Patents by Inventor Lee M. Garth

Lee M. Garth 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).

  • Patent number: 8477890
    Abstract: A desired signal modulated with N symbols is detected in the presence of a constant modulus (CM) interferer that produces M symbols. Observation samples corresponding to the desired signal and the interferer are obtained from a signal recovery stage. N observation constellations are defined, each having M constellation points corresponding to the symbols produced by the interferer, and the points form a circular perimeter of the constellation with a radius corresponding to the strength of the interferer. The perimeter of each constellation is centered on one of N defined symbol points representing the different possible symbols of the desired signal. Distances between the observation samples and the circular perimeter of each observation constellation are determined. For each observation sample, the symbol point on which the constellation perimeter closest to the sample is centered, is selected as a symbol of the desired signal.
    Type: Grant
    Filed: May 24, 2010
    Date of Patent: July 2, 2013
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Lee M. Garth, Gary R. Lomp, Matthew J. Sherman
  • Patent number: 7970046
    Abstract: Provided is a block Time Domain Equalizer (TDE) for a Time Reversal-Space Time Block Codes (TR-STBC) system. The block TDE comprises a block equalizer which generates an output based on an equalizer tap weight with respect to two consecutively received blocks, an equalizer tap weight updating unit which generates an error vector based on the output and the equalizer tap weight and updates the equalizer tap weight using the error vector, and a signal processing unit which processes the output into a digital signal wherein zero padding is eliminated from the output.
    Type: Grant
    Filed: September 7, 2007
    Date of Patent: June 28, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Lee M. Garth, Abdulla Firag, Eung Sun Kim
  • Publication number: 20110134981
    Abstract: A desired signal modulated with N symbols is detected in the presence of a constant modulus (CM) interferer that produces M symbols. Observation samples corresponding to the desired signal and the interferer are obtained from a signal recovery stage. N observation constellations are defined, each having M constellation points corresponding to the symbols produced by the interferer, and the points form a circular perimeter of the constellation with a radius corresponding to the strength of the interferer. The perimeter of each constellation is centered on one of N defined symbol points representing the different possible symbols of the desired signal. Distances between the observation samples and the circular perimeter of each observation constellation are determined. For each observation sample, the symbol point on which the constellation perimeter closest to the sample is centered, is selected as a symbol of the desired signal.
    Type: Application
    Filed: May 24, 2010
    Publication date: June 9, 2011
    Inventors: Lee M. Garth, Gary R. Lomp, Matthew J, Sherman
  • Patent number: 7813423
    Abstract: A fast adaptive time domain equalizer for a Time Reversal-Space Time Block Code (TR-STBC) system is provided. More particularly, a reduced-complexity hybrid Decision Feedback Equalizer (DFE) configuration for the TR-STBC system, and a Least Mean Square (LMS), a normalized LMS (NLMS), and a Recursive Least Square (RLS)-based adaptive algorithms for the hybrid DFE are provided.
    Type: Grant
    Filed: September 7, 2007
    Date of Patent: October 12, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Lee M. Garth, Eung Sun Kim
  • Publication number: 20080080612
    Abstract: A fast adaptive time domain equalizer for a Time Reversal-Space Time Block Code (TR-STBC) system is provided. More particularly, a reduced-complexity hybrid Decision Feedback Equalizer (DFE) configuration for the TR-STBC system, and a Least Mean Square (LMS), a normalized LMS (NLMS), and a Recursive Least Square (RLS)-based adaptive algorithms for the hybrid DFE are provided.
    Type: Application
    Filed: September 7, 2007
    Publication date: April 3, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Lee M. Garth, Eung Sun Kim
  • Publication number: 20080080613
    Abstract: Provided is a block Time Domain Equalizer (TDE) for a Time Reversal-Space Time Block Codes (TR-STBC) system. The block TDE comprises a block equalizer which generates an output based on an equalizer tap weight with respect to two consecutively received blocks, an equalizer tap weight updating unit which generates an error vector based on the output and the equalizer tap weight and updates the equalizer tap weight using the error vector, and a signal processing unit which processes the output into a digital signal wherein zero padding is eliminated from the output.
    Type: Application
    Filed: September 7, 2007
    Publication date: April 3, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Lee M. Garth, Abdulla Firag, Eung Sun Kim