Patents by Inventor Langhorne Withers

Langhorne Withers 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).

  • Echo MIMO: a method for optimal multiple input multiple output channel estimation and matched cooperative beamforming
    Publication number: 20070099571
    Abstract: A method for estimating a communication channel comprising one or more sub-channels between at least a first transceiver and at least a second transceiver is provided. The method comprises transmitting a first set of training data from the first transceiver to the second transceiver, receiving observed signals at the second transceiver, re-transmitting said observed signal back to the first transceiver, and calculating a roundtrip channel estimate at the first transceiver. The method further comprises transmitting a second set of training data from the second transceiver to the first transceiver, receiving observed signals at the first transceiver, and calculating a reverse link channel estimate. From the roundtrip channel estimate and the reverse link channel estimate, a forward link channel estimate is computed at the first transceiver.
    Type: Application
    Filed: October 31, 2005
    Publication date: May 3, 2007
    Inventors: Langhorne Withers, Robert Taylor