Patents by Inventor Badrinarayanan Varadarajan

Badrinarayanan Varadarajan 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 providing closed-loop transmit precoding
    Publication number: 20060039489
    Abstract: A method for providing closed-loop transmit precoding between a transmitter and a receiver, includes defining a codebook that includes a set of unitary rotation matrices. The receiver determines which preceding rotation matrix from the codebook should be used for each sub-carrier that has been received. The receiver sends an index to the transmitter, where the transmitter reconstructs the precoding rotation matrix using the index, and precodes the symbols to be transmitted using the preceding rotation matrix. An apparatus that employs this closed-loop technique is also described.
    Type: Application
    Filed: July 15, 2005
    Publication date: February 23, 2006
    Applicant: Texas Instruments Incorporated
    Inventors: Muhammad Ikram, Eko Onggosanusi, Vasanthan Raghavan, Anand Dabak, Srinath Hosur, Badrinarayanan Varadarajan