Patents by Inventor Bernal A. Arroyo

Bernal A. Arroyo 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).

  • Cyclic shift delay detection using a classifier
    Patent number: 9497641
    Abstract: Systems, apparatus and methods for determining a cyclic shift delay (CSD) mode from a plurality of CSD modes is disclosed. A received OFDM signal is converted to a channel impulse response (CIR) signal in the time domain and/or a channel frequency response (CFR) signal in the frequency domain. Matched filters and a comparator are used to determine a most likely current CSD mode. Alternatively, a classifier is used with a number of inputs including outputs from two or more matched filters and one or more outputs from a feature extractor. The feature extractor extracts features in the time domain from the CIR signal and/or in the frequency domain from the CFR signal useful in distinguishing various CSD modes.
    Type: Grant
    Filed: February 5, 2013
    Date of Patent: November 15, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Lionel Jacques Garin, Vinay Sridhara, Xiaoxin Zhang, Sundar Raman, Gengsheng Zhang, Bernal A. Arroyo, Carlos Horacio Aldana
  • CYCLIC SHIFT DELAY DETECTION USING A CLASSIFIER
    Publication number: 20140153420
    Abstract: Systems, apparatus and methods for determining a cyclic shift delay (CSD) mode from a plurality of CSD modes is disclosed. A received OFDM signal is converted to a channel impulse response (CIR) signal in the time domain and/or a channel frequency response (CFR) signal in the frequency domain. Matched filters and a comparator are used to determine a most likely current CSD mode. Alternatively, a classifier is used with a number of inputs including outputs from two or more matched filters and one or more outputs from a feature extractor. The feature extractor extracts features in the time domain from the CIR signal and/or in the frequency domain from the CFR signal useful in distinguishing various CSD modes.
    Type: Application
    Filed: February 5, 2013
    Publication date: June 5, 2014
    Applicant: QUALCOMM Incorporated
    Inventors: Lionel Jacques Garin, Vinay Sridhara, Xiaoxin Zhang, Sundar Raman, Gengsheng Zhang, Bernal A. Arroyo, Carlos Horacio Aldana