Patents by Inventor Lawrence A. Downing

Lawrence A. Downing 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).

  • Transmission technique selector for radio communication systems with multiple transmit and multiple receive antennas
    Patent number: 7477699
    Abstract: A radio communications device (102) that has multiple receive antennas processes received data communications signals to select between space time coding and spatial multiplexing as a selected transmission technique from a base device (104) that has multiple transmit antennas. A channel throughput (402-412, 450-454) for each transmission technique is estimated based on signal to interference and noise ratios (502-512, 550-554) of signals being transmitted through a MIMO channel (140) as measured by a receiver (708). The transmission technique with the higher estimated throughput is determined. If spatial multiplexing is determined to have the higher estimated throughput and the throughput of each layer of the spatially multiplexed signal is greater than a threshold, spatial multiplexing is selected. Otherwise, space time coding is selected.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: January 13, 2009
    Assignee: Motorola, Inc.
    Inventors: Fan Wang, Lawrence A. Downing, Amitava Ghosh, Chandrasekar Sankaran, Jun Tan
  • METHOD AND APPARATUS FOR ALTERING MOBILE DEVICE BEHAVIOR BASED ON RFID TAG DISCOVERY
    Publication number: 20080160984
    Abstract: A communication system is provided that comprises a Radio Frequency Identification (RFID) network coupled to a service provider network. An RFID reader of the RFID network detects an RFID tag associated with a mobile station when the mobile station is present in, or proximate to, a controlled area. The RFID network routes information associated with the RFID tag to the service provider network and, based on the information received from the RFID network, the service provider network alters a behavior of the mobile station when the mobile station is entering, exiting, or present in the controlled area.
    Type: Application
    Filed: July 10, 2007
    Publication date: July 3, 2008
    Applicant: MOTOROLA, INC.
    Inventors: Stanley J. Benes, Anthony K. Dean, Lawrence A. Downing, Dennis R. Schaeffer, Subir Saha, Samir Dilipkumar Saklikar, Ishita Majumdar, John M. Harris
  • TRANSMISSION TECHNIQUE SELECTOR FOR RADIO COMMUNICATION SYSTEMS WITH MULTIPLE TRANSMIT AND MULTIPLE RECEIVE ANTENNAS
    Publication number: 20080151804
    Abstract: A radio communications device (102) that has multiple receive antennas processes received data communications signals to select between space time coding and spatial multiplexing as a selected transmission technique from a base device (104) that has multiple transmit antennas. A channel throughput (402-412, 450-454) for each transmission technique is estimated based on signal to interference and noise ratios (502-512, 550-554) of signals being transmitted through a MIMO channel (140) as measured by a receiver (708). The transmission technique with the higher estimated throughput is determined. If spatial multiplexing is determined to have the higher estimated throughput and the throughput of each layer of the spatially multiplexed signal is greater than a threshold, spatial multiplexing is selected. Otherwise, space time coding is selected.
    Type: Application
    Filed: December 20, 2006
    Publication date: June 26, 2008
    Applicant: MOTOROLA, INC.
    Inventors: Fan Wang, Lawrence A. Downing, Amitava Ghosh, Chandrasekar Sankaran, Jun Tan