Luis Lolis - Academia.edu (original) (raw)

Luis Lolis

Related Authors

Judith L Green

E. Wayne Ross

Càndid Reig

David Seamon

Fatiha  Djemili Tolba

Lyla B Das

Lyla B Das

National Institute of Technology, Calicut

Roshan Chitrakar

Lev Manovich

Lev Manovich

Graduate Center of the City University of New York

Suresh Muthusamy

Journal of Computer Science IJCSIS

Uploads

Papers by Luis Lolis

Research paper thumbnail of Artificial Neural Network Based Automatic Modulation Classification System Applied to FPGA

2021 34th SBC/SBMicro/IEEE/ACM Symposium on Integrated Circuits and Systems Design (SBCCI)

Research paper thumbnail of Spectral efficiency analysis for massive MIMO orthogonal frequency division multiplexing and filter bank multicarrier in a realistic scenario using signal‐to‐noise‐and‐distortion ratio and interpolation for different modulation coding schemes

Transactions on Emerging Telecommunications Technologies

Research paper thumbnail of Semana De Atualização Em Engenharia Elétrica 2019 / Electrical Engineering Updating Week 2019

Brazilian Journal of Development

Research paper thumbnail of Spectral Efficiency of Massive MIMO using FBMC-OQAM Modulation

Anais de XXXVI Simpósio Brasileiro de Telecomunicações e Processamento de Sinais

This article covers the potential of Filter Bank Multicarrier (FBMC) modulation to be used in the... more This article covers the potential of Filter Bank Multicarrier (FBMC) modulation to be used in the future 5G wireless networks where Massive Multiple-Input Multiple-Output (MIMO) will be deployed. The study compares orthogonal frequency division multiplexing (OFDM) with FBMC. The former is the multiplexing technique in 4G communications and the latter is one of the strongest candidates to replace OFDM in 5G networks. This comparison evaluates the spectral efficiency (SE) of a massive MIMO (MM) system uplink under a singlecell environment. Due to the absence of the cyclic prefix, the FBMC has better SE than the OFDM as the signal-to-noise-ratio (SNR) increases. However, to the best of the authors' knowledge, this study has not yet been conducted under a MM scenario. In summary, this article presents an analysis of SE of FBMC considering a MM setup. While limiting the modulation to 64-Quadrature Amplitude Modulation (QAM) per sub carrier, it was observed that as the SE increases, the required number of antennas for the OFDM becomes the double or the triple of the counterpart using FBMC, or even it is not achieved by the OFDM.

Research paper thumbnail of A fully integrated CMOS power amplifier with discrete gain control for efficiency enhancement

Research paper thumbnail of A low-power 10-bit 6.66MS/s CMOS SAR ADC with built-in digital calibration dedicated to IoT applications

Journal of Integrated Circuits and Systems

In this paper, an energy-efficient SAR ADC for IoT applications is presented. The proposed ADC re... more In this paper, an energy-efficient SAR ADC for IoT applications is presented. The proposed ADC relies on a built-in calibration circuit to improve accuracy and introduces an original DAC that merges the concepts of binary-weighted and C/2C arrays in order to achieve a favorable trade-off between area, accuracy and power consumption. The system consumes 58 µW per conversion cycle sampling at a frequency of 6.66 MHz with an SNDR of 49.78 dB for a 1MHz input signal. With an ENOB of 8 bits, the resulting FOM is 34fJ/conversion-step.

Research paper thumbnail of Spectral Efficiency Analysis in Massive MIMO using FBMC-OQAM Modulation

Journal of Microwaves, Optoelectronics and Electromagnetic Applications

This article covers the potential of Filter Bank Multicarrier (FBMC) modulation as an alternative... more This article covers the potential of Filter Bank Multicarrier (FBMC) modulation as an alternative to be used in the future 5G wireless networks in which Massive Multiple-Input Multiple-Output (MIMO) will be deployed. The study compares orthogonal frequency division multiplexing (OFDM) with FBMC. The former is the multiplexing technique in 4G communications and the latter is one of the strongest candidates to replace OFDM in 5G networks. This comparison evaluates the spectral efficiency (SE) of a Massive MIMO (MM) system uplink under a single-cell environment. The diversity in MM permits a self-equalization of the channel, which the FBMC further benefits from, due to the confinement of the subcarrier in an assigned range. Due to the absence of the cyclic prefix, the FBMC has better SE than the OFDM for increasing signal-to-noise-ratio (SNR). One may find a scarce literature covering the FBMC in a large-scale multiuser MIMO scenario, which considers a large number of antennas at the base station (BS). Various scenarios are considered by varying the number of antennas, users and different cell radius. Moreover, the subcarrier modulations are simulated, and not considered Gaussian distributed, as in Shannon limit theory. In some cases, the FBMC allows doubling the cell radius for the same SE value of 3.8 bits/s/Hz/user. For a fixed cell radius of 750m and a SE of 3.5 bits/s/Hz/user, the OFDM requires three times more antennas than FBMC when both modulations are under the same conditions.

