Patents by Inventor Shahriar Enami

Shahriar Enami 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).

  • Velocity enhancement for OFDM systems
    Patent number: 6904550
    Abstract: An orthogonal frequency division multiplexing (OFDM) transmitter method, consistent with certain embodiments of the present invention arranges OFDM data symbols representing data bits for transmission in a packet. A prescribed pattern of OFDM data symbols are removed (212) and replaced (216) with pilot symbols. The packet is then transmitted (220) to an OFDM receiver that receives the packet (224) and determines a channel correction factor from the pilot pattern. The receiver then estimates a plurality of channel correction factors, one for each of the plurality of OFDM symbols representing data (228) and uses these correction factors to correct the OFDM symbols representing data (232). Arbitrary data are then inserted in place of the pilot symbols (236). The OFDM symbols representing data along with the arbitrary data are then decoded using an error correction decoder that corrects the errors induced by substitution of the pilot symbols for data symbols (240).
    Type: Grant
    Filed: December 30, 2002
    Date of Patent: June 7, 2005
    Assignee: Motorola, Inc.
    Inventors: Salvador Sibecas, Glafkos Stratis, Celestino Corral, Shahriar Enami, Gregg Rasor, Robert Gorday
  • Velocity enhancement for OFDM Systems
    Publication number: 20040128605
    Abstract: An orthogonal frequency division multiplexing (OFDM) transmitter method, consistent with certain embodiments of the present invention arranges OFDM data symbols representing data bits for transmission in a packet. A prescribed pattern of OFDM data symbols are removed (212) and replaced (216) with pilot symbols. The packet is then transmitted (220) to an OFDM receiver that receives the packet (224) and determines a channel correction factor from the pilot pattern. The receiver then estimates a plurality of channel correction factors, one for each of the plurality of OFDM symbols representing data (228) and uses these correction factors to correct the OFDM symbols representing data (232). Arbitrary data are then inserted in place of the pilot symbols (236). The OFDM symbols representing data along with the arbitrary data are then decoded using an error correction decoder that corrects the errors induced by substitution of the pilot symbols for data symbols (240).
    Type: Application
    Filed: December 30, 2002
    Publication date: July 1, 2004
    Inventors: Salvador Sibecas, Glafkos Stratis, Celestino Corral, Shahriar Enami, Gregg Rasor, Robert Gorday