Patents by Inventor Mohammad Amir Khojastepour

Mohammad Amir Khojastepour 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).

  • Wideband codebook construction and applications
    Patent number: 8494459
    Abstract: A precoding scheme in which the downlink channel is estimated and an optimal precoding matrix to be used by the multi antenna transmitter is determined accordingly. The optimal precoding matrix is selected from a codebook of matrices that includes matrices having a structure matched to that of the eigenvectors of the spatial covariance matrix, wherein the spatial covariance matrix is modeled as a Hermitian and Toeplitz matrix parameterized by a single complex-valued scalar.
    Type: Grant
    Filed: August 19, 2011
    Date of Patent: July 23, 2013
    Assignee: NEC Laboratories America, Inc.
    Inventors: Narayan Prasad, Mohammad Amir Khojastepour, Sampath Rangarajan
  • WIDEBAND CODEBOOK CONSTRUCTION AND APPLICATIONS
    Publication number: 20110305299
    Abstract: A precoding scheme in which the downlink channel is estimated and an optimal precoding matrix to be used by the multi antenna transmitter is determined accordingly. The optimal precoding matrix is selected from a codebook of matrices that includes matrices having a structure matched to that of the eigenvectors of the spatial covariance matrix, wherein the spatial covariance matrix is modeled as a Hermitian and Toeplitz matrix parameterized by a single complex-valued scalar.
    Type: Application
    Filed: August 19, 2011
    Publication date: December 15, 2011
    Applicant: NEC Laboratories America, Inc.
    Inventors: Narayan Prasad, Mohammad Amir Khojastepour, Sampath Rangarajan