Research paper thumbnail of Device and method for receiving RF signals based on heterodyne architecture using complex IF subsampling

Research paper thumbnail of Impact of a fully reconfigurable LNA on an RF front-end: A system level analysis

2014 21st IEEE International Conference on Electronics, Circuits and Systems (ICECS), 2014

Research paper thumbnail of Bandpass sampling Rx system design issues and architecture comparison for low power RF standards

This paper presents the trade-offs facing bandpass sampling receiver architectures for ultra-low ... more This paper presents the trade-offs facing bandpass sampling receiver architectures for ultra-low power applications. To illustrate these trade-offs, three different bandpass sampling receiver architectures are specified for the Bluetooth low energy and 802.15.4 standards using a novel system design methodology which guarantees fast convergence to a non-over-designed solution. A wideband simulation tool validates and optimizes the block parameters. The three

Research paper thumbnail of Artificial Neural Network Based Automatic Modulation Classification System Applied to FPGA

2021 34th SBC/SBMicro/IEEE/ACM Symposium on Integrated Circuits and Systems Design (SBCCI)

Research paper thumbnail of Spectral efficiency analysis for massive MIMO orthogonal frequency division multiplexing and filter bank multicarrier in a realistic scenario using signal‐to‐noise‐and‐distortion ratio and interpolation for different modulation coding schemes

Transactions on Emerging Telecommunications Technologies

Research paper thumbnail of Semana De Atualização Em Engenharia Elétrica 2019 / Electrical Engineering Updating Week 2019

Brazilian Journal of Development

Research paper thumbnail of Spectral Efficiency of Massive MIMO using FBMC-OQAM Modulation

Anais de XXXVI Simpósio Brasileiro de Telecomunicações e Processamento de Sinais

This article covers the potential of Filter Bank Multicarrier (FBMC) modulation to be used in the... more This article covers the potential of Filter Bank Multicarrier (FBMC) modulation to be used in the future 5G wireless networks where Massive Multiple-Input Multiple-Output (MIMO) will be deployed. The study compares orthogonal frequency division multiplexing (OFDM) with FBMC. The former is the multiplexing technique in 4G communications and the latter is one of the strongest candidates to replace OFDM in 5G networks. This comparison evaluates the spectral efficiency (SE) of a massive MIMO (MM) system uplink under a singlecell environment. Due to the absence of the cyclic prefix, the FBMC has better SE than the OFDM as the signal-to-noise-ratio (SNR) increases. However, to the best of the authors' knowledge, this study has not yet been conducted under a MM scenario. In summary, this article presents an analysis of SE of FBMC considering a MM setup. While limiting the modulation to 64-Quadrature Amplitude Modulation (QAM) per sub carrier, it was observed that as the SE increases, the required number of antennas for the OFDM becomes the double or the triple of the counterpart using FBMC, or even it is not achieved by the OFDM.

Research paper thumbnail of A fully integrated CMOS power amplifier with discrete gain control for efficiency enhancement

Research paper thumbnail of A low-power 10-bit 6.66MS/s CMOS SAR ADC with built-in digital calibration dedicated to IoT applications

Journal of Integrated Circuits and Systems

In this paper, an energy-efficient SAR ADC for IoT applications is presented. The proposed ADC re... more In this paper, an energy-efficient SAR ADC for IoT applications is presented. The proposed ADC relies on a built-in calibration circuit to improve accuracy and introduces an original DAC that merges the concepts of binary-weighted and C/2C arrays in order to achieve a favorable trade-off between area, accuracy and power consumption. The system consumes 58 µW per conversion cycle sampling at a frequency of 6.66 MHz with an SNDR of 49.78 dB for a 1MHz input signal. With an ENOB of 8 bits, the resulting FOM is 34fJ/conversion-step.

Research paper thumbnail of Spectral Efficiency Analysis in Massive MIMO using FBMC-OQAM Modulation

Journal of Microwaves, Optoelectronics and Electromagnetic Applications

This article covers the potential of Filter Bank Multicarrier (FBMC) modulation as an alternative... more This article covers the potential of Filter Bank Multicarrier (FBMC) modulation as an alternative to be used in the future 5G wireless networks in which Massive Multiple-Input Multiple-Output (MIMO) will be deployed. The study compares orthogonal frequency division multiplexing (OFDM) with FBMC. The former is the multiplexing technique in 4G communications and the latter is one of the strongest candidates to replace OFDM in 5G networks. This comparison evaluates the spectral efficiency (SE) of a Massive MIMO (MM) system uplink under a single-cell environment. The diversity in MM permits a self-equalization of the channel, which the FBMC further benefits from, due to the confinement of the subcarrier in an assigned range. Due to the absence of the cyclic prefix, the FBMC has better SE than the OFDM for increasing signal-to-noise-ratio (SNR). One may find a scarce literature covering the FBMC in a large-scale multiuser MIMO scenario, which considers a large number of antennas at the base station (BS). Various scenarios are considered by varying the number of antennas, users and different cell radius. Moreover, the subcarrier modulations are simulated, and not considered Gaussian distributed, as in Shannon limit theory. In some cases, the FBMC allows doubling the cell radius for the same SE value of 3.8 bits/s/Hz/user. For a fixed cell radius of 750m and a SE of 3.5 bits/s/Hz/user, the OFDM requires three times more antennas than FBMC when both modulations are under the same conditions.

Research paper thumbnail of Device and method for receiving RF signals based on heterodyne architecture using complex IF subsampling

Research paper thumbnail of Impact of a fully reconfigurable LNA on an RF front-end: A system level analysis

2014 21st IEEE International Conference on Electronics, Circuits and Systems (ICECS), 2014

Research paper thumbnail of Bandpass sampling Rx system design issues and architecture comparison for low power RF standards

This paper presents the trade-offs facing bandpass sampling receiver architectures for ultra-low ... more This paper presents the trade-offs facing bandpass sampling receiver architectures for ultra-low power applications. To illustrate these trade-offs, three different bandpass sampling receiver architectures are specified for the Bluetooth low energy and 802.15.4 standards using a novel system design methodology which guarantees fast convergence to a non-over-designed solution. A wideband simulation tool validates and optimizes the block parameters. The three

Log In