Patents Assigned to Spectral DSP Corp
  • Patent number: 11876661
    Abstract: System and methods for shaped single carrier orthogonal frequency division multiplexing with low peak to average power ratio are provided. The system receives an input signal and modulates the input signal to form Dirichlet kernels in a time domain to generate an offset Dirichlet kernel output time array where each Dirichlet kernel has a main lobe and a plurality of side lobes. Modulating the input signal suppresses a peak to average power ratio of the offset Dirichlet kernel output time array by reducing the plurality of side lobes of each Dirichlet kernel and respective amplitudes of the side lobes.
    Type: Grant
    Filed: January 13, 2023
    Date of Patent: January 16, 2024
    Assignee: Spectral DSP Corp.
    Inventors: Fredric J. Harris, Martial Gander
  • Publication number: 20230049687
    Abstract: Systems and methods for shaped single carrier orthogonal frequency division multiplexing with low peak to average power ratio. The system receives an input signal and modulates the input signal to form Dirichlet kernels in a time domain to generate an offset Dirichlet kernel output time array where each Dirichlet kernel has a main lobe and a plurality of side lobes. The system modulates the input signal by receiving the input signal by an N-point time input array and transforming the N-point time input array to the frequency domain by a discrete Fourier transform to generate an N-point input frequency array. The system replicates the N-point input frequency array to generate an M-point input frequency array where M is greater than N and utilizes a filter to generate a shaped M-point output filtered frequency array by multiplying the M-point input frequency array and the filter.
    Type: Application
    Filed: June 13, 2022
    Publication date: February 16, 2023
    Applicant: Spectral DSP Corp
    Inventors: Fredric J. Harris, Martial Gander
  • Patent number: 11563617
    Abstract: System and methods for shaped single carrier orthogonal frequency division multiplexing with low peak to average power ratio are provided. The system receives an input signal and modulates the input signal to form Dirichlet kernels in a time domain to generate an offset Dirichlet kernel output time array where each Dirichlet kernel has a main lobe and a plurality of side lobes. Modulating the input signal suppresses a peak to average power ratio of the offset Dirichlet kernel output time array by reducing the plurality of side lobes of each Dirichlet kernel and respective amplitudes of the side lobes.
    Type: Grant
    Filed: April 21, 2021
    Date of Patent: January 24, 2023
    Assignee: Spectral DSP Corp.
    Inventor: Fredric J. Harris
  • Publication number: 20210336828
    Abstract: System and methods for shaped single carrier orthogonal frequency division multiplexing with low peak to average power ratio are provided. The system receives an input signal and modulates the input signal to form Dirichlet kernels in a time domain to generate an offset Dirichlet kernel output time array where each Dirichlet kernel has a main lobe and a plurality of side lobes. Modulating the input signal suppresses a peak to average power ratio of the offset Dirichlet kernel output time array by reducing the plurality of side lobes of each Dirichlet kernel and respective amplitudes of the side lobes.
    Type: Application
    Filed: April 21, 2021
    Publication date: October 28, 2021
    Applicant: Spectral DSP Corp
    Inventor: Fredric J. Harris