:BER, Interference, MC-CDMA, Non-ideal-sectorization, Sphere-decoderAutores:Celso de Almeida, Henry Ramiro Carvajal Mora, Nathaly OrozcoFuentes:scopusBit error rate evaluation of SCMA in rician fading channels considering presence of co-cell interference
Conference ObjectAbstract: Non-orthogonal multiple access (NOMA) techniques have been proposed for fifth generation (5G) mobilePalabras claves:BER, Cellular system, Rician fading, SCMAAutores:Dennis Lara Hernandez, Efren Ona Proano, Frison C.I., Henry Ramiro Carvajal Mora, Nathaly OrozcoFuentes: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:scopusImproved Exact Evaluation of Equal-Gain Diversity Receivers in Rayleigh Fading Channels
ArticleAbstract: In this paper, we evaluate the performance of equal-gain-combining (EGC) receivers operating in RaylPalabras claves:average symbol error rate, equal-gain-combining, outage-probability, Rayleigh-fadingAutores:García F.D.A., Henry Ramiro Carvajal Mora, Nathaly OrozcoFuentes:scopusEnabling Signal Space Diversity for MU-MIMO/OFDMA Cellular Systems That Employ Frequency Diversity
ArticleAbstract: Signal space diversity (SSD) is a technique to obtain diversity without loss in spectral efficiency.Palabras claves:Diversity methods, MIMO, Mobile Communication, multiple access interference, OFDMAutores:Celso de Almeida, Henry Ramiro Carvajal Mora, Nathaly Orozco, Paulo Chiliguano T.Fuentes:scopusMC-CDMA and SCMA Performance Evaluation in 100% and 200% Load Factor Scenarios
Conference ObjectAbstract: In fifth-generation (5G) wireless networks, the perspective of very large number of simultaneous conPalabras claves:Autores:Celso de Almeida, Frison C.I., Henry Ramiro Carvajal MoraFuentes:googlescopusMC-CDMA and SCMA Performance and Complexity Comparison in Overloaded Scenarios
Conference ObjectAbstract: In 5G wireless networks, the perspective of very large number of simultaneous connections is challenPalabras claves:5G, MC-CDMA, Message Passing Algorithm, Overload Scenarios, SCMA, Sphere DecoderAutores:Celso de Almeida, Frison C.I., Henry Ramiro Carvajal MoraFuentes:scopus