Patents by Inventor Hamid Shafiee

Hamid Shafiee 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).

  • Channel estimation in OFDM communication systems
    Patent number: 10805117
    Abstract: Embodiments of the present disclosure include an OFDM receiver circuit, which includes an FFT circuit configured to calculate an FFT of a plurality of sample values received by the receiver circuit, and a smoothing circuit configured to identify equalizer coefficients for the sample values by truncating portions of an impulse response of the FFT.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: October 13, 2020
    Assignee: MICROCHIP TECHNOLOGY INCORPORATED
    Inventors: Hamid Shafiee, Mohsen Pourkhaatoun, Kiran Gowda, Siddharth Shetty, Esmael Heidari, Ali Fard, Rahim Bagheri, Masoud Djafari
  • Digital compensation of IQ coupling in communication receivers
    Patent number: 10122568
    Abstract: A receiver circuit includes a conversion circuit configured to down-convert a received radio-frequency signal to a baseband signal, an analog-to-digital converter configured to sample the baseband signal into a sampled signal, a Fast Fourier transform (FFT) circuit configured to perform an FFT on the sampled signal, and a digital compensation circuit configured to compensate for IQ distortion in a frequency domain.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: November 6, 2018
    Assignee: MICROCHIP TECHNOLOGY INCORPORATED
    Inventors: Hamid Shafiee, Mohsen Pourkhaatoun, Kiran Gowda, Siddharth Shetty, Esmael Heidari, Ali Fard, Rahim Bagheri, Masoud Djafari
  • Channel Estimation In OFDM Communication Systems
    Publication number: 20180013591
    Abstract: Embodiments of the present disclosure include an OFDM receiver circuit, which includes an FFT circuit configured to calculate an FFT of a plurality of sample values received by the receiver circuit, and a smoothing circuit configured to identify equalizer coefficients for the sample values by truncating portions of an impulse response of the FFT.
    Type: Application
    Filed: July 6, 2017
    Publication date: January 11, 2018
    Applicant: Microchip Technology Incorporated
    Inventors: Hamid Shafiee, Mohsen Pourkhaatoun, Kiran Gowda, Siddharth Shetty, Esmael Heidari, Ali Fard, Rahim Bagheri, Masoud Djafari
  • Digital Compensation Of IQ Coupling In Communication Receivers
    Publication number: 20180013605
    Abstract: A receiver circuit includes a conversion circuit configured to down-convert a received radio-frequency signal to a baseband signal, an analog-to-digital converter configured to sample the baseband signal into a sampled signal, a Fast Fourier transform (FFT) circuit configured to perform an FFT on the sampled signal, and a digital compensation circuit configured to compensate for IQ distortion in a frequency domain.
    Type: Application
    Filed: July 6, 2017
    Publication date: January 11, 2018
    Applicant: Microchip Technology Incorporated
    Inventors: Hamid Shafiee, Mohsen Pourkhaatoun, Kiran Gowda, Siddharth Shetty, Esmael Heidari, Ali Fard, Rahim Bagheri, Masoud Djafari