Patents by Inventor Pedro Viegas

Pedro Viegas has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for the decomposition of signals with varying envelope into offset components
    Patent number: 11265200
    Abstract: A method and apparatus for decomposition of signals with varying envelope into offset components are disclosed here, that sample the time variant envelope of a single carrier (SC) or a multi-carrier (MC) band limited signal, quantizes the sampled value using Nb quantization bits and decomposes the sample into Nb in-phase and quadrature components that are combined in pairs and modulated to generate a set of Nb offset signals. The pulse shape applied in each offset signal is selected according to the spectral mask needed for the signal and to minimize envelope fluctuations in each offset signal from the set of Nb components.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: March 1, 2022
    Inventors: Paulo Carvalho, Rui Dinis, Joäo Guerreiro, Pedro Viegas, Joäo Oliveira, Joäo Madeira
  • Method and apparatus for the decomposition of signals with varying envelope into offset components
    Publication number: 20200403839
    Abstract: A method and apparatus for decomposition of signals with varying envelope into offset components are disclosed here, that sample the time variant envelope of a single carrier (SC) or a multi-carrier (MC) band limited signal, quantizes the sampled value using Nb quantization bits and decomposes the sample into Nb in-phase and quadrature components that are combined in pairs and modulated to generate a set of Nb offset signals. The pulse shape applied in each offset signal is selected according to the spectral mask needed for the signal and to minimize envelope fluctuations in each offset signal from the set of Nb components.
    Type: Application
    Filed: June 20, 2019
    Publication date: December 24, 2020
    Inventors: Paulo Carvalho, Rui Dinis, João Guerreiro, Pedro Viegas, João Oliveira, João Madeira
  • Apparatus for quantized linear amplification with nonlinear amplifiers
    Publication number: 20180254754
    Abstract: An apparatus for quantized linear amplification with nonlinear amplifiers that performs a linear amplification of variable-envelope single carrier (SC) or multi-carrier (MC) bandpass signals, based on sampled and quantized versions of its complex envelope, where the quantizer generates Nb bits that are mapped into Nm?Nb polar components, in which the quantized symbol can be decomposed, that are modulated as Nm constant or quasi constant envelope signals and where each one is amplified by a nonlinear amplifier.
    Type: Application
    Filed: March 1, 2017
    Publication date: September 6, 2018
    Inventors: Paulo Carvalho, Marko Beko, Rui Dinis, João Guerreiro, Pedro Viegas
  • Apparatus for quantized linear amplification with nonlinear amplifiers
    Patent number: 10069467
    Abstract: An apparatus for quantized linear amplification with nonlinear amplifiers that performs a linear amplification of variable-envelope single carrier (SC) or multi-carrier (MC) bandpass signals, based on sampled and quantized versions of its complex envelope, where the quantizer generates Nb bits that are mapped into Nm?Nb polar components, in which the quantized symbol can be decomposed, that are modulated as Nm constant or quasi constant envelope signals and where each one is amplified by a nonlinear amplifier.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: September 4, 2018
    Inventors: Paulo Carvalho, Marko Beko, Rui Dinis, Joao Guerreiro, Pedro Viegas